CN111034657A - Method for marking rough micropterus salmoides fries by using circulating water culture tank in pond - Google Patents
Method for marking rough micropterus salmoides fries by using circulating water culture tank in pond Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 241001125889 Micropterus salmoides Species 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009395 breeding Methods 0.000 claims description 21
- 230000001488 breeding effect Effects 0.000 claims description 21
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 19
- 229910052760 oxygen Inorganic materials 0.000 claims description 19
- 239000001301 oxygen Substances 0.000 claims description 19
- 241000251468 Actinopterygii Species 0.000 claims description 18
- 238000006213 oxygenation reaction Methods 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 11
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 claims description 10
- 229930003268 Vitamin C Natural products 0.000 claims description 10
- 239000010865 sewage Substances 0.000 claims description 10
- 235000019154 vitamin C Nutrition 0.000 claims description 10
- 239000011718 vitamin C Substances 0.000 claims description 10
- 230000037406 food intake Effects 0.000 claims description 8
- 235000004347 Perilla Nutrition 0.000 claims description 5
- 210000001325 yolk sac Anatomy 0.000 claims description 5
- 235000015170 shellfish Nutrition 0.000 claims description 4
- 230000003203 everyday effect Effects 0.000 claims description 3
- 244000124853 Perilla frutescens Species 0.000 claims 1
- 230000004083 survival effect Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008719 thickening Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009360 aquaculture Methods 0.000 description 8
- 244000144974 aquaculture Species 0.000 description 8
- 235000013305 food Nutrition 0.000 description 5
- 241000229722 Perilla <angiosperm> Species 0.000 description 4
- 241000195493 Cryptophyta Species 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000192710 Microcystis aeruginosa Species 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000701372 Iridovirus Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 239000003814 drug Substances 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
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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
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/174—Vitamins
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
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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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- 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
- Y02A40/818—Alternative feeds for fish, e.g. in aquacultures
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Abstract
The invention discloses a method for marking rough largemouth black bass fries by utilizing a circulating water culture tank in a pond. The invention innovatively provides a method for thickening largemouth bass fry by utilizing a circulating water culture tank in a pond, and the method improves the survival rate of largemouth bass fry thickening to more than 60 percent by means of optimizing stocking density, constructing proper initial feed, optimizing a water quality regulation and control technology and the like, and can obviously improve the economic benefit of largemouth bass culture.
Description
Technical Field
The invention relates to the technical field of aquaculture,
in particular to a method for marking rough micropterus salmoides fries by utilizing a circulating water culture tank in a pond.
Background
The largemouth black bass is originally produced in the United states and introduced into China in 1983, and the culture yield is up to now over 35000 tons. Mainly cultivated in the areas of the pearl triangle and the Long triangle in China. In 2019, the largemouth black bass water bloom seedlings bred only in Zhejiang lake have 20 hundred million tails, at present, the largemouth black bass water bloom seedlings are mostly cultured in a soil pond, the problems of difficult feeding conversion, low domestication survival rate and the like exist, the success rate of domesticating the largemouth black bass in a general pond is only 30% -35% according to statistics, in addition, the influence of iridovirus and rhabdovirus in recent years, and the survival rate of the largemouth black bass seedlings in the soil pond of the Trapa lake region in Zhejiang lake in 2019 is less than 10%.
Circulating water aquaculture (IPA) in the Pond is a novel composite aquaculture system combining a high-density circulating water aquaculture water tank and a Pond ecological rough culture area through engineering transformation on an aquaculture Pond. The system is used for intensive culture of fish in a running water type water tank and collecting and treating solid wastes such as residual baits, excrement and the like generated in an intensive culture area. Compared with the traditional pond culture mode, the system has the following advantages: (1) the water resource pollution is small, the utilization efficiency is high, part of residual bait and excrement are transferred out of the water body in the culture process, the content of substances such as nitrogen, phosphorus and the like in the culture water body is reduced, water does not need to be changed in the whole culture period, and the aquaculture pollution is reduced; (2) the land is saved and the efficiency is high, and the fish yield of the unit water body of the culture unit can reach 50-70kg/m3(ii) a (3) The aquaculture water has good water quality and high dissolved oxygen content, can reduce the occurrence probability of diseases and the use of medicaments, and improves the quality and the safety of aquatic products; (4) the operation is convenient, and the whole operation and the fishing are only carried out in the water tank. The clean production concept is in accordance with the requirement of water ecological environment protection, so that the method is generally applied in various places of China in recent years, and is one of important means for transformation and upgrading of fishery in Jiangzhe and Zhejiang.
Because the largemouth bass fry with thick soil pond can generate stress reaction 2-3 days after entering the IPA culture tank, death with different degrees is caused, if the largemouth bass fry is thickened by adopting circulating water culture in the pond and then continuously cultured by the IPA culture tank, the problem of low survival rate caused by stress reaction generated after the largemouth bass fry enters the IPA culture tank can be avoided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for marking rough largemouth black bass fries by utilizing a circulating water culture tank in a pond.
In order to solve the problems, the invention adopts the following technical scheme:
a method for marking rough micropterus salmoides fries by using a circulating water culture tank in a pond comprises the following steps:
(1) building an internal circulating water culture tank: the area of the culture tank accounts for 5-8% of the total area of the culture pond, and a water pushing oxygenation device and a bottom oxygenation device are arranged in the culture tank;
(2) stocking density: the stocking density of largemouth bass fries in the breeding tank is 3600-4500 fries/m 3;
(3) adding a fish blocking net: adding fish blocking nets at the water inlet end and the water outlet end of the culture tank, adopting a dense-meshed net cloth of 40-60 meshes at the initial culture stage, and timely replacing the size of the dense-meshed net cloth according to the size of the seedlings;
(4) feeding baits: feeding is not needed 1-2 days before stocking; feeding living or frozen zooplankton as open-feed for 6-8 times a day, wherein the feeding amount accounts for 5-6% of the weight of the offspring seeds, and feeding the zooplankton mixed with vitamin C for 3-4 days every 7 days; when the seedlings reach more than 3cm, domesticating by adopting a mode of gradually increasing the compound feed until the compound feed is completely used; then feeding the compound feed mixed with the vitamin C and the perilla extract every 7 days for 5-7 days, wherein the feeding is carried out for 5-6 times every day, and the feeding amount accounts for 5-6% of the weight of the seedlings;
(5) water quality regulation and control: controlling the water temperature in the culture tank to be 20-25 ℃, the pH value to be 7-8.5, the salinity to be less than 10 per mill and the dissolved oxygen to be more than 3 mg/L.
Preferably, the water quality regulation and control further comprises a sewage treatment pool constructed beside the culture tank, the area of the sewage treatment pool accounts for 10-20% of the total area of the internal circulating water culture tank, and filter-feeding fishes or shellfish algae are cultured in the sewage treatment pool.
Preferably, on the 1 st day of stocking, opening the bottom oxygenation device of the breeding tank; after the yolk sacs of the largemouth bass fries are digested and absorbed, opening the bottom oxygenation device of the culture tank and externally connecting a water pump at the same time to form micro-flowing water on one side of the culture tank and gradually induce the fries to be intensively ingested; and when the compound feed to be ingested reaches more than 50% of the total ingestion amount, opening the water pushing and oxygen increasing device for 15min 30min after each ingestion to remove residual bait and excrement in the culture tank.
Preferably, when the seedlings reach 5-6 cm, the seedlings in the culture tank are put in separate tanks for stocking so as to prevent the seedlings from being too dense.
Preferably, the culture groove is cuboid, the length is 22m, the width is 5m, the depth is 2.5m, and the water depth in the culture groove is 2 m.
Preferably, the compound feed is a buoyant expanded feed.
Compared with the prior art, the invention has the technical effects that:
the invention innovatively provides a method for thickening largemouth bass fry by utilizing a circulating water culture tank in a pond, and the method improves the survival rate of largemouth bass fry thickening to more than 60 percent by means of optimizing stocking density, constructing proper initial feed, optimizing a water quality regulation and control technology and the like, and can obviously improve the economic benefit of largemouth bass culture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a method for marking rough micropterus salmoides fries by using a circulating water culture tank in a pond, which comprises the following steps:
(1) building an internal circulating water culture water tank: the area of the culture tank accounts for 5-8% of the total area of the culture pond, and a water pushing oxygenation device and a bottom oxygenation device are arranged in the culture tank;
(2) stocking density: the stocking density of largemouth bass fries in the breeding tank is 3600-4500 fries/m3；
(3) Adding a fish blocking net: adding fish blocking nets at the water inlet end and the water outlet end of the culture tank, adopting a dense-meshed net cloth of 40-60 meshes at the initial culture stage, and timely replacing the size of the dense-meshed net cloth according to the size of the seedlings;
(4) feeding baits: feeding is not needed 1-2 days before stocking; feeding living or frozen zooplankton as open-feed for 6-8 times a day, wherein the feeding amount accounts for 5-6% of the weight of the offspring seeds, and feeding the zooplankton mixed with vitamin C for 3-4 days every 7 days; when the seedlings reach more than 3cm, domesticating by adopting a mode of gradually increasing the compound feed until the compound feed is completely used; then feeding the compound feed mixed with the vitamin C and the perilla extract every 7 days for 5-7 days, wherein the feeding is carried out for 5-6 times every day, and the feeding amount accounts for 5-6% of the weight of the seedlings;
(5) water quality regulation and control: controlling the water temperature in the culture tank to be 20-25 ℃, controlling the pH value to be 7-8.5, and controlling the dissolved oxygen to be more than 5 mg/L.
Wherein, the culture groove in the step (1) is cuboid, the length is 22m, the width is 5m, the depth is 2.5m, and the water depth in the culture groove is 2 m. The breeding grooves can be formed in a plurality of numbers according to breeding scale, the area of the breeding grooves accounts for 5-8% of the total area of the breeding pond, the area of the breeding grooves is not too high, residual baits and seedling excrement generated in the breeding grooves cannot be cleaned in time due to too high area, water quality deterioration is caused, and seedling growth is influenced. And (4) the feeding amount in each feeding in the step (4) is based on that the seedlings are not fed any more after 5min of food input.
The stocking density is a key factor influencing the survival rate of the fries, and long-term practice shows that the stocking density of the largemouth bass fries is 3600-4500 fries/m3In the meantime, the seedlings have high survival rate.
In order to effectively avoid foreign enemy organisms from ingesting largemouth bass fries and simultaneously prevent the fries from escaping from the inside and the outside of the culture tank, fish blocking nets are additionally arranged at the water inlet end and the water outlet end of the culture tank respectively. In the initial stocking period, the seedlings are small, and a 40-60-mesh dense-mesh net cloth can be selected; when the largemouth bass fry grows to be more than 3cm, the dense cloth of larger meshes can be replaced, such as 10-20 meshes. The barrier net can be a cotton net or a polyethylene net.
Because the pollution of aquaculture belongs to benign pollution, residual baits and fish excrement can be absorbed and utilized by other organisms, a sewage treatment pool can be built on the bank near the culture tank, the area of the sewage treatment pool accounts for 10-20% of the total area of the internal circulating water culture water tank, and filter-feeding fishes or shellfish algae are raised in the sewage treatment pool. The filter feeding fishes or shellfish algae are used for converting organic substances in the sewage into natural baits for reutilization, thereby meeting the requirements of ecological culture.
Preferably, on the 1 st day of stocking, opening a bottom oxygen increasing device of the breeding tank to provide oxygen for the seedlings; after the yolk sacs of the largemouth bass are digested and absorbed, opening a bottom oxygenation device of the culture tank and externally connecting a water pump at the same time to form micro-flowing water on one side of the culture tank and gradually induce the fry to be intensively ingested; when the compound feed to be ingested reaches more than 50% of the total amount of the feed to be ingested, the water pushing and oxygen increasing device is opened for 15min 30min after the end of each ingestion to remove residual feed and excrement in the culture tank.
Preferably, when the seedlings reach 5-6 cm, the seedlings in the cultivation grooves are put in different grooves for cultivation, so that the low survival rate of the seedlings caused by the fact that the seedlings are lack of oxygen or snatch or are killed mutually for competing for living space is prevented.
Preferably, the compound feed is a buoyant expanded feed. The expanded feed is convenient for observing the ingestion condition of the seedlings, and the feeding amount is adjusted in time; and the expanded feed is beneficial to reducing the disease rate of seedlings, improving the utilization rate of the feed and improving the culture water quality.
In the largemouth black bass fry coarsening process, the main factors influencing the survival rate of the largemouth black bass fries are stocking density, feed composition and water quality condition, and the method improves the survival rate of the largemouth black bass fries to more than 60 percent by means of optimizing the stocking density, constructing proper initial feed, optimizing water quality regulation and control technology and the like, and can obviously improve the economic benefit of largemouth black bass breeding.
The following is a further description with reference to specific examples.
Example 1
The embodiment 1 of the invention provides a method for marking rough micropterus salmoides fries by using a circulating water culture tank in a pond, which comprises the following steps:
(1) building an internal circulating water culture tank: building 4 culture tanks, wherein the size of each culture tank is 22m multiplied by 5m multiplied by 2.5m, the depth of water in each culture tank is 2m, the area of each culture tank accounts for 8% of the total area of the culture pond, and each culture tank is internally provided with 3 water pushing oxygenation devices and 3 bottom oxygenation devices;
(2) stocking density: health preservingThe stocking density of largemouth bass fries in the breeding tank is 4000 per m3；
(3) Adding a fish blocking net: polyethylene fish blocking nets are additionally arranged at the water inlet end and the water outlet end of the culture tank, a 40-mesh dense-mesh net cloth is adopted at the initial stage of culture, and a 20-mesh dense-mesh net cloth is replaced when largemouth black bass fries grow to be more than 3 cm;
(4) feeding baits: feeding is not carried out 2 days before stocking; then, feeding living bodies or frozen zooplankton as open-end feed for 8 times a day, wherein the feeding amount accounts for 5% of the weight of the offspring seeds, and feeding the zooplankton mixed with vitamin C for 3 days every 7 days; when the seedlings reach more than 3cm, domesticating in a mode of gradually increasing the floating expanded feed until the floating expanded feed is completely used; then feeding the floating expanded feed mixed with vitamin C and perilla extract every 7 days for 5 days, and feeding for 5 times a day, wherein the feeding amount accounts for 5% of the weight of the seedlings;
(5) water quality regulation and control: controlling the water temperature in the culture tank to be 22-25 ℃, the pH to be 7-8.5, and the dissolved oxygen to be more than 5 mg/L. On the 1 st day of stocking, opening a bottom oxygen increasing device of the breeding tank to provide oxygen for the seedlings; after the yolk sacs of the largemouth bass are digested and absorbed, opening a bottom oxygenation device of the culture tank and externally connecting a water pump at the same time to form micro-flowing water on one side of the culture tank and gradually induce the fry to be intensively ingested; and when 50% of the total amount of the food to be ingested is reached by the floating expanded feed, opening the water pushing and oxygen increasing device for 15min 30min after the end of each food ingestion to remove residual feed and excrement in the culture tank.
After 50 days of standard coarse breeding, the seedlings are intensively caught and counted, and the survival rate of the seedlings is 65.8 percent.
Example 2
The embodiment 2 of the invention provides a method for marking rough micropterus salmoides fries by utilizing a circulating water culture tank in a pond, which comprises the following steps:
(1) building an internal circulating water culture tank: 2 culture tanks are built, the size of each culture tank is 22m multiplied by 5m multiplied by 2.5m, the water depth in each culture tank is 2m, the area of each culture tank accounts for 5 percent of the total area of the culture pond, and each culture tank is internally provided with 3 water pushing oxygenation devices and 3 bottom oxygenation devices;
(2) stocking density: the stocking density of largemouth bass fries in the breeding tank is 3600 fries/m3；
(3) Adding a fish blocking net: polyethylene fish blocking nets are additionally arranged at the water inlet end and the water outlet end of the culture tank, a 40-mesh dense-mesh net cloth is adopted at the initial stage of culture, and a 20-mesh dense-mesh net cloth is replaced when largemouth black bass fries grow to be more than 3 cm;
(4) feeding baits: feeding is not carried out 2 days before stocking; then, feeding living bodies or frozen zooplankton as open-end feed for 6 times a day, wherein the feeding amount accounts for 6% of the weight of the offspring seeds, and feeding the zooplankton mixed with vitamin C for 3 days every 7 days; when the seedlings reach more than 3cm, domesticating in a mode of gradually increasing the floating expanded feed until the floating expanded feed is completely used; then feeding the floating expanded feed mixed with vitamin C and perilla extract every 7 days for 5 days, feeding for 6 times a day, wherein the feeding amount accounts for 6% of the weight of the seedlings;
(5) water quality regulation and control: controlling the water temperature in the culture tank to be 22-25 ℃, the pH to be 7-8.5, and the dissolved oxygen to be more than 5 mg/L. On the 1 st day of stocking, opening a bottom oxygen increasing device of the breeding tank to provide oxygen for the seedlings; after the yolk sacs of the largemouth bass are digested and absorbed, opening a bottom oxygenation device of the culture tank and externally connecting a water pump at the same time to form micro-flowing water on one side of the culture tank and gradually induce the fry to be intensively ingested; and when 50% of the total amount of the food to be ingested is reached by the floating expanded feed, opening the water pushing and oxygen increasing device for 15min 30min after the end of each food ingestion to remove residual feed and excrement in the culture tank.
After 50 days of standard coarse breeding, the seedlings are intensively caught and counted, and the survival rate of the seedlings is 72.4 percent.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for marking rough micropterus salmoides fries by using a circulating water culture tank in a pond is characterized by comprising the following steps:
(1) building an internal circulating water culture tank: the area of the culture tank accounts for 5-8% of the total area of the culture pond, and a water pushing oxygenation device and a bottom oxygenation device are arranged in the culture tank;
(2) stocking density: the stocking density of largemouth bass fries in the breeding tank is 3600-4500 fries/m3；
(3) Adding a fish blocking net: adding fish blocking nets at the water inlet end and the water outlet end of the culture tank, adopting a dense-meshed net cloth of 40-60 meshes at the initial culture stage, and timely replacing the size of the dense-meshed net cloth according to the size of the seedlings;
(4) feeding baits: feeding is not needed 1-2 days before stocking; feeding living or frozen zooplankton as open-feed for 6-8 times a day, wherein the feeding amount accounts for 5-6% of the weight of the offspring seeds, and feeding the zooplankton mixed with vitamin C for 3-4 days every 7 days; when the seedlings reach more than 3cm, domesticating by adopting a mode of gradually increasing the compound feed until the compound feed is completely used; then feeding the compound feed mixed with the vitamin C and the perilla extract every 7 days for 5-7 days, wherein the feeding is carried out for 5-6 times every day, and the feeding amount accounts for 5-6% of the weight of the seedlings;
(5) water quality regulation and control: controlling the water temperature in the culture tank to be 20-25 ℃, the pH value to be 7-8.5, the salinity to be less than 10 per mill and the dissolved oxygen to be more than 3 mg/L.
2. The method for breeding rough largemouth black bass fries by using the circulating water in the pond as claimed in claim 1, wherein the water quality regulation and control further comprises the step of constructing a sewage treatment pond beside the breeding tank, wherein the area of the sewage treatment pond accounts for 10-20% of the total area of the internal circulating water breeding tank, and filter-feeding fishes or shellfishes are bred in the sewage treatment pond.
3. The method for marking largemouth bass fry by using the circulating water culture tank in the pond as claimed in claim 1, wherein the bottom oxygen increasing device of the culture tank is opened on the 1 st day of stocking; after the yolk sacs of the largemouth bass fries are digested and absorbed, opening the bottom oxygenation device of the culture tank and externally connecting a water pump at the same time to form micro-flowing water on one side of the culture tank and gradually induce the fries to be intensively ingested; and when the compound feed to be ingested reaches more than 50% of the total ingestion amount, opening the water pushing and oxygen increasing device for 15min 30min after each ingestion to remove residual bait and excrement in the culture tank.
4. The method for marking rough largemouth black bass fries by using the circulating water culture tank in the pond as claimed in claim 1, wherein when the fries reach 5-6 cm, the fries in the culture tank are separately put in the tank to prevent the fries from being too dense.
5. The method for marking rough largemouth black bass fries by utilizing the circulating water culture tank in the pond as claimed in claim 1, wherein the culture tank is cuboid, 22m in length, 5m in width and 2.5m in depth, and the water in the culture tank is 2m in depth.
6. The method for scaling rough micropterus salmoides fries by using the circulating water culture tank in the pond as claimed in claim 1, wherein the compound feed is buoyancy expanded feed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911260035.8A CN111034657A (en) | 2019-12-10 | 2019-12-10 | Method for marking rough micropterus salmoides fries by using circulating water culture tank in pond |
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| CN112119950A (en) * | 2020-09-30 | 2020-12-25 | 天津市水产研究所 | Method for food transfer domestication of larval black bass |
| CN114698582A (en) * | 2022-05-20 | 2022-07-05 | 浙江省淡水水产研究所 | Automatic feeding machine for micropterus salmoides fries and using method |
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