JPH08107733A - Device for catching plankton or the like - Google Patents

Abstract

PURPOSE: To provide a device for catching plankton capable of surely collecting a large amount of plankton without requiring labor of an operator, etc., in operation, by simple constitution at a low cost. CONSTITUTION: This device 10 for catching plankton, etc., is provided by installing window holes 14 on the peripheral wall of a hollow case 12, arranging a pump 16 and a light source 18 in the interior of the hollow case 12, boring a hose hole 24 through the hollow case, connecting one end of a hose 26 to the delivery side of the pump 16, laying the hollow case 12 in the sea and catching plankton, etc., by the pump 16 while emitting light from the light source 18 at night. Plankton gathers around the light source projecting light from the window holes 14 and the plankton is introduced into the case and surely sucked and caught in a large amount by the pump.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for collecting plankton or the like which is important in fisheries science as a bait for fish and the like.

[0002]

2. Description of the Related Art Conventionally, plankton, which are living organisms that float on the surface of water or in water, include larvae of many animals such as crustaceans and shellfish, and various species such as diatoms, flagellates, cyanobacteria, and green algae. This is important as a bait for fish and has a great influence on the ecology of the fish itself.
It is also understood that it greatly affects life and death by examining the inside of whales and other bodies that stop near the extreme points. Such plankton are generally small in size and vary in length from several millimeters to several microns.

[0003]

[Problems to be Solved by the Invention] As food culture has become rich in recent years and the culture and aquaculture industry has become prosperous, it is a major problem to secure food for fish and the like at the stage of aquaculture. In particular, Punlankton, which is indispensable as a fish feed during the growth process, has been proposed as a method of artificially hatching it in the laboratory, but it is extremely expensive and has not been practically used in actual aquaculture sites. . Further, in terms of quality, it is difficult to obtain a natural plankton that is superior to that of natural plankton, and the appearance of a device capable of securing a large amount of such a natural plankton has been desired.

The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is an extremely simple structure, low cost, and no labor of an operator or the like at the time of operation, and a reliable large amount. Another object of the present invention is to provide a device for collecting plankton and the like that can collect the plankton and the like.

[0005]

To achieve the above object, according to the present invention, a window hole 14 is provided in a peripheral wall of a hollow case 12, and a pump 16 and a light source 18 are arranged inside the case 12. Further, a hose hole 24 is bored in the hollow case 12, one end of a hose 26 is connected to the discharge side of the pump 16, the hollow case 12 is placed in the sea, and the light source 18 emits light at night to pump the pump 16. It comprises a collecting device 10 for collecting plankton and the like.

In the plankton collection device of the second aspect, the case 12 may be a cylindrical body.

In the collecting device for plankton or the like according to the third aspect, the cylindrical case 12 may be provided with a locking portion 36 for locking and fixing.

Further, in the collecting apparatus for plankton or the like according to claim 4, the light source 18 may be arranged near the window hole 14.

Further, in the collecting apparatus for plankton or the like according to claim 5, the window hole 14 may be a plurality of openings 34 arranged in a discontinuous manner.

In the collecting device for plankton or the like according to claim 6, the opening 34 may be formed in a strip shape that is long in the circumferential direction.

Further, in the collecting device for plankton or the like according to claim 7, a plurality of the strip-shaped openings 34 are formed in the circumferential direction in a discontinuous manner, and further arranged in parallel in at least two rows in the circumferential direction. Good as a matter.

Further, in the collecting apparatus for plankton or the like according to claim 8, the light source 18 may be an underwater light 30.

[0013]

In the apparatus for collecting plankton or the like according to claim 1, a window is provided in the peripheral wall of the hollow case, a pump and a light source are arranged inside the case, and a hose hole is bored in the hollow case. One end of a hose is connected to the discharge side of the pump, the hollow case is placed in the sea, and the light source emits light at night to collect plankton and the like by the pump. Plankton and the like gather on the light source projected through the window, and further enter the case through the window. Then, it is sucked by a pump and is stored in a tank on land via a hose or is discharged into the cultured squid on the sea.

In the apparatus for collecting plankton or the like according to the second aspect, since the case is a cylindrical body, the shape corresponding to the migration of the plankton or the like allows the case to naturally enter the case through the window hole. It is also easy to manufacture.

In the collecting device for plankton and the like according to claim 3, since the cylindrical case is provided with the locking portion for locking and fixing, the anchor locking ring of the quay wall and the anchor locking ring of the quay are easily provided.
This device can be suspended in the sea by locking it to a cultured squid frame on the sea.

In the collecting device for plankton or the like according to claim 4, since the light source is arranged in the vicinity of the window hole,
While collecting the plankton and the like by projecting light, a light source is arranged near a window hole which also has a function as an entrance to effectively realize those functions.

In the collecting device for plankton or the like according to the fifth aspect, since the window holes are a plurality of openings arranged in a discontinuous manner, the bright and dark portions can be reliably formed in the sea, and the collecting effect is effectively exhibited.

In the collecting device for plankton or the like according to claim 6, since the opening (window hole opening) is formed in a strip shape long in the circumferential direction, the hole shape has a certain degree of regularity and is easy to manufacture. It is possible to reliably form the light and darkness of light when projecting.

According to the collecting device for plankton or the like according to claim 7, since a plurality of strip-shaped openings are discontinuously formed in the circumferential direction and are arranged in parallel in at least two rows or more in the circumferential direction, The light and darkness of the light is surely formed, and the mold can be easily formed for mass production.

Further, in the collecting device for plankton or the like according to claim 8, since the light source is an underwater lamp, the electric wiring is watertight and can be used in seawater or the like.

[0021]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of a collecting device 10 for plankton or the like according to the present invention.

In the figure, the collecting device 10 for plankton or the like (hereinafter referred to as "collecting device") 10 comprises a hollow cylindrical case 12, the bottom surface is closed, and a window hole 14 is formed in the outer periphery on the lower end side. A pump 16 and a light source 18 are arranged inside the case 12. In the embodiment, the case 12 is made of hard synthetic resin plastic, and includes a case body 12a having an open upper end surface, and a lid portion 12b fitted in the opening so as to close the opening.

The case 12 is formed in a cylindrical shape, but fish such as plankton containing floating organisms circulate in a circular shape especially when swarming, so that the plankton is introduced into the case from a window opening described later. Etc. are made to extend like a normal electrophoretic state to facilitate entry.

An inverted L-shaped bracket 20 is fixed to the back surface of the lid 12b with its end portion facing downward. The lower end of the bracket 20 and the case 12
A pump 16 is suspended at a substantially central position inside. The pump 16 is a submersible pump having a watertight drive portion in consideration of water resistance. The submersible pump 16 has a suction port 22 at the lower end. The submersible pump is preferably a radial flow type pump, for example, a spiral flow type pump, rather than a positive displacement type or an axial flow type, since it is necessary to feed plankton existing in seawater continuously and with as little damage as possible. Is. However, the structure is not limited to this, and another structure may be used.

On the other hand, a hose hole 24 is opened in the lid portion 12b of the cylindrical case 12, and a discharge port 16a of the pump 16 is provided so as to project through the hose hole 24. A hose 26 made of rubber or synthetic resin plastic is connected to the discharge port 16a. As will be described later, this hose 26 is for feeding seawater or the like, and feeds it, for example, with its tip outlet positioned in a water tank arranged on land.

Further, a supporting rod 28 is fixed to the case body 12a at a position slightly lower than the inside of the case body 12a by bolts so as to pass through the case body. The light source 18 is attached to the support rod 28.
Is fixedly supported. The light source 18 is composed of, for example, an underwater lamp 30, and is fixed to a support rod 28 by penetrating a base portion 32 a of a socket 32 thereof. A lamp L as a light emitting source is attached to the center of the inside of the socket 32.

As shown in the figure, the mounting position of the underwater lamp 30 is arranged at the lower end with the vertical direction inside the cylindrical case 12 as the longitudinal direction.

As described above, the hollow cylindrical case 12
A window hole 14 is formed at the lower end side of the. The window hole 14 is formed near the light source 18. Since the window hole 14 is an entrance for a plankton or the like to be collected and is also a light projecting port, it is preferable to dispose the light source 18 at a position close to the window hole 14. The window hole 14 is a window for projecting the light from the light source 18 and is also an entrance / exit of a plankton or the like, and is therefore an indispensable and extremely important component in the present apparatus 10.

That is, in the present embodiment, the window hole 14 is formed by a plurality of openings 34 arranged in a discontinuous manner. The openings 34 are formed in rectangular strips that are long in the circumferential direction of the cylindrical case and are arranged in parallel in four rows. Then, they are formed at substantially equal intervals in the circumferential direction. It suffices that at least a plurality of openings 34 are provided, and the arrangement is not limited to four rows, but two rows, three rows,
It may be formed as five rows or more rows. Also. As in the embodiment, they may not be aligned and may be randomly arranged. Further, the shape is not limited to a long rectangle, but may be a square, a triangle, a pentagon, another polygon, a circle, another long circle, or any other shape. In short, there is illumination by a light source at night, and
The lighting is not in a form where the bright and dark parts can be relatively clearly distinguished, as in the case where light is emitted from only a single part, but there are bright and dark parts, and if possible, the bright and dark parts alternate. Is happening. The pitch width of light and dark may be set arbitrarily. However, when it emits light at night,
Other fish will also be gathered, so these large or relatively large fish should not be caught at the same time. It is desirable to have an opening hole that can collect only target floating organisms such as plankton. Of course, the present device may be used during the daytime.

In the present embodiment, the diameter of the cylindrical case 12 is about 22 cm, the width of the opening 34 is 1.5 cm, and the length is about 12 cm in the circumferential direction. It is set to about 2.3 cm. As a result, when the light source 18 emits light at night, light and dark portions are formed in the sea, and plankton and other floating animals gather there.

The size of the window opening 34 may basically be set arbitrarily. However, at most 3 cm for the purpose
It is considered necessary to have a long hole having a lateral width of square or 3 cm. If the size is smaller than that, it can be set freely without considering the suction efficiency of the pump.

The arrangement of the pump 16 and the light source 18 window 14 in the cylindrical case 12 is not limited to the embodiment. This collection device can be used not only in seawater but also in other rivers and the like, and can stably exhibit the effect of collecting plankton and the like.

Reference numeral 36 in the drawing denotes a locking portion for locking and fixing the device 10 attached to the peripheral wall from above the case body 12a. In the embodiment, a bracket having a through hole is provided in a protruding manner. The ropes 37 and other ropes 37 are hung on and suspended in the sea. Further, 38 is a light source 18
And an electric wire connected to the pump 16 and an external power supply source.

A device 10 for collecting such plankton.
When collecting plankton and the like by using, for example, as shown in FIG. 5, a support ring 42 or the like is fixed to the quay 40 of the port, and the collection device 10 is suspended and supported by a rope or the like.
The power source is connected to a commercial power source on land, and power is supplied to the pump 16 and the underwater light 30.

Floating organisms such as plankton that live on the surface of the water or in the water have a habit of gathering in the light and gathering like general fish. Therefore, the collection device 10 is mainly used at night.

If light is emitted from the light source at night in the sea,
Light and dark dim light is generated in the sea through the window holes 14, and floating microscopic organisms such as plankton also gather in the sea. At the same time, sea bream, sardines, sea bream and other fish also gather, but since the window opening 34 is formed to a certain size, only microscopic organisms such as plankton or floating organisms gather in the light, It reaches the inside of the case 12 through the hole opening 34. Then, it is attracted to the 16 suction ports 22 of the pump installed in the vicinity thereof, and the seawater is sucked from the center of the impeller by the centrifugal action of the centrifugal pump or the like, and outwardly in the radial direction via the discharge port 16a. leak. And hose 26
And discharged into the tank 44 installed on land. If the light source emits light all night and the pump is driven, usually about 1t can be collected. Therefore, in consideration of the power efficiency, the required amount of plankton, etc., the driving may be controlled by the timer drive so as to control the drive time corresponding to the required amount.

As a result, unlike the conventional work of collecting a plankton net having a small mesh while pulling it around the sea by a ship, at least one worker is required.
Further, maintenance and management of the net are not required, and a large amount of plankton or the like can be reliably secured simply by supplying electric power. In addition, it is possible to secure a stable yield regardless of the weather and weather.

The collecting device 10 may be installed at a place where it is supported not by a quay wall but by a cultured squid frame provided inside or outside the bay. In this case, the collected plankton and the like can be directly discharged and put into the adjacent cultured squid, so that the feeding work in the culture can be smoothly performed.

In this embodiment, the cylindrical case 12 is made of plastic synthetic resin, but is made of metal, light metal,
Any wooden or other water resistant hard material may be used. The light source may also be a solar cell, a fuel cell, a fuel generator, or the like.

The device for collecting plankton or the like according to the present invention is not limited to the configuration of the embodiment described above, and may be modified in any manner without departing from the essence of the invention described in the claims. Is also good.

[0041]

As described above, according to the collecting apparatus for plankton or the like according to the first aspect, the window is provided in the peripheral wall of the hollow case, and the pump and the light source are arranged inside the case. Further, a hose hole should be bored in this hollow case, one end of the hose should be connected to the discharge side of the pump, and the hollow case should be placed in the sea to allow the pump to collect plankton etc. while emitting light from the light source at night. Therefore, with the extremely simple structure, not only the manufacturing cost is low, but also labor is not required for the collection work, and it is possible to secure a stable yield regardless of the weather. Play.

According to the apparatus for collecting plankton or the like of claim 2, since the case is a cylindrical body, the plankton or the like can be easily inserted from the window hole, and is easy to assemble. The number of assembling steps can be reduced in manufacturing, and the manufacturing cost can be reduced.

Further, in the collecting device for plankton or the like according to the third aspect, since the case of the cylindrical body is provided with the locking portion for locking and fixing, a rope, a wire or other rope is used. It can be easily suspended and supported on the quay or a support on the sea.

Further, in the collecting apparatus for plankton or the like according to claim 4, since the light source is arranged in the vicinity of the window hole, the light source is combined with the entrance for the plankton and the window hole as the light projecting port. Lighting function can function effectively

Further, in the collecting apparatus for plankton or the like according to claim 5, since the window hole is a plurality of openings arranged in a discontinuous manner, a bright portion and a dark portion of the illumination from the light source are formed in the sea, Without alerting Plankton,
Can be naturally attracted into the case.

Further, in the collecting device for plankton or the like according to claim 6, since the opening is formed in a strip shape long in the circumferential direction, not only the bright and dark portions of the illumination can be accurately formed but also to some extent in manufacturing. It has regularity and is easy to mass-produce.

Further, in the collecting device for plankton or the like according to claim 7, since the plurality of strip-shaped openings are discontinuously formed in the circumferential direction, and further arranged in parallel in the circumferential direction in at least two rows or more. It is possible to secure mass productivity during manufacturing and to achieve the function of generating light and dark in the sea.

Further, according to the collecting device for plankton or the like according to the eighth aspect, since the light source is an underwater lamp, even if the device is used under the sea or in other water, it is electrically operated. Watertightness is secured at the connection part, and it is possible to achieve the collection effect.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional explanatory view of a device for collecting plankton or the like according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a device for collecting plankton or the like according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a window hole portion.

FIG. 4 is a view taken along the line AA of FIG.

FIG. 5 is a schematic explanatory view of one usage state of the device of the present invention.

[Explanation of symbols]

 10 Collection Device of Plankton 12 Cylindrical Case 12a Case Body 14 Window Hole 16 Pump 18 Light Source 26 Hose 30 Underwater Lamp 34 Window Hole Opening L Lamp

Claims (8)

[Claims] 1. A hollow case is provided with a window hole in a peripheral wall thereof, a pump and a light source are arranged in the case, and a hose hole is bored in the hollow case, and one end of the hose is provided on a discharge side of the pump. A device for collecting plankton, etc. that connects the same and places the hollow case in the sea and causes the light source to emit light, such as at night, to collect plankton, etc. with a pump. 2. The device for collecting plankton or the like according to claim 1, wherein the case is a cylindrical body. 3. The collecting device for plankton or the like according to claim 2, wherein the cylindrical case is provided with a locking portion for locking and fixing. 4. The collecting device for plankton or the like according to claim 1, wherein the light source is arranged in the vicinity of the window hole. 5. The collection device for plankton or the like according to claim 2, wherein the window holes are a plurality of openings arranged in a discontinuous manner. 6. The collection device for plankton or the like according to claim 5, wherein the opening is formed in a strip shape long in the circumferential direction. 7. The collecting device for plankton or the like according to claim 6, wherein a plurality of the strip-shaped openings are discontinuously formed in the circumferential direction, and are further arranged in parallel in at least two rows or more in the circumferential direction. 8. The plankton trapping device according to claim 1, wherein the light source is an underwater lamp.