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

A technology of attachment metamorphosis, Hong Kong oyster, applied in the direction of climate change adaptation, application, fish farming, etc., can solve the problems of low efficiency of artificial seedlings, unsatisfactory larval attachment metamorphosis rate, etc., to improve the attachment metamorphosis rate and shorten the time. Effect

Active Publication Date: 2021-12-03
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment is completed in the southeast test station of Donghai Island in Zhanjiang. Specifically, 10 culture ponds are used, and the total number of attached metamorphic water bodies reaches 200m 3 , the total number of treated larvae reached more than 250 million.

[0027] A method for inducing high-efficiency attachment metamorphosis of Hong Kong oysters, comprising the following steps:

[0028] (1) After the Hong Kong oyster larvae were cultured to the 13th day, about 50% of the larvae reached a size of 320 μm, and the salinity of the culture water was reduced by 2‰ every day until the salinity was adjusted to 10‰. At this time, the larva culture density was adjusted to about 2.5 / mL, and the cloud microalgae and concentrated chaetoceros were fed;

[0029] (2) Two days before the induction of attachment metamorphosis, start the preparation of the attachment metamorphosis pool: move the cleaned and sterilized attachment base into the attachment metamorphosis po...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/54
CPCA01K61/54Y02A40/81
Inventor 肖述喻子牛张扬向志明
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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