Method for carrying out relay culture on Ietalurus Punetaus and freshwater shrimps in culture pond

Abstract

The invention discloses a method for carrying out relay culture on Ietalurus Punetaus and freshwater shrimps in a culture pond. The method comprises the steps of pond preparation, freshwater shrimp and Ietalurus Punetaus fry stocking, culture management, aquatic product capture and the like. According to the method, mutual benefits are achieved on the culture habit and culture crop rotation connection of the aquatic product species: 1) the fertility and the plankton amount of pond water left in the previous culture stage are reasonably utilized; 2) the production efficiency of the pond is brought into full play, and one batch of market commercial Ietalurus Punetaus and two batches of large-size commercial freshwater shrimps are ecologically and efficiently cultured in a three-year cultureperiod; 3) in the Ietalurus Punetaus culture stage, the fingerling stocking density is reasonably reduced, the scale disease occurrence rate is low, the fry survival rate is high, and the feed utilization rate is high; (4) feed, fishery drugs and other input products are used in a decrement mode, environment-friendly water quality regulation measures are reasonably used, ecological benefits are outstanding, and (5) ecological and efficient effects achieved through the relay breeding method have high practical application and popularization value.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for carrying out "green shrimp + channel catfish + green shrimp" relay culture in a culture pond. Background technique [0002] At present, the main fishing conditions for channel catfish pond culture in the middle and lower reaches of the Yangtze River are as follows: 1) Channel catfish is tender in quality, delicious in taste, has no scales and few spines, and is easy to slaughter and cook. Foodstuffs are very popular in the market, and the domestic consumption market is rising and expanding year by year. In addition, on November 5, 2019, the United States officially confirmed that the Chinese catfish regulatory system is equivalent to the favorable trade factors of the United States, and the channel catfish farming situation is getting better; 2) spot The reproduction of catfish fry is limited by air temperature and water temperature, and the fry will ...

AI Technical Summary

Problems solved by technology

[0002] At present, the main fishing conditions for channel catfish pond culture in the middle and lower reaches of the Yangtze River are as follows: 1) Channel catfish is tender in quality, delicious in taste, has no scales and few spines, and is easy to slaughter and cook. Foodstuffs are very popular in the market, and the domestic consumption market is rising and expanding year by year. In addition, on November 5, 2019, the United States officially confirmed that the Chinese catfish regulatory system is equivalent to the favorable trade factors of the United States, and the channel catfish farming situation is getting better; 2) spot The reproduction of catfish fry is limited by air temperature and water temperature, and the fry will not hatch until mid-June, after which they can be cultivated into summer flower fish species after about 20d-30d of growth; 3) Channel catfish is grown from summer flower fish species (3cm-5cm ) It takes at least 2 years to grow to the most marketable commercial fish size (1.25kg/tail-1.6kg/tail) in the market; 4) Excluding a few channel catfish scale farms (bases), the channel catfish breeding is divided into fry to large sizes In addition to the two stages of fish fingerling (about 50g/tail) cultivation and large-scale fish fingerling to food fish farming, the culture mode of directly growing catfish summer flowers to commercial catfish for sale is normal; 5) From raising catfish summer flowers to The breeding mode of commercial catfish is limited by the late hatching and emergence of catfish and the long breeding cycle of commercial catfish. Most of the breeding ponds are idle in the first 6 months of the first year and the last 6 months of the third year, that is to say , during the 3-year breeding period, the po

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