根据2016年秋季(10月)和2017年春季(4月)台州南部近岸海域的渔业资源调查资料，将2次调查中分别出现的优势种及重要种定义为主要鱼类，并采用相对重要性指数、生态位测定、方差比率、卡方检验、Pearson相关检验和Spearman秩相关检验等方法分析主要鱼类间的生态位和种间关系。结果显示，秋季主要鱼类8种，春季11种，2季共有主要鱼类5种。秋季主要鱼类的生态位宽度值与生态位重叠值总体上略高于春季，秋季广生态位种(B_i≥2.40)、中生态位种(1.60≤B_i<2.40)和窄生态位种(B_i<1.60)依次有4种、3种和1种，春季则依次有4种、5种和2种；秋季生态位重叠显著(O_ik≥0.6)的种对数占总种对数的32.14%，春季则仅占12.73%。秋季，总体联结性分析结果显示主要鱼类间总体上呈显著负关联，卡方检验、Pearson相关检验和Spearman秩相关检验显示群落中正负关联比依次为1.50、1.33和2.11，其检验显著率依次约为0%、17.86%和10.71%。春季，总体联结性分析结果结果显示主要鱼类间总体上呈不显著负关联，卡方检验、Pearson相关检验和Spearman秩相关检验显示群落中正负关联比依次为0.93、0.96和1.00，其检验显著率依次约为9.09%、18.18%和21.82%。

Based on the data from fishery resources survey carried out in southern coastal waters in Taizhou in October 2016 (autumn) and April 2017 (spring), this study defined the dominant species and main species that appeared in the two surveys as the dominant fish, and analyzed the niche and interspecific associations of dominant fish by the methods of index of relative importance, niche breadth, niche overlap, the variance ratio, Chi-square test, Pearson correlation test and Spearman rank correlation test. The results showed that there were 8 and 11 dominant fish species in autumn and spring respectively, and 5 common dominant fish species were in these two seasons. The index of niche breadth and overlap of dominant fish in autumn were slightly higher than those in spring. There were 4 wild niche species, 3 middle niche species and 1 narrow niche species in autumn, while 4 wild niche species, 5 middle niche species and 2 narrow niche species were in spring. The number of pairs with significant niche overlap in autumn accounted for 32.14% of the total pairs, while only 12.73% in spring. In autumn, overall interspecific associations indicated that significantly negative association existed among dominant fish species. Chi-square test, Pearson correlation test and Spearman rank correlation test showed that the positive and negative correlation ratios in the community were 1.50, 1.33 and 2.11 respectively, and the test significant rates were about 0%, 17.86% and 10.71% respectively. In spring, overall interspecific associations indicated that insignificantly negative association existed among dominant fish species. Chi-square test, Pearson correlation test and Spearman rank correlation test showed that the positive and negative correlation ratios in the community were 0.93, 0.90 and 1 respectively, and the test significance rates were about 9.1%, 18.18% and 21.82% respectively.

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国家重点研发计划 (2017YFA0604902；浙江省一流学科 (A类) “水产学科”项目；浙江省软科学研究计划项目 (2015C25018)