海洋渔业2026，Vol.48Issue(2)：138-154,17.
乐清湾春、秋季游泳动物群落结构特征及与环境因子关系研究
Nekton community structure characteristics and their relationship with environmental factors in Yueqing Bay in spring and autumn
摘要
Abstract
Two trawl fishing surveys were conducted to reveal the community structure,biomass,and biodiversity of nekton in the Yueqing Bay in the southern Zhejiang in November,2021(autumn)and May,2022(spring).The cluster analysis,non-metric multidimensional scaling,and redundancy analysis were used to study the relationship between community structure and environmental factors.79 species belonging to 14 orders,40 families,and 62 genera were identified in the two surveys,including 47 fish species and 32 crustacean species.47 species were identified in spring survey and 40 species were identified in autumn survey.Portunus trituberculatus,Collichthys lucidus and Harpodon nehereus were the dominant species in spring survey while Portunus trituberculatus,Harpodon nehereus and Charybdis japonica were the dominant species in autumn.Compared with the survey data in the 1960s and 1970s,the dominant species had evolved from high-value economic species to small,low-value fish.The resource densities of nekton biomass and individual were 1.32×103 kg·km-2 and 75.02×103 ind·km-2 in spring.From a spatial perspective,the biomass and individual resource densities were the highest in the middle bay.The resource densities of nekton biomass and individual were 1.34×103 kg·km-2 and 66.29×103 ind·km-2 in autumn.From a spatial perspective,the biomass and individual resource densities were the highest outside the bay.The individual resource density in spring was slightly higher than that in autumn,and the biomass resource density was roughly the same.The diversity index(H'),evenness index(J'),and richness index(D)in autumn were higher than those in spring,and there were significant differences in the diversity index and evenness index between spring and autumn(P<0.05).As the RDA analysis shown,depth and dissolved oxygen were the main environmental factors on the variation of community structure of nekton in the Yueqing Bay,and the correlations varied with seasons.In spring,Portunus trituberculatus,Collichthys lucidus,Harpodon nehereus,Charybdis japonica,and Coilia nasus were positively correlated with dissolved oxygen.while in autumn,Collichthys lucidus,Harpodon nehereus and Coilia nasus were negatively correlated with dissolved oxygen.The research can provide basic information for understanding the current status of fishery resources in the Yueqing Bay,with a view to providing scientific basis for the formulation of relevant fishery resource management measures.关键词
游泳动物/资源密度/群落结构/多样性指数Key words
nekton/resource density/community structure/diversity index分类
生物科学引用本文复制引用
白桦,程方平,张荣良,冯志华,陈全震,曾江宁,翟天琦,黄伟..乐清湾春、秋季游泳动物群落结构特征及与环境因子关系研究[J].海洋渔业,2026,48(2):138-154,17.基金项目
国家自然科学基金项目(42076169) （42076169）
国家重点研发计划项目(2022YFF0802203,2019YFD0901101) （2022YFF0802203,2019YFD0901101）
自然资源部第二海洋研究所基本科研业务费专项(JG2106) （JG2106）
浙江省自然科学基金杰出青年项目(LR21D060001) （LR21D060001）
自然资源部海洋生态系统动力学重点实验室开放研究基金项目(MED202003) （MED202003）
中国亚太经合组织合作基金(2029901) （2029901）
卫星海洋环境动力学国家重点实验室自主课题重点项目(SOEDZZ2102) （SOEDZZ2102）
