大银鱼胚胎发育的初步观察

The Tentative Abservation of Embryogeny of the Big Salangid

对人工授精的大银鱼卵的胚胎发育的观察表明。在水温７±１℃条件下，大银鱼胚胎发育历时３７天６小时。鱼孵出６—８天后印黄囊消失，进入外源营养阶段。非受精卵发育到原肠期即死亡，原肠晚期是计算受精率的可靠时间。

The observation of embryogeny of the eggs of Big Salangid that has been artificial insernineted shows that:vnder the condition of water temperature 7 ±1℃, the embryto developmentof Big salangid wants the time of 37 days and 6 hours;6-8 days after the hatching, the Bag ofYolk had been disappeared and the fish entered the stage of exogenous nutrition;During the phaseof Archenteron, the non-zygote would be died.The late stage of Archenteron was the reliabletime of counting the fertility rate.