CN112640821A - Sound domestication method and effect test method for large yellow croaker cultured in seawater net cage - Google Patents
Sound domestication method and effect test method for large yellow croaker cultured in seawater net cage Download PDFInfo
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- CN112640821A CN112640821A CN202011538850.9A CN202011538850A CN112640821A CN 112640821 A CN112640821 A CN 112640821A CN 202011538850 A CN202011538850 A CN 202011538850A CN 112640821 A CN112640821 A CN 112640821A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The invention provides a sound domestication method and an effect test method for large yellow croaker cultured in a seawater cage, and belongs to the technical field of marine culture. The method solves the technical problems of poor sound training effect of the large yellow croaker and the like. The sound domestication method for large yellow croakers cultured in seawater cages comprises the following steps: a. recording: recording the ingestion sound emitted by the large yellow croaker when eating in the net cage by using an underwater recording device; recording feeding original sounds with different sound pressure levels emitted by a plurality of segments of large yellow croakers when the large yellow croakers feed in a net cage; b. pre-testing: feeding records with different sound pressure levels are placed in the net cage, and the feeding record with the optimal sound pressure level is searched and determined for formal sound domestication; c. formal domestication: and playing the determined ingestion recording with the optimal sound pressure level by using the underwater sound to perform bait casting training. The training effect is good, and the training can be accurately checked.
Description
Technical Field
The invention belongs to the technical field of marine culture, and relates to a sound domestication method and an effect test method for large yellow croaker cultured in a seawater net cage.
Background
More than 1700 years ago, the large yellow croaker is taken as an edible fish by the workers in China. Since then, the production of large yellow croakers by fishing has emerged. The catching strength of the large yellow croakers is increased from the beginning of the last 50-60 years, so that the natural resources of the large yellow croakers begin to decline. In the past 70-80 s, large yellow croaker fish fields such as Lu Si Yang, Dai Dong, Da mu Yang, cat head Yang and guan Jing Yang could not form large yellow croaker flood. In order to recover large yellow croaker resources, the country adopts measures such as artificial breeding, proliferation and releasing. In order to improve the releasing survival rate of the large yellow croakers, the fry can be moved into a releasing sea area before releasing and temporarily cultured by using a seawater net cage, so that the fry is suitable for the marine environment. The large yellow croaker is very sensitive to sound, and the underwater sound reproduction equipment is used for sound domestication of the temporarily-cultured large yellow croaker in the net cage, so that the sound emitted by the net cage is subjected to conditioned reflection, and the large yellow croaker fry is not far away from a release sea area after release, thereby being beneficial to improving the release efficiency of the release sea area.
In the acoustic domestication process, the domestication effect needs to be verified, so a domestication effect test method needs to be designed.
Chinese patent (publication No. CN 111642443A; bulletin date: 2020-09-11) discloses a conveniently-adjusted sound behavior controller for marine ranching fishes, which comprises a floating plate, the lower end of the floating plate is connected with an adjusting main body, a position adjusting mechanism comprises a power pump and a direction adjusting motor, the power pump and the direction adjusting motor are both fixedly connected with the adjusting main body, the rotating part of the direction adjusting motor is fixedly connected with a direction adjusting rudder, a feed box is arranged on the floating plate, the upper end of the feed box is connected with a feed cover through a connecting piece, a switch handle is arranged on the feed cover, a magnetic plate I and a magnetic plate II are respectively arranged on the feed cover and the feed box, a feed homogenizing mechanism comprises a homogenizing motor, the homogenizing motor is fixedly connected with the adjusting main body, a homogenizing groove for homogenizing feed is arranged in the adjusting main body, the rotating part of the homogenizing motor is connected with a homogenizing rod piece, the connecting plate is connected with the rotating part of the uniform motor, the lower end of the uniform groove is provided with a uniform plate, uniform feeding holes are uniformly distributed on the uniform plate, and the lower end of the uniform plate is provided with a sound emitter.
The above patent documents do not disclose a specific acclimatization method, nor a method for testing the acclimatization effect.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a sound domestication method for large yellow croakers cultured in a seawater cage, and the technical problems to be solved by the invention are as follows: how to improve the proliferation and releasing effect of the large yellow croaker cultured in the seawater net cage.
The purpose of the invention can be realized by the following technical scheme:
a method for domesticating large yellow croakers cultured in a seawater net cage in a sound way is characterized in that large yellow croakers cultured in the seawater net cage in the domestication method are domesticated in the sound way by using large yellow croakers sound domestication equipment, the domestication equipment comprises underwater recording equipment, an outdoor power supply, a power supply connecting wire, a power amplifier and an underwater sound, and the underwater recording equipment, the power amplifier and the underwater sound are all connected with the outdoor power supply through the power supply connecting wire, and the domestication method comprises the following steps:
a. recording: recording the ingestion sound emitted by the large yellow croaker when eating in the net cage by using an underwater recording device; recording feeding original sounds with different sound pressure levels emitted by a plurality of segments of large yellow croakers when the large yellow croakers feed in a net cage;
b. pre-testing: feeding records with different sound pressure levels are placed in the net cage, and the feeding record with the optimal sound pressure level is searched and determined for formal sound domestication;
c. formal domestication: and playing the determined ingestion recording with the optimal sound pressure level by using the underwater sound to perform bait casting training.
The working principle is as follows: the sea area environment of the large yellow croaker for each releasing work is different, so that the domestication factor cannot be fixed at a certain value and needs to be adjusted according to actual conditions. In the acclimation method, sound with a fixed frequency is not selected for acclimation. And recording the ingestion sound generated when the large yellow croaker eats in the net cage by using an underwater recording device, and performing acclimatization by using the ingestion sound. And (3) performing a preliminary test before acclimation, placing ingestion primary sounds with different sound pressure levels in the net cage, and searching and determining the optimal sound pressure level for formal sound acclimation. The domestication method needs to make the fry gradually generate conditioned reflex to sound by means of bait casting, and finally generates better domestication effect.
In the method for domesticating the sound equipment for culturing the large yellow croakers in the seawater net cage, the domesticating equipment further comprises a bait casting machine, in the step a, the underwater recording equipment is placed in the net cage, bait casting is carried out by the bait casting machine, and ingestion original sound emitted by the large yellow croakers in the net cage is recorded.
In the method for domesticating the large yellow croaker cultured in the seawater net cage, in the step a, at least three sections of feeding raw sounds with different sound pressure levels, which are generated when the large yellow croaker is fed in the net cage, are recorded by using an underwater recording device.
In the method for domesticating the acoustics for culturing the large yellow croaker in the seawater net cage, in the step b, recorded ingestion original sound is played in the net cage by using the underwater acoustics, the sound pressure level of sound reproduction is continuously adjusted, the fry reaction is observed, and the optimal sound pressure level is determined.
In the method for acoustic domestication of large yellow croakers cultured in a seawater cage, in the step c, the method is divided into three stages, namely domestication before feeding, domestication during feeding and domestication after feeding; the domestication and sound reproduction process completely comprises the whole bait casting process.
In the above acoustic domestication method for large yellow croakers cultured in a seawater cage, in step c, the domestication stage before feeding: starting an underwater sound box, playing recorded original sound in the net cage for 2 minutes at the optimal sound pressure level, stopping sound reproduction after the domestication is finished before feeding, and starting feeding by using a feeding machine after 2 minutes; domestication stage during feeding: the bait casting time is set to be 2 minutes, the bait is cast near the sound source, the information of the bait is provided for a place which gives sound for the fry, the impression of the fry on the sound is deepened, and meanwhile, the ingestion sound is played for 2 minutes. Stopping sounding after finishing domestication during feeding, and closing the feeding machine; after 2 minutes, a post-baiting acclimatization stage was performed: playing ingestion original sound for 2 minutes to deepen the impression of the fry on the played sound; after the three-stage domestication is finished, all equipment is closed, the fry is stood for 5 to 10 minutes, so that the fry is calmed, personnel go into the net cage, and various equipment is detached.
In the process of attracting and trapping the fry by sound, a fry gathering peak value exists, namely the number of the trapped fries is basically stable and does not change any more. After each domestication work is finished, the condition video in the net cage in the domestication process recorded in the motion camera is analyzed in time, and the time when the number of gathered fries reaches the peak value is recorded for later-stage detection of the domestication effect.
The invention also provides a test method for domestication effect of sound equipment for culturing large yellow croakers in seawater cages, which is characterized in that the test method is carried out on the basis of the domestication method, the test method comprises underwater sound recording equipment, video recording equipment, an outdoor power supply, a power supply connecting wire, a power amplifier and underwater sound equipment, the underwater sound recording equipment, the video recording equipment, the power amplifier and the underwater sound equipment are all connected with the outdoor power supply through the power supply connecting wire, the video recording equipment is a motion camera, and the test method comprises the following steps:
a. playing the ingestion record of the large yellow croaker by using an underwater sound device, and recording fry gathering time; wherein, in the process of attracting and trapping the fry by sound, a fry gathering peak value exists, namely, the number of the trapped fries is kept stable when the number of the trapped fries is basically stable and no change exists, and the starting time is the fry gathering time;
b. changing the position of a sound source, playing the ingestion record of the large yellow croaker, and recording the fry gathering time;
c. repeating the step b; and calculating the average value of fry aggregation time, playing the ingestion record of the large yellow croaker after each change of the position, and proving that the large yellow croaker is domesticated when the average value of fry aggregation reaches the peak value.
In the detection method, the domestication effect is comprehensively judged by recording the fry gathering time and changing the position of the sound source, so that the detection accuracy is improved.
In the technical scheme, the power amplifier adopts a product with a brand name of TOOBOO AS-1350; in the technical scheme, a GoPro motion camera with a name brand of GoPro HERO7 Black is adopted; the underwater sound adopts a sound with a name plate type of TOOBOO AS-1100; the underwater recording equipment adopts a nameplate type BK 8106 hydrophone.
Since the large yellow croaker is sensitive to sound, in order to ensure that the domestication work is carried out smoothly and reduce the external influence as much as possible, a GoPro motion camera is selected to shoot, record and domesticate the process, and then observation and analysis are carried out after the domestication process is finished, so that the external interference is reduced and the accuracy is improved.
In the method for testing the acoustic domestication effect of the large yellow croaker cultured in the seawater net cage, equipment is also needed before the step a, and preparation work before domestication is carried out each time is as follows: fixing the overwater working platform or ship beside the net cage, fixing the video recording equipment on the net cage, connecting the outdoor power supply, the power amplifier and the underwater sound equipment, putting and fixing the underwater sound equipment in the net cage, starting the video recording equipment, enabling all personnel to return to the working platform or the ship, closing all mechanical equipment, standing for 5 minutes, and enabling the fry in the net cage to recover to a normal calm state, so that the preparation work before the domestication is completed.
In the method for testing the domestication effect of the sound equipment for culturing the large yellow croakers in the seawater net cage, the number of the underwater sound equipment and the number of the video equipment are two, and the underwater sound equipment and the video equipment are arranged in a one-to-one correspondence manner; when preparing before domestication, one underwater sound device is placed at the position of a sound source for original domestication work and fixed, the other underwater sound device is placed at the opposite side and fixed, and meanwhile, video equipment is fixed at the opposite side; domestication before feeding, domestication during feeding, domestication after feeding still uses an underwater sound with the original sound source position, and does not use a side sound; after the domestication before feeding is finished, the original sound source position sound is closed, the domestication sound is continuously played for 2 minutes by using the opposite sound, the domestication is stopped for 2 minutes after the playing is finished, and then the domestication work of the original sound source position is continuously carried out; when the video of the domestication process is analyzed in the later stage, the time from the position of the domestication sound source to the position of the detection sound source when the number of the positions of the detection sound sources reaches the fry gathering peak value is recorded; because the fry is domesticated and played before bait casting, the fry is induced and collected from the lower layer to the upper layer of the net cage, the fry only moves in a plane in the process of inspection, and an expected value of the inspection gathering time is calculated according to the proportional relation between the moving distance in the domestication process and the moving distance in the inspection process and the stable numerical value of the gathering time of the fry; and (5) carrying out multiple tests, and if the fry aggregation time in the test process recorded for multiple times is close to the expected value, verifying that the domestication is effective.
Compared with the prior art, the invention has the following advantages:
1. the domestication method of the invention does not select sound with fixed frequency for domestication. And recording the ingestion sound generated when the large yellow croaker eats in the net cage by using an underwater recording device, and performing acclimatization by using the ingestion sound. And (3) performing a preliminary test before acclimation, placing ingestion primary sounds with different sound pressure levels in the net cage, and searching and determining the optimal sound pressure level for formal sound acclimation. The domestication method needs to make the fry gradually generate conditioned reflex to sound by means of bait casting, and finally generates better domestication effect.
2. According to the detection method, a GoPro motion camera is selected for shooting, recording and domesticating processes, observation and analysis are performed after the GoPro motion camera is finished, external interference is reduced, and accuracy is improved.
3. The detection method can improve the accuracy through multiple detections at different positions.
Drawings
Fig. 1 is a schematic structural diagram of equipment used in the acclimatization method in the first embodiment.
Fig. 2 is a schematic structural diagram of an apparatus used in the inspection method according to the second embodiment.
In the figure, 1, underwater sound equipment; 2. a video recording device; 3. an outdoor power supply; 4. a power connection line; 5. a power amplifier.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1, this embodiment provides a method for domesticating large yellow croakers cultured in a seawater cage, in which a large yellow croaker acoustic domestication device is used to perform acoustic domestication on the large yellow croakers cultured in the seawater cage, the domestication device includes an underwater recording device, an outdoor power supply 3, a power connection line 4, a power amplifier 5 and an underwater sound 1, the underwater recording device, the power amplifier 5 and the underwater sound 1 are all connected to the outdoor power supply 3 through the power connection line 4, and the domestication method includes the following steps:
a. recording: recording the ingestion sound emitted by the large yellow croaker when eating in the net cage by using an underwater recording device; recording feeding original sounds with different sound pressure levels emitted by a plurality of segments of large yellow croakers when the large yellow croakers feed in a net cage;
b. pre-testing: feeding records with different sound pressure levels are placed in the net cage, and the feeding record with the optimal sound pressure level is searched and determined for formal sound domestication;
c. formal domestication: and playing the determined ingestion record with the optimal sound pressure level by using the underwater sound 1 to perform bait casting training.
The working principle is as follows: the sea area environment of the large yellow croaker for each releasing work is different, so that the domestication factor cannot be fixed at a certain value and needs to be adjusted according to actual conditions. In the acclimation method, sound with a fixed frequency is not selected for acclimation. And recording the ingestion sound generated when the large yellow croaker eats in the net cage by using an underwater recording device, and performing acclimatization by using the ingestion sound. And (3) performing a preliminary test before acclimation, placing ingestion primary sounds with different sound pressure levels in the net cage, and searching and determining the optimal sound pressure level for formal sound acclimation. The domestication method needs to make the fry gradually generate conditioned reflex to sound by means of bait casting, and finally generates better domestication effect.
And further, the domestication equipment also comprises a bait casting machine, in the step a, the underwater recording equipment is placed into the net cage, the bait casting machine is used for casting bait, and the ingestion sound of the large yellow croaker in the net cage is recorded.
In the step a, at least three sections of feeding raw sounds of large yellow croakers with different sound pressure levels, which are emitted when the large yellow croakers are fed in the net cage, are recorded by using an underwater recording device; in the step b, recorded ingestion original sound is played in the net cage by using the underwater sound equipment 1, the sound pressure level of sound reproduction is continuously adjusted, the fry reaction is observed, and the optimal sound pressure level is determined; in the step c, three stages are divided into domestication before feeding, domestication during feeding and domestication after feeding; the domestication and sound reproduction process completely comprises the whole bait casting process.
In step c, a pre-baiting acclimatization stage: starting an underwater sound box 1, playing recorded net cage ingestion original sound for 2 minutes at the optimal sound pressure level, stopping sound release after the domestication is finished before feeding, and starting feeding by using a feeding machine after 2 minutes; domestication stage during feeding: the bait casting time is set to be 2 minutes, the bait is cast near the sound source, the information of the bait is provided for a place which gives sound for the fry, the impression of the fry on the sound is deepened, and meanwhile, the ingestion sound is played for 2 minutes. Stopping sounding after finishing domestication during feeding, and closing the feeding machine; after 2 minutes, a post-baiting acclimatization stage was performed: playing ingestion original sound for 2 minutes to deepen the impression of the fry on the played sound; after the three-stage domestication is finished, all equipment is closed, the fry is stood for 5 to 10 minutes, so that the fry is calmed, personnel go into the net cage, and various equipment is detached. In the process of attracting and trapping the fry by sound, a fry gathering peak value exists, namely the number of the trapped fries is basically stable and does not change any more. After each domestication work is finished, the condition video in the net cage in the domestication process recorded in the motion camera is analyzed in time, and the time when the number of gathered fries reaches the peak value is recorded for later-stage detection of the domestication effect.
Example two
The embodiment provides a method for testing the domestication effect of a sound system for large yellow croaker cultured in a seawater cage, which is carried out on the basis of the domestication method in the first embodiment, wherein the method comprises an underwater sound recording device, a video recording device 2, an outdoor power supply 3, a power supply connecting wire 4, a power amplifier 5 and an underwater sound system 1, the underwater sound recording device, the video recording device 2, the power amplifier 5 and the underwater sound system 1 are all connected with the outdoor power supply 3 through the power supply connecting wire 4, the video recording device 2 is a motion camera, and the method comprises the following steps:
a. playing the ingestion record of the large yellow croaker by using the underwater sound 1, and recording fry gathering time; wherein, in the process of attracting and trapping the fry by sound, a fry gathering peak value exists, namely, the number of the trapped fries is kept stable when the number of the trapped fries is basically stable and no change exists, and the starting time is the fry gathering time;
b. changing the position of a sound source, playing the ingestion record of the large yellow croaker, and recording the fry gathering time;
c. repeating the step b; and calculating the average value of fry aggregation time, playing the ingestion record of the large yellow croaker after each change of the position, and proving that the large yellow croaker is domesticated when the average value of fry aggregation reaches the peak value.
In the detection method, the domestication effect is comprehensively judged by recording the fry gathering time and changing the position of the sound source, so that the detection accuracy is improved.
In this embodiment, the power amplifier 5 is a product with a brand name of TOOBOO AS-1350; in the technical scheme, a GoPro motion camera with a name brand of GoPro HERO7 Black is adopted; the underwater sound 1 adopts a sound with a name plate type of TOOBOO AS-1100; the underwater recording equipment adopts a nameplate type BK 8106 hydrophone. Since the large yellow croaker is sensitive to sound, in order to ensure that the domestication work is carried out smoothly and reduce the external influence as much as possible, a GoPro motion camera is selected to shoot, record and domesticate the process, and then observation and analysis are carried out after the domestication process is finished, so that the external interference is reduced and the accuracy is improved.
Before the step a, equipment work is carried out, and preparation work before the domestication work is carried out each time is as follows: fixing an overwater working platform or a ship beside a net cage, fixing a video recording device 2 on the net cage, connecting an outdoor power supply 3, a power amplifier 5 and an underwater sound box 1, putting the underwater sound box 1 into the net cage and fixing the underwater sound box in the net cage, starting the video recording device 2, enabling all personnel to return to the working platform or the ship, closing all mechanical devices, standing for 5 minutes, and enabling the fry in the net cage to be restored to a normal and calm state, so that the preparation work before the domestication is completed.
In the embodiment, the number of the underwater sound equipment 1 and the number of the video equipment 2 are two, and the underwater sound equipment 1 and the video equipment 2 are arranged in a one-to-one correspondence manner; when preparing before domestication, one underwater sound device 1 is placed at the position of a sound source for original domestication work and fixed, the other underwater sound device 1 is placed at the opposite side and fixed, and meanwhile, a video device 2 is fixed at the opposite side; domestication before feeding, domestication during feeding, and domestication after feeding still uses an underwater sound device 1 with the original sound source position, and does not use a side sound device; after the domestication before feeding is finished, the original sound source position sound is closed, the domestication sound is continuously played for 2 minutes by using the opposite sound, the domestication is stopped for 2 minutes after the playing is finished, and then the domestication work of the original sound source position is continuously carried out; when the video of the domestication process is analyzed in the later stage, the time from the position of the domestication sound source to the position of the detection sound source when the number of the positions of the detection sound sources reaches the fry gathering peak value is recorded; because the fry is domesticated and played before bait casting, the fry is induced and collected from the lower layer to the upper layer of the net cage, the fry only moves in a plane in the process of inspection, and an expected value of the inspection gathering time is calculated according to the proportional relation between the moving distance in the domestication process and the moving distance in the inspection process and the stable numerical value of the gathering time of the fry; and (5) carrying out multiple tests, and if the fry aggregation time in the test process recorded for multiple times is close to the expected value, verifying that the domestication is effective.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A method for domesticating large yellow croakers cultured in a seawater net cage is characterized in that large yellow croakers cultured in the seawater net cage are domesticated acoustically by using large yellow croaker acoustic domestication equipment, the domestication equipment comprises underwater recording equipment, an outdoor power supply (3), a power supply connecting wire (4), a power amplifier (5) and an underwater acoustic (1), the underwater recording equipment, the power amplifier (5) and the underwater acoustic (1) are all connected with the outdoor power supply (3) through the power supply connecting wire (4), and the domestication method comprises the following steps:
a. recording: recording the ingestion sound emitted by the large yellow croaker when eating in the net cage by using an underwater recording device; recording feeding original sounds with different sound pressure levels emitted by a plurality of segments of large yellow croakers when the large yellow croakers feed in a net cage;
b. pre-testing: feeding records with different sound pressure levels are placed in the net cage, and the feeding record with the optimal sound pressure level is searched and determined for formal sound domestication;
c. formal domestication: and playing the determined ingestion record with the optimal sound pressure level by using the underwater sound (1) to carry out bait casting training.
2. The acoustic domestication method for large yellow croaker cultured in a seawater cage as claimed in claim 1, wherein the domestication device further comprises a bait casting machine, and in the step a, the underwater recording device is placed in the cage, and bait casting is performed by the bait casting machine to record ingestion sound of the large yellow croaker in the cage.
3. The sound domestication method for large yellow croaker cultured in a seawater cage as claimed in claim 1 or 2, wherein in step a, at least three sections of feeding raw sounds of different sound pressure levels of the large yellow croaker fed in the cage are recorded by using an underwater recording device.
4. The method for domesticating the acoustics of the large yellow croaker cultured in the seawater net cage according to claim 1 or 2, wherein in the step b, recorded ingestion original sound is played in the net cage by using the underwater acoustics (1), the sound pressure level of sound reproduction is continuously adjusted, the fry reaction is observed, and the optimal sound pressure level is determined.
5. The acoustic domestication method for large yellow croaker in seawater cage culture according to claim 1 or 2, wherein in step c, three stages are divided, namely domestication before feeding, domestication during feeding, and domestication after feeding; the domestication and sound reproduction process completely comprises the whole bait casting process.
6. The acoustic domestication method for large yellow croaker cultured in seawater cages according to claim 5, wherein in step c, the domestication stage before feeding: starting an underwater sound box (1), playing recorded feeding original sound in the net cage for 2 minutes at the optimal sound pressure level, stopping sound release after the domestication is finished before feeding, and starting feeding by using a feeding machine after 2 minutes; domestication stage during feeding: the bait casting time is set to be 2 minutes, the bait is cast near the sound source, the information of the bait is provided for a place which gives sound for the fry, the impression of the fry on the sound is deepened, and meanwhile, the ingestion sound is played for 2 minutes. Stopping sounding after finishing domestication during feeding, and closing the feeding machine; after 2 minutes, a post-baiting acclimatization stage was performed: playing ingestion original sound for 2 minutes to deepen the impression of the fry on the played sound; after the three-stage domestication is finished, all equipment is closed, the fry is stood for 5 to 10 minutes, so that the fry is calmed, personnel go into the net cage, and various equipment is detached.
7. The method for testing the domestication effect of the sound equipment for culturing the large yellow croakers in the seawater net cage is characterized by comprising underwater sound recording equipment, video recording equipment (2), an outdoor power supply (3), a power supply connecting wire (4), a power amplifier (5) and the sound equipment (1) under water, wherein the underwater sound recording equipment, the video recording equipment (2), the power amplifier (5) and the sound equipment (1) under water are all connected with the outdoor power supply (3) through the power supply connecting wire (4), the video recording equipment (2) is a motion camera, and the method comprises the following steps:
a. playing the ingestion record of the large yellow croaker by using an underwater sound device (1), and recording fry gathering time; wherein, in the process of attracting and trapping the fry by sound, a fry gathering peak value exists, namely, the number of the trapped fries is kept stable when the number of the trapped fries is basically stable and no change exists, and the starting time is the fry gathering time;
b. changing the position of a sound source, playing the ingestion record of the large yellow croaker, and recording the fry gathering time;
c. repeating the step b; and calculating the average value of fry aggregation time, playing the ingestion record of the large yellow croaker after each change of the position, and proving that the large yellow croaker is domesticated when the average value of fry aggregation reaches the peak value.
8. The method for testing the domestication effect of the marine cage culture large yellow croaker sound device according to claim 7, wherein there is equipment work before step a, and the preparation work before each domestication work is: fixing a water work platform or a ship beside a net cage, fixing a video device (2) on the net cage, connecting an outdoor power supply (3), a power amplifier (5) and an underwater sound device (1), putting the underwater sound device (1) into the net cage and fixing the underwater sound device in the net cage, starting the video device (2), enabling all personnel to return to the work platform or the ship, closing all mechanical devices, standing for 5 minutes, and enabling fry in the net cage to recover to a normal calm state, so far, completing preparation work before domestication.
9. The method for testing the domestication effect of the marine cage culture large yellow croaker sound box according to claim 8, wherein the number of the underwater sound boxes (1) and the number of the video recording devices (2) are two, and the underwater sound boxes (1) and the video recording devices (2) are arranged in a one-to-one correspondence manner; when preparing before domestication, one underwater sound device (1) is placed at the position of a sound source for original domestication work to be fixed, the other underwater sound device (1) is placed at the opposite side to be fixed, and meanwhile, a video device (2) is fixed at the opposite side; domestication before feeding, domestication during feeding, and domestication after feeding still uses an underwater sound (1) with the original sound source position, and does not use a side sound; after the domestication before feeding is finished, the original sound source position sound is closed, the domestication sound is continuously played for 2 minutes by using the opposite sound, the domestication is stopped for 2 minutes after the playing is finished, and then the domestication work of the original sound source position is continuously carried out; when the video of the domestication process is analyzed in the later stage, the time from the position of the domestication sound source to the position of the detection sound source when the number of the positions of the detection sound sources reaches the fry gathering peak value is recorded; because the fry is domesticated and played before bait casting, the fry is induced and collected from the lower layer to the upper layer of the net cage, the fry only moves in a plane in the process of inspection, and an expected value of the inspection gathering time is calculated according to the proportional relation between the moving distance in the domestication process and the moving distance in the inspection process and the stable numerical value of the gathering time of the fry; and (5) carrying out multiple tests, and if the fry aggregation time in the test process recorded for multiple times is close to the expected value, verifying that the domestication is effective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538850.9A CN112640821A (en) | 2020-12-23 | 2020-12-23 | Sound domestication method and effect test method for large yellow croaker cultured in seawater net cage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011538850.9A CN112640821A (en) | 2020-12-23 | 2020-12-23 | Sound domestication method and effect test method for large yellow croaker cultured in seawater net cage |
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