Based on the statistics of Sagitta crassa investigated in Haizhou bay from Auguest 2006 to November 2007, the characteristics of spatial distribution and spatial / temporal changes of abundance in Sagitta crassa were analyzed with the aggregation intensity indices, Iwao's and Taylor's model. The results showed that; Sagitta crassa exhibited aggregated distribution in the investigated waters; significant differences of the spatial / temporal changes of average abundance were observed in the Sagitta crassa. From the spatial aspect, average abundance in central and northern waters was higher than that in southern waters. From the time aspect, average abundance of Sagitta crassa in spring and winter was higher than that in summer and autumn obviously.%根据海洲湾2006年8月-2007年11月的强壮箭虫(Sagitta crassa)调查数据,采用聚集强度指标、Iwao和Taylor模型分析了强壮箭虫的空间分布特征和丰度的时空变化.结果表明:强壮箭虫在调查海域呈聚集分布；强壮箭虫平均丰度的时空变化差异显著,空间上,中、北部海域的平均丰度高于南部海域,时间上,强壮箭虫春、冬季节的平均丰度明显高于夏、秋季节.
展开▼
