The Japanese eel is one of the most important species of the aquaculture
industry of Asia. Glass eels for aquaculture is completely
caught from wild. Recently, glass-eel catches not meeting the demand of
aquaculture farms. In 2011 , for example: Taiwan's annual production of
only 2244 tonnes of eel, the output value of about 2.5 billion.This study
try to explore the suitable methods for
induced spawning of the japanese eel (Anguilla japonica). Artificially
induced sexual maturity of the eel used homogenized salmon pituitary
mixed gonadotropin injection and mature female eels induced spawning used
DHP injected. The results showed , we can decide the degree of gonadal
development and the appropriate time for induced spawning of the eel by
observing the color change of pectoral fin and urogenital opening ,
respectively.