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.

 
  • 利用1985和1986年秋季底拖網(wǎng)資源調查數據,分析了晝夜平均漁獲量的差異,采用Bray-Curtis系數測量其不相似性。
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