文章摘要
凌去非.丁Gui胚胎发育和卵黄囊仔鱼摄食研究[J].水产学报,2003,27(1):
丁Gui胚胎发育和卵黄囊仔鱼摄食研究
The study on the embryonic development and feeding of the yolk-sac larvae of Tinca tinca
投稿时间:2014-03-20  修订日期:2014-03-20
DOI:
中文关键词: 丁Gui 胚胎发育 卵黄囊仔鱼 摄食 不可逆点
英文关键词: Tinca tinca  embryonic development  yolk-sac larvae  feeding  point of no return
基金项目:
作者单位地址
凌去非 上海水产大学农业部水产增养殖、生态生理重点开放实验室 上海水产大学农业部水产增养殖、生态生理重点开放实验室
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中文摘要:
      对丁Gui的胚胎发育进行了连续观察,并对其卵黄囊仔鱼在开口摄食之前的发育、生长以及不可逆点作了实验研究。结果表明:(1)丁Gui受精卵在水温21.5℃时,胚胎发育时间约为52h;(2)仔鱼在孵出后第7天开始摄食,初次摄食率第9天达100%,第12天降到50%,进入不可逆点;(3)仔鱼对卵黄囊的日净消耗量的最大值出现在出膜后第1天,体长最大增长率出现的在出膜后的第2天;(4)仔全出膜后第8天,卵黄囊全部吸收,同时,饥饿期仔鱼开始出现负生长。
英文摘要:
      The development of the fertilized eggs and the development and growth of yolk-sac larvae of Tinca tinca in the period of starvation were observed and the point of no return ( PNR) was also studied. The results show that : ( 1) The embryo was hatched for about 52 h before hatching out with water temperature 21. 5 e . ( 2) After hatching, the larvae started to feed on the seventh day with low initial feeding rate, the initial feeding rate reached the highest figure 100% on the ninth day , and then decreased to 50% on the twelfth day, while the larvae reached the poin-t of-no-return. ( 3) After hatching, the highest yolk-sac consuming rate happened on the f irst day, while the highest growth rate of total length of larvae occurred on the second day. ( 4) On the eighth day after hatching, the yolk sac was absorbed completely, from then the starved larvae decreased in total length.
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