鳗鲡（Anguilla japonica）胚胎发育与水温和盐度的关系

RELATIONSHIP BETWEEN EMBRYONIC DEVELOPMENT OF THE EEL(ANGUILLA JAPONICA)AND WATER TEMPERATURE AND SALINITY

实验结果表明，鳗鲡胚胎发育与水温和盐度关系密切，在一定的水温范围内，胚胎发育所需时间与水温呈负相关关系，ｙ＝２４６．７７５ｅ￣（－０．０８２ｘ）。其合适水温范围是２０－２６℃，临界水温上限３０℃，下限１６℃；胚胎发育的合适盐度范围是１５－３５‰，临界盐度上限４０－４５‰，下限５－１００‰。胚胎孵化率与盐度呈二次曲线相关关系，ｙ＝－３６．９３＋９．２３ｘ－０．１９ｘ￣２。

The result of experiment shows that embryonic development of the eel isclosely related to water temperature and salinity. There existed a negative correlation be-tween embryonic development time(Y)and water temperature(x)in a certain range ofwater temperatures:Y=246.775e￣(-0.082x). The suitable water temperature for embryonic de-velopment ranges from 20-26℃,the maximum being 30℃ and the minimum l6℃. Thesuitablesalinity for embryonic development ranges from about 15-35‰, the maximumbeing about 40-45‰ and the minimum about 5-10‰. There existed a square curve corre-lation between hatching rate of embryo(Y) and salinity(X): Y=-36.93+9.23X-0.19X￣2.