【摘 要】
：
根据2018年4月(春季)和10月(秋季)在舟山群岛东侧海域(29°10′25.54“～30°45′00”N,122°53′3.88“～124°48′28.31”E)开展的渔业资源底拖网调查所获得的蟹类数据,研究了该海域蟹类资源的种类组成、优势种、生物多样性等群落结构特征,同时分析了蟹类数量分布及其群落结构与温、盐等环境因子之间的关系.结果表明,调查海域春、秋季蟹类种类共有40种,隶属于12科,23属;其中,春季优势种为双斑鲟(Charybdis bimaculata),秋季优势种为双斑鲟和三疣梭子蟹(P
【机 构】
：
浙江海洋大学水产学院,浙江舟山 316022
论文部分内容阅读
根据2018年4月(春季)和10月(秋季)在舟山群岛东侧海域(29°10′25.54“～30°45′00”N,122°53′3.88“～124°48′28.31”E)开展的渔业资源底拖网调查所获得的蟹类数据,研究了该海域蟹类资源的种类组成、优势种、生物多样性等群落结构特征,同时分析了蟹类数量分布及其群落结构与温、盐等环境因子之间的关系.结果表明,调查海域春、秋季蟹类种类共有40种,隶属于12科,23属;其中,春季优势种为双斑鲟(Charybdis bimaculata),秋季优势种为双斑鲟和三疣梭子蟹(Portunus trituberculatus),均为广温、广盐性种类;秋季丰富度指数(D)及Shannon-Wiener多样性指数(H′)高于春季,而Pielou均匀度指数(J′)则相差不大;独立样本T检验方法显示,春、秋两季渔获量之间存在显著性差异(p<0.01);根据聚类分析与非度量多维标度排序分析,春、秋季蟹类均可划分为4个组群,SIMPER分析结果显示,秋季群落相似性大于春季;典范对应分析结果表明,底层水温和表层盐度是影响调查海域蟹类群落结构及数量分布的主要环境因子.
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1 Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology/Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources, School of Geography and Ocean Science, Nanjing University, Nanjing 210023,