JP2022076104A - Aquaculture device, rearing method for aquaculture object and underwater luminaire - Google Patents

Abstract

To provide an underwater luminaire which is installed in water and radiates an on-water side, and provide an aquaculture device and a rearing method for aquaculture object capable of promoting growth of the aquaculture objects and suppressing cost using the underwater luminaire.SOLUTION: An aquaculture device 1 includes: a luminaire 10 including a luminaire main body 10a and a suspension member 6; and a holding member 2 for holding the luminaire main body 10a in a prescribed position in water through the suspension member 6. The luminaire 10 controls turning on and turning off toward an on-water side for adjusting brightness on at least one of the periphery of the luminaire main body 10a and aquaculture objects.SELECTED DRAWING: Figure 1

Description

The present invention relates to an aquaculture apparatus, a method for growing an aquaculture object, and an underwater lighting apparatus.

In wakame seaweed cultivation, wakame seaweed rooted in a rope stretched in water is grown downward (on the bottom side of the water) (unlike in nature).
In addition, when a diver is submerged in water, radio waves cannot be used, so he / she may get lost in the water, and it is difficult to know the diver's whereabouts from above the water.
Furthermore, underwater lighting effects are important for entertainment such as fountain shows and underwater illuminations.
In particular, it takes a long time to grow and harvest aquaculture objects (seaweed, etc.). For example, in Patent Document 1 below, the growth of aquaculture target is promoted by irradiating the aquaculture target with light from the upper side to the bottom side of the water using lighting, and the cultivation and harvesting of the aquaculture target are carried out. A method for growing aquaculture objects that shortens the period is disclosed.

Japanese Unexamined Patent Publication No. 2008-54530

Until now, there has been no suitable underwater lighting device installed underwater to illuminate the upper side of the water.
For example, in wakame seaweed farming, it has been required to irradiate the upper side of the water from the bottom side so as to promote the downward growth.
In addition, it has been required to irradiate the upper side of the water from the bottom side so that the whereabouts of the diver can be known even from the water.
Furthermore, in the world of entertainment such as fountain shows and underwater illuminations, effective lighting for spectators on the ground has been required.
In particular, the growth promoting effect of the aquaculture target by irradiating the aquaculture target with light using lighting is remarkable only when the aquaculture target is not sufficiently irradiated with sunlight. However, in the prior art, even when the sunlight is sufficiently irradiated, the aquaculture object may be irradiated with light from the upper side of the water to the lower side of the water by using the lighting. For this reason, extra costs such as electricity costs are required, and there remains a problem in that the growth of aquaculture objects is promoted at low cost.

An object of the present invention is to provide an underwater lighting device that is installed underwater and irradiates the upper side of water. Another object of the present invention is to provide a low-cost aquaculture device capable of promoting the growth of an aquaculture object using the underwater lighting device and a method for growing the aquaculture object.

In order to solve the above-mentioned problems, in the aquaculture apparatus according to the present invention, an underwater illuminating device main body and an underwater illuminating device provided with a hanging member, and the underwater illuminating device main body are placed underwater via the hanging member. The underwater illuminating device includes a holding member that holds the luminaire at the position of Can be adjusted.

In the above configuration, the underwater illuminating device main body is held below the aquaculture object by the holding member.

In the above configuration, a timer for measuring time and a control unit for acquiring time information from the timer and controlling turning on and off of the underwater lighting device in response to the time information are provided.

In the above configuration, an optical sensor that detects the brightness, and a control unit that acquires the brightness information from the optical sensor and controls lighting and extinguishing of the underwater lighting device in response to the brightness information. , Equipped with.

In the above configuration, a weight attached to the underwater illuminator is provided, and the gravity acting on the underwater illuminator and the weight is larger than the buoyancy acting on the underwater illuminator and the weight.

In order to solve the above-mentioned problems, the method for growing an aquaculture object according to the present invention is a method for growing an aquaculture object using any of the above-mentioned aquaculture devices, and the brightness is a predetermined brightness. The present invention includes a lighting step of turning on the underwater lighting device when the brightness is less than the above, and a turning-off step of turning off the underwater lighting device when the brightness is equal to or higher than the predetermined brightness.

In order to solve the above problems, the underwater lighting device according to the present invention includes a light source for irradiating light, a housing for accommodating the light source inside, and a holding member for holding the housing at a predetermined position in water. It is provided with a hanging member for connecting the housing and the housing, and is installed in water to irradiate the upper side of the water.

In the above configuration, the holding member is arranged at a predetermined position from the water surface, and the hanging member connects to the holding member and extends downward to suspend the housing.

In the above configuration, the holding member is formed by twisting a plurality of wires, and the hanging member is formed in a gap between the hanging member main body extending from the holding member toward the housing and the plurality of wires. It has an insertion portion to be inserted, and the insertion portion is provided at a plurality of locations of the hanging member main body.

In the above configuration, the hanging member is provided with a connecting portion for connecting the hanging member and the housing, the connecting portion is formed in an annular shape, and the hanging member has a hook portion that is hooked on the connecting portion, and the hook portion is provided. The portion is formed in an L shape.

In the above configuration, a plurality of the connecting portions are provided, and at least one of the weight hanging member to which the weight is connected to the lower end and the suspending member is connected to any of the plurality of connecting portions. It is possible.

In the above configuration, the wavelength of the light emitted from the light source is 400 nm or more and 500 nm or less.

Therefore, the present invention provides an underwater lighting device that is installed underwater and irradiates the upper side of the water. Further, the present invention provides a low-cost aquaculture device capable of promoting the growth of an aquaculture object using the underwater lighting device, and a method for growing the aquaculture object.

It is a perspective view of the fishery culture apparatus which concerns on 1st Embodiment. It is a perspective view of the lighting apparatus which concerns on 1st Embodiment. It is an exploded perspective view of the lighting apparatus which concerns on 1st Embodiment. It is a top view of the ring for mounting the lighting apparatus which concerns on 1st Embodiment. It is a figure which shows the experimental method for confirming the effect which promotes the growth of wakame seaweed by the lighting apparatus main body. It is a graph which compares the growth rate of the spore body of wakame seaweed in the experimental group and the comparative group. It is a perspective view of the fishery culture apparatus which concerns on 2nd Embodiment. It is a side view of the aquaculture apparatus which concerns on 3rd Embodiment. It is a top view of the lighting apparatus main body in the fishery culture apparatus which concerns on 3rd Embodiment. It is a side view of the aquaculture apparatus which concerns on 3rd Embodiment. It is a side view of the aquaculture apparatus which concerns on 3rd Embodiment. It is a side view of the aquaculture apparatus which concerns on 3rd Embodiment. It is a perspective view around the hook part in the fishery culture apparatus which concerns on 3rd Embodiment. It is a perspective view around the hook part in the fishery culture apparatus which concerns on 3rd Embodiment.

(First Embodiment)
(Aquaculture equipment)
Hereinafter, the aquaculture apparatus 1 according to the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the aquaculture apparatus 1.
The aquaculture apparatus 1 is used for aquaculture of seaweeds such as wakame seaweed S (corresponding to the “object for aquaculture” in the claims).
As shown in FIG. 1, the aquaculture apparatus 1 is arranged, for example, in the seawater in the bay where the wakame seaweed S is cultivated. The aquaculture device 1 has a holding member 2, a lighting device 10 (corresponding to the "underwater lighting device" of the claim), and a weight 3.

(Holding member)
The holding member 2 is one rope 5. The holding member 2 is stretched over, for example, a plurality of rafts (not shown) floating on the water surface. As a result, the holding member 2 is arranged at a predetermined position from the water surface. The "predetermined position from the water surface" where the holding member 2 is arranged is, for example, 1 m below the water surface. Wakame seaweed S is rooted in the holding member 2.

(Lighting device)
FIG. 2 is a perspective view of the lighting device 10.
FIG. 3 is an exploded perspective view of the lighting device 10.
As shown in FIGS. 1 to 3, the lighting device 10 is held by the holding member 2. The lighting device 10 includes a lighting device main body 10a (corresponding to the "underwater lighting device main body" in the claim), a timer 41, a control unit 40, a ring 50, and a hanging member 6.
The illuminating device main body 10a is held at a predetermined position in water by the holding member 2. The "predetermined position in water" in which the illuminating device main body 10a is held may be any position, for example, a position within a range of 1000 mm to 3000 mm downward from the water surface, and may be a shallow place or a deep place. The lighting device main body 10a is arranged below the wakame seaweed S. The lighting device main body 10a irradiates the water upper side from the water bottom side. The lighting device 10 can adjust the photon density (corresponding to the "brightness" of the claim) on the surface of the wakame seaweed S by controlling the lighting and extinguishing of the lighting device main body 10a. The lighting device 10 irradiates the wakame seaweed S with light, for example, when the photon density on the surface of the wakame seaweed S is lower than a predetermined photon density. The “predetermined photon density” is, for example, 15 μmol / m ² / s. As shown in FIGS. 2 and 3, the lighting device main body 10a includes a housing 20, a battery case 30, a battery 31, and a light source 11.

The housing 20 has a tubular portion 21, a first cap 22, and a second cap 23. The tubular portion 21 is formed in a cylindrical shape. The axial direction of the tubular portion 21 is along the vertical direction. The tubular portion 21 is made of vinyl chloride.
In the following description, the axial direction of the tubular portion 21 is simply referred to as "axial direction", the direction orthogonal to the "axial direction" is referred to as "diametrical direction", and the direction around the "axial direction" is referred to as "circumferential direction".
A plurality of convex portions 24 are provided in the intermediate portion in the axial direction on the outer peripheral surface 21a of the tubular portion 21. The plurality of convex portions 24 are provided at equal intervals in the circumferential direction. The convex portion 24 extends in the axial direction. The convex portion 24 is formed in a semicircular shape when viewed from the axial direction. The convex portion 24 prevents the hand from slipping from the tubular portion 21 when the operator using the aquaculture apparatus 1 grips the tubular portion 21. Threaded grooves are formed at both ends 21b and 21c in the axial direction on the outer peripheral surface 21a of the tubular portion 21, respectively. The end portion 21b is located above the end portion 21c.

The first cap 22 is provided on the one end portion 21b side in the axial direction of the tubular portion 21. The first cap 22 is formed in a bottomed cylindrical shape. The first cap 22 is arranged coaxially with the central axis C of the tubular portion 21. The first cap 22 has a peripheral wall portion 22a and a window portion 25. The peripheral wall portion 22a is formed in a cylindrical shape. The inner diameter of the peripheral wall portion 22a is larger than the outer diameter of the tubular portion 21. The peripheral wall portion 22a is made of vinyl chloride. A screw groove is formed on the inner peripheral surface of the peripheral wall portion 22a. As a result, the first cap 22 is tightened to one end 21b of the tubular portion 21. An O-ring 4a is provided between the peripheral wall portion 22a and the one end portion 21b of the tubular portion 21. The O-ring 4a prevents water from entering the inside of the housing 20.
The window portion 25 is the bottom portion of the first cap 22. The window portion 25 is formed in a disk shape. The window portion 25 is an acrylic plate having light transmission.

The second cap 23 is provided on the other end portion 21c side in the axial direction of the tubular portion 21. Since the second cap 23 has the same configuration as the first cap 22, detailed description thereof will be omitted. The second cap 23 has a peripheral wall portion 23a and a bottom plate 26 provided at the bottom portion. An O-ring 4b for preventing inundation is provided between the peripheral wall portion 23a and the other end portion 21c of the tubular portion 21. The bottom plate 26 is an acrylic plate formed in the shape of a disk.

As shown in FIG. 3, the battery case 30 is housed inside the tubular portion 21 of the housing 20. The battery case 30 is formed in a columnar shape extending in the axial direction. Bottom plates 32 are provided at both ends of the battery case 30 in the axial direction. A plurality of terminals 33 are provided on the bottom plate 32. An accommodating recess 35 is provided on the outer peripheral surface of the battery case 30. The accommodating recess 35 is radially open.
The battery 31 is housed in the housing recess 35. The battery 31 is a plurality of batteries 31a. In the present embodiment, the battery 31a is a C size battery. The battery 31a forms three battery units 36 connected in series in the axial direction. The three battery units 36 are housed in the housing recess 35. The three battery units 36 are connected in parallel via a plurality of terminals 33.

The light source 11 is composed of a plurality of blue LEDs 11a (LIGHT EMITTING DIODE). The light source 11 is housed inside the tubular portion 21 of the housing 20. The light source 11 is arranged between the window portion 25 of the first cap 22 and the battery case 30 in the axial direction. The light source 11 irradiates light so that the surface of the wakame seaweed S has a predetermined photon density or higher. The optical axis of the light source 11 is coaxial with the central axis C of the tubular portion 21. The wavelength of the light emitted from the blue LED 11a is 400 nm or more and 500 nm or less.

The timer 41 and the control unit 40 are housed inside the cylinder portion 21 of the housing 20. The timer 41 measures the time. The control unit 40 includes a substrate 40a and an element (not shown). The substrate 40a is formed in the shape of a rectangular plate extending in the axial direction. The substrate 40a is electrically connected to the battery 31. A timer 41 is installed on the substrate 40a in a state of being electrically connected to the substrate 40a. The control unit 40 acquires time information from the timer 41 and controls turning on and off of the light source 11 in response to the time information. The control unit 40 turns on the light source 11 from 16:00 pm to 6:00 am, for example, when the photon density on the surface of the wakame seaweed S (see FIG. 1) cannot be equal to or higher than a predetermined photon density only by sunlight. The control unit 40 turns off the light source 11 from 6:00 am to 16:00 pm, for example, when the photon density on the surface of the wakame seaweed S can be equal to or higher than a predetermined photon density only by sunlight.

FIG. 4 is a plan view of the ring 50 for mounting the lighting device 10.
As shown in FIGS. 2 to 4, the ring 50 has a ring main body 51 and connecting portions 52 and 53.
The ring body 51 is extrapolated to the tubular portion 21 of the housing 20. The ring body 51 is arranged coaxially with the central axis C and the optical axis of the tubular portion 21. The inner peripheral edge 51a of the ring body 51 is formed in an annular shape. The inner diameter of the ring body 51 is larger than the outer diameter of the tubular portion 21 and smaller than the outer diameter of the first cap 22 and the outer diameter of the second cap 23. Therefore, the ring body 51 is movable in the axial direction between the first cap 22 and the second cap 23.

Five connecting portions 52 and 53 are provided on the outer peripheral edge portion 51b of the ring main body 51. The connecting portions 52 and 53 are formed in an annular shape. The central axis of the connecting portions 52 and 53 is parallel to the central axis of the ring body 51.

As shown in FIG. 1, two hanging members 6 are provided in the lighting device 10. The hanging member 6 extends downward from the holding member 2. As shown in FIGS. 1 and 4, the suspending member 6 connects the holding member 2 and the housing 20 of the lighting device main body 10a via a ring 50. One connecting portion 52, 53 is connected to the lower end of each hanging member 6. Hereinafter, the connecting portions 52 and 53 to which the hanging member 6 is connected will be referred to as a first connecting portion 52. The two first connecting portions 52 are arranged symmetrically about the optical axis when viewed from the axial direction. The hanging member 6 is preferably a metal wire having a predetermined rigidity. In that case, the rigidity of the hanging member 6 is, for example, 200 GPa or more. The hanging member 6 extends downward from the holding member 2. The upper ends of the two suspending members 6 are attached to the holding member 2. The upper ends of the two suspending members 6 are provided at positions arranged on both sides of the holding member 2 in the longitudinal direction with the wakame seaweed S interposed therebetween. The first connection portion 52 of the ring 50 in the lighting device 10 is connected to the lower ends of the two suspension members 6. The two suspending members 6 suspend the lighting device main body 10a and hold it below the wakame seaweed S.

(Weight hanging member, weight)
The upper ends of the three weight hanging members 7 having one weight at the lower end are connected to the three connection portions 53 except for the first connection portion 52 out of the five connection portions 52, 53, respectively. Will be done. Hereinafter, the connecting portions 52 and 53 to which the weight suspending member 7 is connected will be referred to as a second connecting portion 53. The three second connecting portions 53 are arranged around the optical axis at intervals of 120 degrees when viewed from the axial direction.
The weight 3 is made of metal, for example. The gravity acting on the lighting device 10 and the weight 3 is larger than the buoyancy acting on the lighting device 10 and the weight 3. The weight 3 causes the lighting device 10 to sink below the wakame seaweed S by gravity.
The weight suspension member 7 is a member that extends in the vertical direction. It is desirable that the weight suspending member 7 is a metal wire having a predetermined rigidity. In that case, the rigidity of the weight suspension member 7 is, for example, 200 GPa or more. The upper end of the weight suspending member 7 is connected to the second connecting portion 53. One weight 3 is connected to the lower ends of the three weight suspending members 7. The lengths of the three weight suspension members 7 in the vertical direction are equal to each other.

(How to grow wakame seaweed)
Hereinafter, a method for raising wakame seaweed S using the aquaculture apparatus 1 will be described.
The method for raising wakame seaweed S includes a lighting process and a lighting process.
(Lighting process)
The lighting process is a process of lighting the lighting device 10.
In the lighting step, the timer 41 measures, for example, a time zone in which the photon density on the surface of the wakame seaweed S is less than a predetermined photon density (hereinafter referred to as “lighting time zone”). Then, the control unit 40 acquires the information of the lighting time zone from the timer 41 and turns on the light source 11 in the lighting time zone. The lighting time zone is, for example, a time from 16:00 pm to 6:00 am. As a result, the wakame seaweed S is irradiated with light from the lighting device 10 during the lighting time zone.

(Extinguishing process)
The turn-off step is a step of turning off the lighting device 10.
In the extinguishing step, the timer 41 measures, for example, a time zone in which the photon density on the surface of the wakame seaweed S is equal to or higher than a predetermined photon density (hereinafter referred to as “extinguished time zone”). Then, the control unit 40 acquires the information of the extinguishing time zone from the timer 41 and turns off the light source 11 in the extinguishing time zone. The turn-off time zone is, for example, a time from 16:00 pm to 6:00 am. In the off time zone, when the weather is fine, the wakame seaweed S is sufficiently exposed to sunlight. Therefore, during the extinguishing time zone, the wakame seaweed S can sufficiently perform photosynthesis even without the light irradiation of the lighting device 10.

(Experimental results on the main body of the lighting device)
Hereinafter, the results of an experiment on the lighting device main body 10a will be described.
FIG. 5 is a diagram showing an experimental method for confirming the effect of the lighting device main body 10a on promoting the growth of wakame seaweed S.

As shown in FIG. 5, an experiment was conducted in which wakame seaweed S was grown in an indoor aquarium 100. The water tank 100 is formed in a cubic shape. The water tank 100 is open upward. The vertical dimension L of the water tank 100 is 80 cm. The horizontal dimension W of the water tank 100 is 130 cm. The height dimension H of the water tank 100 is 60 cm. The water tank 100 is injected with water. The water tank 100 is divided into 6 sections by using a partition plate 101. The partition plate 101 has a light-shielding property. The volumes of the six compartments are equal to each other. Two rods 102 along the lateral direction are arranged on the opening edge 100a of the water tank 100. One seedling board 104 is arranged in each of the six compartments. Each seedling plate 104 is suspended from a rod 102 via a wire 103. The seedling plate 104 is arranged at a position 35 cm below the rod 102. The seedling plate 104 is placed in water. The seedling plate 104 is along the bottom surface of the aquarium 100. The seedling plate 104 has a seedling frame 104a and a seedling thread 104b. The seedling frame 104a is formed in a rectangular frame shape. The seedling thread 104b constitutes the inside of the seedling plate 104 by being stretched over the seedling frame 104a. Wakame seaweed S spores S0 are attached to the seedling thread 104b. An air pump (not shown) for aerating the water in the water tank 100 is arranged in the water tank 100.

The lighting device main body 10a was arranged in three of the six compartments. The lighting device main body 10a is arranged between the rod 102 and the seedling plate 104. In the lighting device main body 10a, the first cap 22 is arranged toward the seedling plate 104. The optical axis of the lighting device 10 is along the vertical direction. The distance between the lighting device main body 10a and the seedling plate 104 is 5 cm. The lighting device main body 10a is suspended from the rod 102 via the wire 103 in the same manner as the seedling plate 104. Hereinafter, the section in which the lighting device 10 is arranged is referred to as "experimental section P1", and the section in which the lighting device 10 is not arranged is referred to as "comparison section P2". In the experimental plot P1, the seedling plate 104 and the lighting device main body 10a are suspended from the rod 102 via the ring 50 in addition to the wire 103.
The fluorescent lamp 110 is arranged at a position 95 cm above the water tank 100. When the fluorescent lamp 110 is lit, it irradiates all the sections in the water tank 100 with light.

This experiment was carried out to confirm the growth promoting effect of the spore body S0 of Wakame seaweed S by the lighting device main body 10a using the above-mentioned experimental equipment. Specifically, this experiment was conducted under the following conditions.
From 6:00 am to 16:00 pm, both the experimental group P1 and the comparative group P2 were irradiated with the light of the fluorescent lamp 110. From 16:00 pm to 6:00 am, the experimental group P1 was irradiated with blue light using the lighting device main body 10a. The comparative group P2 was set to a dark state in which no light was irradiated during the time period from 16:00 pm to 6:00 am.
This experiment was conducted for 21 days. After 0, 6 and 18 days from the start of the experiment, 10 ml of Porphyran conco (trade name) manufactured by Daiichi Seisakusho Co., Ltd. was added to the water tank 100 as a nutritional supplement for the spore capsule S0. After 0, 7, 14, and 21 days from the start of the experiment, 30 or more spores S0 were exploited from the experimental group P1 and the comparative group P2, respectively. For each acquisition date, the leaf area of the spore body S0 in the experimental group P1 and the leaf area of the spore body S0 in the comparative group P2 were measured.
A method for measuring the leaf area of the spore body S0 will be described.
Exploited spores S0 were photographed using a biological microscope. The leaf area of each spore body S0 was measured by analyzing the image of the spore body S0 acquired using the image analysis software ImageJ. The Wilcoxon test was performed on the leaf area of each spore body S0, and the leaf area of the spore body S0 on each measurement day was used.

The rate of increase in the leaf area of the spore body S0 is the growth rate of the spore body S0. Hereinafter, the results of evaluating the growth promoting effect of the spores S0 by the illuminating device main body 10a by comparing the growth rates of the spores S0 between the experimental group P1 and the comparative group P2 will be described.
FIG. 6 is a graph comparing the growth rates of wakame seaweed S spores S0 between the experimental group P1 and the comparative group P2. In FIG. 6, the vertical axis is the leaf area [mm ² ] of the spore body S0, and the horizontal axis is the experimental date.
As can be read from the graph of FIG. 6, the area of the spore body S0 increased as the number of days passed in both the experimental group P1 and the comparative group P2. However, from 7 days after the start of the experiment, the leaf area of the spore body S0 in the experimental group P1 was larger than the leaf area of the spore body S0 in the comparative group P2. As the number of days passed, 14 days and 21 days after the start of the experiment, the leaf area value of the spore body S0 gradually opened in the experimental group P1 and the comparative group P2.
From the above, it can be said that the light irradiation by the lighting device main body 10a has the effect of promoting the growth of the spore body S0 of the wakame seaweed S.

According to the present embodiment described above, the following actions and effects can be obtained.
The aquaculture device 1 includes a lighting device 10 capable of controlling lighting. According to this configuration, when the photon density on the surface of wakame seaweed S is less than a predetermined photon density only by sunlight, for example, in the evening, at night, or in cloudy weather during the day, the aquaculture device 1 lights the lighting device 10. Then, the wakame seaweed S can be irradiated with light for a predetermined time. As a result, the aquaculture apparatus 1 can set the surface of the wakame seaweed S to a predetermined photon density. Therefore, the aquaculture apparatus 1 can sufficiently cause the wakame seaweed S to perform photosynthesis, and thus can promote the growth of the wakame seaweed S.
The aquaculture device 1 includes a lighting device 10 that can control the extinguishing of lights. According to this configuration, the aquaculture apparatus 1 can turn off the lighting apparatus 10 when the photon density on the surface of the wakame seaweed S is equal to or higher than a predetermined photon density only by sunlight, for example, when the weather is fine in the daytime. Therefore, it is possible to reduce the cost of electricity and the like required for lighting the lighting device 10.
Therefore, the growth of wakame seaweed S can be promoted at low cost.
The aquaculture apparatus 1 includes a holding member 2 that holds the lighting apparatus main body 10a at a predetermined position in water. The lighting of the lighting device main body 10a is directed to the upper side of the water. When the lighting device main body 10a is arranged above the water surface, the light emitted from the light source 11 of the lighting device main body 10a toward the wakame seaweed S is diffusely reflected on the water surface. On the other hand, the aquaculture apparatus 1 can irradiate the wakame seaweed S with the light of the lighting apparatus main body 10a from the water. As a result, the aquaculture apparatus 1 can prevent the light emitted from the light source 11 of the lighting apparatus main body 10a toward the wakame seaweed S from being diffusely reflected on the water surface. Therefore, the aquaculture apparatus 1 can increase the amount of light irradiated to the wakame seaweed S as compared with the case where the lighting apparatus main body 10a is arranged above the water surface. Therefore, since the aquaculture apparatus 1 can increase the nutrients produced by the wakame seaweed S by photosynthesis, the growth of the wakame seaweed S can be further promoted.

The lighting device main body 10a is held below the wakame seaweed S by the holding member 2. According to this configuration, the aquaculture apparatus 1 can irradiate the wakame seaweed S with light from below. As a result, the aquaculture apparatus 1 can irradiate the lower part of the wakame seaweed S, which is hard to be exposed to sunlight, with light. Therefore, the aquaculture apparatus 1 can increase the nutrients produced by the wakame seaweed S by photosynthesis as compared with the case where the lighting apparatus main body 10a is held above the wakame seaweed S. Therefore, the aquaculture apparatus 1 can further promote the growth of wakame seaweed S.

The aquatic culture apparatus 1 includes a timer 41 for measuring time, and a control unit 40 for acquiring time information from the timer 41 and controlling lighting and extinguishing of the lighting device 10 in response to the time information acquired from the timer 41. , Is equipped. According to this configuration, the aquaculture apparatus 1 can turn on the lighting apparatus 10 at a time zone when the photon density on the surface of the wakame seaweed S is less than a predetermined photon density only by sunlight. As a result, even in the time zone when the photon density on the surface of the wakame seaweed S is less than the predetermined photon density, the aquaculture apparatus 1 can sufficiently irradiate the wakame seaweed S with light to cause the wakame seaweed S to sufficiently photosynthesize. can. Therefore, the aquaculture apparatus 1 can promote the growth of wakame seaweed S. Further, the aquaculture apparatus 1 can turn off the lighting apparatus 10 during a time zone in which the photon density on the surface of the wakame seaweed S becomes equal to or higher than a predetermined photon density only by sunlight. Therefore, it is possible to reduce the cost of electricity and the like required for lighting the lighting device 10. Therefore, the growth of wakame seaweed S can be promoted at low cost.
The aquaculture apparatus 1 can automatically switch between turning on and off the lighting device 10 in response to the time information acquired from the timer. As a result, it is possible to reduce the labor as compared with the case where the producer manually turns on and off the lighting device 10.

It is desirable that the aquaculture apparatus 1 includes a weight 3 attached to the lighting apparatus main body 10a. The gravity acting on the lighting device 10 and the weight 3 is larger than the buoyancy acting on the lighting device 10 and the weight 3. According to this configuration, the gravity acting on the weight 3 can resist the buoyancy acting on the lighting device 10. As a result, the weight 3 can sink the lighting device main body 10a below the wakame seaweed S, so that the lighting device main body 10a can be reliably held below the wakame seaweed S. Therefore, the aquaculture apparatus 1 can increase the nutrients produced by the wakame seaweed S by photosynthesis as compared with the case where the lighting apparatus main body 10a is held above the wakame seaweed S. Therefore, the aquaculture apparatus 1 can more reliably and further promote the growth of wakame seaweed S.
Since the weight 3 can sink the lighting device main body 10a below the wakame seaweed S, the hanging member 6 can be made to hold the lighting device main body 10a by the holding member 2 in a state of being stretched in the vertical direction. Therefore, the aquaculture device 1 can prevent the lighting device main body 10a from deviating from a predetermined position in the water due to a collision with a water flow or another object. As a result, the aquaculture apparatus 1 can suppress the light emitted from the lighting apparatus main body 10a toward the wakame seaweed S from deviating from the wakame seaweed S. Therefore, the aquaculture apparatus 1 can suppress a decrease in the amount of light irradiated to the wakame seaweed S. Therefore, the aquaculture apparatus 1 can suppress a decrease in nutrients produced by photosynthesis of wakame seaweed S. Therefore, the aquaculture apparatus 1 can more reliably promote the growth of wakame seaweed S.
The weight 3 can sink the lighting device main body 10a below the wakame seaweed S. Therefore, even if the lighting device 10 rotates around the holding member 2, the aquaculture device 1 can hold the lighting device main body 10a below the wakame seaweed S by the gravity acting on the weight 3. As a result, it is possible to prevent the light emitted from the lighting device main body 10a toward the wakame seaweed S from deviating from the wakame seaweed S. Therefore, the aquaculture apparatus 1 can suppress a decrease in the amount of light irradiated to the wakame seaweed S.
The weight 3 may not be attached to the lighting device main body 10a via the ring 50 and the weight suspending member 7. The weight 3 may be directly attached to the lighting device main body 10a. The weight 3 may be attached to the hanging member 6 instead of the lighting device main body 10a.
If the aquaculture device 1 can sink the lighting device main body 10a without the weight 3 (if the lighting device 10 itself including the lighting device main body 10a sinks), the weight 3 is used. It has the same effect as when it is prepared.

The method for growing wakame seaweed S includes a lighting step of lighting the lighting device 10 when the photon density on the surface of wakame seaweed S is less than a predetermined photon density. According to this configuration, when the photon density on the surface of the wakame seaweed S is less than a predetermined photon density only by sunlight, the aquaculture apparatus 1 can turn on the lighting device 10 to irradiate the wakame seaweed S with light. As a result, the aquaculture apparatus 1 can make the surface of the wakame seaweed S having a predetermined photon density or higher. Therefore, the aquaculture apparatus 1 can sufficiently cause the wakame seaweed S to perform photosynthesis, and thus can promote the growth of the wakame seaweed S.
The method for growing wakame seaweed S includes a step of turning off the lighting device 10 when the photon density on the surface of wakame seaweed S is equal to or higher than a predetermined photon density with only sunlight. According to this configuration, the aquaculture apparatus 1 can turn off the lighting apparatus 10 when the photon density on the surface of the wakame seaweed S is equal to or higher than a predetermined photon density only by sunlight. Therefore, it is possible to reduce the cost of electricity and the like required for lighting the lighting device 10.
Therefore, the growth of wakame seaweed S can be promoted at low cost.

The lighting device 10 includes a housing 20 that houses the light source 11 inside, and a hanging member 6 that connects the holding member 2 that holds the housing 20 at a predetermined position in water and the housing 20. .. The lighting device 10 is installed in water and irradiates the upper side of the water. According to this configuration, the housing 20 is held in a predetermined position in water by the holding member 2. As a result, the lighting device 10 can irradiate the wakame seaweed S with light from the water, so that the light emitted toward the wakame seaweed S can be prevented from being diffusely reflected on the water surface. Therefore, the lighting device 10 can increase the amount of light irradiated to the wakame seaweed S as compared with the case where the housing 20 is held above the water surface. Therefore, since the lighting device 10 can increase the nutrients produced by the wakame seaweed S by photosynthesis, the growth of the wakame seaweed S can be further promoted.
Further, the lighting device 10 can suppress exposure to strong winds and collision with flying objects, as compared with the case where the housing 20 is arranged on the water surface or above the water surface. This makes it possible to prevent the lighting device 10 from being damaged.
The lighting device 10 can irradiate the wakame seaweed S with light from underwater. Generally, algae such as wakame seaweed S extend toward a light source. Therefore, the lighting device 10 can grow the wakame seaweed S downward from the water surface. As a result, the lighting device 10 can suppress the growth of the wakame seaweed S upward from the water surface. Therefore, the upper part of the wakame seaweed S farm can be used for entertainment. It is also easy to grasp the state of the fish swimming around the wakame seaweed S from the surface of the water.

The holding member 2 is arranged at a predetermined position from the water surface. The hanging member 6 is connected to the holding member 2 and extends downward to suspend the housing 20. According to this configuration, the housing 20 is suspended by the suspending member 6 connected to the holding member 2. Therefore, the housing 20 is always located on a constant arc with the rope 5 (holding member 2) as an axis even if it is affected by a wave, and the irradiation direction is directed to that axis. Therefore, the lighting device 10 is a wakame seaweed. The wakame seaweed S can be reliably irradiated with light without being separated from the S.
The hanging member 6 is preferably a metal wire having a predetermined rigidity. In this case, the lighting device 10 can further suppress the bending of the hanging member 6 due to a water flow or the like. As a result, it is possible to prevent the hanging member 6 from being deformed due to a water flow or a collision with another object, so that it is possible to prevent the light emitted from the lighting device main body 10a toward the wakame seaweed S from deviating from the wakame seaweed S. Therefore, the lighting device 10 can suppress a decrease in the amount of light irradiated to the wakame seaweed S. Therefore, the lighting device 10 can suppress a decrease in nutrients produced by photosynthesis of wakame seaweed S. Therefore, the lighting device 10 can more reliably promote the growth of the wakame seaweed S.

The aquaculture device 1 can hold the lighting device main body 10a by an existing rope 5 used for general wakame seaweed farming and a hanging member 6 having a simple structure. As a result, the hanging member 6 can be easily manufactured, and the manufacturing cost of the rope 5 and the hanging member 6 can be reduced. Therefore, the productivity of the aquaculture apparatus 1 can be improved, and the manufacturing cost of the aquaculture apparatus 1 can be reduced.

Two suspension members 6 are arranged symmetrically about the optical axis of the light source 11. According to this configuration, the suspending member 6 can hold the illuminating device main body 10a at two locations symmetrically arranged about the optical axis of the light source 11. As a result, the hanging member 6 can stably hold the illuminating device main body 10a. Therefore, the hanging member 6 can prevent the light emitted from the lighting device main body 10a toward the wakame seaweed S from deviating from the seaweed seaweed S. Therefore, the lighting device 10 can suppress a decrease in the amount of light irradiated to the wakame seaweed S. Therefore, the lighting device 10 can suppress a decrease in nutrients produced by photosynthesis of wakame seaweed S. Therefore, the lighting device 10 can more reliably promote the growth of the wakame seaweed S.

The lighting device 10 includes three second connection portions 53. The upper ends of the three weight suspending members 7 to which the weight 3 is connected to the lower ends are connected to the three second connecting portions 53, respectively. According to this configuration, the weight 3 is suspended by three weight suspending members 7. As a result, the weight 3 is suspended below the lighting device main body 10a in a stable state, so that it is possible to prevent the weight 3 and the lighting device main body 10a from being displaced from each other. Therefore, the lighting device main body 10a is held in a stable state below the wakame seaweed S by the gravity acting on the weight 3. Therefore, it is possible to prevent the light emitted from the lighting device main body 10a toward the wakame seaweed S from deviating from the wakame seaweed S.

Three second connection portions 53 are arranged around the optical axis of the light source 11 at intervals of 120 degrees. The lengths of the three weight suspension members 7 are equal to each other. According to this configuration, the weight 3 that pulls the illuminating device main body 10a downward can be arranged at a position that overlaps with the illuminating device main body 10a when viewed from the vertical direction. As a result, the holding member 2 can stably hold the lighting device 10. Therefore, the lighting device 10 can suppress the light emitted from the lighting device main body 10a toward the wakame seaweed S from deviating from the wakame seaweed S. Therefore, the lighting device 10 can suppress a decrease in the amount of light irradiated to the wakame seaweed S. Therefore, the lighting device 10 can suppress a decrease in nutrients produced by photosynthesis of wakame seaweed S. Therefore, the lighting device 10 can more reliably promote the growth of the wakame seaweed S.

The wavelength of the light emitted from the light source 11 is 400 nm or more and 500 nm or less. According to this configuration, the lighting device 10 can irradiate the wakame seaweed S with blue light. Blue light has the effect of activating the production of hormones that activate the growth of algae. Therefore, the lighting device 10 can promote the growth of the wakame seaweed S as compared with the case where the wakame seaweed S is irradiated with light other than blue. Blue light has the effect of eliminating pests. Therefore, the lighting device 10 can suppress the growth of wakame seaweed S from being hindered by pests. Therefore, the lighting device 10 can further promote the growth of wakame seaweed S.

In the first embodiment described above, the case where the aquaculture device 1 includes one rope 5 and one lighting device 10 has been described, but the present invention is not limited to this. The aquaculture device 1 may include one rope 5 and two or more lighting devices 10 suspended from one rope 5. The aquaculture apparatus 1 may include two or more ropes 5, and may include two or more lighting devices 10 suspended from each rope 5. When the aquaculture device 1 includes a plurality of lighting devices 10, a large amount of wakame seaweed S can be grown as compared with the case where the aquaculture device 1 includes one lighting device 10. In addition, the aquaculture device 1 provided with the plurality of lighting devices 10 can also be used as lighting for illumination to illuminate the surface of the water.

In the first embodiment described above, the case where the lighting device 10 includes five connecting portions 52 and 53 has been described, but the present invention is not limited to this. The number of connecting portions 52 and 53 and the positions of the connecting portions 52 and 53 in the ring body 51 can be appropriately selected.

In the first embodiment described above, the suspending member 6 is connected to two first connecting portions 52 of the five connecting portions 52 and 53 arranged symmetrically with respect to the optical axis when viewed from the axial direction. .. It has been explained that the weight suspension member 7 is connected to the three second connecting portions 53 arranged at intervals of 120 degrees around the optical axis when viewed from the axial direction, but the present invention is not limited to this. It suffices that at least one of the hanging member 6 and the weight hanging member 7 can be connected to any of the five connecting portions 52, 53. In this case, the user of the lighting device 10 can select whether or not to connect the hanging member 6 or the weight hanging member 7 to the connecting portions 52 and 53, depending on the situation.

(Second Embodiment)
Hereinafter, the aquaculture apparatus 1A according to the second embodiment of the present invention will be described with reference to the drawings. Of the configurations of the second embodiment, the same configurations as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate.
FIG. 7 is a perspective view of the aquaculture apparatus 1A.
The aquaculture apparatus 1A shown in FIG. 7 is used for growing wakame seaweed S in deep water. The aquaculture device 1A includes a holding member 2 and a lighting device 10.

The holding member 2 has a plurality of ropes 5. The plurality of ropes 5 extend in the horizontal direction and are arranged apart from each other in the vertical direction. Both ends of the plurality of ropes 5 in the horizontal direction are connected to and supported by rod-shaped members (not shown) extending in the vertical direction. The plurality of ropes 5 are arranged on a virtual plane along the vertical direction. Wakame seaweed S is rooted in each of the plurality of ropes 5 at equal intervals in the horizontal direction.
At an intermediate position between the two ropes 5 adjacent to each other in the vertical direction, a plurality of lighting devices 10 arranged in a horizontal row are arranged. The plurality of lighting devices 10 are arranged on a virtual plane along the vertical direction. The plurality of lighting devices 10 are arranged at equal intervals in the horizontal direction and the vertical direction.

The lighting device 10 has a lighting device main body 10a and a support portion 61. Each illuminating device main body 10a is provided at the same position in the horizontal direction as the wakame seaweed S. The illuminating device main body 10a is all arranged with the first cap 22 facing upward.
By doing so, the lighting device 10 can illuminate upward, and can grow wakame seaweed S even in a place where the water depth is deep and sunlight does not reach much.
Further, the lighting device 10 may also include a light source 11 on the side of the second cap 23 arranged toward the lower side of the lighting device main body 10a. By doing so, the lighting device 10 can also illuminate downward, can realize lighting in both the upper and lower directions with respect to the wakame seaweed S, and can grow the wakame seaweed S more effectively.

The support portion 61 is a wire extending in the vertical direction. The support portion 61 is formed of, for example, a metal material. Four support portions 61 are provided for each lighting device main body 10a. Two of the four support portions 61 corresponding to one illuminating device main body 10a, two support portions 61 (hanging members 61a) extend downward from the rope 5 above the illuminating device main body 10a and are the first connection portions. It is connected to 52 or the second connection portion 53. The remaining two support portions 61 (lower support member 61b) extend upward from the rope 5 below the illuminating device main body 10a and are connected to the first connection portion 52 or the second connection portion 53. In this way, each illuminating device main body 10a is held between two ropes 5 which are separated in the vertical direction. The lower support member 61b may be omitted. By omitting the lower support member 61b, it is possible to simplify the work of attaching and detaching the lighting device to the rope 5.

The above-mentioned aquaculture apparatus 1A is submerged in deep water with the wakame seaweed S attached to the rope 5. After that, when the wakame seaweed S grows sufficiently and reaches the harvesting season, the aquaculture apparatus 1A is pulled up. As a result, according to the aquaculture apparatus 1A of the present embodiment, the wakame seaweed S grown in deep water can be pulled up and harvested at once. Therefore, even when a large amount of wakame seaweed S is grown in deep water, all the wakame seaweed S can be easily harvested and the labor can be reduced.

In the second embodiment described above, the case where the lighting device 10 is used for growing seaweed such as wakame seaweed S in deep water has been described, but the present invention is not limited to this.

(Third Embodiment)
Hereinafter, the aquaculture apparatus 1B according to the third embodiment of the present invention will be described with reference to the drawings. Of the configurations of the third embodiment, the same configurations as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate.
FIG. 8 is a side view of the aquaculture apparatus 1B.
As shown in FIG. 8, the holding member 2 in the aquaculture apparatus 1B is a rope 5 formed by twisting two wire rods 5a.

FIG. 9 is a plan view of the lighting device main body 10a in the aquaculture device 1B.
As shown in FIGS. 9 and 8, six connecting portions 52 and 53 are provided on the outer peripheral edge portion 51b of the ring main body 51. Of the six connecting portions 52 and 53, four connecting portions 52 are arranged around the optical axis at intervals of 90 degrees when viewed from the axial direction. The four connecting portions 52 function as the first connecting portion 52. Of the six connecting portions 52, 53, the two connecting portions 53 other than the four first connecting portions 52 function as the second connecting portion 53. The weight hanging member 7 connected to the second connecting portion 53 and the weight 3 suspended from the weight hanging member 7 are not shown.

The hanging member 6 is a member that extends in one direction. The hanging member 6 is formed by adhering two wires 8 having different lengths. Both ends of each wire 8 are bent. The two wires 8 form a hanging member 6 by adhering the wire bodies 8a extending in one direction to each other. The two wires 8 are adhered so that one ends of the wires 8 overlap each other.
The hanging member 6 has a hanging member main body 6a, an insertion portion 6b, and a hook portion 6c.

FIG. 10 is a side view of the aquaculture apparatus 1B.
The hanging member main body 6a extends from the holding member 2 toward the connecting portions 52 and 53. As shown in FIG. 10, the angle formed by the two hanging member main bodies 6a in the side view can be changed.

The insertion portion 6b is provided at an end portion of the hanging member main body 6a on the holding member 2 side and an intermediate portion in the extending direction of the hanging member main body 6a. The insertion portion 6b is inserted into the gap between the two wire rods 5a constituting the holding member 2. In the example of FIG. 8, the insertion portion 6b provided at the end on the suspension member main body 6a side on the holding member 2 side is inserted into the holding member 2. A barb for preventing disconnection is provided at the tip of the insertion portion 6b.

11 and 12 are side views of the aquaculture apparatus 1B.
As shown in FIG. 11, the insertion portion 6b provided in the extending direction intermediate portion of the hanging member main body 6a may be inserted into the holding member 2. As shown in FIG. 12, the insertion portion 6b may be inserted into the holding member 2 after the angle formed by the two hanging member main bodies 6a is changed in the side view.

FIG. 13 is a perspective view of the vicinity of the hook portion 6c in the aquaculture apparatus 1B.
As shown in FIGS. 8, 9 and 13, at the end of the hanging member main body 6a on the housing 20 side, two relay portions 6d extending in a direction orthogonal to the longitudinal direction of the hanging member main body 6a are provided. It is provided. The two relay portions 6d extend in opposite directions along the same virtual straight line. A hook portion 6c is provided at the end of the relay portion 6d on the opposite side of the hanging member main body 6a. Two hook portions 6c are provided for each hanging member 6. Each hook portion 6c is formed in an L shape when viewed from the longitudinal direction of the relay portion 6d. The hook portion 6c is hooked on the first connection portion 52.

According to the present embodiment described above, the following actions and effects can be obtained.
The first connecting portion 52 is formed in an annular shape. One hanging member 6 has two hook portions 6c that are hooked on the two first connecting portions 52, respectively. According to this configuration, the hook portion 6c is hooked on each of the two first connecting portions 52, so that the one hanging member 6 is connected to the first connecting portion 52 at two points. Therefore, the lighting device main body 10a can be supported by the hanging member 6 at these two connecting points, so that the rotation of the hanging member 6 about the longitudinal direction can be suppressed. Further, since the hanging member 6 rotates with respect to the lighting device main body 10a about the line connecting these two connecting points, the angle formed by the two hanging members 6 can be adjusted in the side view. Thereby, the lighting device 10 can adjust the distance between the holding member 2 and the lighting device main body 10a. Thereby, the lighting device 10 can adjust the distance between the wakame seaweed S rooted in the holding member 2 and the light source 11 provided in the lighting device main body 10a. Therefore, the lighting device 10 can adjust the photon density on the surface of the wakame seaweed S.

FIG. 14 is a perspective view of the vicinity of the hook portion 6c in the aquaculture apparatus 1B.
The hook portion 6c of the hanging member 6 is formed in an L shape. According to this configuration, as shown in FIG. 14, even if the illuminating device main body 10a is moved above the holding member 2 by the water flow, the illuminating device 10 is caught by the first connecting portion 52 and the hook portion 6c. It can be suppressed from being released. As a result, the lighting device 10 can maintain a state in which the holding member 2 and the first connecting portion 52 are connected by the hanging member 6. Therefore, the illuminating device 10 can maintain the state in which the illuminating device main body 10a is held by the holding member 2.

The hanging member 6 has an insertion portion 6b that is inserted into a gap between the wire rods 5a constituting the holding member 2. According to this configuration, the hanging member 6 is firmly connected to the holding member 2 by inserting the insertion portion 6b into the gap between the wire rods 5a. Therefore, the lighting device 10 can prevent, for example, the suspending member 6 from coming off from the holding member 2 due to a collision with a water flow or another object.
The insertion portion 6b is provided at an end portion of the hanging member main body 6a on the holding member 2 side and an intermediate portion in the extending direction of the hanging member main body 6a. According to this configuration, the lighting device 10 can adjust the distance between the holding member 2 and the lighting device main body 10a by selecting the insertion portion 6b used for connecting to the holding member 2. Thereby, the lighting device 10 can adjust the distance between the wakame seaweed S rooted in the holding member 2 and the light source 11 provided in the lighting device main body 10a. Therefore, the lighting device 10 can adjust the photon density on the surface of the wakame seaweed S. To adjust the distance between the lighting device main body 10a and the holding member 2 by changing the insertion portion 6b, for example, the distance between the lighting device main body 10a and the holding member 2 is adjusted by adjusting the angle formed by the hanging members 6 in the side view. It is done when you cannot.

In the third embodiment described above, the case where the holding member 2 is formed by twisting two wire rods 5a has been described, but the present invention is not limited to this. The number of wire rods 5a constituting the holding member 2 can be appropriately changed. The holding member 2 may be formed by twisting, for example, three wire rods 5a.

In the third embodiment described above, the insertion portion 6b is provided at the end portion of the hanging member main body 6a on the holding member 2 side and the extending direction intermediate portion of the hanging member main body 6a. Not limited to this. The position and number of the insertion portions 6b can be changed as appropriate.

In each of the above-described embodiments, the case where the seaweed is used for growing seaweed such as wakame seaweed S has been described, but the present invention is not limited thereto. The illuminating device 10 may be used as a guidepost for diving divers as an underwater light fixed in water. As a result, the diver can grasp the position of the diver by using the light of the lighting device 10 as a mark when diving, for example, at night. In this case, for example, by changing the color of light for each lighting device 10, the diver can grasp his / her position in more detail from the difference in the color of light of each lighting device 10. Further, since the lighting device 10 can irradiate the water surface with light from the water bottom side, the diver can grasp the position of the diver from the water surface by attaching (hanging) the lighting device 10. Further, in the world of entertainment such as fountain shows and underwater illuminations, the use of the lighting device 10 enables effective lighting for spectators on the ground. In addition, by using the lighting device 10, it becomes easier to grasp the state of the fish from the water, and the catch increases.

In each of the above-described embodiments, the case where one lighting device 10 is provided with a plurality of hanging members 6 has been described, but the present invention is not limited thereto. For example, when the holding member 2 is not a rope 5 but a float buoy (for example, in the case of a spherical float buoy), one hanging member 6 can be used to hold the lighting device. In this case, by configuring the lighting device main body 10a so that the optical axis and the position of the suspending member 6 are substantially aligned with each other, it is possible to constantly irradiate the direction of the float buoy without being affected by the wave. In this case, for example, it may be used as an underwater light fixed in water.

In each of the above-described embodiments, the hanging member 6 and the housing 20 are connected by the annular connecting portions 52 and 53, but the present invention is not limited to such an embodiment. The hanging member 6 may be directly connected to the housing 20 (for example, in the first embodiment, the hanging member 6 may be directly connected to the outer peripheral surface 21a of the tubular portion 21). Even in such a form, the same effect can be obtained.

In each of the above-described embodiments, the case where the timer 41 is housed inside the housing 20 has been described, but the present invention is not limited to this. The timer 41 may be arranged outside the housing 20, for example. When the timer 41 is arranged outside the housing 20, the timer 41 includes a transmission unit (not shown) for transmitting information on the measured time. The control unit 40 includes a reception unit (not shown) for acquiring information on the time transmitted from the timer 41. When the timer 41 is arranged outside the housing 20, the aquaculture device 1 may have one timer 41 and a plurality of lighting devices 10. In this case, one timer 41 may transmit time information to the control units 40 of the plurality of lighting devices 10.

In each of the above-described embodiments, the case where the aquaculture apparatus 1, 1A, 1B includes the timer 41 has been described as an example, but the present invention is not limited to this. For example, the aquaculture apparatus 1, 1A, 1B may include an optical sensor (not shown) for detecting the photon density on the surface of the wakame seaweed S instead of the timer 41.
In this case, the aquaculture apparatus 1, 1A, 1B can detect the photon density on the surface of the wakame seaweed S by the optical sensor. The control unit 40 acquires information on the photon density on the surface of the wakame seaweed S from the optical sensor, and controls the lighting of the lighting device 10 according to the photon density on the surface of the wakame seaweed S.
The aquaculture apparatus 1, 1A, 1B may include an optical sensor for detecting the photon density in addition to the timer 41.

In each of the above-described embodiments, the case where the lighting device 10 adjusts the photon density on the surface of the wakame seaweed S by controlling lighting and extinguishing has been described as an example, but the present invention is not limited to this. The lighting device 10 may adjust the photon density around the lighting device main body 10a by controlling lighting and extinguishing. In this case, the optical sensor in the above-described modification detects the photon density around the illuminating device main body 10a. The “periphery of the lighting device main body 10a” is, for example, a virtual sphere having a radius of 1 m centered on the light source 11 and is in the range of the directivity angle of the light source 11. Further, the lighting device 10 may adjust the photon density on both the surface of the wakame seaweed S and the periphery of the lighting device main body 10a by controlling the lighting and extinguishing. In this case, the optical sensor detects the photon density both on the surface of the wakame seaweed S and around the illuminator body 10a.

In each of the above-described embodiments, the photon density has been described as an example as corresponding to the "brightness" of the claims, but the present invention is not limited to this. What corresponds to the "brightness" of the claim may be, for example, illuminance or the like.

In each of the above-described embodiments, the case where the aquaculture apparatus 1, 1A, 1B is used for breeding wakame seaweed S has been described, but the present invention is not limited to this. The aquaculture devices 1, 1A and 1B may be used for growing seaweeds other than wakame seaweed S, such as kelp. Aquaculture devices 1, 1A, 1B may be used to grow algae in freshwater. The aquaculture devices 1, 1A and 1B may be used to irradiate fish and shellfish with light to prevent insects from flocking to the fish and shellfish when growing fish and shellfish such as scallops.

In each of the above-described embodiments, the case where the wavelength of the light emitted from the light source 11 is 400 nm or more and 500 nm or less has been described, but the present invention is not limited to this. The wavelength of the light emitted from the light source 11 may be less than 400 nm or longer than 500 nm. The wavelength of the light emitted from the light source 11 may be appropriately changed. In this case, the most appropriate wavelength for promoting the growth of the algae can be selected according to the algae to be grown.

In each of the above-described embodiments, the case where the lighting device 10 is used for growing seaweed such as wakame seaweed S has been described, but the present invention is not limited to this. The illuminator 10 may be carried by a diving diver. In this case, the diver can illuminate the water for better visibility.

In addition, it is possible to appropriately replace the components in the above-described embodiments with well-known components without departing from the spirit of the present invention, and the above-described embodiments may be combined as appropriate.

1,1A, 1B ... Aquaculture equipment 2 ... Holding member 3 ... Weight 5a ... Wire rod 6 ... Hanging member 6a ... Hanging member main body 6b ... Insertion part 6c ... Hook part 7 ... Weight hanging member 10 ... Lighting device (underwater) Lighting device)
10a ... Lighting device body (underwater lighting device body)
11 ... Light source 20 ... Housing 40 ... Control unit 41 ... Timer 52 ... First connection unit (connection unit)
53 ... Second connection part (connection part)
61a ... Suspended member S ... Wakame seaweed S0 ... Spores

Claims (12)

Underwater illuminator body and underwater illuminator with hanging members,
A holding member that holds the underwater illuminating device main body at a predetermined position in the water via the hanging member is provided.
The underwater aquaculture device is characterized in that the brightness of at least one of the periphery of the underwater lighting device main body and the aquaculture object can be adjusted by controlling the lighting and extinguishing of the underwater lighting device toward the upper side of the water. The aquaculture apparatus according to claim 1, wherein the underwater lighting device main body is held below the aquaculture object by the holding member. A timer to measure time and
A control unit that acquires time information from the timer and controls turning on and off of the underwater lighting device in response to the time information.
The aquaculture apparatus according to claim 1 or 2, wherein the aquaculture apparatus is provided. An optical sensor that detects the brightness and
A control unit that acquires the brightness information from the optical sensor and controls the lighting and extinguishing of the underwater lighting device in response to the brightness information.
The aquaculture apparatus according to any one of claims 1 to 3, wherein the aquaculture apparatus is provided. With a weight attached to the underwater luminaire
The aquaculture apparatus according to any one of claims 1 to 4, wherein the gravity acting on the underwater lighting device and the weight is larger than the buoyancy acting on the underwater lighting device and the weight. A method for growing an aquaculture object using the aquaculture apparatus according to any one of claims 1 to 5.
A lighting process for lighting the underwater lighting device when the brightness is less than a predetermined brightness, and
A turn-off step of turning off the underwater lighting device when the brightness is equal to or higher than the predetermined brightness.
A method for growing aquaculture objects. A light source that irradiates light,
A housing that houses the light source inside,
A holding member that holds the housing in a predetermined position in water and a hanging member that connects the housing to the housing.
An underwater lighting device that is installed underwater and illuminates the upper side of the water. The holding member is arranged at a predetermined position from the water surface and
The underwater lighting device according to claim 7, wherein the suspending member is connected to the holding member and extends downward to suspend the housing. The holding member is formed by twisting a plurality of wires.
The hanging member is
A hanging member main body extending from the holding member toward the housing,
It has an insertion portion that is inserted into the gap between the plurality of wires.
The underwater lighting device according to claim 8, wherein the insertion portions are provided at a plurality of locations of the hanging member main body. A connection portion for connecting the hanging member and the housing is provided.
The connection portion is formed in an annular shape and is formed in an annular shape.
The hanging member has a hook portion that is hooked on the connection portion.
The underwater lighting device according to any one of claims 7 to 9, wherein the hook portion is formed in an L shape. A plurality of the connection portions are provided.
10. A aspect of claim 10, wherein at least one of a weight hanging member to which a weight is connected to a lower end and the hanging member can be connected to any of the plurality of connecting portions. The underwater lighting device described in. The underwater lighting device according to any one of claims 7 to 11, wherein the wavelength of the light emitted from the light source is 400 nm or more and 500 nm or less.

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