钱塘江富阳段鱼类资源现状

发布时间：2018-02-03 21:39

本文关键词： 鱼类资源优势种富阳段　出处：《淡水渔业》2017年03期 　论文类型：期刊论文

【摘要】：2014年11月—2015年12月对钱塘江富阳江段3个断面鱼类资源进行了逐月采样调查,对该水域鱼类种类组成、优势种、群落多样性指数和捕捞量进行分析。结果显示:共采集鱼类48种,隶属8目13科37属,其中鲤科鱼类种类最多,占总种类数的64.58%,优势种为鲢、鲤、鲫和光泽黄颡鱼。各月中,4月份捕获的鱼类种数最多,占总种数的52.08%;9月份鱼类捕获量最高,占总渔获量的17.85%。Margalef丰富度指数4月份较高,2月份较低;Shannon-Wiener多样性指数和Pielou均匀度指数在7月份较高,9月份较低,而Simpson多样性指数与之相反。富阳段鱼类捕捞强度较大,渔获物中小个体鱼类占主要部分。与历史记录比较,富阳江段鱼类群落组成已经发生了显著变化,除本地种光泽黄颡鱼外,增殖放流鱼种已成为了优势或重要种群。
[Abstract]:The fish resources of three sections of Fuyang reach of Qiantang River were sampled monthly from November 2014 to December 2015. The species composition and dominant species of fish in this area were investigated. The results showed that 48 species of fish were collected, belonging to 8 orders, 13 families and 37 genera, among which the species of Cyprinidae were the most, accounting for 64.58% of the total species. The dominant species were silver carp, common carp, crucian carp and Pelteobagrus fulvidraco. In September, the fish catch was the highest, accounting for 17.85. Margalef richness index was higher in April and lower in February. Shannon-Wiener diversity index and Pielou evenness index were higher in July and lower in September. The Simpson diversity index was the opposite. The fishing intensity of the fish in Fuyang section was higher, and the catch of small and medium-sized individual fish accounted for the main part, compared with the historical records. The community composition of fish in Fuyang River has changed significantly, except for the native species, Pelteobagrus fulvidraco, the proliferating and releasing species have become the dominant or important species.
【作者单位】：浙江省淡水水产研究所农业部淡水渔业健康养殖重点实验室浙江省淡水水产遗传育种重点实验室中国水产科学研究院东海水产研究所浙江研究中心;
【基金】：浙江省海洋与渔业局渔业资源增殖放流项目(浙财农[2014]277号) 浙江省科技厅公益技术研究农业项目(2014C32066)
【分类号】：S932.4
【正文快照】： 钱塘江是浙江省最大河流,跨浙江、安徽两省,浙江省内流域面积达44 014.50 km2,其中富阳段全长52 km,江中分布新沙岛、东洲岛等10多个大小岛屿、沙洲,水位相对稳定,河道宽敞,饵料资源丰富,鱼类集中,是渔业利用的重要场所[1]。钱塘江的鱼类资源调查报道寥寥无几,如毛节荣[2]调查

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