【摘要】 基于2016年8月(夏季)、11月(秋季)、2017年3月(冬季)、5月(春季)浙江南部近海的鱼类调查数据,利用生态位宽度、生态位重叠、聚类分析、方差比率法、卡方检验、联结系数以及种对共同出现百分率对主要鱼类种间关系进行研究。结果表明:(1)调查共采集鱼类169种,主要鱼类共有26种;(2)在空间维度上,日本鲭(Scomber japonicus)生态位宽度最大(2.83),青鳞小沙丁(Sardinella zunasi)和芝芜棱鳀(Thryssa chefuensis)生态位重叠值最大(0.97);在时间维度上,龙头鱼(Harpadon nehereus)生态位宽度最大(1.34),6组种对时间生态位重叠值等于1.00;在时空维度上,龙头鱼生态位宽度最大(3.50),青鳞小沙丁与芝芜棱鳀时空生态位重叠值最大(0.97);(3)方差比率法分析表明,方差比率偏离显著,主要鱼类总体正联结显著,其中170组种对间联结性达到显著水平(χ2≥3.841),联结系数和种对共同出现频率结果表明种间联结性趋于正联结。更多还原

【Abstract】 Based on the fish survey data of the offshore waters of southern Zhejiang in August 2016 (summer),November 2016 (Autumn),March 2017 (winter) and May 2017 (spring),the relationship between dominant fish species is determined by niche breadth,niche overlap,cluster analysis,variance ratio (VR) method,chi-square test,association coefficient (AC) and species pair common percentage (PC).The results show that:(1) 169 species of fish are collected,including 26 major species;(2) in the spatial dimension,the niche breadth of Scomber japonicus is the largest (2.83);the niche overlap between Sardinella zunasi and Thryssa chefuensis is the largest (0.97);in the temporal dimension,the niche breadth of Harpadon nehereus is the largest (1.34);the niche overlap of six groups is equal to 1.00;in the spatial and temporal dimension,the niche breadth of Harpadon nehereus is the largest (3.08);the niche overlap between Sardinella zunasi and Thryssa chefuensis is the largest (0.97);(3) the variance ratio analysis showed that the VR deviation is significant,and the overall positive association of the major fish is significant,among which 170 groups of species pair association reached a significant level (χ~2≥3.841).The results of the AC and the PC showed that the interspecific connection tended to be positive.更多还原