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运用地统计学原理和方法,分析2002年东海区小黄鱼(Larimichthyspolyactis)分布的空间变异特征,并用Kriging法对不同时期的小黄鱼分布进行空间插值成图。结果显示,不同时期东海区小黄鱼种群的变异函数均可拟合为球状模型,秋季的空间变异程度最高,冬季随机性变异占总变异的比例最低,具有最好的空间自相关特性,而夏季的空间自相关范围最小。小黄鱼空间结构的季节变化与其繁殖、索饵、洄游等生态习性和人为捕捞影响密切相关。
Based on the principles and methods of geostatistics, the spatial variability of the distribution of Larimichthys polygamis in the East China Sea in 2002 was analyzed. Kriging method was also used to map the distribution of the small yellow croaker in different periods. The results showed that the variance function of the population of small yellow croaker in the East China Sea could be fitted to a spherical model in different periods, with the highest degree of spatial variability in autumn, the lowest proportion of random variation in winter, and the best spatial autocorrelation in summer The smallest range of spatial autocorrelation. Seasonal changes in the spatial structure of small yellow croaker are closely related to the ecological habits such as breeding, feeding and migration as well as the impact of artificial fishing.