Method for synchronous line establishment of small-population parents in artificial breeding of exopalaemon carinicauda

Abstract

The invention discloses a method for synchronous line establishment of small-population parents in artificial breeding of exopalaemon carinicauda. In non-high-breeding season at relatively low water temperature, water temperature is regulated and controlled in three development stages (parent prawn gonad development stage, zygote embryo development stage and larval development stage) by virtue of a temperature control method, so that families established by small-population parents in different gonad development stages can develop into a post-larval stage at the same time as much as possible, and the synchronous line establishment of the small-population parents is finally achieved. By respectively setting temperature gradients according to the suitable temperature ranges of the exopalaemon carinicauda in different development stages, the method disclosed by the invention is conducive to the shortening of development time difference of various parent progenies, and capable of achieving the synchronous line establishment and multi-generation breeding per year of the small-population parents in the artificial breeding of the exopalaemon carinicauda.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for synchronously establishing lines of small populations of white shrimp artificially selected and bred. Background technique [0002] The white prawn is a bottom-dwelling shrimp in the temperate tropical sea area, with the highest yield in the Yellow Sea and the Bohai Sea. It is one of the three unique economic shrimps in China, and its output is second only to the Chinese prawn and the Chinese hairy shrimp. White prawns have strong environmental adaptability, fast growth, good meat quality, high economic value, and considerable economic benefits from farming. It is a potential shrimp species for breeding. At present, its farming output has reached one-third of the total output of polyculture ponds in the eastern coastal areas of my country. one or so. White prawns are resistant to low temperature and suitable for a wide range of salt, and can be cultured in freshw...

AI Technical Summary

Problems solved by technology

[0003] The generation cycle of most aquaculture species is calculated in units of years, while the traditional family establishment cycle is usually about 20-30 days, and the line establishment cycle accounts for a relatively small proportion of the generation cycle (less than 8%). It has little impact on the comparison and selection of traits between families, but the generation cycle of the white shrimp is short, only 3-4 months, and the traditional method of establishing a line is too long (accounting for more than 20%), which is not conducive to the comparison of traits among families and select

However, previous studies mainly focused on the establishment of shrimp families and breeding strategies, and there is no report on how to shorten the breeding cycle.

At the same time, in order to speed up the breeding process, it is feasible and necessary to use the short generation cycle of the white shrimp to achieve multi-generational reproduction in a controlled environment, but in the non-breeding season when the water temperature is low, the gonad development of the parents The synchronization is poor, and the establishment cycle will be longer