Method for ripening acceleration and breeding of parent oysters of Mytilus Galloprovincialis

Abstract

The invention relates to a method for artificially raising larvae of Mytilus Galloprovincialis, in particular to a method for ripening acceleration and breeding of parent oysters of Mytilus Galloprovincialis. The method comprises the steps: performing ripening acceleration and breeding on Mytilus Galloprovincialis parent oysters with good gonad development through stage heating so as to achieve sexual maturity of gonads of the parent oysters; then performing drying in the shade, putting the dried parent oysters in sand-filtered seawater at 18-19 DEG C so as to induce the parent oysters to layeggs, and when the density of the eggs reaches 15-30 / ml, adding male parent oyster semen which is collected during the induction of ovulation so as to obtain fertilized eggs for artificial seedling raising. Through the method, the difficult problem of easy abortion of the Mytilus Galloprovincialis parent oysters in the sensitive period of ripening acceleration and breeding is solved, so that ripening acceleration of the parent oysters is more efficient and stable, mature eggs with good quality and good quantity are obtained effectively, and a basis of large-scale production of larvae of Mytilus Galloprovincialis is provided.

Description

technical field [0001] The invention relates to a method for artificially raising seedlings of blue mussels, in particular to a method for promoting maturation of blue mussels. Background technique [0002] Blue mussel Mytilus Galloprovincialis, belonging to Bivalvia, Mytilidae, Mytilidae, and Mytilus genus, commonly known as sea rainbow, mussel, common in shallow seas from the intertidal zone to 20 meters deep, widely distributed in the northeastern Atlantic Ocean, Sea areas such as the Mediterranean Sea, the North Pacific Ocean, southern Africa, and Australia are important economically cultivated shellfish. Blue mussels can adapt to large changes in temperature and salinity, and have strong vitality. They are widely distributed in the northern coastal areas of my country, with large biomass and rich seedling sources in natural sea areas. They have become one of the important cultured shellfish in my country. In 2015, China's total output of mussels was 845,000 tons, of wh...

AI Technical Summary

Problems solved by technology

[0003] At present, the breeding of blue mussels mainly relies on the collection of natural wild seedlings for production. Due to the spatiotemporal nature of gamete discharge and larval attachment of blue mussels, coupled with the influence of the sea environment, there are widespread problems of unstable collection and uneven quality of seedlings. The situation seriously affects the later cultivation management

Although in the 1970s my country had successfully broken through the technology of artificial breeding of blue mussels, the broodstock used were all naturally mature broodstock collected from the sea area during the laying season, and they were directly spawned after entering the pond. Due to the influence of the sea environment, the developmental synchronization of wild broodstock is poor, and the quality of eggs cannot be guaranteed