| 底拖网资源调查的昼夜误差分析 |
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| 引用本文： | 金显仕.底拖网资源调查的昼夜误差分析[J].海洋水产研究,1997,18(1):42-46. |
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| 作者姓名： | 金显仕 |
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| 作者单位： | 中国水产科学研究院黄海水产研究所 青岛266071 |
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| 摘 要： | 利用１９８５和１９８６年秋季底拖网资源调查数据，分析了昼夜平均渔获量的差异，采用Ｂｒａｙ－Ｃｕｒｔｉｓ系数测量其不相似性。结果表明，除底层鱼类外，总平均和中上层鱼类平均渔获得昼液差显著，白天平均渔获量远高于晚上，特别是中上层鱼类相差１０余倍，主要种类的差异亦较大。
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| 关 键 词： | 底拖网 调查 昼夜 误差分析 |
ANALYSIS OF B0TTOM TRAWL SURVEY BETWEEN DAY AND NIGHT |
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| Jin Xianshi.ANALYSIS OF B0TTOM TRAWL SURVEY BETWEEN DAY AND NIGHT[J].Marine Fisheries Research,1997,18(1):42-46. |
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| Authors: | Jin Xianshi |
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| Abstract: | An analysis of the difference between day and night average catch wasmade from bottom trawl surveys in autumn 1985 and in 1986. The Bray-Curtis index wasused to measure the dissAnilarity between day and night average catch. The results indicatedsignificant difference between day and night average catch, and in total, pelagic and mainspecies. lt concludes that bottom trawl survey for abundance index can be used for bottomfish during day and night,but not for pelagic fish. A better strategy is to combine bottomtrawl with acoustic surveys. |
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| Keywords: | Bottom trawl survey Day and night Dissimilarity |
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