Method for collecting indoors cultivated natural patinopecten yesoensis larvae by trawling

Abstract

The invention relates to a shellfish larva collection method, in particular to a method for collecting indoors cultivated natural patinopecten yesoensis larvae by trawling, which comprises the following steps of: in the breeding season, monitoring the gonad index of parent patinopecten yesoensis in a sea area; after the index shows that eggs are laid, monitoring larvae in the sea area in which the patinopecten yesoensis larvae appear; after the attachment rush hour of the larvae arrives, carrying out trawling filtration collection on the natural bivalve larvae in a set sea area; and then putting the filtered and collected larvae into a room for carrying out artificial culture. The method combines the natural sea area larva collection with artificial breeding, so that high survival rate and stress resistance and the genetic diversity level of the natural offspring seeds which are subjected to natural selection are kept, and the larva collection quantity is improved and the defect of unstable larva quantity of the natural larva collection is overcome by stable management of indoor cultivation. Compared with the indoor artificial breeding, the method has short cultivation time and low energy consumption, is environmental-friendly and has great significance for prompting the upgrading of the patinopecten yesoensis industry and the sustainable and healthy development of the neritic aquaculture industry.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a seedling picking method for indoor cultivation of natural scallop larvae trawl net collection. Background technique [0002] Ezo scallop (Patinopectenyessoensis Jay, 1857) is native to the coastal waters of northern Japan and the Russian Far East. After the initial introduction from Japan, research on seed breeding, intermediate breeding, and multi-culture technology was carried out, which made this species "settle down" in the northern part of the Yellow Sea in my country; through more than 20 years of multi-culture, Ezo scallop multi-culture has become a driving force for the development of the local shallow sea aquaculture industry. The pillar industry is also the largest industry in the world for the introduction and breeding of scallops. [0003] For a long time, the seedlings used to increase the culture of scallops in my country have all relied on artificial seedlings. Due to t...

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Problems solved by technology

[0004] The natural collection of seedlings of the natural Ezo scallop in the sea area is not only low in cost, easy to operate, high in economic benefits, and easy to be popularized and applied, but also the larvae in the sea area have survived the survival of the fittest, and the surviving individuals have strong stress resistance, which is the best choice for cultivating high-quality seedlings. A new way, but due to the influence of many factors such as water flow, water temperature and sea area for seedling collection, the amount of seedling collection in sea area is greatly affected by nature, and it is not easy to stabilize production

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