摘要
根据2015年10月、2017年10月在杭州湾灰鳖洋海域开展的渔业资源调查中所获得的鱼类资源资料,对该海域鱼类的种类组成、数量分布、优势种、ABC曲线、生物多样性等进行了研究。结果表明:(1)共鉴定出鱼类33种,隶属于9目15科25属;(2)2015年与2017年秋季鱼类重量密度分别为10.85 kg·km^(-2)和47.12 kg·km^(-2),尾数密度分别为4.92×10~3 ind·km^(-2)和10.06×10~3 ind·km^(-2),2017年鱼类重量、尾数密度均高于2015年;(3)2个年份鱼类资源密度的平面分布特征呈相似的规律,密度较高的站位集中在调查海域东南部海区附近,并呈现东南部海域明显高于西北部海域的趋势;(4)2个年份优势种均为龙头鱼,属于小型低值鱼类;(5)2个年份秋季鱼类总种类数变化较为小,均以沿岸浅海附近种类较多,且北部海域呈现自西向东逐渐减少的趋势;(6)ABC曲线显示,杭州湾灰鳖洋海域的鱼类群落处于严重干扰的状态;(7)鱼类生物多样性指数(H′)、均匀度指数(J′)、丰富度指数(D)2017秋季均高于2015秋季。
Based on the data of fishery resource surveys in October, 2015 and October, 2017 in Huibieyang sea area of Hangzhou bay, we studied the species composition, quantitative distribution, dominant species variatio, ABC curve and biodiversity. The results showed:(1) A total of 33 fish species were identified during fishery resource surveys, which belonged to 25 genera in 15 families of 9 orders.(2) The biomass of fish in the autumn of in this two years were 10.85 kg·km^-2 and 47.12 kg·km-2, respectively. The number abundance density of fish in the autumn of each year were 4.92×10^3 ind·km^-2 and 10.06×10^3 ind·km^-2, respectively.(3) The spatial distribution of fish resources density was generally similar in this two years. The high resources density sites located near the southeastern sea area. Besides, the density of south-east sea area was obviously higher than that of the north-west sea area.(4) The dominant species in both years was the Harpodon nehereus, a small and low-value fishes.(5) The total number of fish species changed slightly in autumn in two years There are more species near the coastal shallow sea, and its trend of the northern sea area was decreasing gradually from west to east.(6) TheABC curve showed that the fish community was in a state of serious disturbance in Huibieyang sea area of Hangzhou bay.(7) The Shannon-Weaver (H′), Pielou (J′) and Margalef (D) in the autumn of 2017 were higher than that in 2015.
作者
刘惠
俞存根
谢旭
颜文超
郑基
LIU Hui;YU Cun-gen;XIE Xu(School of Fisheries of Zhejiang Ocean University, Zhoushan 316022, China)
出处
《浙江海洋大学学报（自然科学版）》
CAS
北大核心
2019年第1期51-59,共9页
Journal of Zhejiang Ocean University：Natural Science
基金
国家自然科学基金(31270527)
关键词
杭州湾灰鳖洋海域
鱼类
资源密度
种类组成
多样性
Huibieyang sea area of Hangzhou bay
fish
resource density
composition
diversity
