摘要
西伯利亚鲟是重要的经济鱼类和进化发育研究材料。对全人工繁殖西伯利亚鲟的早期胚胎发育进行了观察和研究,成熟西伯利亚鲟卵呈球形、黑色、不透明、平均卵径为2.9mm;在水温15.5～18.0℃下,受精卵历时133h开始孵出,所需总积温为2173～2369℃·h;根据对西伯利亚鲟胚胎发育外部形态及典型特征的观察与分析,将其胚胎发育过程划分为合子、卵裂、囊胚、原肠胚、神经胚、器官形成和出膜7个阶段,共34个发育时期,并对胚胎发育各期的主要形态特征进行描述。
As one of the oldest sub-cold water fishies,Acipenser baeri is valuable in terms of fish research and economy. In order to provide information that may help with the improvement of artificial propagation and evolutional development study,the morphological observation during embryonic development of A. baeri were conducted under rearing conditions. Under 15. 5 - 18. 0 ℃,it took 133 h from fertilization to hatching with the average cumulation temperature of 2 173 - 2 369 ℃·h. The embryonic development process could be divided into 7 stages,including fertilized egg stage,cell division stage,blastula stage,gastrula stage,neurula stage,organ formation stage and hatching stage,and contained thirty-four developing phases,whose characteristics were described. The cleavage pattern is radial holoblastic cleavage,and is similar to that of amphibian,but not obviously different from many other fishes; however,the disc cleavage is something like that of bony fish.
出处
《水产学报》
CAS
CSCD
北大核心
2010年第5期777-785,共9页
Journal of Fisheries of China
基金
上海市科学技术委员会2008年科研计划资助项目(073205109)
上海市优秀青年科研专项基金
上海市重点学科建设项目(S30701)
关键词
西伯利亚鲟
胚胎发育
积温
Acipenser baeri
embryonic development
accumulative temperature
