Two-stage cultivation method for loach offspring seeds

Abstract

The invention discloses a two-stage cultivation method for loach offspring seeds. The two-stage cultivation method includes a primary cultivation stage and a secondary cultivation stage. The primary cultivation stage includes putting newly hatched loach offsprings in a net cage for cultivation and providing palatable feed; the secondary cultivation stage includes putting the loach offsprings subjected to primary cultivation in a pond in the peak season of rotifer, providing the palatable feed, reducing feeding quantity of the feed during the conversion period from branchial respiration to intestinal respiration of the loach offsprings, preventing parasites timely in the later period of cultivation, maintaining sufficient oxygen content of water, and completing the cultivation process of the loach offspring seeds until the length of the loach offsprings reaches 4-5cm. Compared with the prior art, the two-stage cultivation method has the advantages that survival rate of the loach offsprings is increased to more than 40% from present less than 10% in average, and the method is applicable to cultivation of the loach offspring seeds and has a broad application prospect.

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