江鳕胚后发育的形态观察

Burbot(Lota lota)Morphology of Post-embryonic Development

对江鳕(Lotalota)出膜后仔鱼各个器官的发育进行了系统观察。结果表明,从形态发育来看,江鳕发育分为仔鱼期和稚鱼期。仔鱼期又分为卵黄囊期仔鱼和后期仔鱼,根据外部形态和发育特点分为11个发育期;卵黄囊期(0～31日龄)仔鱼生长发育缓慢;后期仔鱼期(32～62日龄)生长发育较快。稚鱼期主要是鳞片形成(63～67日龄),所有器官形成历时67d。

Burbot larvae after hatching,the development of various organs was carried out systematically,the results show that the morphological development from the point of view,Burbot and development into two periods：larval and juvenile period.Period is divided into yolk sac larvae of larval fish and post-larvae,based on external morphology and developmental characteristics of divided into 11 developmental stages;yolk sac period（0-31 days old）larval growth and development was slow;post-larval period（32-62 days old）rapid growth and development.Juvenile fish scales formation of mainly（63-67 days old）,all organ formation lasted 67 days.