JP2672389B2 - How to feed fish - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of feeding a fish capable of attracting fish, promoting the growth of fry, and facilitating the catch of adult fish.

[Conventional technology]

Both group-behavior and single-behavior fish respond to auditory, visual, olfactory, and taste stimulation, attracting to the stimulation source, or, rarely, from the stimulation source. It is known to take escape flight. Of these various stimulations, the auditory stimulation with a high propagation speed in water, that is, the oscillation of vibration such as sound waves is the effective attracting method.
Therefore, when a sound wave is oscillated in the nearby water at the same time as the start of feeding or before feeding, the fish and juvenile juveniles acquire the conditioned reflex that responds well to the sound. In this way, the fish that have learned the sonic response react to and attract sound sensitively, and can be used as a feed, with the feed given to nearly 100% without being scattered. However, the sound waves used for this purpose have hitherto been frequencies in the human audible range, and are not necessarily optimal depending on the fish species. It was recognized as dull.

[Object of the invention]

The present invention has been made in view of the above problems,
The purpose of this is to propose a method for feeding a fish that oscillates in the water during feeding and the fish reacts sensitively to easily learn the conditioned reflex to attract.

[Configuration of the invention]

This method for feeding fish is characterized by oscillating low-frequency vibration of a frequency of 0.01 to 49 Hz in the water area near the feeding during and / or before feeding the fish.

The present inventor has found that certain types of fish can perceive underwater sounds.
It is not necessarily limited to human audible vibrations, so-called sound waves, but rather it is confirmed that it responds well to vibrations in the very low frequency range near the lower limit of human audible range or outside the audible range.
By oscillating vibrations in the low frequency range of the above conditions and learning the conditional reflex by repeating the feeding cycle to fish, compared to the case of conventional audible sound waves, the period of reaching fever can be shortened significantly, At the same time, the conditioned reflection could be significantly increased.

〔Example〕

FIG. 1 shows a feeding device used in the feeding method of the embodiment,
A vibration unit 1 that oscillates vibration in water and a feeding device 2 that sprinkles feed are provided. The vibration unit 1 has a power supply 3,
A timer 4, an oscillator 5, a frequency converter 6, and an amplifier 7 are connected in order, and the feeding machine 2 includes a feeding tank 8 and is connected to a power supply 3 via the timer 4.

Figure 2 shows an aquarium 9 that has been fed, with a length of 3.0 m and width of 3.
0 m, depth 1.5 m, capacity 13.5 m ³ , a feeder 2 and a vibration unit 1 are attached to the side edges. In each of these aquariums, put 500 flounder juveniles with a length of 10 mm one month after hatching,
This feeding method was repeated.

The sound pressure was 8d in each tank from the initial vibration unit.
b, Oscillations with frequencies of 300Hz, 100Hz, 50Hz, 10Hz, 0.1Hz, 0.05Hz were oscillated, but because the flounder reaction was sharp between 50Hz and 10Hz, 40Hz was added. Three minutes after the start of oscillation, dry pellet feed was sprinkled from the feeding device. This was continued twice a day for two months until release.

In the case of 300 Hz, three days after the start of the experiment, a slight reaction toward the sound source was observed in response to vibration oscillation before spreading the feed. Approx. 20% after 7 days, 40% after 14 days, 50% after 28 days, 80% after 50-60 days
Met.

In the case of 100Hz, a slight reaction occurred 2 days after the start of the experiment, 80
It took 30 days to reach the% reaction.

In the case of 50 Hz, a reaction was observed 2 days after the start, and it took 28 days to reach 80%.

In the case of 40 Hz, the reaction was observed the day after the start, reaching 80% in only 7 days, and after 10 days, almost reached 100%.

 In the case of 10 Hz, it was almost the same as 40 Hz.

In the case of 0.1 Hz, a reaction was observed 2 days after the start, and gradually increased over the course of the day, reaching 80% after 20 days and 100% after 25 days.

In the case of 0.05 Hz, a reaction was observed 2 days after the start of the reaction and similarly increased, reaching 80% after 25 days.

In the example for this flounder, there is a region that sensitively reacts to the low frequency region outside the audible range of human beings, and the learning effect is increased by setting the frequency range of 0.05 to 50 Hz, and the feed is not wasted and raised. I was able to increase the effect.
More preferably, the frequency is in the range of 0.1 to 40 Hz.

In addition, in the embodiment, the feeder and the vibration unit are incorporated and used in one device, but they may be used separately.

〔The invention's effect〕

The present invention is as described above. This feeding method allows fish to learn sensitive reflex conditions for attracting by vibration stimulation in a short period of time, thereby increasing the utilization rate of feed and promoting breeding. In addition, there is also a memory of learning that lasts for a long period of time, and it can be attracted by vibration and oscillation after growth to be used as a catching stool.

Also, fish that have been artificially fed without any shortage have to be fed by themselves in the natural world after release, but fish that have already grown to fish-eating characteristics immediately after release can easily hunt for fish to be kept. Absent. Therefore, in general, the initial wear immediately after the release is severe, which reduces the release effect. However, according to the feeding method of the present invention, the fish wears the sensitive conditioned reflex that is attracted by the vibration that oscillates during feeding. Collective feeding continues, artificially effective feeding becomes possible, and there is an effect of gradually acclimatizing to the natural world while preventing initial wear.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall schematic view of a feeding device, and FIG. 2 is a perspective view of a water tank to which the feeding device is attached. 1 ... Vibration unit, 2 ... Feeder, 3 ... Power supply, 4 ...
… Timer, 5… Oscillator, 6… Frequency converter, 7…
… Amplifier, 8 …… Feed tank, 9 …… Aquarium.

Claims (1)

(57) [Claims] 1. A method of feeding a fish, characterized in that vibration of a low frequency range of 0.01 to 49 Hertz is oscillated in a water area near the feeding during and / or before feeding the fish. .