A kind of method for secondary cultivation of loach seedlings

Abstract

The invention discloses a method for secondary cultivation of loach seedlings, which includes a primary cultivation stage and a secondary cultivation stage, wherein the step of the primary cultivation stage comprises: placing freshly hatched loach seedlings in a net cage for cultivation, and Provide palatable feed; the step of the secondary cultivation stage includes: placing loach seedlings in the pond at the rotifer peak period through primary cultivation, providing palatable feed, and reducing the amount of feed fed during the conversion period of loach seedling gill respiration to intestinal respiration , carry out parasite prevention in time in the later stage of cultivation, and keep the sufficient oxygen content of the water body, grow to 4~5cm to the loach seedling length, finish the loach seedling cultivation process; Compared with the prior art, the present invention has guaranteed the loach seedling survival rate from The existing average level of less than 10% is increased to more than 40%, which is suitable for cultivating loach seedlings and has broad application prospects.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a method for secondary cultivation of loach fry. Background technique [0002] Loach (Misgurnus arguillicaudatus) is a small freshwater economic fish belonging to Cyprinidae, Loachidae, and Loach genus. It is one of the best raw materials for processing animal protein powder and one of the main varieties of aquatic products exported in my country. Loach meat is tender and delicious. Its meat contains 18.45%-20.7% protein, 2.7%-2.8% fat, 1.6%-2.2% ash, and every 100 grams of meat contains vitamin A70IU, vitamin B440μg, calcium 51mg, phosphorus 154mg, iron 3mg , and has higher unsaturated fatty acids. Loach has certain medicinal effects, such as regulating the middle and replenishing qi, quenching thirst and sobering up. Loach is widely distributed in waters such as rivers, ditches, paddy fields, ponds, lakes and reservoirs. Due to overfishing and the deterioration of habitats, wild re...

AI Technical Summary

Problems solved by technology

[0004] The main reasons for the low survival rate of loach seedlings mainly come down to the following points: 1) the ability of the loach seedlings to swim just under the pond is extremely poor, and it is difficult to find suitable feed, which causes many loach seedlings to sink to the bottom of the pond and suffocate; During the transition period from gill respiration to intestinal respiration of seedlings, if loach eats too much, it will easily lead to death; 3) In the later stage of seedling cultivation, parasites will multiply, which will easily lead to a large number of deaths