闽南-台湾浅滩渔场二长棘鲷群体集群行为宏观量化与分析

MACRO-LEVEL QUANTIFICATION AND ANALYSIS OF SCHOOLING BEHAVIOR OF PARARGYROPS EDITA TANAKA IN MINNAN-TAIWAN BANK FISHING GROUND

根据1998年7月到2000年6月闽南-台湾浅滩渔场开展二长棘鲷资源的专项调查资料,计算出闽南-台湾浅滩渔场二长棘鲷的各月E值,定量分析其集群行为变化规律。结果表明:闽南-台湾浅滩二长棘鲷全年月平均E为7.4409×108J,生殖期间12月到翌年3月,其月平均E 2.4949×108J,是全年月平均E的0.34倍,鱼群集中;4—5月,幼鱼大量出现,月平均E为4.556×108J,是全年月平均E的0.61倍,鱼群相对集中;主要索饵季节6—8月,月平均E为1.3448×109J,是全年月平均E的1.81倍,鱼群分散;9—11月,E分别为1.435×109、9.7409×108、5.769×108J,分别是全年月平均E的1.93、1.31、0.78倍,鱼群为适应水温和寻找产卵场,在外移过程中逐渐集中。可见,闽南-台湾浅滩二长棘鲷的生殖群体集群性最强,其次是幼鱼群体、以适应水温和寻找产卵场为目的的群体,而索饵群体分散。

According special investigation material of Parargyrops edita population in Minnan-Taiwan bank fishing ground from July 1998 to June 2000,the E value in each month of P.edita population was calculated,which used to quantificationally analyse the variation rule of schooling behavior.The results showed that the annual monthly average E of P.edita population in Minnan-Taiwan bank fishing ground is 7.4409×108J,in the reproduction period which from December to March of the next year,the average monthly E is 2.4949×108J,which was 0.34 times of the annual average,that meant the fish concentrated;young appeared in large numbers from April to May,and the average monthly E was 4.556×108J,which was 0.61 times of the annual average,the fish relatively concentrated;in feeding migratory months from June to August,the average monthly E was 1.3448×109J,which was 1.81 times of the annual average,the fish dispersed;E was 1.435×109,9.7409×108,5.769×108J from September to November respectively,which was 1.93,1.31 and 0.78 times of the annual average E;in the transfer process,the fish population gradually concentrated in order to adapt to water temperature and look for spawning grounds.So schooling behavior of the reproductive population of P.edita in Minnan-Taiwan bank fishing ground was the strongest,followed by a young group and the group which need adapt to the water temperature and search for spawning grounds,while the feeding group disperse.