Method for improving artificial propagation efficiency of Leptobotia elongata

Abstract

The invention relates to the technical field of artificial propagation of fishes, in particular to a method for improving artificial propagation efficiency of Leptobotia elongata. The method comprisesthe following specific steps: firstly, carefully screening parent fishes, and temporarily culturing the parent fishes in a polyvinyl chloride net cage; secondly, classifying the parent fishes, and selecting different spawning induction needle pitch time and drug metering according to different development degrees so that the protection of the parent fishes and the synchronous maturation of oocytes are facilitated, and the proportion of immature egg grains in the spawning induction egg cells is reduced from 10% to 3%; thirdly, performing spawning induction treatment to uniformly mix sperms andeggs; and finally, nursing the parent fishes. According to the method, the injury of spawning parent fishes and the death of postpartum parent fishes are reduced to the maximum extent, and limited Leptobotia elongata resources are protected; the death rate of the postpartum parent fishes in the conventional method is up to 70% to 100%, but the death rate under the technical condition is 10%.

Description

technical field [0001] The invention relates to the technical field of artificial reproduction of fish, in particular to a method for improving the efficiency of artificial reproduction of long thin loach. Background technique [0002] Long thin loach Leptobotia elongata (Bleeker) belongs to Loach family, Leptobotia genus, is the largest Loach family fish, distributed in the middle and upper reaches of the Yangtze River and its tributaries, endemic to my country, occupies an extremely important role in the entire ecosystem of its living waters Location. Long thin loach has high economic value, its high protein content, rich nutritional value, the number and proportion of amino acid species are very reasonable; at the same time, long thin loach also occupies a place in the field of ornamental fish, and was awarded in the Singapore International Ornamental Fish Competition in 1989 gold medal. Due to the sudden change in the environment, the population and distribution area of...

AI Technical Summary

Problems solved by technology

In recent years, as the country pays more and more attention to environmental protection and ecological restoration work, the multiplication and release tasks of long thin loach have also been carried out one after another. At present, long thin loach seedlings are obtained by fishing wild broodstock in rivers and rivers. Artificial breeding technology requires High, in artificial domestication and breeding, we found that the development of male and female broodstock of long thin loach is not synchronized, and the semen of male fish is difficult to obtain, and the semen volume is small and low in quality, which leads to low fertilization rate of fish eggs during artificial insemination. At the same time, long thin loach resists The stress ability is poor, and the broodstock is very easy to die during the artificial breeding process, which is not conducive to the continuous seed acquisition