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第一次及第二次抱卵的中华绒螯蟹胚胎和Z1幼体质量的比较
引用本文:南天佐,成永旭,吴旭干,王金庆,王丽娟,刘必林.第一次及第二次抱卵的中华绒螯蟹胚胎和Z1幼体质量的比较[J].上海水产大学学报,2006,15(1):41-46.
作者姓名:南天佐  成永旭  吴旭干  王金庆  王丽娟  刘必林
作者单位:上海水产大学农业部水产种质资源与养殖生态重点开放实验室 上海200090
基金项目:中国科学院资助项目;上海市教委"曙光计划";上海市重点学科建设项目
摘    要:以中华绒螯蟹(Eriocheir sinensis)胚胎的湿重、胚胎直径、含水率、总脂和Z1幼体的体长、累计死亡指数(CMI)、50%死亡时间(PNR50)为评价指标,比较了第一次及第二次抱卵的胚胎和Z1幼体的性能。结果表明,两次抱卵的胚胎直径,湿重、干重具有显著性差异(P<0.05)。两次抱卵的胚胎含水率接近。在发育初期胚胎总脂的含量差异不大(P>0.05),在孵化前第二次抱卵胚胎的总脂含量低于第一次抱卵胚胎(P<0.05)。两次初孵Z1幼体的体长、总脂、CMI、PNR50差异显著(P<0.05)。综合各指标,第二次抱卵孵化所得的Z1幼体的质量不如第一次抱卵。

关 键 词:中华绒螯蟹  胚胎  Z1幼体
文章编号:1004-7271(2006)01-0041-06
收稿时间:2005-04-20
修稿时间:2005年4月20日

Comparison on the first and second berried crab on embryo and larval quality (Z1) of Eriocheir sinensis
NAN Tian-zuo,CHENG Yong-xu,WU Xu-gan,WANG Jin-qin,WANG Li-juan,LIU Bi-lin.Comparison on the first and second berried crab on embryo and larval quality (Z1) of Eriocheir sinensis[J].Journal of Shanghai Fisheries University,2006,15(1):41-46.
Authors:NAN Tian-zuo  CHENG Yong-xu  WU Xu-gan  WANG Jin-qin  WANG Li-juan  LIU Bi-lin
Institution:Key Laboratory of Aquatic Genetic Resources and Aquaculturat Ecosystem Certificated by the Ministry of Agriculture, Shanghai Fisheries University, Shanghai 200090, China
Abstract:Characteristics of embryo and Z_1 of Eriocheir sinensis females from 1~(st) and 2~(nd) brood have been investigated.Egg size,wet weight and dry material weight of every embryo in the 1~(st) brood are significantly higher than those of the 2~(nd)(P<0.05).There are no significant difference in water content between the two embryos(P>0.05).The water content of the two embryos increased as the embryos developed(P<0.05).Total lipid decreased gradually as the embryo developed,but only during the 2~(nd) time,it decreases obviously(P<0.05).Z_1 size,total lipid,CMI and PNR_(50) of the two times are significantly different(P<0.05).It indicates that the quality of Z_1 in 2~(nd) brood is not up to that of the first.
Keywords:Eriocheir sinensis  embryo  Z_1
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