Evaluation of culture performance of wild megalopae and offspring of wild broodstock of Chinese mitten crab Eriocheir sinensis during juvenile culture stage
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Shanghai Ocean University,Shanghai Ocean University,Zhejiang Aoling Aquacultrue seed Industry Co., Ltd, Zhejiang changxing,Shanghai Ocean University,Shanghai Ocean University,Shanghai Ocean University

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S968.25

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    Abstract:

    The research was aimed to compare the growth performance of wild megalopae (G0) and the offspring of wild broodstock (G1) of E. sinensis during the juvenile culture stage based on a culture experiment. The comparison and differences of body mass, survival rate, precocious rate, and the final yield are shown as follows:(1) No matter for females or males, the average mass of wild G0 was consistently lower than that of wild G1 individuals throughout the culture period with significant differences at 120-day and 150-day old of females (P<0.05); (2) The weight gain rate (WGR) and specific growth rage (SGR) of both populations were on the decline and they were generally higher in G1 individuals all through the culture stage except for the 150-180 and 180-210 days old. (3) The survival, yield and precocious rate of wild G0 were relatively higher than those of wild G1 individuals; (4) As for the size distribution of juvenile crabs, the body mass of wild G1 were mainly concentrated on the ranges of 0-4.00 g (36.76%), but the wild G1 were mainly concentrated on 4.00-5.99 g (26.93%) and 6.00-7.99 g (25.43%), the percentage large-size juveniles (≥ 12 g) were all low for both populations, only 8.46% and 7.60%. Wild megalopae were superior to the offspring of wild E. sinensis on survival rate and yield, and difference in nutritional value or immunity of both populations still needs further research.Through the culture experiment, the breeding effects of wild megalopae from two different sources in the juvenile culture stage were compared, which provided a practical basis for rational breeding and utilization of wild megalopae.

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王海宁,姜晓东,邓登,吴旭干,王少兵,成永旭.野生和野生亲本子一代大眼幼体在扣蟹阶段养殖性能的比较[J].上海海洋大学学报,2019,28(1):67-74.
WANG Haining, JIANG Xiaodong, DENG Deng, WU Xugan, WANG Shaobing, CHENG Yongxu. Evaluation of culture performance of wild megalopae and offspring of wild broodstock of Chinese mitten crab Eriocheir sinensis during juvenile culture stage[J]. Journal of Shanghai Ocean University,2019,28(1):67-74.

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History
  • Received:August 09,2018
  • Revised:October 24,2018
  • Adopted:November 28,2018
  • Online: January 21,2019
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