杂交东方鲀的胚胎和仔鱼的发育

The Developmet of Embryo and Fry of Hybrid Puffer(Fugu Ocellatus♀×Fugu Obscurus♂)

描述了杂交东方鲀（弓斑东方鲀暗纹东方鲀）胚胎和仔鱼各发育阶段的形态特征．杂交东方鲀受精卵沉性，圆球形．卵膜较厚，半透明．卵黄均匀，淡棕黄色．卵径１．４３～１．５６ｍｍ．油球３１０～４２０个，球径２６～７８μｍ．在水温１８．６～２１．５℃条件下，从受精至孵化出膜需１４４ｈ５０ｍｉｎ．初孵仔鱼的卵黄囊消失需１０ｄ左右．上述生物学资料，为进二步开展杂交河豚鱼人工育苗、改良和开发新品种，奠定了必要的繁殖生物学基础．

The present paper describes the morphological characters on different development phases of embryo and fry of hybrid puffer(Fugu ocellatus ×Fugu obscurus). The fertilized egg of hybrid puffer is sinkable, spherical in shape and light brown and yellow in colour. The membrane of egg is light thick and translucent. The diameter of egg is around 1. 43-1. 56mm. The egg has about 310～ 420 oil globules. The diameter of oil-ball is about 26～78urn. Under the temperature of 18. 6～21.5℃,the egg will being hatched after 144 hours and 50 minutes since fertilized. It takes about 10 days for yolk sacs disappeared of newly hatched fry. These biology data lay a necessary propagation biology foudation, for developing artifical rearing fry and improving new breed of puffer further.