A kind of water breeding method of new whitebait subsidence area of ​​Taihu Lake

Abstract

The invention discloses a technology for propagating and culturing neosalanx taihuensis in a water area of a subsidence area and belongs to the field of propagating and culturing commercial fishes. The technology comprises the following steps: mixing rare earth elements La, Rd and Pr at a mass ratio of 9:9:3 in a germ cell incubation period; dissolving with double distilled water until the volume is 10.0g / L, storing, diluting until the concentration is 3.0mg / L, and adding a neosalanx taihuensis incubator after each time fresh water replacement; feeding larval fishes by use of a three-section method, and putting algae at the later stage of incubation; putting 70% of rotifers, 15% of algae and 15% of copepoda in the flat swimming period; putting 70% of remiped cladocerans, 20% of rotifer and 10% of algae in the front stage of putting; after the larval fish feeding period is finished, putting fish fries into a water surface of a huainan subsidence area, wherein the fish fries are put into multiple putting places at the same time. The technology is capable of shortening the neosalanx taihuensis incubation time, improving the success rate, achieving good growth vigor in the larval fish feeding period and laying a foundation for successful large-scale transplantation of neosalanx taihuensisin in the water area of the subsidence area according to the water area condition of the huainan subsidence area.

Description

technical field [0001] The invention belongs to the technical field of breeding and breeding of economic fish, and more specifically relates to a technique of breeding and breeding new whitebait in the subsidence area of ​​Taihu Lake. Background technique [0002] Taihu new whitebait, (NeosalanxtaihueChen), noodle fish, noodle fish, silverfish family, Neosalanx genus, body slender, nearly cylindrical, slightly flattened at the rear, body length about 12 cm, extremely flat head, The eyes are big, the mouth is also big, the snout is long and pointed, triangular in shape, the body is soft without scales, the whole body is transparent, and the body is milky white after death. Taihu new whitebait is a pure freshwater fish that lives in the lake all its life, feeds mainly on zooplankton, and also eats a small amount of shrimp and fry. Whitebait is an annual, reaching sexual maturity in half a year, and the broodstock can reproduce at the age of one winter. The spawning period is ...

AI Technical Summary

Problems solved by technology

(Hu Jun et al. "my country's Whitebait Resources Distribution and Processing Overview" 2010) shows that although since the 1980s, large-scale water systems in 27 provinces (municipalities) except Tibet and Taiwan have been developed. Large-scale transplantation of whitebait, but not many have achieved significant economic benefits, and the success rate is less than 30%.

There are many reasons for the failure of silverfish transplantation, among which the lack of research on the biological characteristics of whitebait, lack of understanding of the characteristics and ecology of the introduced water system, poor management of the transplantation process, and lack of post-management are common reasons

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