【摘 要】
：
广西合浦儒艮国家级自然保护区位于北部湾东北部,目前以保护鲸豚类动物为主,为研究鲸豚类的食物资源——鱼类资源多样性情况,2018—2019年秋冬季,对儒艮保护区及其邻近海域开展鱼类资源底拖网调查.结果表明,该海域共捕获鱼类124种,隶属14目44科92属.相对重要性指数IRI表明2018年10月线纹鳗鲶(Plotosus lineatus)为优势种,2019年1月铅点东方鲀(Takifugu alboplumbeus)和犬牙缰鰕虎鱼(Amoya caninus)为优势种,2019年10月条马鲾(Equuli
【机 构】
：
沈阳师范大学生命科学学院,辽宁 沈阳110034;南京师范大学生命科学学院,江苏 南京210023;南京师范大学生命科学学院,江苏 南京210023;沈阳师范大学生命科学学院,辽宁 沈阳110034;
论文部分内容阅读
广西合浦儒艮国家级自然保护区位于北部湾东北部,目前以保护鲸豚类动物为主,为研究鲸豚类的食物资源——鱼类资源多样性情况,2018—2019年秋冬季,对儒艮保护区及其邻近海域开展鱼类资源底拖网调查.结果表明,该海域共捕获鱼类124种,隶属14目44科92属.相对重要性指数IRI表明2018年10月线纹鳗鲶(Plotosus lineatus)为优势种,2019年1月铅点东方鲀(Takifugu alboplumbeus)和犬牙缰鰕虎鱼(Amoya caninus)为优势种,2019年10月条马鲾(Equulites rivulatus)、鹿斑仰口鲾(Secutor ruconius)为优势种.平均捕获量呈季节性增长和年际间下降.聚类分析结果表明三个时期鱼类群落结构空间差异较大.三个时期鱼类平均属-科多样性指数(G-F指数)都比较高,分别为0.68、0.75和0.71.综上所述,儒艮保护区鱼类资源多样性较高,群落结构空间差异较大,渔获量有所下降,建议加强对该水域鱼类资源的保护.
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