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Comparison of ovarian maturation and spawning after unilateral eyestalk ablation of wild-caught and pond-reared Penaeus monodon

文献类型： 外文期刊

作者： Wen, Weigeng 1 ; Yang, Qibin 1 ; Ma, Zhenhua 1 ; Jiang, Shigui 1 ; Qiu, Lihua 1 ; Huang, Jianhua 1 ; Zhou, Falin 1 ; Qin, 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China

2.Minist Agr, Key Lab South China Sea Fishery Resources Exploit, Guangzhou 510300, Guangdong, Peoples R China

3.Flinders Univ S Australia, Sch Biol Sci, Adelaide, SA 5001, Australia

关键词： ovary maturation;body weight;wild-caught shrimp;pond-reared shrimp;eyestalk ablation;aquaculture

期刊名称：SPANISH JOURNAL OF AGRICULTURAL RESEARCH （ 2020影响因子：1.238； 五年影响因子：1.731 ）

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收录情况： SCI

摘要： The present study compares the efficiency of ovarian maturation and spawning success between wild-caught and pond-reared Penaeus monodon females after unilateral eyestalk ablation. The earliest spawning time after eyestalk ablation was 5.9 days in wild-caught females, which is significantly shorter than the spawning time in pond-reared females (10.5 days). Both wild-caught and pond-reared females repeatedly spawned after eyestalk ablation. On average, each wild-caught female spawned 2.94 times while each pond-reared female spawned only 1.09 times. The spawning induction rate, egg hatching rate, and the number of eggs per spawning were significantly greater in wild-caught females than in pond-reared females. However, the egg size was not significantly different between wild-caught and pond-reared females. Four shrimp sizes (60, 80, 100 and 120 (+/- 1.0) g) were tested in this study and body weight significantly affected ovarian induction in pond-reared females but not in wild-caught females. Within the same body-weight class, the egg number per spawn in wild-caught females was significantly greater than that in pond-reared females. The egg production per spawn of the pond-reared females in the 120-g size group was two times higher than that in the pond-reared females in the 80-g size group. In conclusion, the fecundity of wild-caught P. monodon females is significantly higher than that of pond-reared P. monodon females. In breeding pond-reared P monodon, the recommended minimum body weight of females is over 80 g, and the desirable body weight is over 100 g.

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