CN115152672A - Method for in-situ serial breeding of crabs, shrimps and shellfish in same pond - Google Patents
Method for in-situ serial breeding of crabs, shrimps and shellfish in same pond 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
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
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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
- A01K61/50—Culture of aquatic animals of shellfish
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- A—HUMAN NECESSITIES
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- 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
- A01K63/003—Aquaria; Terraria
- A01K63/006—Accessories for aquaria or terraria
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- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/047—Liquid pumps for aquaria
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- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
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- A23K10/22—Animal feeding-stuffs from material of animal origin from fish
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Abstract
The invention relates to the technical field of aquaculture, and discloses a method for in-situ serial culture of crabs, shrimps and shellfish in the same pond, which comprises the following steps: (a) arranging a culture pond: the culture pond comprises a crab culture area, a shrimp culture area and a shellfish culture area which are mutually independent; (b) culturing: putting aquatic products in corresponding areas; water is changed every day in the culture process, and water flows along the direction of a crab culture area, a shrimp culture area and a shellfish culture area in the water change process; feeding baits in the crab culture area and the shrimp culture area every day; and (c) catching. The original pond is divided into crab, shrimp and shellfish culture functional areas, the culture spaces of the crabs, the shrimps and the shellfish are relatively independent, and a crab-shrimp-shellfish in-pond ex-situ series culture method is established, so that the water quality regulation and control capability and the nutrient substance utilization efficiency are improved, the crab clear water culture and the shrimp and shellfish rich water culture are realized, the yield of three kinds of aquatic products is improved, the economic benefit is good, the culture tail water is reduced and discharged up to the standard, and the requirement of green and efficient culture is met.
Description
Technical Field
The invention relates to the technical field of aquaculture, in particular to a method for in-situ serial culture of crabs, shrimps and shellfish in the same pond.
Background
The crab-shrimp-shellfish mixed culture is one of the main modes of seawater pond culture, in particular to the mixed culture of penaeus japonicus (south America white shrimps and exopalaemon carinicauda) and Sinonovacula constricta (or arca subcrenata) in a main swimming crab culture pond, which becomes the most representative dominant mode of seawater pond culture in Zhejiang and Jiangsu, and the crab-shrimp-shellfish three-dimensional comprehensive mixed culture mode is characterized in that the swimming crabs are cultured in a water body, the crabs are cultured in the pond bottom, and the shellfish is cultured in bottom mud, and the swimming crabs are mainly fed in the whole culture process, the shrimps eat residual bait, and algae and organic debris in shellfish filter-feeding water. The mode makes full use of the principle of mixed culture biology, and the comprehensive culture benefit is maximized by breeding species with different feeding habits, different feeding modes and different habitation habits in the same water body.
However, through years of development, the crab-shrimp-shellfish co-pond polyculture mode also has some problems. For example, the mixed culture of 3 varieties of swimming crabs, exopalaemon carinicauda and sinonovacula constricta has the following problems: (1) The swimming crabs, the palaemon carinicauda and the sinonovacula constricta have different preference on water quality, the swimming crabs like clear water, the sinonovacula constricta like rich water because the sinonovacula constricta mainly ingests algae in water, and the palaemon carinicauda is between the swimming crabs and the sinonovacula constricta, so that when the swimming crabs, the palaemon carinicauda and the sinonovacula constricta coexist, the two are difficult to be considered in water quality regulation and control, and the high yield of the swimming crabs, the palaemon carinicauda and the sinonovacula constricta is difficult to realize; (2) Nutrient substances in the water body are not fully utilized, so that resource waste is caused; (3) Some water quality indexes such as total nitrogen and total phosphorus, COD and the like in the culture tail water do not reach the standard, and the culture tail water needs to be reprocessed before being discharged, so the cost is higher. Chinese patent publication No. CN102524155A discloses a beach shellfish and shrimp and crab mixed culture seawater pond surrounding system, wherein the whole seawater pond is divided into a shellfish culture area and a shrimp and crab culture area by a nylon net, and an aerator is arranged at one side of the shrimp and crab culture area close to the shellfish culture area, so that bait microalgae in a water body can be prevented from being completely consumed when the biomass of shellfish is large in rainy days, sufficient bait can be ensured to be obtained for the beach shellfish in the whole culture period, and a relatively stable water area ecological environment for shrimp and crab culture is ensured. However, the culture method still cannot fully treat the nutrition in the water body, and the water quality index of the discharged water body cannot meet the requirement.
Disclosure of Invention
The invention aims to overcome the problems of low nutrient utilization rate, poor culture effect and high treatment cost of discharged water in the mixed culture of crabs, shrimps and shellfish in the prior art, and provides a method for the ex-situ series culture of crabs, shrimps and shellfish in the same pond.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for culturing crabs, shrimps and shellfish in series in the same pond in different positions comprises the following steps:
(a) Arranging a culture pond: the cultivation pond is trimmed and then disinfected to meet the cultivation requirement; the aquaculture pond comprises a crab aquaculture area, a shrimp aquaculture area and a shellfish aquaculture area, the crab aquaculture area is provided with a water inlet valve, a first water change gate is arranged between the crab aquaculture area and the shrimp aquaculture area, a second water change gate is arranged between the shellfish aquaculture area and the shrimp aquaculture area, and the bottom of the shellfish aquaculture area is provided with a water outlet pipe with a switch;
(b) Culturing: putting crabs in the crab culture area, putting shrimps in the shrimp culture area, and putting shellfish in the shellfish culture area for aquaculture; water is changed every day in the culture process, and the water changing method comprises the following steps: opening a water outlet pipe to discharge 60-80% of water in the shellfish culture area, closing the water outlet pipe, sequentially opening a second water change valve, a first water change valve and a water inlet valve until the water level in the culture pond meets the requirement, and closing the second water change valve, the first water change valve and the water inlet valve; feeding baits in a crab culture area and a shrimp culture area every day;
(c) Catching: in the middle and last ten days of October, capturing shrimps, stopping bait feeding in the shrimp culture area, and keeping other culture modes unchanged; before and after the spring festival, the crabs and the shellfish are caught.
In the culture process, in order to fully utilize the nutrition in the water body and ensure that the water quality is suitable for different requirements of crabs, shrimps and shellfish, the culture pond is divided into areas, and the flow direction of the water body in the culture pond is controlled by the water inlet valve, the first water change valve, the second water change valve, the third water change valve and the water outlet valve, so that the good control of the water quality and the full utilization of nutrient substances are realized. Before water is changed, the water depths in the three culture areas are the same, and the water bodies do not circulate mutually, so that the water quality in the three culture areas can be controlled in a targeted manner, and different requirements of different kinds of aquaculture can be met. In the water changing process, water flows along the direction of the crab culture area, the shrimp culture area and the shellfish culture area, so that nutrients can be transferred and flowed step by step, and the nutrients in the water body can be fully utilized. Particularly in the shellfish culture areas, as the shellfish cultured in the shellfish culture areas mainly filter algae and organic debris in the water, the water bodies flowing into the first two culture areas can be fully utilized, no extra feed is needed for feeding, and the shellfish culture system has better economic benefit. In addition, the water discharged from the shellfish culture area can be absorbed and purified due to ingestion of shellfish, so that the discharged water does not need to be subjected to subsequent water quality treatment, and the culture process is more environment-friendly. When the crabs are caught, the shrimps are harvested first, and then the crabs and the shellfish are harvested after the crabs and the shellfish are cultured for a period of time, so that the economic benefit is ensured. Stopping feeding the shrimp culture area after the shrimps are caught, and simultaneously continuing to perform other culture steps to meet the growth requirements of the crabs and the shellfish.
Preferably, the crabs are portunids, the shrimps are palaemon carinicauda, and the shellfish are sinonovacula constricta. The swimming crabs, the palaemon carinicauda and the sinonovacula constricta are the most representative aquatic products for seawater pond culture in Zhejiang, jiangsu and the like, and the three aquatic products are cultured in a combined mode through the scheme of the invention, so that the nutrient substances can be absorbed and utilized more fully, and the culture efficiency is higher.
Preferably, in the culture pond, the crab culture area accounts for 50-70% of the total area of the culture pond, the shrimp culture area accounts for 25-35% of the total area of the culture pond, and the shellfish culture area accounts for 5-15% of the total area of the culture pond.
Preferably, the depth of the crab culture area and the shrimp culture area is 1.5 to 1.8m, and the depth of the shellfish culture area is 0.8 to 1m.
Preferably, a first water pump is arranged in the shrimp culture area, and a second water pump is arranged in the shellfish culture area. When the water changing step needs to be completed quickly, the water pump can be used for accelerating the flow of the water body, and the water changing efficiency is improved.
Preferably, the putting time of the crabs is 5 months, the putting type is I-stage swimming crab seedlings, and the putting density is 1-1.5 ten thousand per mu; the feeding time of the shrimps is 5 months earlier, the feeding type is the exopalaemon carinicauda, and the feeding density is 1.5-2.5 kg/mu; the shellfish is put in the pond for 4 months, the type of the shellfish is sinonovacula constricta seedlings, the size of the sinonovacula constricta seedlings is 5000 granules/jin, and the putting density is 35-45 ten thousand granules/mu.
Preferably, in the step (b), the bait fed into the crab culture area is fresh trash fish, and the bait fed into the shrimp culture area is compound feed, wherein the compound feed comprises the following components in parts by weight: 10 to 12 portions of fish meal, 15 to 18 portions of bean pulp, 8 to 10 portions of peanut meal, 5 to 15 portions of wheat, 5 to 8 portions of beer yeast, 5 to 12 portions of strong flour, 1 to 2 portions of calcium dihydrogen phosphate for feed, 2 to 5 portions of fish oil, 1 to 2 portions of vegetable oil, 2 to 5 portions of shrimp shell meal, 1 to 3 portions of wheat gluten, 1 to 3 portions of zeolite powder, 1 to 2 portions of compound mineral substance, 0.5 to 1 portion of compound vitamin and 0.2 to 0.5 portion of choline chloride.
Preferably, in the step (b), the bait feeding amount in the crab culture area is 8-10% of the weight of the crabs, and the bait feeding amount in the shrimp culture area is 3-5% of the weight of the shrimps.
Preferably, in the step (b), water quality management is further performed, and the water quality management method comprises: the chlorine dioxide is used for comprehensively disinfecting 3 culture areas once every ten days, 600 g/mu is used, and the EM bacteria is used once every next day after disinfection, 500 g/mu is used.
Preferably, in the step (b), the shrimp culture area uses the water and fertilizer paste or the algae power once a day, and the dosage is 3 kg/mu; the shrimp culture area is supplemented with diatom dry algae seeds once a week, and the dosage is 0.1 kg/mu. The water quality management of the prawn culture area needs to run through the whole culture process, including the capture of shrimps, so that the shellfish can be ensured to still have enough nutrient substances to be absorbed in the subsequent stage, and the shellfish yield is improved.
Therefore, the invention has the following beneficial effects: (1) The original pond is divided into crab, shrimp and shellfish culture functional areas, the culture spaces of the crabs, the shrimps and the shellfish are relatively independent, the water quality can be controlled in a targeted manner, clear water culture of the crabs and rich water culture of the shrimps and the shellfish are realized, and 3 varieties can realize higher yield and have good economic benefit; (2) Nutrient substances are transferred and flow step by step, so that the utilization rate of the nutrient substances in the water body is high; (3) Tail water after the crabs and shrimps are cultured is absorbed and purified by the shellfish, and can meet the water quality standard in the discharge process without additional treatment; (4) The method for culturing crabs, shrimps and shellfish in an ectopic series mode is established by regulating water with bacteria and algae and purifying water with shellfish, so that the water quality regulation and control capability is improved, the amount of tail water of culture is reduced and the tail water reaches the standard, and the requirement of green and efficient culture is met.
Drawings
FIG. 1 is a schematic view of a structure of a culture pond of the present invention.
In the figure: 1 crab culture zone, 2 shrimp culture zone, 3 shellfish culture zone, 4 water intaking valves, 5 first water change valves, 6 second water change valves, 7 outlet pipes, 8 first water pumps, 9 second water pumps.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings. It is to be understood that these embodiments are suitable for illustrating the basic principles, main features and advantages of the present invention, and the present invention is not limited by the scope of the following embodiments; the implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions used in routine experiments. Not specifically illustrated in the following examples, all starting materials are commercially available or prepared by methods conventional in the art.
Example 1
A method for culturing crabs, shrimps and shellfish in series in the same pond in different positions comprises the following steps:
(a) Arranging a culture pond: the cultivation pond is trimmed and then disinfected to meet the cultivation requirement; as shown in fig. 1, the culture pond comprises a crab culture area 1, a shrimp culture area 2 and a shellfish culture area 3, and the total area of the culture pond is 30 mu, wherein the crab culture area accounts for 60% of the total area of the culture pond, the shrimp culture area accounts for 30% of the total area of the culture pond, and the shellfish culture area accounts for 10% of the total area of the culture pond; the depths of the crab culture area and the shrimp culture area are 1.6m, and the depth of the shellfish culture area is 0.9m; the water inlet valve 4 is arranged in the crab culture area, the first water change gate 5 is arranged between the crab culture area and the shrimp culture area, the second water change gate 6 is arranged between the shellfish culture areas in the shrimp culture area, the water outlet pipe 7 with a switch is arranged at the bottom of the shellfish culture area, the first water pump 8 is arranged in the shrimp culture area, and the second water pump 9 is arranged in the shellfish culture area;
(b) Culturing: putting crabs in the crab culture zone, shrimps in the shrimp culture zone and shellfish in the shellfish culture zone, and carrying out aquaculture, wherein the crabs are portunids, the shrimps are palaemon carinicauda, and the shellfish is sinonovacula constricta; the putting time of the crabs is 5 months earlier, the putting types are I-stage swimming crab seedlings, and the putting density is 1.3 thousands per mu; the feeding time of the shrimps is 5 months, the feeding type of the shrimps is the exopalaemon carinicauda, and the feeding density is 2 kg/mu; the feeding time of the shellfish is 4 months, the feeding type of the shellfish is sinonovacula constricta lamarck seedlings, the sinonovacula constricta lamarck seedlings are 5000 grains/jin, and the feeding density is 40 ten thousand grains/mu;
water is changed every day in the culture process, and the water changing method comprises the following steps: opening a water outlet pipe to discharge 60-80% of water in the shell culture area, then closing the water outlet pipe, sequentially opening a second water exchange valve, a first water exchange valve and a water inlet valve, synchronously opening a first water pump and a second water pump when opening the first water exchange valve and the second water exchange valve until the water level in the culture pond meets the requirement, and then closing the second water exchange valve, the first water exchange valve and the water inlet valve; feeding baits into a crab culture area and a shrimp culture area every day, wherein the baits fed into the crab culture area are fresh trash fish, the bait feeding amount in the crab culture area is 8-10% of the weight of the crabs, the bait fed into the shrimp culture area is compound feed, the bait feeding amount in the shrimp culture area is 3-5% of the weight of the shrimps, and the compound feed comprises the following components in parts by weight: 10 to 12 portions of fish meal, 15 to 18 portions of soybean meal, 8 to 10 portions of peanut meal, 5 to 15 portions of wheat, 5 to 8 portions of beer yeast, 5 to 12 portions of high gluten flour, 1 to 2 portions of calcium dihydrogen phosphate for feed, 2 to 5 portions of fish oil, 1 to 2 portions of vegetable oil, 2 to 5 portions of shrimp shell powder, 1 to 3 portions of vital gluten, 1 to 3 portions of zeolite powder, 1 to 2 portions of compound mineral substance, 0.5 to 1 portion of compound vitamin and 0.2 to 0.5 portion of choline chloride;
the water quality management is carried out in the culture process, and the water quality management method comprises the following steps: the method comprises the following steps of (1) completely disinfecting 3 culture areas once by using chlorine dioxide every ten days, wherein 600 g/mu is used, and 500 g/mu is used by using EM once in the second day after disinfection; the fertilizer water paste or algae power is used once a day in the shrimp culture area, and the using amount is 3 kg/mu; supplementing diatom dry algae seeds once per week in the shrimp culture area, wherein the dosage is 0.1 kg/mu; an aerator is properly used for aeration according to weather conditions;
(c) Catching: in the middle and last ten days of October, capturing shrimps, stopping bait feeding in the shrimp culture area, and keeping other culture modes unchanged; catching crabs and shellfish before and after spring festival; and (4) calculating the yield of the obtained portunids, the obtained palaemon carinicauda and the obtained sinonovacula constricta.
Comparative example 1
The comparative example is a traditional method for polyculture of crabs, shrimps and shellfish in the same pond, and specifically comprises the following steps:
(a) Arranging a culture pond: the cultivation pond is trimmed and then disinfected to meet the cultivation requirement; the total area of the culture pond is 30 mu, no culture area is divided in the culture pond, and the culture pond is provided with a water inlet and a water outlet;
(b) Culturing: putting crabs, shrimps and shellfish into the culture pond for aquaculture, wherein the putting varieties, the putting time and the putting quantity are the same as those in the embodiment 1; water is changed through the water inlet and the water outlet every day in the culture process; feeding baits in the crab culture area and the shrimp culture area every day, wherein the types and the number of the fed baits are uniform, and the embodiment 1 is the same; the water quality management method is the same as that of the embodiment 1; the fertilizer paste or algae power is used once a day, and the dosage is 1 kg/mu; supplementing the diatom dry algae once every week, wherein the dosage is 0.03 kg/mu;
(c) Catching: in the middle and last ten days of October, capturing shrimps, stopping bait feeding in the shrimp culture area, and keeping other culture modes unchanged; and (4) calculating the yield of the obtained swimming crabs, the obtained palaemon carinicauda and the obtained Sinonovacula constricta.
The results of the three water production yields of example 1 and comparative example 1 are shown in table 1.
TABLE 1 results for three aquatic yields for example 1 and comparative example 1
As can be seen from table 1, the total area of the ponds of example 1 and comparative example 1 is 30 mu, and the cultivation method used in example 1 can improve the yield of three varieties of crabs, shrimps and shellfish compared to the conventional cultivation method of comparative example 1. Particularly for portunids, the water quality in the crab culture area is more suitable for the growth of the portunids due to the regional separated culture, the yield of the portunids in the embodiment 1 is obviously higher than that in the comparative example 1, and the culture method is particularly suitable for improving the yield of the portunids in the mixed culture process.
Claims (10)
1. The method for in-situ serial breeding of crabs, shrimps and shellfish in the same pond is characterized by comprising the following steps:
(a) Arranging a culture pond: the cultivation pond is trimmed and then disinfected to meet the cultivation requirement; the aquaculture pond comprises a crab aquaculture area (1), a shrimp aquaculture area (2) and a shellfish aquaculture area (3), the crab aquaculture area is provided with a water inlet valve (4), a first water change gate (5) is arranged between the crab aquaculture area and the shrimp aquaculture area, a second water change gate (6) is arranged between the shrimp aquaculture area and the shellfish aquaculture area, and the bottom of the shellfish aquaculture area is provided with a water outlet pipe (7) with a switch;
(b) Culturing: putting crabs in the crab culture area, putting shrimps in the shrimp culture area, and putting shellfish in the shellfish culture area for aquaculture; the water is changed every day in the culture process, and the water changing method comprises the following steps: opening a water outlet pipe to discharge water accounting for 60 to 80 percent of the water in the shellfish culture area, closing the water outlet pipe, sequentially opening a second water changing valve, a first water changing valve and a water inlet valve until the water level in the culture pond meets the requirement, and closing the second water changing valve, the first water changing valve and the water inlet valve; feeding baits in the crab culture area and the shrimp culture area every day;
(c) Catching: in the middle and last ten days of October, capturing shrimps, stopping bait feeding in the shrimp culture area, and keeping other culture modes unchanged; before and after the spring festival, the crabs and the shellfish are caught.
2. The in-pond ex-situ tandem breeding method of crabs, shrimps and shellfish according to claim 1, wherein the crabs are portunids, the shrimps are exopalaemon carinicauda, and the shellfish are sinonovacula constricta.
3. The method for the ex-situ serial culture of crabs, shrimps and shellfish in the same pool according to claim 1, wherein in the culture pool, the crab culture area accounts for 50 to 70 percent of the total area of the culture pool, the shrimp culture area accounts for 25 to 35 percent of the total area of the culture pool, and the shellfish culture area accounts for 5 to 15 percent of the total area of the culture pool.
4. The in-pond ectopic series breeding method of crabs, shrimps and shellfish as claimed in claim 1, wherein the depth of the crab breeding area and the shrimp breeding area is 1.5 to 1.8m, and the depth of the shellfish breeding area is 0.8 to 1m.
5. The method for the ex-situ serial culture of crabs, shrimps and shellfish in the same pond according to claim 1, wherein a first water pump (8) is arranged in the shrimp culture area, and a second water pump (9) is arranged in the shellfish culture area.
6. The method for the ex-situ serial culture of crabs, shrimps and shellfish in the same pool according to any one of claims 1 or 2, wherein the putting time of the crabs is 5 months, the types of the crabs are I-stage portunids, and the putting density is 1 to 1.5 ten thousand per mu; the feeding time of the shrimps is 5 months early, the feeding type is exopalaemon carinicauda, and the feeding density is 1.5 to 2.5 kg/mu; the shellfish is put for 4 months, the type of the shellfish is sinonovacula constricta seedlings, the size of the sinonovacula constricta seedlings is 5000 granules/jin, and the putting density is 35-45 ten thousand granules/mu.
7. The in-pond ectopic series breeding method of crabs, shrimps and shellfish according to claim 1, wherein in step (b), the bait fed into the crab culture area is fresh trash fish, and the bait fed into the shrimp culture area is compound feed, wherein the compound feed comprises the following components in parts by weight: 10 to 12 parts of fish meal, 15 to 18 parts of soybean meal, 8 to 10 parts of peanut meal, 5 to 15 parts of wheat, 5 to 8 parts of beer yeast, 5 to 12 parts of hard flour, 1 to 2 parts of calcium dihydrogen phosphate for feeds, 2 to 5 parts of fish oil, 1 to 2 parts of vegetable oil, 2 to 5 parts of shrimp shell powder, 1 to 3 parts of wheat gluten, 1 to 3 parts of zeolite powder, 1 to 2 parts of compound mineral substances, 0.5 to 1 part of compound vitamin and 0.2 to 0.5 part of choline chloride.
8. The in-tank ex-situ and in-series aquaculture method for crabs, shrimps and shellfish as claimed in claim 7, wherein in step (b), the bait feeding amount in the crab aquaculture area is 8 to 10% of the weight of the crabs, and the bait feeding amount in the shrimp aquaculture area is 3 to 5% of the weight of the shrimps.
9. The method for the ex-situ serial culture of crabs, shrimps and shellfish in the same pond according to claim 1, wherein the water quality management is also performed in the step (b), and the water quality management method comprises the following steps: chlorine dioxide is used for comprehensively disinfecting 3 culture areas once every ten days, wherein the disinfection is carried out once at 600 g/mu each time, and EM bacteria are used once the next day after disinfection, and the disinfection is carried out once at 500 g/mu each time.
10. The method for the ex-situ and serial culture of crabs, shrimps and shellfish as claimed in claim 1, wherein in the step (b), the shrimp culture area uses the water fertilizing paste or algae power once a day, and the dosage is 3 kg/mu; the shrimp culture area is supplemented with diatom dry algae seeds once a week, and the dosage is 0.1 kg/mu.
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