JP7103558B2 - Aquaculture equipment - Google Patents

Description

The present invention relates to a fish farming apparatus.

Fish farming is carried out from the viewpoint of protecting fish resources and stable supply of fish. For example, in tuna farming, immature fish are raised in cages placed on the surface of the sea to a size that can be shipped to the market.

Especially in tuna farming, it is extremely important for management to prevent tuna from being surprised by sudden changes in the environment and becoming excited and swimming frantically. For example, if a cage is installed on the sea near the coast, the tuna will behave astonishingly just by the headlights of the car reaching the cage that is pitch black at night.

As one of the methods for preventing such startle behavior of tuna, a method for keeping the water surface of the cage at a uniform illuminance is disclosed (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-19485

By the way, fish such as tuna have a habit of gathering in the light, and in the conventional method of brightening the surface of the cage (swimming tank), the fish gather near the water surface, and especially for large fish such as tuna, the fish gather near the water surface. It is not preferable to collide and get hurt or die. Therefore, an object of the present invention is to provide a culture device capable of preventing startle behavior and allowing fish to swim in a wide swimming area without collecting fish in a part of the swimming tank. Another object of the present invention is to provide an aquaculture device in which the lighting start time and the lighting end time of the lighting device can be easily set.

In order to achieve the above object, the invention according to claim 1 of the present application is a culture device provided with a lighting device that illuminates a swimming tank in which the farmed fish swim. Arranged so as to irradiate the central portion of the swimming tank by radiating light from the water on the surface side of the tank to the bottom surface side, or from the water on the surface side of the swimming tank to the bottom surface side, at least in any direction. A columnar lighting region is formed in the central portion of the swimming tank, and the lighting device uses the LED as a light source, gradually increases the illuminance of the light emitted from the LED at the start of lighting, and gradually increases the illuminance of the light emitted from the LED at the end of lighting. It is characterized by having a function of controlling so as to gradually reduce the illuminance .

The invention according to claim 2 of the present application is the culture apparatus according to claim 1 , wherein the lighting device has a function of detecting the illuminance on the water in which the culture device is installed or the illuminance in the water, and the illuminance of the illuminance. It is characterized by having a function of controlling to increase or decrease the illuminance of the light emitted from the LED from the detection result.

The invention according to claim 3 of the present application is the culture apparatus according to claim 1 , wherein the lighting device has an installation location detection function for detecting a place where the culture apparatus is installed, and at least a sunrise at the installation location of the culture apparatus. It has a function to read the sunset time from the storage means, a function to read the sunset time of the installation place and start lighting at a preset lighting start time, and a function to read the sunrise time of the installation place and set in advance. It is characterized by having a function of ending the lighting at the end time of the sunrise.

According to the present invention, since the columnar irradiation region that reaches the deep position of the swimming tank is formed, the fish are dispersed and swim in the depth direction of the swimming tank, and the fish collide with each other and are injured or die. It is especially effective as a large fish farming device such as tuna.

Further, the lighting device used in the aquaculture device of the present invention has an advantage that the illuminance control of the light emitted from the LED becomes very easy by using the LED as a light source. In particular, when cultivating fish that are prone to startle behavior such as tuna, and when it is necessary to adjust the illuminance so that there is no sudden change in illuminance, the adjustment is convenient and preferable.

Furthermore, the position detection means such as GPS and the annual sunrise time and sunset time are memorized for each location, and the number of minutes after the sunrise time or the sunset time is set in advance as the lighting end time or the lighting start time. By setting the lighting start time and the lighting end time as appropriate, the lighting start time and the lighting end time can be automatically set regardless of the installation location of the swimming tank, which is preferable because the drive management of the lighting device becomes simple.

It is a figure explaining the aquaculture apparatus of 1st Example of this invention. It is a figure explaining the arrangement of the lighting apparatus of 1st Example of this invention. It is a figure explaining an example of the control method of the lighting apparatus of 1st Example of this invention. It is a figure explaining another example of the control method of the lighting apparatus of 1st Example of this invention. It is a figure explaining the arrangement of another lighting apparatus of 1st Example of this invention. It is a figure explaining the arrangement of the lighting apparatus of the 2nd Example of this invention.

In the aquaculture device of the present invention, a columnar lighting area is formed substantially in the center of the swimming tank by a lighting device, and the fish are configured to swim around the columnar lighting area, so that the fish can swim in a wide area. .. In addition, it is possible to control the illuminance so that the fish does not startle, especially at the start of lighting. Hereinafter, examples of the present invention will be described.

First, a first embodiment of the present invention will be described. FIG. 1 is an explanatory view of a swimming tank 1 such as a cage installed on the sea where fish such as tuna are cultivated, and FIG. 2 is an explanatory view of a central portion of the swimming tank 1 viewed from the side. In the example shown in FIG. 2, the case where the lighting device 2 that radiates light from the water on the bottom surface side of the swimming tank 1 toward the water surface side is arranged is shown. 3 is a float. The description of the power supply line and the like of the lighting device 2 is omitted. During a sunny day, the swimming tank 1 is sufficiently exposed to sunlight, and even if some light is incident from the outside, the fish will not behave astonishingly. Therefore, even if the lighting device 2 is turned off, there is no problem. do not have. On the other hand, when the sunlight does not reach the swimming tank 1 sufficiently, such as on a cloudy day or at night, if some light is incident from the outside, the fish will behave astonishingly, so the irradiation device 2 is turned on. There is a need.

When the lighting device 2 is turned on, as shown in FIG. 2, light is radiated from the lighting device 2 toward the water surface side to form a columnar lighting region 4. The illuminance of the lighting device 2 is set so that the columnar lighting region reaches the water surface. As shown in FIG. 2, only one lighting device 2 may be installed, or a plurality of lighting devices 2 may be set.

In the swimming tank 1 in which the illumination region 4 is formed in this way, fish gather around the illumination region 4 and go around the illumination region 4. Since this illumination region 4 is formed over the depth direction of the swimming tank 1, the fish swim in a dispersed manner in the depth direction as compared with the case where only the surface of the water surface is illuminated by the illumination device as in the conventional method. It will be.

The lighting device 2 preferably uses an LED as a light source. This is because it is easy to control the on state, the off state, and the illuminance of the lighting device 2 shown below. Hereinafter, the control method of the lighting device 2 will be described in detail.

FIG. 3 shows an example of a control method of the lighting device 2 on a sunny day. During the daytime, the lighting device 2 is left off because sufficient sunlight is incident on the swimming tank. In the evening and after sunset, the brightness of the sunlight gradually decreases. Therefore, the lighting device 2 starts emitting light at a time (for example, one hour before sunset time) before it begins to darken in a state where there is sufficient sunlight. At that time, the conventional lighting device emits a very bright light even when it is turned on, which may cause a startle behavior of the fish. On the other hand, if a lighting device using an LED as a light source is used and a digital power source is used as a driving power source for the lighting device, the illuminance of the light radiated from the lighting device 2 can be gradually increased from zero. For example, as shown in FIG. 3, in the evening time when the brightness of sunlight gradually becomes dark, the lighting device 2 is turned on at a time when the surroundings are sufficiently bright, and the amount of light emitted from the LED is gradually reduced. increase. Further, when the sunlight is completely eliminated, the illuminance of the LED is controlled to a predetermined value. By controlling the power source for driving the LED in this way, it is possible to form the columnar illumination region 4 without causing the startle behavior of the fish by starting the light emission from the illumination device 2.

Also, from sunrise until the area around the swimming tank becomes sufficiently bright, if the control opposite to the above is performed as shown in FIG. 3, even if the light irradiation from the lighting device 2 gradually decreases, the fish behaves astonishingly. Will not be invited. It should be noted that there is no problem even if the time when the lighting device 2 is turned off is shifted to the daytime time side shown in FIG. 3 from the time when the surroundings of the swimming tank gradually become brighter.

As described above, in the aquaculture apparatus of the present invention, a columnar illumination region 4 is formed near the center of the swimming tank 1. Since the illumination region 4 is formed over the depth direction of the swimming tank, the fish are dispersed in the depth direction and swim around, so that collisions and the like can be prevented. Further, in the illumination area 4, there is no problem in allowing the fish to swim and pass through, and the fish does not hit an obstacle and get hurt. In particular, when the lighting device is arranged on the bottom surface side of the swimming tank 1 as shown in FIG. 2, the illuminance on the lighting device 2 side is high, fish gather at a deeper position, and some light is incident on the water surface side from the outside. There is no problem.

The control of the illuminance of the light emitted from the lighting device 2 is not limited to the above description and can be changed as appropriate. For example, in the example shown in FIG. 4, when the weather is bad and sufficient sunlight does not fall on the swimming tank 1 even during the daytime, the lighting device 2 can be kept on during the daytime. be. By gradually increasing or decreasing the illuminance in the evening or sunrise time zone, the astonishing behavior of the fish will not be caused by the increase or decrease of the illuminance of the lighting device as described above.

As described above, the startle behavior of the fish can be prevented by appropriately controlling the illuminance of the lighting device according to the illuminance of the place where the swimming tank 1 is installed. In order to control the illuminance in this way, it is preferable to have an illuminance meter in order to measure the illuminance at the place where the recreational fishing tank 1 is installed. In addition, since the times of sunset and sunrise change depending on the season, it is possible to prepare these data for each season and control based on the data. At that time, in order to detect the installation location of the swimming tank to be controlled, it is preferable to provide a GPS device or the like and a means for detecting the installation location of the aquaculture device. Further, as shown in FIG. 5, a lighting device 2 that illuminates the side surface of the swimming tank 1 may be added so that the fish can recognize the size of the swimming tank 1. In this case, the illuminance of the lighting device 2 that illuminates the side surface of the swimming tank 1 is lower than the illuminance of the central columnar lighting area 4 of the swimming tank 1, so that the fish can move around the central columnar lighting area 4. It will be possible to swim preferentially and prevent it from hitting the side wall of the swimming tank 1.

Next, a second embodiment will be described. In the first embodiment, the lighting device 2 is arranged from the water on the bottom surface side of the swimming tank 1 toward the water surface side, but the lighting device 2 may be arranged on the water surface side. FIG. 6 is an explanatory view when the swimming tank 1 is viewed from the upper surface side. By fixing the illuminating device 2 to the illuminating raft 5, the illuminating region 4 can be formed by the light radiated from the water on the water surface or on the water surface side. In order to prevent the collision between the lighting device 2 and the fish, it is preferable to arrange the lighting device 2 on the water surface. In this method of arranging the lighting device 2 on the water surface or the like, maintenance of the lighting device is easy, and it is possible to avoid a problem that the food given to the fish sinks in the sea and accumulates on the lighting device 2. It is also preferable from. In the example shown in FIG. 6, an example is shown in which a lighting device 2 that illuminates the side surface of the swimming tank 1 is added so that the fish can recognize the swimming tank 1. In this case, the illuminance of the lighting device 2 that illuminates the side surface of the swimming tank 1 is lower than the illuminance of the central columnar lighting area 4 of the swimming tank 1, so that the fish can move around the central columnar lighting area 4. I will swim.

The present invention is not limited to aquaculture equipment installed on the sea, and may be aquaculture equipment installed on land.

1: Swimming tank, 2: Lighting device, 3: Float, 4: Lighting area, 5: Lighting raft

Claims (3)

In aquaculture equipment equipped with a lighting device that illuminates the swimming tank where the aquaculture fish swim
The lighting device is at least one of the water to the water surface side of the bottom surface of the swimming tank, the water to the bottom surface side of the surface side of the swimming tank, and the water surface to the bottom surface side of the swimming tank. It is arranged so as to radiate light in the direction of the swimming tank to irradiate the central portion of the swimming tank, and a columnar illumination region is formed in the central portion of the swimming tank.
The lighting device is characterized in that it uses an LED as a light source and has a function of gradually increasing the illuminance of the light radiated from the LED at the start of lighting and gradually decreasing the illuminance at the end of lighting . Culture equipment. In the aquaculture apparatus according to claim 1.
The lighting device has a function of detecting the illuminance on the water where the culture device is installed or the illuminance in the water, and increases or decreases the illuminance of the light radiated from the LED from the detection result of the illuminance. A culture device characterized by having a function of controlling light. In the aquaculture apparatus according to claim 1 .
The lighting device has an installation location detection function for detecting the place where the culture device is installed and a function for reading at least the sunrise and sunset times at the installation location of the culture device from a storage means. It is characterized by having a function of reading the sunset time and starting lighting at a preset lighting start time and a function of reading the sunrise time of the installation location and ending the lighting at a preset lighting end time. Cultivation equipment.

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