冯佶,李渊,林龙山,王良明,张然,张静

• 1:自然资源部第三海洋研究所海洋生物与生态实验室
• 2:集美大学水产学院

摘要(Abstract)：

根据2012—2013年秋、春两个航次在南沙群岛西南部海域探捕调查数据,系统整理了调查海域鱼类物种组成并分析其季节更替,通过计算调查海域鱼类相对重要性指数(IRI)、分类阶元包含指数(TINCLi)以及分类学多样性指数(Δ~+和∧~+),初步探讨了该海域鱼类分类多样性现状。结果显示,调查海域鱼类共有27目104科206属340种,其中鲈形目种类数目占绝对优势。当采用IRI≥500标准定义优势种时,秋季优势种有2种,春季有4种,不同季节鱼类优势种存在差异,并且主要鱼种的季节更替现象明显。分类阶元包含指数分析结果显示,鱼类物种组成中,目、科、属各分类阶元包含各低级分类阶元的平均数目分别为(3.85、7.63、12.59),(1.98、3.27)和(1.65)。调查海域Δ~+值和∧~+值分别为66.3和100.2,其中Δ~+值高于大亚湾(62.2)和北部湾(63.5),最接近于东海陆架区(65.7)。研究结果显示南沙群岛西南部海域鱼类分类多样性目前并未发生显著变化,但仍应关注人类活动对该海域鱼类多样性的影响。

关键词(KeyWords)： 分类多样性;鱼类组成;相对重要性指数;分类阶元包含指数;分类学多样性指数

Abstract:

Keywords:

基金项目(Foundation): 全球变化与海气相互作用专项(GASI-02-SCS-YDsum;GASI-02-SCS-YDaut;GASI-02-SCS-YDspr)资助~~

作者(Author): 冯佶,李渊,林龙山,王良明,张然,张静

DOI: 10.16441/j.cnki.hdxb.20190097

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