Method for obviously improving survival rate of exopalaemon carinicauda in artificial breeding process

Abstract

The invention relates to a method for obviously improving the survival rate of exopalaemon carinicauda in the artificial breeding process, in particular to a method for carrying out larva separation and collection by utilizing phototaxis of larvae. The method comprises the following steps of dividing different functional regions in a spawning pool; regulating illumination in different functional regions; and installing a lifting adjustable larva collection net. In the step of dividing the functional regions, a large-aperture screen is utilized to isolate and divide the spawning pool into a parent shrimp action region and a larva collection region; and illumination regulation comprises the steps of covering the parent shrimp action region with a sunshade net and carrying out lure in the larva collection region by a fluorescent lamp. The method has the advantages that division of different functional regions and illumination regulation enable larvae and parent shrimps to be spatially and effectively separated and reduces the predation rate of the parent shrimps for the larvae, so that post-larvae yield is greatly improved; meanwhile, embryo abscission and death of the parent shrimps, which are caused by frequent sorting of the parent shrimps, are also avoided and the survival rate in the breeding process is improved; and the lifting adjustable larva collection net can be used for collecting larvae in due time according to the hatching condition of larvae, so that labor intensity is reduced and the practical value on production is improved.

Description

technical field [0001] The invention relates to a method for greatly increasing the emergence of white prawns artificially raised, in particular to a method for separating and collecting larvae by utilizing the phototaxis of larvae, and belongs to the technical field of aquaculture. Using this technology can greatly reduce the predation rate of broodstock on larvae in the process of artificial breeding of white prawns, increase the survival rate of artificial breeding of white prawns, and reduce labor intensity. 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 for breeding. It is a ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems such as high predation rate of broodstock on larvae, low emergence of each broodstock, and heavy workload of larvae collection in the process of artificial breeding of white prawns, the present invention develops a method for separating broodstock and larvae by using larvae phototaxis and timely The method of collecting larvae prepares the basis for large-scale artificial breeding of white shrimp

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