A method for improving artificial propagation efficiency of long thin loach

Abstract

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. The specific steps are as follows. Firstly, the broodstock are carefully screened and temporarily kept in polyvinyl chloride cages, and then the broodstock are classified. According to different developmental levels, different oxytocin needle intervals and drug dosages are selected, which is beneficial to the protection of the broodstock. With the synchronous maturation of oocytes, the proportion of immature eggs in the induced oocytes decreases from 10% to 3%, and then the induced oocytes are treated to mix the sperm and eggs evenly, and finally the broodstock is nursed to minimize the number of spawning broodstock. The injury and the death of postpartum broodstock have protected the limited long thin loach resources. The mortality rate of postpartum broodstock in traditional methods is as high as 70% to 100%, and the mortality rate is 10% under the technical conditions.

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