春、夏季舟山渔场及其邻近海域鱼类群落格局

根据2006年8月和2007年4月在舟山渔场及其邻近海域渔业资源和环境调查所获得的数据,采用非线性多维标度(MDS)和典范对应分析(CCA)方法研究了该海域的鱼类群落种类组成及群落特征.结果表明:春季该海域共捕获鱼类62种,隶属11目36科56属,主要优势种为六丝钝尾虾虎鱼(Amblychaeturichthys hexanema)和小黄鱼(Larimichthys polyactis),两种丰度占总丰度的82.9％;夏季共捕获鱼类58种,隶属于11目38科51属,主要优势种为六丝钝尾虾虎鱼、短鳄齿鱼(Champsodon snyderi)、前肛鳗(Dysomma anguillaaris)和发光鲷(Acro-poma japonicum),其丰度占总丰度的60.8％.春、夏两季20个站位均可划分为3个组.春、夏季出现率大于5.0％的鱼类分别有26种和30种,并且分别相应形成2个和3个组群.

Community structure of fish in Zhoushan Fishing Ground and its adjacent waters in spring and summer

Based on the investigation data of the fishery resources and environment in Zhoushan Fishing Ground and its adjacent waters in August 2006 and April 2007, and by using multi-dimensional scaling (MDS) and canonical correspondence analysis (CCA), this paper studied the species composition and the characteristics of fish community in the area. In spring, a total of 62 fish species were captured, belonging to 56 genera, 36 families and 11 orders. The dominant species were Amblychaeturichthys hexanema and Larimichthys polyactis, and their abundance occupied 82. 9% of the total. In summer, 58 fish species were captured, belonging to 51 genera, 38 families and 11 orders. Amblychaeturichthys hexanema, Champsodon snyderi, Dysomma anguillaaris and Acropoma japonicum were the dominant species, with the abundance accounted for 60.8% of the total. In the two seasons, twenty stations were separated into three groups. Among the fishes captured, 26 and 30 fish species had an occurrence rate larger than 5.0% in spring and summer, respectively, and formed two and three assemblages correspondingly.