【作者】 郑亮； 李凡； 吕振波； 徐炳庆； 王田田；

【Author】 ZHENG Liang 1,2 , LI Fan 1 , LV Zhen-bo 1 , XU Bing-qing 1 , WANG Tian-tian 1,2 (1.Shandong Marine and Fishery Research Institute, Shandong Provincial Key Laboratory of Restoration for Marine Ecology, Yantai, Shandong 264006; 2. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China)

【机构】 山东省海洋水产研究所山东省海洋生态修复重点实验室； 上海海洋大学海洋科学学院；

【摘要】 根据2010年和2011年春季(5月)、夏季(8月)、秋季(10月)和冬季(12月)在莱州湾进行的20站位底拖网调查数据,对鱼类生态类型组成及季节变化进行了研究。结果表明,2周年共捕获鱼类55种,全部为硬骨鱼类,隶属于8目29科49属。目级分类单元包含指数为(3.63,6.13,6.88),科级分类单元包含指数为(1.69,1.90),属级分类单元包含指数为(1.12)。根据鱼类适温类型划分,暖温种种类数最多,占总种类数的60%,暖水种和冷温种种类数相同,均占20%。根据鱼类栖栖所类型划分,大陆架浅水底层鱼类种类最多,大陆架浅水中底层鱼类次之。莱州湾暖温种种类数在各季节均为最多,生物量占优势。大陆架浅水底层鱼类种类数在各季节均最高,生物量在夏、秋季占优势,而在冬季其被大陆架浅水底层鱼类取代。与历史调查结果相比,莱州湾鱼类种类数已大幅减少,但适温类型组成并未发生较大程度改变。与我国其他海域相比,莱州湾鱼类包含指数明显偏低。更多还原

【Abstract】 As human impacts on marine ecosystems continue to increase, the effects on the structure of fish resources are well known. Based on trawl survey data in the Laizhou Bay in 2010 and 2011, changes of species composition of fishes were studied. In the investigated area, 119°05′-120°00′E, 37°12′-37°40′N, 20 sample stations were set up. A total of 55 species were collected, all of them were Osteichthyes species, belonging to 49 genera, 29 families and 8 orders. The inclusion index at level of order was (3.63, 6.13, 6.88). Warm temperate species accounted for 60% of total species, followed by warm water species and cold temperate species, which both accounted for 20% of total species. Numbers of continental shelf pelagic-neritic fish (CPN) was highest, followed by continental shelf demersal fish (CD). Warm temperate species was dominant in each survey both in numbers of species and biomass. CPN were most dominant groups in all seasons in term of numbers of fishes. They are dominant in biomass in summer and autumn, but replaced by CD in winter and spring. Compared with historical survey results, the total numbers of fish species in Laizhou bay declined substantially. But the temperature-adapted components of fishes have not significant changed. The inclusion index at taxonomic level of fishes in Laizhou bay was significantly lower than other sea areas in China.更多还原