JP2008220206A - Fish-collecting device and fish-collecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently, as well as, simply and quickly collect fishes in various fishing grounds and fishing spots. <P>SOLUTION: Sound waves of frequency range 20 Hz to 2 kHz are emitted at intervals of 20 millliseconds to 2 seconds so as to attract fishes. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fish collection apparatus and a fish collection method. More specifically, the present invention relates to a fish collection apparatus and a fish collection method for attracting fish using sound waves.

  When fishing, fish are sometimes attracted using a bait called “Komare”. For example, Ami and sardine mince are generally used. In the fishery field, fish may be collected using fired bait.

  However, fishing using fired bait like komase pollutes the coral and the quay and causes unpleasant environments such as bad odors. In addition, it is difficult to attract fish efficiently to a desired place because that bait easily spreads over a wide range due to the influence of ocean currents. Moreover, there is a concern that the bait itself may cause marine pollution and adversely affect the ecosystem.

Therefore, in recent years, various methods for collecting fish using the phototaxis of fish have been proposed as a method for collecting fish instead of thatched bait. For example, a method for collecting fish by attaching a large number of color light-emitting diodes to a part or the whole of a side surface of a fish-collecting lamp body and lighting it in the sea (Patent Document 1), a plurality of light-emitting units, and the plurality of light-emitting units And a control unit that sequentially turns on the light, a method of giving a continuous movement to the light emission of the light emitting unit to indulge the curiosity of the fish and enhance the fish collection effect has been proposed (Patent Document 2).
JP 2006-204223 A JP 2006-325498 A

  However, since the range in which the light from the fishing light reaches depends on the transparency of water, the effect of the fishing light is limited to a short distance when collecting fish in seawater, which generally has low transparency. Therefore, it cannot be said that the fish collection method using the fish collection lamp is a suitable method for collecting fish in seawater.

  In addition, even within the range where the light of the fish collection light can reach, the fish collection effect cannot be obtained unless the light of the fish collection light is recognized by the visual perception of the fish. For example, fish that inhabit rocky reefs and seaweeds, and fish that are migrating with their backs to the collection light have a low probability of recognizing the light from the collection light. For this reason, it is the present condition that fish cannot be collected efficiently even if it uses a fishlight.

  Then, an object of this invention is to provide the fish collection apparatus and the fish collection method which can collect fish efficiently and simply in various fishing grounds and fishing grounds.

  In order to solve such a problem, the present inventor uses the sense of hearing or tactile sense instead of the visual sense of fish to move around with their back to fish that live between rocky reefs or in places where seaweed grows, or to fish collection lights. I thought it would be possible to collect fish. Therefore, the inventor of the present application has focused on “sound” that is easy to propagate in water. In other words, it is generally known that fish react sensitively to sounds and easily escape, but conversely, the present inventor has made various studies considering that there are also sounds that can attract fish. It was. As a result, a lead weight is attached to a thread such as Michite or Tegus and submerged in the sea, the weight is moved up and down by moving the thread up and down, and the weight is struck against rocks on the seabed at a certain timing. They found that they swarmed together and gathered around the sound source, and swirled around them. Therefore, the present inventor considered that an excellent fish collection effect can be obtained by oscillating a sound wave having a certain frequency at a certain timing, and further studied. As a result, the inventors succeeded in numerically specifying the frequency of the sound wave that can attract the fish effectively and the oscillation timing thereof, leading to the present invention.

  That is, the fish collecting apparatus of the present invention includes a sound wave oscillating means for intermittently oscillating a sound wave having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds for 20 milliseconds to 2 seconds. In addition, the method of collecting fish according to the present invention intermittently oscillates a sound wave having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds to attract the fish.

  Therefore, it is possible to attract the fish by generating an effective sound wave for collecting the fish. In addition, sound waves are easy to propagate in water, and the fish collection effect is demonstrated over a wide range.

  Here, the sound wave oscillating means in the fish collecting apparatus of the present invention may oscillate a sound wave by vibration, an electronic circuit for generating a sound wave signal, an amplifying means for amplifying this signal, The output sound generator may be included at least. And a recording medium on which the sound wave signal is recorded, a signal reading means for reading the signal recorded on the recording medium, an amplifying means for amplifying the signal, and a sounding body for outputting the amplified signal to the outside It is good.

  According to the present invention, the fish can be collected by a physical method of oscillating sound waves intermittently, so that it does not cause marine pollution or adversely affect the ecosystem. In addition, the transmission of sound waves does not depend on the transparency of water in the fishing grounds and fishing grounds, and since sound waves easily propagate in the water, the fish collection effect can be exerted in a wide range at various fishing grounds and fishing grounds. In addition, fish collection is performed using auditory or tactile sensations rather than visual sight of fish, so it attracts fish that live between rocky reefs and seaweeds, or fish that are migrating with their back to the fish collection device. It is also possible to collect fish efficiently.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  In the fish collection method of the present invention, a sound wave having a frequency of 20 Hz to 2 kHz is intermittently oscillated for 20 milliseconds to 2 seconds at intervals of 20 milliseconds to 2 seconds to attract the fish.

  Here, the frequency of the sound wave may be 20 Hz to 2 kHz, preferably 20 Hz to 1.5 kHz, more preferably 20 Hz to 1 kHz, still more preferably 20 Hz to 500 Hz, and further preferably 20 Hz to 200 Hz. Is most preferable. If the frequency of sound waves is less than 20 Hz, the fish collection effect cannot be expected. In addition, the fish collection effect cannot be expected even when the frequency band is over 2 kHz.

  The sound wave oscillating time may be 20 milliseconds to 2 seconds, preferably 20 milliseconds to 1 second, more preferably 20 milliseconds to 500 milliseconds, and 20 milliseconds to 250 milliseconds. More preferably, it is most preferably 20 milliseconds to 100 milliseconds. If the sound wave oscillation time is less than 20 milliseconds, the fish collection effect cannot be expected. In addition, the fish collection effect cannot be expected even when the oscillation time is longer than 2 seconds.

  The sound wave oscillation interval may be 20 milliseconds to 2 seconds, preferably 200 milliseconds to 2 seconds, more preferably 200 milliseconds to 1.5 seconds, and 200 milliseconds to 1 second. More preferably, it is most preferable to set it as 400 milliseconds-600 milliseconds. If the sound wave oscillation time is less than 20 milliseconds, the fish collection effect cannot be expected. In addition, the fish collection effect cannot be expected even when the oscillation time is longer than 2 seconds.

  Here, it is preferable that the frequency of the sound wave, the sound wave oscillation time, and the sound wave oscillation interval are fixed to a constant value within the above range, and the sound wave is intermittently generated. In this case, the fish collection effect is more easily exhibited. If the frequency of the sound wave, the sound wave oscillation time, and the sound wave oscillation interval vary greatly, it becomes difficult to exhibit the fish collection effect.

  A sound wave having a frequency of 20 Hz to 200 Hz is intermittently oscillated at intervals of 400 milliseconds to 600 milliseconds, and the sound wave frequency, the sound wave oscillation time, and the sound wave oscillation interval are set to certain values within this range. Most preferably. In this case, the fish gather linearly at the sound wave source, swim around like a vortex, and finally swim like a belly. This sound wave oscillation condition reproduces the sound wave oscillation condition in which a high fish collection effect was obtained as a result of examination by the inventors of the present application. In other words, a lead weight (No. 50-70) is attached to a thread such as Michite or Tegus and submerged in the sea, and the weight is moved up and down by moving the thread up and down, and the weight of the seabed rock (basalt) These are the conditions of the sound wave oscillation similar to the sound wave oscillation conditions when struck against andesite or basaltic andesite. As a result of examination by the inventors of the present application, it has been confirmed that a fish collection effect can be obtained by intermittently oscillating a sound wave having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds for 20 milliseconds to 2 seconds. .

  It is preferable to oscillate the sound wave in water or on the water surface. In this case, attenuation of the sound wave due to reflection of the sound wave on the water surface can be prevented, and the oscillated sound wave can be propagated over a wide range. Even when the sound wave is oscillated without being in contact with water, if the amplitude of the oscillated sound wave is large, the sound wave may enter the water to obtain a fish collecting effect. Therefore, it is not limited to collecting fish by oscillating sound waves in water or on the water surface.

  Next, a fish collecting apparatus including a sound wave oscillating means that intermittently oscillates a sound wave having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds will be specifically described with reference to FIGS. To do.

  A fish collecting apparatus 1 shown in FIG. 1 includes a sound wave oscillating unit 2 that oscillates a sound wave by vibration, and specifically includes at least a vibration generator 3 and a vibration control unit 7 that controls the vibration generator 3. Is included. In the present embodiment, the vibration generator 3 and the vibration control means 7 are fixed to the surface of the substrate 8, and the substrate 8 is accommodated in a cylindrical housing 10. A power supply unit 9 is provided on the back surface of the substrate 8 so that power is supplied to the vibration control means 7 by turning on the power switch 11.

  The vibration generator 3 is not particularly limited as long as it can oscillate a sound wave of 20 Hz to 2 kHz from the fish collector 1 by generating vibration. In the present embodiment, a case where an eccentric motor is used as an example of the vibration generator 3 will be described.

  The eccentric motor 3 includes a cylindrical DC motor 4, a rotating shaft 5 of the DC motor, and an eccentric weight 6 fixed to the end of the rotating shaft 5. The eccentric weight 6 has an asymmetric shape with respect to the rotating shaft 5, and its center of gravity is at a position eccentric from the axis center of the rotating shaft. When the eccentric motor 3 is rotated, the rotation shaft 5 is eccentrically moved to generate a centrifugal force, and as a result, vibration is generated. The vibration intensity mainly depends on the number of rotations of the eccentric motor 3, the weight of the eccentric weight 6, and the position of the center of gravity of the eccentric weight 6, and the frequency of the sound wave is appropriately controlled depending on the strength of the vibration intensity.

  The eccentric motor 3 is fixed to the surface of the substrate 8 by adhesion or the like. When the eccentric motor 3 vibrates, vibration is transmitted to the substrate 8. This vibration is further transmitted to the housing 10.

  The drive control of the eccentric motor 3 is performed by the vibration control means 7 provided on the substrate 8. Here, in this embodiment, both the eccentric motor 3 and the vibration control means 7 are provided on the substrate 8, but one or both may be provided on the inner surface of the housing 10. When both the eccentric motor 3 and the vibration control means 7 are provided on the inner surface of the housing 10, the substrate 8 can be omitted.

  The vibration control means 7 includes a rotation speed control unit 7 a that controls the rotation speed of the eccentric motor 3 and a rotation time control unit 7 b that controls the rotation time of the eccentric motor 3.

  The rotation speed control unit 7a is configured by an electronic circuit, for example. This electronic circuit may be configured to control the rotational speed of the eccentric motor 3 to a certain value, or provided with a switch or the like for making the resistance variable so that the rotational speed of the eccentric motor 3 is variable. Also good. In addition, when the sound wave of a desired frequency is obtained with the standard rotation speed of the eccentric motor 3, the rotation speed control unit 7a may be omitted.

  The rotation time control unit 7b is also configured by an electronic circuit, for example. This electronic circuit performs rotation control for intermittently rotating the eccentric motor 3 at intervals of 20 milliseconds to 2 seconds for 20 milliseconds to 2 seconds, and performs rotation control at a predetermined time within this range. Alternatively, a changeover switch or the like that can change the setting of the rotation time of the eccentric motor 3 may be provided.

  The power supply unit 9 in the present embodiment accommodates two dry batteries in series. However, the present invention is not limited to this form, and a mercury battery, a lithium battery, or the like may be used.

  The power switch 11 is not particularly limited as long as it can supply power to the vibration control means 7 in the on state. For example, in the present embodiment, the power switch 11 is provided on the surface of the substrate 8, but the switch 11 may be provided outside the housing 10. Further, an antenna (not shown) may be provided so that the power can be turned on / off by remote control.

  The casing 10 is not particularly limited as long as it houses the vibration generating means 3, the vibration control means 7, and the power supply unit 9, and has a waterproof function for preventing deterioration and failure due to water leakage.

  Here, it is preferable that the material of the substrate 8 and the housing 10 does not attenuate or block the vibration generated by the vibration generator 3. For example, plastic or the like can be used, but is not limited thereto. The fish collecting apparatus 1 may be used by floating in water, or may be used by being submerged in water. For example, the float may be fixed to the outside of the housing 10 and floated on water, or the weight may be fixed to the housing 10 and sink to the water.

  The sound wave oscillating means 2 is not limited to one that generates sound waves by vibration, and for example, the sound wave oscillating means 2 shown in FIG. 2 can also be used.

  Specifically, it includes at least an electronic circuit 13 that generates a sound wave signal, amplification means 14 that amplifies the signal, and a sounding body 15 that outputs the amplified signal to the outside. The sounding body 15 is connected to the electronic circuit 13 via the amplification means 14. Further, power is supplied from the power supply unit 9.

  The electronic circuit 13 is configured to intermittently generate a sound wave signal having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds for 20 milliseconds to 2 seconds. An example of the electronic circuit 13 is a voice synthesis IC. The sound wave signal generated in the electronic circuit 13 is input to the amplification means 14 and amplified. The amplifying unit 14 is an amplifier, for example.

  The sound wave signal amplified by the amplifying means 14 is input to the sounding body 15, and a sound wave oscillation signal is output from the sounding body 15 to oscillate the sound wave. The sounding body 15 may be, for example, an underwater speaker, but is not particularly limited as long as it can propagate sound waves into water. Moreover, you may make it further provide the volume adjuster which adjusts the magnitude | size (amplitude intensity) of a sound wave.

  By using the sound wave oscillating means 2 shown in FIG. 2, for example, a fish collecting apparatus 1 shown in FIG. In this fish collecting apparatus 1, the electronic circuit 13 and the amplification means 14 are fixed to the surface of the substrate 8, the substrate 8 is accommodated in the cylindrical housing 10, and the sounding body 15 is provided at the end of the housing 10. Yes. A power supply unit 9 is provided on the back surface of the substrate 8, and is configured to supply power to the electronic circuit 13, the amplifying unit 14, and the sounding body 15 by turning on the power switch 11.

  Here, assuming that the housing 10 has a waterproof function for preventing water leakage to the inside thereof, as shown in FIG. 3A, the fish collector 1 is floated or submerged in the water integrally with the sounding body 15. As shown in FIG. 3 (b), the sounding body 15 can be separated from the fish collecting device 1, and only the sounding body 15 is floated or submerged in water. Good. Also in this case, for example, the floating may be fixed to the outside of the housing 10 or the sounding body 15 so as to float on the water, or the weight may be fixed to the housing 10 or the sounding body 15 to sink into the water. It may be configured.

  Further, the sound wave oscillating means 2 shown in FIG. 4 may be used. The sound wave oscillating means 2 includes a recording medium 17 on which a sound wave signal is recorded, a signal reading means 18 for reading a signal recorded on the recording medium 17, an amplifying means 14 for amplifying the signal, and an output of the amplified signal to the outside. And at least the sounding body 15 to be reproduced. The signal reading means 18 is connected to the sounding body 15 via the amplification means 14. Power is supplied from the power supply unit 9.

  The recording medium 17 is, for example, a compact disk (CD), a cassette tape, a mini disk (MD), a magneto-optical disk (MO), a digital video disk (DVD), a USB memory, a floppy (registered trademark) disk, and a hard disk. A sound wave signal for intermittently oscillating a sound wave having a frequency of 20 Hz to 2 kHz at an interval of 20 milliseconds to 2 seconds is recorded for 20 milliseconds to 2 seconds.

  The signal reading means 18 is not particularly limited as long as it can read the sound wave signal recorded on the recording medium 17. For example, a device such as a compact disc player or a cassette tape player can be used. It is also possible to read a sound wave oscillation signal recorded on the recording medium 15 using a personal computer. Further, a sound wave signal may be stored in a hard disk of a personal computer and used.

  The sound wave oscillation signal read by the signal reading means 18 is transmitted to the sounding body 15 via the amplification means (amplifier) 14, and the sound wave oscillation signal is externally output from the sounding body 15 and the sound wave is oscillated.

  The sound wave transmitting means 2 shown in FIG. 4 can be a very compact fish collecting apparatus, like the fish collecting apparatus shown in FIGS. 1 and 3, if the recording medium 17, the signal reading means 18 and the amplifying means 14 are miniaturized. it can. For example, it can also be used as follows. That is, the sounding body 15 is attached to the ship bottom. The signal reading means 18 and the amplifying means 14 are installed inside the ship, for example, in the wheelhouse. Then, by reading the signal recorded on the recording medium 17 by the signal reading means 18, it is possible to oscillate sound waves from the sounding body 15 installed on the bottom of the ship and attract the fish around the ship.

  The fish collecting apparatus 1 of the present invention can be used by being attached to a fishing net such as a winding net, a stationary net, a ground net, or a bottom net, or arranged in a net. It can also be used by attaching it to a longline for longline fishing or a trawl. Thus, by using the fish collecting apparatus of the present invention, it becomes possible to dramatically improve the catch of all fishing methods. Further, according to the fish collecting apparatus of the present invention, it is possible to efficiently collect fish at a place where the fish is desired to be attracted, so that the time required for one fishing can be shortened, and it is possible to save marine fuel and to perform planned operation. You can also contribute.

  Moreover, it may be attached to a fishing line and used as a float, or may be used by being submerged in water. When used in water, a lure is attached to the housing 10 (the surface of the sounding body 15 when the sounding body 15 is used separately) or the housing 10 (sounding when the sounding body 15 is used separately) The sound wave oscillating means 2 may be mounted inside the body 15) itself as a lure. For example, in the case of the fish collection apparatus of FIG. 1 that performs sound wave oscillation by vibration, the lure periodically vibrates with the sound wave oscillation, making it easier to attract the interest of the fish and enabling more effective fish collection. become. By using the fish collecting apparatus of the present invention at the time of fishing, it is possible to collect fish without using a bait such as rice bran, so that the surroundings of the carp and the quay are not contaminated. In addition, since it is possible to fish by attracting fish without searching for a point where fish are easy to fish, even beginners can easily enjoy fishing.

  Furthermore, by using the fish collection apparatus 1 of the present invention, it is possible to expand the culture section and perform the culture. That is, according to the fish collection apparatus of the present invention, the fish collection effect is exerted in a wide range, so that the cultured fish can be gathered around the fish collection apparatus even if the culture section is enlarged. Therefore, even if the aquaculture section is enlarged, feeding and aquaculture fish can be captured in the same manner as before. Moreover, the range of action of the cultured fish is expanded by expanding the culture section, and it is possible to improve the quality of the cultured fish by increasing the amount of exercise of the cultured fish as compared with the past. In addition, it is possible to prevent diseases that are likely to occur by aquaculture in a narrow section. In addition, it is possible to collect fish by a fish collecting device and feed it at a certain place, so it becomes easy to clean the food left by cultured fish, preventing accumulation of sludge etc. on the sea floor, It becomes possible to prevent marine pollution.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, a light-emitting body such as a light-emitting diode is attached to the inside of the housing 10 or the surface of the housing 10 (or the surface of the sounding body 15 when the sounding body 15 is used separately) to additionally use the fish collection effect by light. You may make it do.

  EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

(Example 1)
From February 5, 2006 to May 30, 2006, a fish collection effect confirmation experiment was conducted in Onagawa Bay, Onagawa-cho, Oshika-gun, Miyagi Prefecture (70m south from Terama Lighthouse, 25m water depth). The sound wave is oscillated by tying a lead weight (No. 70) to Michiite, sinking this weight in sea water, and hitting the rock (andesite, basalt, or andesitic basalt) at a depth of 3 m by moving Michiite up and down. It was. The state of fish collection was observed visually.

  As a result, it was confirmed that there was an effect of attracting the fish to the sound wave oscillation source by hitting the weight against the rock at a regular interval of 6 to 7 times in 10 seconds. However, since the water temperature at this time was as low as 7 to 11 ° C. (3 m depth), fish did not move well and sufficient experimental results could not be obtained.

  Therefore, in order to confirm the effect of collecting fish in an environment where the water temperature is a little higher, a similar experiment was conducted at the same place on June 22, 2006. The water temperature at this time was 13 to 14 ° C. (3 m depth), and the air temperature was 17 to 18 ° C. In addition, since the seawater was cloudy due to the inflow of Oyashio, the fish collection state was confirmed by a fish finder.

  As a result, it was confirmed that root fish gathered at the sound wave oscillation source within 2-3 minutes from the start of fish collection by hitting the weight against the rock at a regular interval of 3-4 times in 2 seconds. Various investigations were made on the pace of hitting the weight against the rock, but it was confirmed that the highest fish collection effect could be obtained by hitting the weight against the rock at intervals of about 0.5 to 0.6 seconds.

  Next, on July 10, 2006, an experiment was conducted 9.5 miles (about 20 km) offshore (70-90 m depth) west-northwest from Onchi Bay in Onagawa Bay. The sea surface temperature at this time was 19 ° C., and the weather was cloudy. The wave height was 1 m and the wind force was 1.5 m / s. The sound was generated by oscillating a sound source that reproduced the sound of hitting a lead weight (No. 70) against a rock at intervals of about 0.5 to 0.6 seconds from a speaker submerged in a depth of about 40 m. The state of fish collection was confirmed by diving underwater.

  As a result, it was confirmed that moths and dolphins gather around the speaker in about 10 minutes after the start of sound oscillation. Moreover, it was found that fish that were about 500m away from the speakers gathered around the speakers.

  Next, an experiment was conducted at the same place on July 27, 2006. The sea surface temperature at this time was 21 ° C., and the weather was clear. The wave height was 1.5 m and the wind force was 2 m / s. Sound oscillation is performed by tying a lead weight of No. 70 to Michiite and sinking it into the sea, raising and lowering Michito and hitting the weight on a rock near the seabed 40-50 m, and fishing while oscillating the sound. We confirmed the fish collection effect.

  As a result, it was found that fish were easily caught when the weight was hit against the rock at a regular interval of about 40 times per minute. In addition, it was confirmed that various fish such as Japanese flounder, Japanese rockfish, and oysters were caught, and the size of the individual was also very large. Although we tried to further accelerate the pace of hitting the weight against the rock, the technique of hitting the weight against the rock near the seabed 40-50m by raising and lowering the mite will push the weight at a regular interval of about 40 times per minute. It was the limit to hit the rock. It was expected that a higher fish collection effect could be obtained if the weight could be struck against the rock at intervals of about 0.5 to 0.6 seconds.

(Example 2)
The fish collection device shown in FIG. 1 was used to perform a fish collection effect confirmation test when the frequency of sound waves, the sound wave oscillation interval, and the sound wave oscillation time were variously changed.

  The test site was a canal near 3-1-1 Konan, Minato-ku, Tokyo. The test period was August to November 2006. The test was performed using a fish collecting apparatus (FIG. 1) of a type that generates vibration by an eccentric motor and submerging the fish collecting apparatus in seawater.

  First, a lead weight (No. 50-70) is attached to a thread such as Michiite or Tegs, and submerged in the sea. The weight is moved up and down by moving the thread up and down, and the weight is moved from 0.5 seconds to 0.6 seconds. When sonic oscillation conditions were specified when hitting the rocks of the seabed (basalt, andesite or basaltic andesite), the frequency of the sonic waves was 20 to 200 Hz, the sonic oscillation time was 20 to 100 milliseconds, and the sonic oscillation interval. Was confirmed to be 400 milliseconds to 600 milliseconds.

  Therefore, this sound wave oscillation condition was reproduced by a fish collecting apparatus and tested.

  As a result, several hundreds of fish gathered in a straight line on the fish collector in a few minutes. After 10 minutes from the start of the fish collection, it was confirmed that the fish gathered around the fish collection device so as to swirl around, and finally swims like a belly while dancing.

  Next, the range of the frequency of the sound wave showing the fish collection effect, the range of the sound wave oscillation time, and the range of the sound wave oscillation interval were examined.

  First, the frequency range of the sound wave was examined. When the test was performed with a sound wave frequency of 200 Hz to 2 kHz, a sound wave oscillation time of 20 milliseconds to 100 milliseconds, and a sound wave oscillation interval of 400 milliseconds to 600 milliseconds, the fish collection effect was obtained, but the sound wave frequency was It was confirmed that the fish collection effect was reduced as compared with the fish collection effect in the case of 20 to 200 Hz.

  When the test was carried out with a sound wave frequency of less than 20 Hz or more than 2 kHz, a sound wave oscillation time of 20 milliseconds to 100 milliseconds, and a sound wave oscillation interval of 400 milliseconds to 600 milliseconds, the fish was confirmed far away. It was not confirmed to gather in the fish collector.

  As described above, it has been clarified that a fish collection effect is obtained when the frequency of the sound wave is 20 Hz to 2 kHz, and that a higher fish collection effect is obtained when the frequency is 20 Hz to 200 Hz.

  Next, the range of the sound wave oscillation time was examined. When the test was performed with a sound wave oscillation time of more than 100 milliseconds to 1 second, a sound wave frequency of 20 to 200 Hz, and a sound wave oscillation interval of 400 milliseconds to 600 milliseconds, a school of fish consisting of dozens of fish was collected. It began to swim straight toward the sea, and it was confirmed that the fish gathered around the fish collecting device in about 10 minutes from the start of the fish collection.

  The test was conducted with a sound wave oscillation time of more than 1 second to 2 seconds, a sound wave frequency of 20 to 200 Hz, and a sound wave oscillation interval of 400 milliseconds to 600 milliseconds. It started to swim towards the fish collector in a circle around the fish collector, and it was confirmed that the fish gathered around the fish collector in about 10 minutes. In addition, this fish collection effect hardly changed even when the frequency of the sound wave was 200 Hz to 2 kHz and the sound wave oscillation interval was more than 600 milliseconds to 1.5 seconds.

  The test was conducted with a sound wave oscillation time of less than 20 milliseconds or more than 2 seconds, a sound wave frequency of 20 to 200 Hz, and a sound wave oscillation interval of 400 milliseconds to 600 milliseconds. It was not confirmed to gather in the device. This fish collection effect hardly changed even when the sound wave frequency was 200 Hz to 2 kHz and the sound wave oscillation interval was more than 1.5 seconds to 2 seconds.

  As described above, if the sound wave oscillation time is set to 20 milliseconds to 2 seconds, a fish collection effect can be obtained. If the sound wave oscillation time is set to 20 milliseconds to 1 second, the fish collection effect is further enhanced. Was confirmed to increase further.

  Next, the range of the sonic time interval was examined. When the test was performed with a sound wave time interval of more than 600 milliseconds to 1.5 seconds, a sound wave frequency of 20 to 200 Hz, and a sound wave oscillation time of 20 to 100 milliseconds, a school of tens of fish was found. It began to swim straight toward the fish collection device, and it was confirmed that it gathered around the fish collection device in about 10 minutes from the start of fish collection. This fish collection effect hardly changed even when the sound wave frequency was 200 Hz to 2 kHz and the sound wave oscillation time was longer than 100 milliseconds to 1 second.

  When the test was conducted with a sound wave time interval of more than 1.5 seconds to 2 seconds, a sound wave frequency of 20 to 200 Hz, and a sound wave oscillation time of 20 milliseconds to 100 milliseconds, a school of 4,5 fish was obtained. About 3 groups, it started to swim toward the fish collector in a circle around the fish collector, and it was confirmed that they gathered around the fish collector in about 10 minutes. This fish collection effect hardly changed even when the sound wave frequency was 200 Hz to 2 kHz and the sound wave oscillation time was longer than 1 second to 2 seconds.

  The test was conducted with a sound wave time interval of less than 20 milliseconds or more than 2 seconds, a sound wave frequency of 20 to 200 Hz, and a sound wave oscillation time of 20 milliseconds to 100 milliseconds. It was not confirmed to gather in the device.

  As described above, if the sonic time interval is set to 20 milliseconds to 2 seconds, a fish collection effect can be obtained. By setting the sound wave time interval to 400 milliseconds to 1.5 seconds, the fish collection effect is further enhanced. It was confirmed that the fish collection effect was further enhanced.

  During the above experiment, it was confirmed that various fish (carp, rockfish, shark, flounder, dolphin, mullet) gathered in the fish collector. Among them, since mullets known as nervous fish have gathered in the fish collecting device, it is considered that according to the fish collecting device of the present invention, it is possible to collect various fish that have been difficult to collect in the past. In addition, it was confirmed by this test that a fish collection effect can be seen even for fish located at a distance of about 500 m from the fish collection apparatus. Therefore, according to the fish collecting apparatus of the present invention, it is possible to attract fish existing in a wide range efficiently.

It is the schematic which shows the fish collection apparatus provided with the sound wave oscillation means which oscillates a sound wave by vibration. It is the schematic which shows an example of a sound wave oscillation means. 3A and 3B are schematic views showing a fish collecting apparatus provided with the sound wave oscillating means of FIG. 2, FIG. 3A is a fish collecting apparatus in which a sounding body is integrally formed, and FIG. It is a figure which shows an apparatus. It is the schematic which shows the other example of a sound wave oscillation means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fish collecting apparatus 2 Sound wave oscillation means 13 Electronic circuit 14 Amplification means 15 Sounding body 17 Storage medium 18 Signal reading means

Claims (5)

  A fish collecting apparatus comprising sound wave oscillating means for intermittently oscillating a sound wave having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds for 20 milliseconds to 2 seconds.   The fish collection apparatus according to claim 1, wherein the sound wave oscillating means oscillates a sound wave by vibration.   2. The fish collecting apparatus according to claim 1, wherein the sound wave oscillating means includes at least an electronic circuit that generates a sound wave signal, an amplifying means that amplifies the signal, and a sounding body that outputs the amplified signal to the outside.   The sound wave oscillating means includes a recording medium on which a sound wave signal is recorded, a signal reading means for reading the signal recorded on the recording medium, an amplifying means for amplifying the signal, and a sound output for outputting the amplified signal to the outside. The fish collection apparatus according to claim 1, comprising at least a body.   A method for collecting fish, characterized by intermittently oscillating a sound wave having a frequency of 20 Hz to 2 kHz at intervals of 20 milliseconds to 2 seconds for 20 milliseconds to 2 seconds to attract fish.

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