Parent crassostrea nippona breeding method for promoting maturity and spawning

Abstract

The invention provides a parent crassostrea nippona breeding method for promoting maturity and spawning. The method comprises the steps of firstly, selecting and placing parent crassostrea nippona in a nursery pond for maturity-promoting breeding; feeding the parent crassostrea nippona with crassostrea nippona monodus subterraneus bait, and conducting maturity-promoting breeding on the crassostrea nippona by raising the temperature step by step, so that gonad of the parent crassostrea nippona achieves maturity; drying the parent crassostrea nippona achieving gonad maturity in the shade, and then placing the parent crassostrea nippona into a spawning pond; picking out female mature pacific oysters through microscopic examination, taking out ova through dissection, filtering the ova with a screen, and removing tissue fragments and pacific oyster ova, so that tissue filtered fluid is obtained; adding the tissue filtered fluid into the spawning pond, and inducing the parent crassostrea nippona to spawn and discharge seminal fluid; finally, moving away the parent crassostrea nippona, so that fertilized ova of artificial breeding are obtained. By means of the method, the problems that it is difficult for parent crassostrea nippona bred through indoor artificial maturation-promoting breeding to get mature and spawn can be solved, the parent crassostrea nippona spawns quickly, spawn quality is good, the artificial breeding production requirements for the crassostrea nippona are satisifed, and the foundation is laid for large-scale production of the crassostrea nippona.

Description

technical field [0001] The invention relates to a method for artificially raising seedlings of rock oysters, in particular to a method for promoting maturation and laying eggs of rock oysters. Background technique [0002] Rock Oysters ( Crassostreanippona ) belongs to the phylum Molluscs, Phyllobranches, Oysteridae, and the genus Giant Oyster, and is an important marine economic bivalve mollusk. Rock oysters are mainly distributed in Japan, Australia and other places. They have the characteristics of large body, fast growth, high yield, high meat yield, high temperature resistance, strong disease resistance, and strong environmental adaptability. They are the latest developed excellent species of cultured oysters. . The suitable season for eating rock oysters is summer, which is also called summer oysters in Japan, while the suitable season for domestically cultivated Pacific oysters is winter. Because Pacific oysters reproduce in spring, the glycogen content in summer Pa...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the object of the present invention is to provide a method for promoting maturation and spawning of rock oyster broodstock, the method increases the spawning amount of broodstock by carrying out targeted research on the gonadal maturation of rock oyster broodstock , to overcome the shortcomings of the existing rock oyster artificial breeding technology