Ecology-imitating cultivating breeding method for parent fishes of scaphesthes macrolepis

Abstract

The invention discloses an ecology-imitating cultivating breeding method for parent fishes of scaphesthes macrolepis. The method specifically comprises the steps of parent-fish ecologic strengthening cultivating, mature parent-fish selecting, artificial inseminating, germ cell incubating and the like. By means of an artificial ecologic technologic mean, specific nutrition bait material is prepared in a matched mode, ecological factor and nutrition requirements for gonad development of the scaphesthes macrolepis are met so that gonads of the parent fishes mature naturally, any synthetic auxins are not used in a whole breeding process, mature parent fishes can lay all fish eggs at a time, and therefore it is avoided that artificial oxytocic hormones have negative effects on the parent fishes, production service life of the parent fishes is prolonged, and quality of germ cells is improved. The problem that 'little amount and many times' of fish egg laying of the parent fishes occurs when the scaphesthes macrolep is bred by using a common method is solved. The parent fishes, having the naturally-maturing gonads, of the scaphesthes macrolepis can be successfully cultivated in the method, the egg laying rate of the parent fishes reaches 58.6%, and the hatching rate of the germ cells reaches 67.3%.

Description

technical field [0001] The invention relates to a method for rapidly cultivating fish, in particular to a method for imitating ecological cultivation and reproduction of multi-scale white turtle broodstock. Background technique [0002] Multi-scale white turtle (Onychostoma macrolepis Bleeker), also known as multi-scale shovel jaw fish, red scale fish, etc., belongs to Cyprinidae, Cyprinidae, Onychostoma subfamily, and white turtle genus. It is distributed in Hutuo in the upper reaches of the Yangtze River, Huai River, Wei River and Hai River. He is a small and valuable economic fish, and it is called "China's five famous fish" together with Chunjiang shad, Qinghai Lake naked carp, Dali Schizothorax and exotic Chinese dace. In recent years, due to many factors such as environmental pollution, climate change, and hydraulic construction, wild shoveljaw resources have decreased sharply, and germplasm resources in some origin areas are even on the verge of extinction. Precious ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for imitating the ecological cultivation and reproduction of the multi-scale white turtle broodstock, mainly through ecological technology means to cultivate the multi-scale white turtle broodstock to the natural maturation of the gonads, and artificially extract all the eggs at one time and complete the process. During the fertilization process, avoid artificial oxytocin hormones affecting the production and service life of broodstock, solve the technical problems of lack of scientific methods and multiple small-scale spawning in existing artificial breeding methods, and achieve the purpose of obtaining high-quality seedlings in batches