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Evaluation of Reproductive Capacity in Pond-Reared Penaeus monodon after Unilateral Eyestalk Ablation

Evaluation of Reproductive Capacity in Pond-Reared Penaeus monodon after Unilateral Eyestalk Ablation

Weigeng Wen1,2,3, Xu Chen1,2,3, Wang Zhao1,2,3, Qibin Yang1,2,3, Jian G. Qin4 and Zhenhua Ma1,2,3,*

1Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya 572018, China
2Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture, Guangzhou 510300, China
3Sanya Tropical Fisheries Research Institute, Sanya 572018, China
4College of Sciences and Engineering, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia
 
Weigeng Wen and Xu Chen have contributed equally to this study.

*     Corresponding author: zhenhua.ma@hotmail.com

ABSTRACT

This study investigated the reproductive capacity of pond-reared female Penaeus monodon after unilateral eyestalk ablation. A total of 240 females (57.0-143.3g) were used as broodstocks in a continuous three-year breeding experiment. After unilateral eyestalk ablation, the relationships of egg and nauplii at the first spawning event and female bodyweight were evaluated. At each spawning, a female could produce 120000-1250000 eggs which hatched into 80,000-950,000 nauplii. The egg hatching rate at each spawning varied from 27.4% to 86.3% without particular patterns of correlation with female body weight. The fecundity of pond-reared female P. monodon varied from 2 100 to 9 400 eggs per gram of bodyweight, and females with medium size of 85-120 g showed greater fecundity (around 9000 eggs/g) in comparison with smaller and larger counterparts. This study indicates that reproductive capacity of pond-reared female P. monodon is significantly related to bodyweight with a desirable size of 85-120 g as female broodstocks.
 

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Pakistan Journal of Zoology

August

Vol. 52, Iss. 4, Pages 1225-1630

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