A three-stage cultivation method for large-scale seedlings of Meretrix meretrix suitable for the cold sea area in northern my country

Abstract

The invention discloses a three-stage cultivation method for large-scale seedlings of meretrix meretrix suitable for the cold sea area in northern my country. The first stage: screening of clam broodstock, oviposition, hatching of fertilized eggs, indoor artificial cultivation of planktonic larvae, and abnormal attachment of shell top larvae and so on, the shell length is about 0.9mm, and this stage is from the end of June to the middle of October; the second stage: the process of overwintering the clam spat in an outdoor pond until the shell length is about 4.5mm, and the time is from From mid-October to April of the second year; the third stage: the process of cultivating the overwintered meretrix meretrix spat through the middle of an outdoor pond until the shell length is more than 1.0 cm, and the time course is from April to July. The method can provide a technical guarantee for the large-scale production of clam seed, and provide sufficient seed supply for the development of the clam breeding industry.

Description

technical field [0001] The invention relates to a shellfish seed cultivation technology, and more specifically, relates to a three-stage cultivation method for large-scale clam seedlings suitable for cold sea areas in northern my country; especially suitable for cultivation in Dalian. Background technique [0002] Meretrix meretrix belongs to the phylum Molluscs, Phallobranches, Clamidae, Clamidae, and the genus Meretrix, and is one of the important marine economic shellfish in my country. Meretrix meretrix is ​​mainly distributed in coastal areas such as Liaoning, Shandong, Jiangsu, Guangxi and Taiwan in my country, as well as near the inner bays and estuaries along the coasts of Korea and Japan. As early as the late 1970s to the early 1980s, some Japanese scholars successively carried out indoor artificial breeding and multiplication experiments of clams, and made some progress, but they are still on the experimental scale. At the end of the 1970s, Xiamen University of Fi...

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Problems solved by technology

As early as the late 1970s to the early 1980s, some Japanese scholars successively carried out indoor artificial breeding and multiplication experiments of clams, and made some progress, but it is still on the experimental scale.

At the end of the 1970s, Xiamen Fisheries College and Jiangsu Marine Fisheries Research Institute took the lead in carrying out research on indoor artificial seedlings of meretrix meretrix in China, mainly focusing on artificial induction of spawning, ecological conditions for larvae cultivation, and selection of palatable bait, and achieved great achievements. Great progress, but failed to solve the problem of intermediate breeding of seedlings

However, production practice has proved that the two-stage cultivation method of meretrix meretrix is ​​not suitable for the large-scale production of meretrix meretrix seedlings in the cold sea area of ​​northern my country

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