The Effects Of Low Protein And Low Lipid In Diets On Sex Reversal Of Rice Field Eel, Monopterus Albus

Monopterus albus (Zuiew) which belongs to Osteichthyes, Symbranchiformes, Symbranchidae, Monopterus is one of the most economically important freshwater fishes in China. It main distributes in China, Korea, Malaysia and other countries. This paper studied on the effects of low protein and low lipid in diets on sex reversal of Monopterus albus (Zuiew), the main findings as fellows:1. The effects of low protein levels on gonad development, gonad index, the contents of serum estradiol and testosterone, sex ratio and the ration of mortality were significant. With the rising of low protein levels, gonad index increasing, serum estradiol levels increasing, decreasing testosterone levels, the ration of male and mortality. Dietary low protein levels were conducive to maintain lower serum estradiol levels, higher testosterone levels, and promote the sex reversal of Monopterus albus (Zuiew) in a certain extent.2. The effects of low lipid levels on gonad development, gonad index, the contents of serum estradiol and testosterone, sex ratio and the ration of mortality were significant. With the rising of low lipid levels, gonad index increasing, serum estradiol levels increasing, decreasing testosterone levels, the ration of male and mortality. Dietary low lipid levels were conducive to maintain lower serum estradiol levels, higher testosterone levels, and promote the sex reversal of Monopterus albus (Zuiew) in a certain extent.