Method for selectively breeding bivalve shellfish

Abstract

The invention discloses a method for selectively breeding bivalve shellfish at an attachment stage, which comprises the following steps of: putting synchronous fertilized eggs of the bivalve shellfish into a nursery pond to perform culture till the fertilized eggs are grown to a veliger stage; when 30 to 40 percent of larvae have eye spots, putting attachment matrixes into the nursery pond; determining the times and amount of fed baits every day according to the condition of larva stomachs under a microscope; changing the water once to twice every day; when the attachment rate of the larvae is 10 to 30 percent, taking the attachment matrixes attached with the larvae out to perform separate culture; and breeding the larvae taken out in the previous step at a reduced temperature, reducing the temperature by 1 to 2 DEG C every day till the temperature is reduced to the temperature of natural seawater, and directly culturing the larvae on the sea. The invention provides the efficient and large-scale selective breeding method, which solves the problems of small basic population scale of selectively breeding the bivalve shellfish, high selective breeding cost, difficult process operation, single selective breeding target and the like.

Description

technical field [0001] The invention relates to a breeding method for bivalve molluscs, and in particular provides a breeding method for bivalve molluscs in the attachment period. Background technique [0002] Selective breeding of bivalve molluscs is an important part of the whole bivalve mollusc farming industry in my country. Bay scallops (Argopectens irradians), also known as Atlantic inner bay scallops, are a type of bivalve mollusk, native to the Atlantic coast of the United States. The shell is fan-shaped, the two shells are almost equal, and the shell surface is dark brown or brown. Most of the bay scallops are distributed at 3-10m below the sea surface. They are more pungent, with a temperature tolerance range of -1-31°C, stop growing below 5°C, grow slowly below 10°C, and grow faster at 18-28°C; their salt tolerance range is 16°C. ‰-43‰, suitable salt range 21‰-35‰. The bay scallop is a filter feeder and has the ability to select the size of food, but not the ty...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-efficiency and large-scale breeding method suitable for the attachment period of bivalve molluscs, which overcomes the small scale of the basic population of bivalve molluscs breeding in the prior art and the difficulty of breeding. Problems such as high cost, difficult operation and single breeding goal