闽东北海域中华管鞭虾种群聚集特性

以负二项参数、平均拥挤度和聚块指数为种群分布格局强度指标,分析了闽东北海域中华管鞭虾(Solenocera crassicornis)种群聚集特性,探讨了种群聚集特性的驱动因子。结果表明,中华管鞭虾种群聚集强度较强,个体平均拥挤度较高,种群主要集中于少数团聚的斑块,不同季节种群聚集特性差异显著,春季,种群聚集强度较强,个体平均拥挤度最低,种群主要由单一团聚的斑块组成;夏季,种群聚集强度较弱,个体平均拥挤度高,种群主要由4个斑块组成;秋季,种群聚集强度最弱,个体平均拥挤度较低,种群主要由7个斑块组成;冬季,种群聚集强度最强,个体平均拥挤度最高,种群主要由单一团聚的大斑块组成。随着个体生长速度的增大,种群呈现扩散的趋势,饵料浮游动物生物量和底层水温是影响种群聚集强度的主要因子。

Aggregations of the Solenocera crassicornis in the sea area northeast of Fujian

The current study analyzed the aggregation of Solenocera crassicornis in the sea area northeast of Fujian based on the pattern intensity index of the negative binomial parameter, mean crowding, and poly block index and discussed the driving factors of population aggregation. Results revealed that the aggregation intensity and mean crowding were high and the population was mainly concentrated in small reunion plaques with a season-specific pattern. In spring, the population primarily consisted of a single patch with stronger aggregation intensity and the lowest mean crowding than that in the other seasons. In summer, the population primarily consisted of four patches with weaker aggregation intensity and higher mean crowding than those in the other seasons. In the fall, the population primarily consisted of seven patches with the weakest aggregation intensity and higher mean crowding than that in the other seasons. In winter, the population primarily consisted of a single large patch with the strongest aggregation intensity and the highest mean crowding. The population spread with increased individual growth rates. Zooplankton biomass (diet) and bottom water temperature were the major factors affecting aggregation intensity of S. Crassicornis.