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根据2 0 0 1年秋季东海区12 1个调查站位的调查资料,以变异函数为工具,分析带鱼和7种小型鱼类(黄鲫、棘头梅童鱼、鳄齿鱼、六丝钝尾虎鱼、发光鲷、七星底灯鱼和细条天竺鲷)的空间异质性及其空间关系.结果表明,带鱼的变异函数曲线与细条天竺鲷、六丝钝尾虎鱼和发光鲷的曲线极为相似,对不同距离的变异函数值进行相关分析,带鱼与上述3种小型鱼类均达到极显著相关水平(P <0 . 0 1) .黄鲫和棘头梅童鱼的变异函数表现出纯金块效应,而其它几种鱼都可拟合为球状或指数模型,并且都具有较强的空间自相关特性,其中细条天竺鲷、六丝钝尾虎鱼和发光鲷的变程也都接近或超过带鱼2 6 5km的变程,带鱼与这3种小型鱼类之间具有较强的空间追随关系,因此它们是带鱼的主要摄食对象.
Based on the survey data from 12 1 stations in the autumn of 2001 in the East China Sea, the variability function was used as a tool to analyze the distribution of octopus and seven species of small fish (yellow crucian carp, The results showed that the variogram curves of the octopus were similar to those of the common catfish, the white-bellied sea bream, the black-bellied sea bream, the blue-bellied sea bream and the blue-bellied sea bream (P <0.01) .From the correlation analysis of variance function values at different distances, the correlation coefficient between the fish and the three small-sized fish reached extremely significant correlation (P <0.01) Which shows the pure gold nugget effect. However, the other fish can be fitted with spherical or exponential model, and all have strong spatial autocorrelation characteristics. Among them, Strophaga chinensis, Both of them also approach or surpass the 2 6 5 km range of octopus, and the octopus is the main feeding object of octopus due to its strong spatial relationship with the three small-sized fishes.