JPH0697926B2 - Method of guiding fish school - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is a completely novel method that can be used very effectively when growing and breeding a large number of fish mainly in marine farms and when they are caught or evacuated. A method for inducing a school of fish.

<Prior art> In order to keep many fish in a certain area (for example, a marine ranch) at all times, conventionally, there has been a method of installing a device such as a long boundary net or a power line around a predetermined water area. Although proposed, the initial cost required for constructing such a large-scale device is not only enormous, but also the running cost required for maintenance of the device is very high.

The ideal form of a marine ranch is to keep many fish economically in a certain area without using such a large-scale device that requires high running costs. As another conventional method for that purpose, a method of artificially constructing a facility such as a fish reef (fish reef) by sinking a block or the like in the water bottom of a water area suitable for fish farming (for example, in a bay) and allowing the fish to settle near the reef There is.

<Problems to be Solved by the Invention> However, even when such a conventional method is used, there are relatively few water bodies such as bays where the conditions applicable as an ocean ranch are relatively small. There are many restrictions, and it takes a huge initial cost to construct artificial reef facilities such as blocks. Even if the water area was initially appropriate, industrial wastewater will increase and sludge will accumulate after a long time. 、 Fishes may not be able to live due to environmental deterioration due to the installation of other structures in the vicinity. Even in places where there is no concern for industrial wastewater or sludge, sudden tides such as red tides, typhoons, and tsunamis may occur. There are various problems such as the danger of erasing fish in an accident.

It would be good if the waters of the environment suitable for the fish to live can always be arbitrarily selected and the fish can be kept in the waters without being separated, but the fish can freely move in the sea according to its own instinct. Since it is a migratory fish, it is very difficult for a human to accurately grasp, predict, or control such a migratory route of fish. Even more so for a group of fish (a school of fish). In other words, it is extremely difficult to artificially control a certain range of water selected as a marine ranch so as not to leave it, and it takes a long time for fish to grow and multiply. Keeping the fish in a certain amount of water during that time is a difficult technique.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is that there are few spatial restrictions, and a large-scale device or equipment such as a long net for boundaries, an electric wire, or an artificial fish reef. It is an object of the present invention to provide a method for inducing a school of fish that can be carried out relatively easily without the need for construction of fish and can be effectively used for breeding fish in a group reliably and safely for a long period of time.

<Means for Solving Problems> As a means for achieving the above object, the present invention provides a submersible robot equipped with a fish collecting means, which is substantially closed-loop while operating the fish collecting means intermittently. Along the predetermined underwater course, which is repeated for a relatively long period of time to automatically make a round trip, and the underwater navigation robot intermittently or continuously operates the fish collecting means while performing the predetermined closed loop shape. We propose a method for guiding a school of fish, characterized by including the process of forcibly guiding and navigating to an arbitrary underwater course away from the underwater course.

<Action> The action exhibited by the method for inducing a school of fish according to the present invention using the above characteristic means is as follows.

When a fish collecting means (for example, a bait device) of the underwater navigation robot is activated, many fish gather near the underwater navigation robot according to its instinct. Therefore, when an underwater navigation robot equipped with this fish collecting means is made to navigate, a school of fish that has been collected follows along its navigation locus. Therefore, if the underwater navigation robot repeatedly travels in a closed loop underwater course for a relatively long period of time while operating the fish collecting means, the fish school also repeats the tour of the tour course according to the underwater navigation robot, and eventually the tour. Get used to the course. Furthermore, because of the nature of group behavior of fish, the school of fish gradually grows, and the fish come to follow the underwater navigation robot more and more with peace of mind.

That is, an underwater navigation robot having a fish collecting means is allowed to repeatedly automatically cruise along a predetermined underwater course forming a constant closed loop while intermittently operating the bait device so as to minimize the food consumption. By
It is possible to collect fish in a group within a certain area without constructing a large-scale device or equipment such as a long net for boundaries, a power line, or an artificial fish reef. The construction of the above-mentioned device or equipment is related to various necessary conditions such as few waves and shallow water depth, but in the case of the method for guiding a fish school using the underwater navigation robot having the fish collecting means according to the present invention. In this case, it is possible to be hardly restricted by such conditions, and the cost is relatively economical. In particular, if it is a place provided for fish to live, it is not limited to the inside of the bay, and the conditions of the selectable water area such as offshore are greatly eased.

Then, after automatically circulating the closed-loop predetermined underwater course for a long period of time as described above,
Schools of fish are fully accustomed to underwater navigation robots, and they will follow up with peace of mind. While operating intermittently or continuously, it is possible to reliably guide the school of fish to the desired location by forcibly guiding and navigating to any underwater course away from the closed loop predetermined underwater course that had been circulating until then. become.

<Example> Hereinafter, a specific example of the present invention will be described in detail with reference to the drawings.

A buoy 1 provided with a power source composed of a solar cell and a storage battery having a relatively large capacity, and a sonar (not shown) operated by the power source is moored via a wire 3 by an anchor 2 sunk on the seabed. ing. The underwater navigation robot 4 guided by the ultrasonic wave S ₁ transmitted into the water from a sonar (not shown) in the buoy 1 has its ultrasonic wave S ₁
Ultrasonic receiving sensor 5, propulsion device 6, horizontal ladder 7, vertical ladder 8, ultrasonic transmitter 9 for collecting fish, bait device 10 for collecting fish, underwater television camera 11 for forward monitoring, A searchlight 12 for front illumination, a water depth detector 13, and a power supply device for operating the above devices and a microcomputer (not shown) for controlling them are mounted.

The microcomputer is configured to perform the following various controls.

That is, based on the data from the water depth detector 13, the vertical rudder 8 is controlled so as to be positioned within a predetermined water depth (for example, 40 to 50 m). The propagation range of the ultrasonic wave S ₁ transmitted by the sonar in the buoy 1 is determined based on the data from the ultrasonic wave reception sensor 5, and a predetermined radius (for example, 50 to 100 m) is drawn within the propagation range to form a substantially closed loop. The left and right rudder 7 and the propulsion device 6 are controlled so as to automatically cruise by repeating a predetermined underwater course L ₀ . Also, based on the video data that the searchlight 12 illuminates and the underwater television camera 11 captures, the ladders on the left, right, up and down are used to avoid obstacles.
Control 7,8. Then, the ultrasonic transmitter 9 for collecting fish
And the bait device 10 are operated intermittently (in this example, periodically by a built-in timer at predetermined time intervals) and simultaneously.

The bait A (dry pellet) sprinkled in water from the bait device 10
A lot of fish gather due to the smell of. At this time,
Since ultrasonic waves S ₁₁ having a frequency that fish likes are transmitted from the ultrasonic transmitter 9 into the water, the fish gather from a distant place where the smell does not reach. Dieted fish grow and multiply. In addition, since the ultrasonic wave S ₁₁ is always transmitted when the bait A is sprinkled, the inseparable relationship between the bait A and the ultrasonic wave S ₁₁ is bound and immobilized in the brain of the fish (Pavlov's conditional reflex). .
Repeating this kind of thing, food A eventually
Even if you don't sprinkle, the fish will start to gather just by transmitting ultrasonic waves S ₁₁ .

Another buoy 1a (having the same structure as the buoy 1) is placed at a suitable distance from the buoy 1 by the anchor 2a.
It is moored via 3a. However, the frequency of the ultrasonic wave S ₂ transmitted by the sonar in the buoy 1a is different from the transmission frequency of the sonar in the buoy 1. If it is configured to switch the timing between the built-in timer of buoy 1 and the built-in timer of buoy 1a, the transmission of ultrasonic wave S ₁ from buoy 1 can be stopped and the buoy 1a Sound wave S ₂
To send the underwater navigation robot 4 to the buoy 1a.
It is possible to move to a new closed-loop predetermined underwater course L ₀ immediately below, and to automatically cruise along it. That is, the habitat of the fish can be moved from directly under the buoy 1 to directly under the buoy 1a or vice versa.
Alternatively, the underwater navigation robot 4 may be controlled to move back and forth between the buoy 1 and the buoy 1a in order to increase the activity of the fish in accordance with the rapid growth period of the fish.

Further, as shown in FIG. 2, when a grown fish is caught, a sonar (not shown) provided on the fishing boat 14 is used to move the underwater navigation robot 4 to a predetermined underwater course L ₀ forming the closed loop. By transmitting ultrasonic wave S ₀ for forcible control for forcibly guiding to any underwater course L deviated from
Forced guidance control by remote control such as guiding the underwater navigation robot 4 into the fishing net 15 is also possible.
In this case, the fish fleet ultrasonic wave generator 9 and the bait device 10 of the underwater navigation robot 4 are simultaneously and preferably continuously (periodically) operated so that the school of fish can be swept. It is possible to guide the fish into the fishing net 15 with certainty, and to catch the entire net.

The forced guidance control to the arbitrary underwater course L by such remote control can be used in various cases as described below.

For example, when an emergency such as red tide occurs,
The underwater navigation robot 4 is urgently moved to a safe place by urgently launching a high-speed navigation or the like and transmitting a forced control ultrasonic wave S ₀ for forcibly guiding the underwater navigation robot 4 from the high-speed navigation. At this time as well, the underwater navigation robot 4 may operate the ultrasonic transmitter 9 for fish collecting and the bait device 10 simultaneously and continuously.

Furthermore, when power is supplied (or replaced) to the power supply device of the underwater navigation robot 4 or when food is supplied to the bait device 10, for example, a supersonic wave S ₀ for forced control is transmitted from the management boat, and the underwater navigation robot 4 is operated. It is sufficient to recover by raising and to carry out the work. In that case, the ultrasonic transmitter 9 and the bait device 10 for collecting fish are
It does not have to be operated together.

In the above embodiment, the ultrasonic transmitter 9 and the bait device 10 are used together as the fish collecting means, but only one of them may be used.

<Effects of the Invention> As is clear from the above-mentioned details, according to the method for inducing a school of fish of the present invention, a large-scale device such as a long net for boundaries, an electric wire, or an artificial reef as in the past has been used. Alternatively, it is possible to obtain various beneficial effects as described below, while it is a method that can be implemented relatively easily and economically without requiring the construction of equipment.

That is, an underwater navigation robot equipped with a fish collecting means is repeatedly operated automatically on a predetermined underwater course in a closed loop while periodically operating the fish collecting means, so that a large number of fish can always be attracted in a reassuring state. If it is a place suitable for fish to live, it is possible to select a wide range of breeding waters not only in the bay but also in the offshore area, and at the same time, a large number of fish can be kept in a certain amount economically. It can be effectively kept within the area, and thus a arbitrarily selected area of water can be defined as a marine ranch, which can be easily and economically controlled to prevent fish from leaving it for long periods of time. Therefore, the growth and multiplication of fish can be promoted very efficiently.

In addition, by forcing the underwater navigation robot to intermittently or continuously operate the fish collecting means, forcibly guiding along an arbitrary underwater course apart from the closed loop predetermined underwater course that was automatically patrol until then. Therefore, when catching fish, a school of fish is guided into the fishing net to catch it in a single net, or because of environmental deterioration due to, for example, an increase in industrial wastewater, accumulation of sludge, or the installation of other structures in the vicinity. Even if the fish can no longer live in the area, or if there is a risk that the fish will be wiped out due to a sudden accident such as the red tide, typhoon, or tsunami, it is easy to move the fish to a new or safe water environment with good environment. It can be moved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method for inducing a fish school according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a fishing state. 4 ... Underwater navigation robot 9 ... Ultrasonic wave transmitter (fish collecting means) 10 ... Salting device (fish collecting means) L ₀ ...... Closed loop predetermined water course, L …… Any underwater course.

Claims (2)

[Claims] 1. An underwater navigation robot equipped with a fish collecting means is automatically operated repeatedly along a predetermined underwater course substantially in a closed loop while operating the fish collecting means intermittently, for a relatively long period of time. A step of patrol, the underwater navigation robot, while operating the fish collecting means intermittently or continuously, forcibly guided navigation to any underwater course away from the closed loop predetermined underwater course, A method for inducing a school of fish, which comprises: 2. A bait device as the fish collecting means, or
The method for inducing a school of fish according to claim 1, wherein an ultrasonic wave transmitting device or a bait device and an ultrasonic wave transmitting device that can be operated simultaneously with the bait device are used.