CN106818573B - Sea-caught wild swimming crab sand pond fattening breeding method - Google Patents
Sea-caught wild swimming crab sand pond fattening breeding method Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
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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
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- Biodiversity & Conservation Biology (AREA)
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- Farming Of Fish And Shellfish (AREA)
Abstract
The invention belongs to the field of aquaculture, and particularly discloses a sea catching wild swimming crab sand pool fattening breeding method which comprises the steps of preparing a temporary breeding pool, spreading sand into the temporary breeding pool, injecting water, selecting crab seeds and feeding twice a day, wherein female crabs caught from crab cages in sea areas can be selected to reduce the death rate and disability rate, and female crabs which have been subjected to exuviation and mating can realize high-density breeding; the dissolved oxygen is increased by dispersing the introduced air to meet the aerobic characteristics of the wild swimming crabs, and the seawater turbulence degree is enhanced to inhibit the water quality deterioration; the circulating water pipeline accelerates the renewal and flow of seawater, inhibits the deterioration of water quality and promotes the dispersion of air; the water filter effectively removes organic matters and other pollutants in seawater, kills pathogenic organisms such as bacteria and the like, and reduces the occurrence of diseases; the residual baits and the sick and wounded crabs in the temporary rearing pond are collected by draining twice every day, and the water quality deterioration and the disease transmission are inhibited. In a word, the disease rate and the death rate of the portunids are reduced, the fattening growth and the quality of the wild portunids are promoted, and the economic benefit is improved.
Description
Technical Field
The invention belongs to the field of aquaculture, and particularly relates to a sand pond fattening breeding method for sea-caught wild swimming crabs.
Background
The portunus trituberculatus also called portunus trituberculatus, is large in body and meat, delicious in taste and rich in nutrition, is distributed in Bohai Bay, Jiangsu, Zhejiang and Fujian coastal areas, is a main fishing object in marine fishery, and is also one of important export-marketing aquatic products in China. Usually, the wild portunid in the natural sea area is in the vigorous growing season in 9-10 months every year, but the portunid is insufficient in fullness, relatively poor in quality and low in price at the moment because the cream growing season is not reached, the average price of the portunid purchased from a fishing boat is less than 10 yuan/kg, and some wild portunid in the shelling period are too low in fullness and can only be treated as fertilizer, so that the resource waste is greatly caused. If female crabs of the wild portunids caught by the sea at this stage can be temporarily raised for 2-3 months to fatten, the quality of the portunids is improved, and then the wild portunids are listed in spring festival, the average price per kilogram can reach 150-200 yuan, and the value of the wild portunids caught by the sea is greatly improved. However, the wild swimming crabs caught in the sea are usually injured in the operation and transportation process, and have strong wildness, the living habits of the wild swimming crabs caught in the sea are different from those of artificially cultured swimming crabs, so that the requirements on the environment and food are high, the wild swimming crabs caught in the sea are also easily affected by the deterioration of the water quality of a culture pond or other diseases, the morbidity and the mortality are high, and the temporary culture fattening benefits of the wild swimming crabs caught in the sea are reduced.
Chinese patent CN10610628A, entitled pond natural ecological cultivation method of portunid, which is published on 2016, 11, 16, discloses a cultivation method for jointly stocking portunid fries, shellfish, grass carp and shrimp fries in a cultivation pond to form a symbiotic water system and recycle nutrient substances, wherein a water tank and the like are arranged in the cultivation pond. However, the culture object of the pond natural ecological culture method is an artificial swimming crab seedling, and is not suitable for fattening and temporarily culturing wild swimming crabs, particularly adult wild swimming crabs in 9-10 months.
Disclosure of Invention
Aiming at the problems that wild portunids captured in the sea are strong in wildness, high in requirement on culture environment and high in disease rate and death rate caused by deterioration of water quality or influence of diseases, the invention aims to provide a fattening culture method for wild portunids captured in the sea, which reduces the morbidity and death rate of the wild portunids and improves the fullness, and the economic value of the wild portunids captured in the sea is improved.
The invention provides the following technical scheme:
a sand pond fattening breeding method for sea-caught wild swimming crabs comprises the following steps:
(1) preparing a temporary culture pond: the temporary culture pond (1) is 10-20 m wide and 20-40 m long, a plurality of aerators (3) are arranged in the pond, the aerators are connected with an air compression pump (4) through an air duct, a gravel layer is arranged at the bottom of the temporary culture pond, the thickness of the gravel layer is 15-25 cm, the particle size of the gravel is 0.6-1.2 cm, a water purification pond (2) for containing seawater is arranged on the side of the temporary culture pond, bleaching powder solution with the mass concentration of 1-4% is sprayed into the temporary culture pond for disinfection, and then the temporary culture pond is exposed for 3-5 days;
(2) sand paving and water injection: injecting seawater in the clean water tank into the sterilized temporary culture tank, keeping the water depth in the temporary culture tank to be 40-50 cm higher than the gravel layer, and introducing dispersed air into the temporary culture tank through an aerator;
(3) selecting and transporting wild crabs: selecting healthy wild portunids captured from the crab pot in the sea area in 9-10 months, selecting female crabs which have the weight of at least 200 g/crab and complete exuviation and mating, binding the chela feet of the female crabs by rubber bands, and transporting the female crabs at normal temperature by using a running water ship or a running water vehicle;
(4) putting wild crabs: removing the disabled limbs and the injured individuals and removing the rubber bands according to the ratio of 20-30 per m2The female crabs are put into a temporary rearing pond for temporary rearing at the rearing density;
(5) feeding the feed: feeding the small trash fish baits which are kept fresh by a refrigerator twice every day according to the weight of 4-10% of the weight of the wild crabs in the temporary rearing pond, wherein the feeding time is 7-8 am and 6-7 pm respectively.
Female crabs which have completed molting and mating are selected to avoid mutual killing among individuals, and the method is suitable for high-density breeding. The wild crabs are directly selected from the crab cages in the sea area and transported by a running water truck or a running water ship, so that the disability rate and the disease rate of the wild crabs are reduced, and the healthy wild crabs are more favorable for improving the survival rate. The seawater enters the water purifying tank to remove toxic and harmful substances and then flows into the temporary culture tank, and the salinity and the temperature of the seawater are proper, so that the seawater is suitable for the growth of the wild shuttles. The aerator is used for introducing air into the temporary culture pond, so that the dissolved oxygen of seawater in the temporary culture pond can be improved, and the aerobic property of the wild swimming crabs can be met. Meanwhile, the air introduced by dispersion increases the turbulent flow of seawater in the temporary rearing pond, promotes seawater mixing, inhibits the water quality deterioration of seawater, and improves the food intake of wild swimming crabs. The small trash fish is suitable for the dietary characteristics of the wild swimming crabs, and the fattening effect is improved. The gravel layer can meet the sand-submerging habit of the wild portunids, and the gravel with larger grain diameter is beneficial to the flow of seawater and air at the bottom of the temporary rearing pond, particularly avoids the accumulation of residual baits at the bottom of the pond and keeps good water quality.
As a preferred aspect of the present invention, the aerator aerates every 2 hoursAeration rate of 0.8-1.5 m for 1 hour3And h, the number of the aerators is 6-10 per mu. The intermittent aeration of the aerator keeps higher oxygen content in water, and meanwhile, the plurality of aerators are arranged to help the wild swimming crabs to disperse.
Preferably, the step (1) further comprises a circulating water pipeline (5), a water filter (51) is arranged in the circulating water pipeline, the temporary rearing pond and the water filter are connected in series in the circulating water pipeline, and the seawater in the temporary rearing pond circularly flows through the circulating water pipeline at the volume flow rate of 3-8%/h.
Partial seawater in the temporary culture pond flows circularly by arranging the circulating water pipe so as to accelerate the flow and the update of the water body, inhibit the deterioration of the water quality and promote the uniform dispersion effect of the introduced air. The water filter in the circulating water pipeline filters the passing seawater, effectively removes organic matters and other pollutants in the water, and keeps the water quality of the temporary rearing pond good.
Preferably, the potassium permanganate disinfectant with the mass concentration of 0.3-0.5% is added into the water filter, and an ultraviolet lamp is arranged on the inner side wall of the water filter. By adding the potassium permanganate disinfectant and arranging the ultraviolet lamp, the seawater flowing through is sterilized and disinfected, pathogenic organisms such as bacteria and the like are killed, and the occurrence of diseases is reduced.
Preferably, the biological flocculant NOC-1 is added into the seawater of the clean water tank, and a filter screen is arranged at the water outlet of the clean water tank. The microbial flocculant can effectively remove toxic and harmful substances in seawater and improve the cleanness degree of the seawater.
Preferably, the seawater in the temporary culture pond is drained twice every day, the draining time is 6-7 points in the morning and 5-6 points in the evening, residual baits, dead crabs and injured crabs in the temporary culture pond are picked up after the draining, and then the seawater in the water purification pond is used for supplementing. Draining water in time, removing residual bait, dead crabs and injured crabs, keeping the temporary rearing pond clean, inhibiting water quality deterioration and disease propagation, and improving the survival rate of wild swimming crabs.
The invention has the following beneficial effects:
the sand pond fattening breeding method for the sea-caught wild swimming crabs has the following advantages: 1) the death rate and disability rate of female crabs caught from the crab cages in the sea area can be reduced by selecting the female crabs, and the female crabs which have completed molting and mating can be cultured in high density; 2) the dissolved oxygen is increased by dispersing the introduced air to meet the aerobic characteristics of the wild crabs, and the seawater turbulence degree is enhanced to inhibit the water quality deterioration; 3) the circulating water pipeline accelerates the renewal and flow of seawater, inhibits the deterioration of water quality and promotes the dispersion of air; 4) the water filter effectively removes organic matters and other pollutants in seawater, kills pathogenic organisms such as bacteria and the like, and reduces the occurrence of diseases; 5) the residual baits and the sick and wounded crabs in the temporary rearing pond are collected by draining twice every day, and the water quality deterioration and the disease transmission are inhibited. In a word, the sand pond fattening breeding method for the sea-caught wild swimming crabs reduces the disease rate and the death rate of the swimming crabs, promotes the fattening growth and the quality of the wild swimming crabs, and improves the economic benefit.
Drawings
FIG. 1 is a structural view of the arrangement of temporary rearing pond and water inlet and outlet pipes.
In the figure: 1. the temporary culture pond comprises a temporary culture pond 2, a water purification pond 3, an aerator 4, an air compression pump 5, a circulating water pipeline 51, a water filter 52 and a water pump, wherein the direction of an arrow is the water flowing direction.
Detailed Description
The following further describes embodiments of the present invention:
the starting materials used in the present invention are either commercially available or commonly used in the art, unless otherwise specified, and the procedures described in the examples below are conventional in the art.
Example 1
A sand pond fattening breeding method for sea-caught wild swimming crabs comprises the following steps:
(1) preparing a temporary culture pond: the temporary culture pond 1 is 10 m wide and 20m long, an aerator 3, preferably a diaphragm aerator, is arranged in the temporary culture pond, the number of the aerators is 6/mu, the aerators are connected with an air compression pump 4 through an air duct, a gravel layer is arranged at the bottom of the temporary culture pond, the thickness of the gravel layer is 15 cm, and the particle size of the gravel is 0.6 cm. In order to inhibit the water quality deterioration, a circulating water pipeline 5 comprising a water filter 51 and a water pump 52 is arranged, a temporary culture pond, the water filter and the water pump are arranged in the circulating water pipeline in series, an ultraviolet lamp is arranged on the inner side wall of the water filter, a water purification pond 2 for containing seawater is arranged on the side edge of the temporary culture pond, a biological flocculant NOC-1 is added into the seawater of the water purification pond, a filter screen is arranged at the water outlet of the water purification pond, bleaching powder solution with the mass concentration of 1% is sprayed into the temporary culture pond for disinfection, and then the temporary culture pond is solarized for 3;
(2) sand paving and water injection: injecting seawater into the sterilized temporary culture pond, maintaining the water depth in the temporary culture pond 40 cm higher than the gravel layer, introducing dispersed air into the temporary culture pond via aerators, and aerating every 2 hours for 1 hour, wherein the aeration rate of each aerator is 0.8 m3The seawater in the temporary culture pond circularly flows through a circulating water pipeline at a volume flow of 3%/h, and potassium permanganate disinfectant with the mass concentration of 0.3% is added into the seawater flowing through the water filter, wherein the addition amount is 0.5 g/m3。
(3) Selecting and transporting wild crabs: selecting healthy wild swimming crabs captured from crab cages in the sea area in 9-10 months, selecting female crabs which have the average weight of 200 g/crab and complete molting and mating, binding the chela of the female crabs with rubber bands, and transporting the crabs at normal temperature by a running water ship or a running water truck;
(4) putting wild crabs: removing the disabled limbs and the injured individuals, and removing the rubber band according to the ratio of 30 per meter2The female crabs are put into a temporary rearing pond for temporary rearing at the rearing density;
(5) feeding the feed: feeding the small trash fish baits which are kept fresh by a refrigerator twice every day according to the weight of 4% of the weight of the wild crabs in the temporary rearing pond, wherein the feeding time is 7-8 am and 6-7 pm respectively. Draining the seawater in the temporary rearing pond twice every day, wherein the draining time is 6-7 points in the morning and 5-6 points in the evening respectively, picking up residual baits, dead crabs and injured crabs in the temporary rearing pond after draining, then supplementing the residual baits, dead crabs and injured crabs with the seawater in a water purification pond, and keeping the water depth of the temporary rearing pond to be 40 cm.
Example 2
A sand pond fattening breeding method for sea-caught wild swimming crabs comprises the following steps:
(1) preparing a temporary culture pond: the temporary culture pond 1 is 15 m wide and 30 m long, an aerator 3, preferably a diaphragm aerator, is arranged in the temporary culture pond, the number of the aerators is 8/mu, the aerators are connected with an air compression pump 4 through an air duct, a gravel layer is arranged at the bottom of the temporary culture pond, the thickness of the gravel layer is 20 cm, and the particle size of the gravel is 0.8 cm. In order to inhibit the water quality deterioration, a circulating water pipeline 5 comprising a water filter 51 and a water pump 52 is arranged, a temporary culture pond, the water filter and the water pump are connected in series in the circulating water pipeline, an ultraviolet lamp is arranged on the inner side wall of the water filter, a water purification pond 2 for containing seawater is arranged on the side edge of the temporary culture pond, a biological flocculant NOC-1 is added into the seawater of the water purification pond, a filter screen is arranged at the water outlet of the water purification pond, bleaching powder solution with the mass concentration of 2.5% is sprayed to the temporary culture pond for disinfection, and then the temporary culture pond is subjected to sola;
(2) sand paving and water injection: injecting seawater into the sterilized temporary culture pond, maintaining the water depth in the temporary culture pond to be 45cm higher than the gravel layer, introducing dispersed air into the temporary culture pond through an aerator, aerating for 1 hour every 2 hours by the aerator, wherein the aeration rate of each aerator is 1.2 m3The seawater in the temporary culture pond circularly flows through a circulating water pipeline at a volume flow of 5.5%/h, and potassium permanganate disinfectant with the mass concentration of 0.4% is added into the seawater flowing through the water filter, wherein the addition amount is 0.5 g/m3。
(3) Selecting and transporting wild crabs: selecting healthy wild portunids captured from the crab cages in the sea area in 9-10 months, selecting female crabs which have the average weight of 250 g/crab and complete molting and mating, binding the chela feet of the female crabs by rubber bands, and transporting the crabs by a running water ship or a running water truck at normal temperature;
(4) putting wild crabs: removing the disabled and injured individuals and removing the rubber band according to the ratio of 25 per meter2The female crabs are put into a temporary rearing pond for temporary rearing at the rearing density;
(5) feeding the feed: feeding the small trash fish baits which are kept fresh by a refrigerator twice every day according to the weight of 7% of the weight of the wild crabs in the temporary rearing pond, wherein the feeding time is 7-8 am and 6-7 pm respectively. Draining the seawater in the temporary rearing pond twice every day, wherein the draining time is 6-7 points in the morning and 5-6 points in the evening respectively, picking up residual baits, dead crabs and injured crabs in the temporary rearing pond after draining, then supplementing the residual baits, dead crabs and injured crabs with the seawater in a water purification pond, and keeping the water depth of the temporary rearing pond to be 45 cm.
Example 3
A sand pond fattening breeding method for sea-caught wild swimming crabs comprises the following steps:
(1) preparing a temporary culture pond: the temporary culture pond 1 is 20m wide and 40m long, an aerator 3, preferably a diaphragm aerator, is arranged in the temporary culture pond, the number of the aerators is 10/mu, the aerators are connected with an air compression pump 4 through an air duct, a gravel layer is arranged at the bottom of the temporary culture pond, the thickness of the gravel layer is 25cm, and the particle size of the gravel is 1.2 cm. In order to inhibit the water quality deterioration, a circulating water pipeline 5 comprising a water filter 51 and a water pump 52 is arranged, the water filter and the water pump which are left in the temporary culture pond are arranged in the circulating water pipeline in series, an ultraviolet lamp is arranged on the inner side wall of the water filter, a purified water pond for containing seawater is arranged on the side edge of the temporary culture pond, a biological flocculant NOC-1 is added into the seawater of the purified water pond, a filter screen is arranged at the water outlet of the purified water pond, bleaching powder solution with the mass concentration of 4% is sprayed into the temporary culture pond for disinfection, and then the temporary culture pond is;
(2) sand paving and water injection: injecting seawater into the sterilized temporary culture pond, maintaining the water depth in the temporary culture pond to be 50cm higher than the gravel layer, introducing dispersed air into the temporary culture pond through an aerator, aerating for 1 hour every 2 hours by the aerator, wherein the aeration rate of each aerator is 1.5m3The seawater in the temporary culture pond circularly flows through a circulating water pipeline at a volume flow of 8%/h, and potassium permanganate disinfectant with the mass concentration of 0.5% is added into the seawater flowing through the water filter, wherein the addition amount is 0.5 g/m3。
(3) Selecting and transporting wild crabs: selecting healthy wild portunids captured from crab cages in the sea area in 9-10 months, selecting female crabs which have the average weight of 300 g/crab and complete molting and mating, binding the chela feet of the female crabs by rubber bands, and transporting the crabs by a running water ship or a running water truck at normal temperature;
(4) putting wild crabs: removing the disabled limbs and the injured individuals, and removing the rubber band according to the ratio of 20 per meter2The female crabs are put into a temporary rearing pond for temporary rearing at the rearing density;
(5) feeding the feed: feeding the small trash fish baits which are kept fresh by a refrigerator twice every day according to the weight which is 10 percent of the weight of the wild crabs in the temporary rearing pond, wherein the feeding time is 7-8 am and 6-7 pm respectively. Draining the seawater in the temporary rearing pond twice every day, wherein the draining time is 6-7 points in the morning and 5-6 points in the evening respectively, picking up residual baits, dead crabs and injured crabs in the temporary rearing pond after draining, then supplementing the residual baits, dead crabs and injured crabs with the seawater in a water purification pond, and keeping the water depth of the temporary rearing pond to be 50 cm.
The survival rate of the temporarily-bred and fattened wild swimming crabs is 90-92%, the average body weight is 450-550 g/wild swimming crabs, the market price of the wild swimming crabs is improved from 10 yuan/kg in the original 9-10 months to 150-200 yuan/kg in the period from breeding to spring, and the economic benefit is remarkably improved.
Claims (5)
1. A sand pond fattening breeding method for sea-caught wild swimming crabs comprises the following steps:
(1) preparing a temporary culture pond: the temporary culture pond (1) is 10-20 m wide and 20-40 m long, a plurality of aerators (3) are arranged in the pond, the aerators are connected with an air compression pump (4) through an air duct, a gravel layer is arranged at the bottom of the temporary culture pond, the thickness of the gravel layer is 15-25 cm, the particle size of the gravel is 0.6-1.2 cm, a water purification pond (2) for containing seawater is arranged on the side of the temporary culture pond, bleaching powder solution with the mass concentration of 1-4% is sprayed into the temporary culture pond for disinfection, and then the temporary culture pond is exposed for 3-5 days;
(2) sand paving and water injection: injecting seawater in the clean water tank into the sterilized temporary culture tank, keeping the water depth in the temporary culture tank to be 40-50 cm higher than the gravel layer, and introducing dispersed air into the temporary culture tank through an aerator;
(3) selecting and transporting wild crabs: selecting healthy wild portunids captured from the crab pot in the sea area in 9-10 months, selecting female crabs which have the weight of at least 200 g/crab and complete exuviation and mating, binding the chela feet of the female crabs by rubber bands, and transporting the female crabs at normal temperature by using a running water ship or a running water vehicle;
(4) putting wild crabs: removing the disabled limbs and the injured individuals and removing the rubber bands according to the ratio of 20-30 per m2The female crabs are put into a temporary rearing pond for temporary rearing at the rearing density;
(5) feeding the feed: feeding the small trash fish baits which are kept fresh by a refrigerator twice every day, wherein the feeding time is 7-8 am and 6-7 pm respectively according to the weight of 4-10% of the weight of the wild crabs in the temporary rearing pond;
the aerator aerates for 1 hour every 2 hours, and the aeration rate is 0.8-1.5 m3/h；
The step (1) further comprises a circulating water pipeline (5), a water filter (51) is arranged in the circulating water pipeline, the temporary culture pond and the water filter are connected in series in the circulating water pipeline, and seawater in the temporary culture pond flows in a circulating mode through the circulating water pipeline at the volume flow rate of 3-8%/h.
2. The sand pond fattening breeding method for the sea-caught wild swimming crabs according to claim 1, wherein the number of the aerators is 6-10 per mu.
3. The sea catching wild swimming crab sand pond fattening breeding method according to claim 1, characterized in that a potassium permanganate disinfectant with a mass concentration of 0.3-0.5% is added into a water filter, and an ultraviolet lamp is arranged on the inner side wall of the water filter.
4. The sea catching wild swimming crab sand pool fattening breeding method as claimed in claim 1, is characterized in that a bioflocculant NOC-1 is added into seawater of the clean water pool, and a filter screen is arranged at a water outlet of the clean water pool.
5. The sand pond fattening breeding method for the sea caught wild swimming crabs according to claim 1, characterized in that seawater in the temporary breeding pond is drained twice every day, the draining time is 6-7 am and 5-6 pm respectively, residual baits, dead crabs and injured crabs in the temporary breeding pond are picked up after draining, and then the seawater in the water purification pond is used for supplementing.
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| CN108094282B (en) * | 2017-12-15 | 2020-01-14 | 浙江海洋大学 | Method for cultivating high-quality oogenesis crabs of portunus trituberculatus, morphological screening method and formula feed thereof |
| CN108477037A (en) * | 2018-03-14 | 2018-09-04 | 和县明信水产养殖专业合作社 | It is a kind of drawing river and enter the river crab in pond temporarily support fattening method |
| CN108887210A (en) * | 2018-08-24 | 2018-11-27 | 浙江海洋大学 | A kind of closed fishing season sea catch swimming crab efficiently temporarily feeding method |
| CN110338113B (en) * | 2019-08-16 | 2022-08-19 | 浙江省海洋水产研究所 | Out-of-season swimming crab seedling raising method |
| CN112273300A (en) * | 2020-11-02 | 2021-01-29 | 宁德市鼎诚水产有限公司 | Method for improving survival rate of wild blue crabs |
| CN114982683A (en) * | 2022-06-17 | 2022-09-02 | 浙江省海洋水产研究所 | Breeding method for improving egg laying times and total egg production of portunids |
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