Three-stage type breeding method for large meretrix larvae suitable for northern cold sea areas in China

Abstract

The invention discloses a three-stage type breeding method for large meretrix larvae suitable for northern cold sea areas in China. The first stage comprises the processes such as parent meretrix screening, spawning, fertilized egg incubation, indoor artificial breeding of floating larvae and umbo larva metamorphosis and attachment, juvenile meretrix with the shell length of about 0.9 mm is bred,and the stage lasts from the end of June to the middle ten days of October. In the second stage, the juvenile meretrix is subjected to overwintering breeding in an outdoor pond until the shell lengthis about 4.5 mm, and the stage lasts from the middle ten days of October to April in the second year. In the third stage, the overwintering juvenile meretrix is subjected to intermediate breeding in the outdoor pond until the shell length is 1.0 cm or above, and the stage lasts from about April to July. According to the method, technical guarantee is provided for large-scale production of the large meretrix larvae, and sufficient larva supply is provided for the development of the meretrix 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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