A kind of breeding method of pond butterfly mussel juvenile mussel

Abstract

The invention provides a method for breeding juvenile mussels of hyriopsis schlegeli. The method is characterized by comprising the following steps of cultivation of breeding mussels, larva collection, cultivation of juvenile mussels at a parasitic stage, cultivation of juvenile mussels after juvenile mussel escape and cultivation of small mussels. Preferably, the breeding mussels are 4 to 5 yearsold mussels; the breeding mussels are selected in late autumn, and the selected breeding mussels are cultivated in a special pond; the host fish is pelteobagrus fulvidraco; the host fish is fed withthe mussel meat for nutritional fortification cultivation; the density of glochidia attached to the host fish is 30,000 to 40,000 per kilogram of the host fish; and in the steps of the cultivation ofjuvenile mussels at the parasitic stage, the cultivation of juvenile mussels and cultivation of small mussels, the stocking densities are 1 to 1.5kg / m<2>, 20,000 to 30,000 / m<2> and 150 to 250 / m<2>respectively, and the flow rates are controlled to be 1 to 1.5T / h, 0.5 to 2T / h and 2 to 3T / h respectively. Each day, the nutritional mud is quantitatively added once, and the pond is at least cleanedtwice. By the method, the rate of emergence of the juvenile mussels of the hyriopsis schlegeli is 30,000 to 40,000 mussels / m<2> and improved by 30 percent; and the juvenile mussels bred by the methodhave strong physique and order specifications.

Description

technical field [0001] The invention relates to a breeding method of young clam clams, belonging to the field of breeding methods of freshwater shellfish. Background technique [0002] At present, my country's pearl output has reached more than 1,800 tons, and more than 98% are freshwater pearls. my country's pearl output accounts for more than 95% of the world's total output, and has become the world's largest pearl producing country, but its output value only accounts for 10% of the world's total pearl output value. Problems are an important factor in the decline in pearl size and quality. Therefore, Shanghai Ocean University and Wangjiajing Pearl Farm in Zhuji City, Zhejiang Province carried out a joint research. From 2000 to 2006, it took 7 years to jointly cultivate a new species of Kangle mussel [Pond butterfly mussel Hyriopsis schlegeli (♀) × Triangle sail mussel Hyriopsis Cumingii ( )], National Variety Registration Number: GS~02~001~2006, in January 2007, it was ...

AI Technical Summary

Problems solved by technology

[0003] Mollusca is a mollusk phylum, which belongs to Bivalvia Bivalvia, Eulamellibranchia Eulamellibranchia, Unionidae, and Hypriosis, which belong to the same genus as Hypriosis, and are native to Lake Biwa and Chixia Lake. , the butterfly mussel is the main pearl-breeding mollusc of Japanese freshwater pearls. Our country introduced the butterfly mussel from Japan in 1997. At present, the breeding technology of the butterfly mussel completely copies the corresponding technical regulations of the triangular sail mussel, which exposes the low emergence rate and insufficient yield. The problem of stability, in order to expand the scope of promotion of Kangle mussels, it is necessary to establish a stable parent mussel hybrid line