珠江口南沙海域秋季渔业资源群落结构特征

发布时间：2018-03-27 08:17

  本文选题：渔业资源　切入点：群落结构　出处：《南方水产科学》2017年02期

【摘要】：根据2015年11月珠江口南沙海域的渔业资源调查资料,对该海域秋季渔业资源群落组成、优势种和生物多样性等群落结构特征进行了初步研究。结果表明,该海域共出现渔业生物40种,以鱼类和甲壳类为主。其中,底层鱼类21种,中上层鱼类3种,甲壳类16种。相对重要性指数(IRI)可用来度量物种的生态优势度,秋季优势种类有亨氏仿对虾(Parapenaeopsis hungerfordi)和锐齿(Charybdis acuta)2种(IRI≥1 000)。该区域内各站位质量渔获率为0.63~11.15 kg·h~(-1),平均为4.23 kg·h~(-1);尾数渔获率为84~885尾·h~(-1),平均为433尾·h~(-1)。Shannon-Wiener多样性指数(H')为2.07,Margalef丰富度指数(D)为1.64,Peilou均匀度指数(J')为0.59。分析表明,该海域渔获物以小型经济甲壳动物和经济幼鱼为主,渔获个体偏小,总体上多样性空间差异不大。与该区域2002年同月份的调查数据相比,目前渔获物多样性下降明显,群落结构相对简单。
[Abstract]:Based on the survey data of fishery resources in Nansha area of Pearl River Estuary in November 2015, the community structure characteristics of fishery resources in autumn, such as community composition, dominant species and biodiversity, were preliminarily studied. There are 40 species of fishery organisms in this area, including 21 species of bottom fish, 3 species of pelagic fish and 16 species of crustaceans. The relative importance index (IRI) can be used to measure the ecological dominance of species. The dominant species in autumn were Parapenaeopsis hungerfordii and Charybdis acuta)2 species 鈮，

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