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李为, 蔡杏伟, 郭传波, 张堂林, 刘家寿, 李钟杰. 浅水湖泊人工繁育鳜放养规格对其成活、生长和产量的影响[J]. 水生生物学报, 2018, 42(6): 1163-1168. DOI: 10.7541/2018.142
引用本文: 李为, 蔡杏伟, 郭传波, 张堂林, 刘家寿, 李钟杰. 浅水湖泊人工繁育鳜放养规格对其成活、生长和产量的影响[J]. 水生生物学报, 2018, 42(6): 1163-1168. DOI: 10.7541/2018.142
LI Wei, CAI Xing-Wei, GUO Chuan-Bo, ZHANG Tang-Lin, LIU Jia-Shou, LI Zhong-Jie. EFFECTS OF RELEASE SIZE ON SURVIVAL, GROWTH AND YIELD OF HATCHERY-REARED MANDARIN FISH STOCKED IN A SHALLOW YANGTZE LAKE[J]. ACTA HYDROBIOLOGICA SINICA, 2018, 42(6): 1163-1168. DOI: 10.7541/2018.142
Citation: LI Wei, CAI Xing-Wei, GUO Chuan-Bo, ZHANG Tang-Lin, LIU Jia-Shou, LI Zhong-Jie. EFFECTS OF RELEASE SIZE ON SURVIVAL, GROWTH AND YIELD OF HATCHERY-REARED MANDARIN FISH STOCKED IN A SHALLOW YANGTZE LAKE[J]. ACTA HYDROBIOLOGICA SINICA, 2018, 42(6): 1163-1168. DOI: 10.7541/2018.142

浅水湖泊人工繁育鳜放养规格对其成活、生长和产量的影响

EFFECTS OF RELEASE SIZE ON SURVIVAL, GROWTH AND YIELD OF HATCHERY-REARED MANDARIN FISH STOCKED IN A SHALLOW YANGTZE LAKE

  • 摘要: 文章采用标志放流回捕方法评估了人工繁育鳜放流规格对其成活、生长和产量的影响。2012年5—6月选取3种不同大小规格的人工繁育鳜鱼苗各800尾, 中等规格鳜苗种和大规格鳜苗种分别采用剪尾鳍和编码金属标标记后放入试验湖泊小赛湖, 2012年12月试验湖泊逐渐降低水位, 回捕收集放流鳜并鉴定身份。结果显示3种规格放流鳜的总成活率为40.5%, 其中大规格放流鳜的成活率为63%, 明显高于中规格放流鳜(39.1%)和小规格放流鳜(19.5%)。放流鳜的终末体长和体重均随放流规格的增加而增加, 且3种规格放流鳜的终末体长和体重均呈现显著差异。放流鳜的产量和净收益在大规格处理组最大, 在小规格处理组最小。结果表明鳜放流规格对鳜放流成功与否有重要影响, 建议长江中游湖泊鳜的最佳放流规格应不小于50 mm。

     

    Abstract: A tag-release-recapture study was conducted to evaluate effects of size at release on survival, growth and yield of hatchery-reared mandarin fish Siniperca chautsi fingerlings stocked in a shallow Yangtze lake. In May and June 2012, a total of 2400 juvenile mandarin fish were graded into three size groups, identified with coded wire tags and tail fin clipping, and released into Xiaosai Lake. Mandarin fish were collected after the lake drained in December 2012. Overall, a total of 973 mandarin fish individuals were captured, with an average survival rate of 40.5%. Survival rate of large sized group (63%) is more than three times higher than that of small sized group (19.5%) and 1.5 times higher than that of middle sized group (39.1%). The mean final length and weight of mandarin fish increased with the increase of release size and showed significant difference among groups. Yield was significantly affected by release size, which was the highest in large sized group and the lowest in small sized group. The net income of stocked mandarin fish increased with the increase of fish size at release. Our results indicated that mandarin fish size at release can have a major impact on success of hatchery releases, and it is suggested that the optimum release size of mandarin fish should not be less than 50 mm in Xiaosai Lake.

     

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