Comparison of embryonic development and growth of larvae and juveniles between all-female and self-bred mandarin fish Siniperca chuatsi
GONG Wanda,SONG Wen,ZHONG Lin,LIANG Xiao,WANG Shourong,ZENG Kewei
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1.College of Fisheries,Huazhong Agricultural University,Wuhan 430070,China;2.Wuhan Academy of Agricultural Sciences,Wuhan 430072,China;3.Zhejiang Academy of Agricultural Sciences,Hangzhou 310022,China
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出版日期
2022-03-14
发布日期
2022-03-14
摘要
为比较全雌翘嘴鳜Sinipercachuatsi与自交翘嘴鳜Sinipercachuatsi胚胎发育及仔幼鱼生长速度，采用人工繁殖的方法获得全雌翘嘴鳜和自交翘嘴鳜后代的受精卵，在水温为26～28 ℃条件下孵化，对全雌翘嘴鳜和自交翘嘴鳜后代的胚胎发育进行观察与比较，并详细记录了受精卵受精、卵裂、囊胚、原肠胚、神经胚、器官形成和出膜7个连续发育阶段特征，结合胚胎发育特征进一步比较了二者在仔幼鱼阶段的生长状况。结果表明：在水温、孵化方式等外部条件相同的情况下，全雌翘嘴鳜、自交翘嘴鳜的受精卵从受精到孵化出膜所需的总时间分别为39 h 12 min和38 h 44 min，各时期的胚胎发育特征基本一致；在仔幼鱼生长阶段，21日龄后全雌翘嘴鳜与自交翘嘴鳜的生长呈显著性差异(P<0.05)；仔幼鱼全长-体质量生长结果显示，全雌翘嘴鳜的生长方程为W全雌鳜=0.016L2.971(R2=0.991)，说明在仔幼鱼阶段全雌翘嘴鳜略呈匀速生长，自交翘嘴鳜的生长方程为W自交鳜=0.020L3.008(R2=0.991)，说明在该阶段自交翘嘴鳜体质量生长快于全长生长。研究表明，全雌翘嘴鳜与自交翘嘴鳜的胚胎发育时间及其特征基本一致，但全雌翘嘴鳜仔幼鱼的生长速度显著快于自交翘嘴鳜。
Abstract
The fertilized eggs were obtained by artificial reproduction of all-female mandarin fish Sinipercachuatsi and self-bred mandarin fish,and incubated at water temperature of 26-28 ℃.The total length and body mass were measured from 5 day old postlarvae to 60 days old juveniles of all-female and self-bred mandarin fish reared in a cement tank of 2 m×2 m×1.5 m in 5-7 days interval to compare the embryonic development and growth rate of all-female and self-bred mandarin fish.The embryo development of the offsprings of all-female and self-bred mandarin fish were observed and compared,and the characteristics of seven successive development stages of the fertilized eggs were described as following:fertilization,cleavage,blastula,gastrula,neuroblast,organogenesis and hatching stage.The results showed that it took 39 h 12 min from fertilization to hatching in all-female mandarin fish and 38 h 44 min in self-bred mandarin fish at same water temperature and incubation mode,with basically the same embryonic development characteristics in all stages.There was significant differences in growth in 21 days old all-female and self-bred mandarin fish afterwards (P<0.05).The growth equation was expressed as W=0.016L2.971(R2=0.991)in all-female mandarin fish,indicating that the growth rate was generally uniform in the larval and juvenile stages.The growth equation was described as W=0.020L3.008(R2=0.991)in self-bred mandarin fish,indicating that the growth of body mass was better than that in total length at this stage.The findings indicated that the all-female and self-bred mandarin fish had primarily the same embryonic development time and characteristics,and that the all-female mandarin fish had better growth rate than the self-bred mandarin fish did.
GONG Wanda, SONG Wen, ZHONG Lin, LIANG Xiao, WANG Shourong, ZENG Kewei.
Comparison of embryonic development and growth of larvae and juveniles between all-female and self-bred mandarin fish Siniperca chuatsi[J]. Journal of Dalian Fisheries University, 2022, 37(1): 26-33 https://doi.org/10.16535/j.cnki.dlhyxb.2021-092
中图分类号：
S 965.199
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