A kind of clam selection breeding family cultivation establishment method

Abstract

The invention discloses a method for establishing a clam selection breeding family and establishing a family. Through the connection of closed culture, marking and open culture of the clam, the effective cultivation and establishment of the selective breeding family of the clam can be realized. The present invention adopts the above-mentioned measures, utilizes the culture characteristics of the clam, and adopts segmented culture to establish the family of the clam: in the early and mid-term, the shellfish are cultivated and marked based on closed culture, which is beneficial to the early screening and reduction of the family. Cultivation is migratory; in the later stage, open culture is used to grow shellfish, which is conducive to growth and fattening. The segmental integration of the two breeding methods restricts the range of adult shellfish cultivation in the later stage, ensures the stable establishment of the family line, and provides seed shellfish with excellent gonad development for subsequent breeding work, which can be cycled according to the traits required for breeding, ensuring that Breeding Sustainability. The present invention has stably established a clam clam family with a total body rate of more than 67% and successfully bred F2 and F3, and has strong operability and practicability.

Description

technical field [0001] The invention relates to a method for establishing a clam breeding family and belongs to the technical field of bivalve mollusc breeding in aquatic science. Background technique [0002] Blunt clam ( Tapes dorsatus ), also known as sand-wrapped snails, belongs to the clambranchia, the clam order, the clam family, and the clam genus. It is mainly distributed in the tropical and subtropical sea areas of the Southwest Pacific Ocean, and is common in the southeast coast of my country. The clam is mainly buried in the shallow sea sediment in the subtidal zone to a water depth of 15m. Over the years, the selection and breeding of shellfish families has made great contributions to the prosperity and development of the marine shellfish aquaculture industry. The purpose of establishing the selection and breeding families is to provide research materials for family comparison and family retention, and finally realize the production of improved species. As one ...

AI Technical Summary

Problems solved by technology

As one of the representative shellfish for bottom sowing, it takes more than one and a half years for the clam to grow from seedlings to adults. The conventional culture is open, and the environmental factors including predatory organisms are unstable. The survival rate of the early culture is low, which is not conducive to Stable establishment and comparison of small population families

There is also the phenomenon of individual migration during the breeding process of the clams, which leads to the need for greater isolation in the cultivation of different families. The establishment of multiple lines in the early stage of breeding requires a large breeding space, which is not conducive to management operations.

At the same time, in open breeding waters, germplasm resources are mixed, and it is difficult to distinguish cultured and wild individuals during the breeding process. Even molecular means are not conducive to family purification.