浙江南部近海鱼类分类多样性研究

根据2015年11月至2016年8月浙江南部近海鱼类调查资料，采用纳尔逊分类系统整理鱼类物种组成，通过计算分类阶元包含指数(TINCL_i)、分类多样性指数(平均分类差异指数△+和分类差异变异指数∧+)分析浙南近海鱼类的分类多样性。调查结果共记录鱼类182种，分属18目78科130属。TINCL_i分析结果显示，浙南近海鱼类种类组成中，其目、科、属所包含的(科、属、种)、(属、种)和(种)的平均数目分别为(4.33、7.22、10.11)、(1.67、2.33)和(1.40)。浙江南部近海鱼类△+值和∧+值分别为62.9和77.0。浙江南部近海鱼类△+值小于高纬度的黄、渤海(66.4)和山东近海(66.1)，大于低纬度的南沙群岛(56.6)、西沙群岛(60.2)和东沙群岛(55.2)，呈现随着纬度降低鱼类△+值随之降低的规律。通过分析浙江南部近海鱼类的分类多样性，可以为浙江南部近海鱼类资源的可持续开发利用及保护提供重要的参考依据。

Taxonomic diversity of fish species in the off southern Zhejiang, East China Sea

This study documents the data of fish species systematically collected in the off southern Zhejiang, East China Sea, from November 2015 to August 2016, according to Nelson’s classification system and analyzed the diversity at different taxonomic levels. The inclusion index at taxonomic level (TINCL_i), taxonomic diversity (the average taxonomic distinctness △+ and the variation in taxonomic distinctness ∧+) are used in this study. The results show that the fish species in the waters belonged to 18 orders, 78 families, 130 genera and 182 species. It is concluded that the number of species in spring (104 species) is larger than that in autumn (103 species) and winter (93 species), while the smallest number occurs in summer (88 species). Analyzed by TINCL_i, the average numbers of (families, genera, species), (genera, species) and (species) per order, family and genus are (4.33、7.22、10.11), (1.67、2.33) and (1.40). The △+ and ∧+ in the off southern Zhejiang, East China Sea, are 62.9 and 77.0, respectively. The △+ in our study area is less than those in the high latitude areas, such as the Yellow Sea and Bohai Sea (66.4), the coastal waters off Shandong (66.1), and is greater than those in the lower latitude waters including the Nansha Islands (56.6), the Xisha Islands (60.2) and the Dongsha Islands (55.2). The results above indicate that the △+ decreases with latitude. This study analyzed taxonomic diversity of fish species in the off southern Zhejiang, East China Sea, which can provide reference for the exploitation and conservation of fish species in local waters.