A method for inducing high-efficiency attachment metamorphosis of Hong Kong oyster

Abstract

The invention discloses a method for inducing high-efficiency attachment metamorphosis of Hong Kong oysters. It includes the following steps: 1) After the Hong Kong oyster larvae are cultivated to a certain specification, start to reduce the salinity of the culture water body every day, and routine feeding management; 2) Move the cleaned and sterilized attachment base into the attachment metamorphosis pool, and fill it with water for the first time , then drained, inject micron-scale filtered seawater for the second time, add EDTA, air head; 3) when the ratio of eye-spot larvae reaches more than half of the number by microscope inspection, pour the pond and sieve, and move the large seedlings into the attachment of step 2) Metamorphic pool, and then evenly sprinkle ZnCl into the pool 2 Induce the solution, inflate and mix well; 4) After the attachment and metamorphosis of the eye-spot larvae is completed, drain the water completely, re-inject the micron-level filtered seawater, and feed in a reduced amount on the first day, increase on the second day, and double the feeding after 72 hours manage. The method of the invention is simple and easy, suitable for large-scale production, application and popularization, and also has obvious promoting effect on other oysters.

Description

technical field [0001] The invention relates to the technical field of shellfish seed breeding in marine agriculture, in particular to a method for inducing high-efficiency attachment and metamorphosis of Hong Kong oysters. Background technique [0002] Hong Kong oyster (Crassostrea hongkongensis) is the main economic species cultured in the coastal areas of South my country. It likes to live near estuaries or places with fresh water injection. It is mainly distributed in Guangdong, Guangxi and other places, with an annual output of more than 1.7 million tons and an output value of 30 billion. Yuan (China Fisheries Yearbook, 2019). Compared with other types of oysters, the value of Hong Kong oysters is mainly reflected in their large body, fat meat and delicious taste. In addition, their market value is much higher than other types of oysters. They are favored by consumers in Guangdong, Guangxi, Hong Kong, Macao, and Southeast Asian countries and regions (Zhang Yuehuan et al...

AI Technical Summary

Problems solved by technology

In recent years, in response to market requirements, Hong Kong oyster artificial seedling technology has been greatly developed. Compared with other oysters, the artificial seedling efficiency of Hong Kong oyster is still not high, mainly because the larval metamorphosis rate is not ideal. Technical bottleneck, the present invention specially designed a set of highly efficient technical methods for inducing metamorphosis