【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。更多还原

【Abstract】 Characteristics of embryo and Z₁ 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）.Z₁ size,total lipid,CMI and PNR₅₀ of the two times are significantly different（P<0.05）.It indicates that the quality of Z₁ in 2^nd brood is not up to that of the first.更多还原