Artificial breeding method of Spisula sachalinensis (Schrenck)

Abstract

The invention discloses an artificial breeding method of Spisula sachalinensis (Schrenck), which is characterized by comprising the following steps: fishing and catching individuals as parents from a natural environment when the water temperature in a natural sea area is below 12 DEG C in spring; placing the parents in an indoor water body for warming and ripening, feeding the parents with spirulina powder, egg yolk, starch and unicellular algae baits, and breeding at a constant temperature; stimulating the parents to discharge ova and sperms by a chemical method, and incubating oosperms into D-shaped larvas; transferring the D-shaped larvas into a pond for breeding by a silk net, wherein the larva breeding density is 0.5-1 larva / ml, and the D-shaped larvas are fed with Isochrysis zhanjiangensis at the early stage, and are fed with the Isochrysis zhanjiangensis and Tetraselmis at the later stage; collecting and transferring the larvas to another pond for breeding when the shell of the larva grows to 280-300 mu m and feet grows out, and enabling the larvas to finish settlement and metamorphosis at the bottom of the pond by adopting an adherence-free collection technology; and transferring juvenile mollusks to the outdoor for intermediate breeding when the shell of the mollusk grows to 1.5-2mm. By the artificial breeding method of the invention, artificial seedlings of Spisula sachalinensis (Schrenck) can be bred in a large scale.

Description

technical field [0001] The invention relates to an artificial breeding method of shellfish, in particular to an artificial breeding method of thick clam from Sakhalin Island. Background technique [0002] Sakhalin thick clam (Pseudocardium sachalinense), commonly known as arctic shellfish, belongs to the clambranch class, heterodentate subclass, clam order, clam family, is a cold-water shellfish distributed in the northern coast of Japan, Sakhalin Island, and the east coast of the Korean Peninsula. kind. Adult shellfish mainly live in the subtidal zone to 12m deep sand bottom and shallow sea area, and are the most important tidal flat economic shellfish in the northeast of Japan and the coastal areas of Hokkaido. In 2002, the total output value of Hokkaido, Japan reached 55 million US dollars. Thick clams from Sakhalin Island have thick shells and are heart-shaped. They are large in size. The adult shell length is 9-10cm, the shell height is 7-8cm, and the shell width is 4...

AI Technical Summary

Problems solved by technology

Basically, we have figured out the reproductive habits, growth habits and embryonic development characteristics of Sakhalin Island thick clams, and mastered the methods of artificial breeding to induce spawning, but we have not solved the key methods such as larva attachment metamorphosis and juvenile shell cultivation, and have not established a complete system. The large-scale artificial seed production system has not realized the complete artificial breeding of thick clams in Sakhalin Island