A method for promoting gonad development of cockles

Abstract

The invention provides a method for improving gonad development of tegillarca granosa. The gonad development of the tegillarca granosa is improved by feeding thraustochytrium roseum during cultivation of parent scallops of the tegillarca granosa. The gonad development of the tegillarca granosa is greatly fastened by feeding the thraustochytrium roseum in cultivation of the parent scallops of the tegillarca granosa, egg-laying time of the parent scallops of the tegillarca granosa is effectively controlled, management of breeding production of seedlings of the tegillarca granosa is greatly facilitated, and ovulation rate of the parent scallops of the tegillarca granosa is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for promoting gonad development of cockles. Background technique [0002] Mud clam (Tegillarca granosa), belonging to the phylum Molluscs, class Bivalva, order Dendonta, family Cranaceae, genus Cranosa, is a traditional cultured shellfish in the southeast coast of China. Since the 1980s, due to the deteriorating coastal environment and the intensification of human sea-related activities, the natural seed resources of mud cockles have become increasingly scarce, and now the seeds needed for mud cockle farming are entirely from artificial cultivation. [0003] The normal breeding season of mud cockles is in summer, and according to different geographical distributions, from Guangdong, Guangxi to Shandong, mud cockles enter sexual maturity in turn from late May to early August. For industrial nursery enterprises, the use of open-air natural mature cockles a...

AI Technical Summary

Problems solved by technology

For industrial nursery enterprises, the use of open-air natural mature cockles as broodstock has the following disadvantages in the production process: 1. The gonads are not developed synchronously, and the spawning rate cannot be guaranteed; 3. Harmful microorganisms breed in high temperature seasons, and the success rate of seedlings decreases

[0004] However, using these maturation-promoting methods, it generally takes about 2.5-3 months for the brood clams to gonad fully mature from entering the room, and the synchronization of gonad development is not ideal, and it is impossible to ideally control the complete maturation time of the cockle gonads.