Method for spat culture of Vietnam mactra veneriformis

Abstract

The invention discloses a method for spat culture of Vietnam mactra veneriformis. The method comprises the following steps of (1) selecting parent shells of Vietnam mactra veneriformis with full gonads, drying in a shady area, stimulating, and inducing to lay spawns and sperms; (2) washing the spawns, and hatching; (3) culture of larva: after a zygote grows into a D type larva, setting the spat culture density to 5-8 spats per milliliter, and feeding isochrysis, wherein the feeding quantity is 30000 to 100000 isochrysis per milliliter, and 1/3 to 1.2 of water is replaced at morning and night each day; (4) after the D type larva enters the later larva phase, moving the D type larva into an outdoor water tank with bottom sand, wherein the water depth is 100cm, the water temperature is 25 to 32 DEG C, the salt content is 80 to 260%, and the sinking attaching density of larva is 10000 to 15000 larva per liter; (5) when the young shell density exceeds 120 young shells per square centimeter, loosening the spats. The method has the advantages that the spat culture density is increased, and the industrialized large-batch spat culture is realized; according to the mucus secretion habit of the Vietnam mactra veneriformis larva, the sand stone is fed into the culture tank to absorb the mucus, so as to avoid the death of Vietnam mactra veneriformis larva.

Description

technical field [0001] The invention relates to the technical field of shellfish culture, in particular to a method for raising seedlings of Vietnamese white clams. Background technique [0002] The Vietnamese white clam (Meretrix lyrata), also known as Meretrix lyrata, belongs to the clam order and the clam family. It is mainly distributed in Vietnam, Guangxi, Taiwan and other regions. This variety has delicious meat, rich nutrition, and fast growth. It is very popular with consumers and farmers. It has now become the leading shellfish cultured in Vietnam and other countries and regions. Its price has been rising in recent years, and the breeding prospect is promising. Vietnamese white clam is a wide-temperature and wide-halt shellfish, which can be cultivated in ponds, tidal flats, and shallow seabeds. It is suitable for promoting cultivation in southern regions such as Fujian, Zhejiang, and Guangdong in China. [0003] Vietnamese white clams have gone through a number...

AI Technical Summary

Problems solved by technology

[0003] Vietnamese white clams have gone through a number of tedious processes from brood induction, larvae cultivation to juvenile shell out of the pond. Due to the high requirements for water quality, cumbersome process, and long cycle, the seedlings are easily affected by bait, water quality, and bottom quality. Therefore, There needs to be a practical method to solve the problem of raising seedlings of Vietnamese white clams