浙江中北部沿海人工渔礁拟投放区夏季近底层水生游泳动物组成分析

通过对浙江中北部海区13个人工渔礁拟投放点的拖网调查,从而获得了各拟投放点的水生游泳动物组成数据并进行分析,研究结果表明：在浙江中北部人工渔礁拟投放区海域共捕获水生游泳动物50种,分别隶属于3门,3纲,14目,34科。其中,鱼类26种,虾蟹类20种,头足类3种,其他甲壳类1种。各类群的资源重量密度指数和资源尾数密度指数的最大值分别出现在P1号站和P7号站。水生游泳动物的优势种为中国毛虾Acetes chinensis、中华管鞭虾Solenocera crassicor-nis、矛尾鰕虎鱼Chaeturichthys stigmatias、口虾蛄Oratosquilla oratoria、须赤虾Metapenaeopsis barbata、葛氏长臂虾Palaemon gravieri,常见种为双斑蟳Charybdis bimaculata、鹰爪虾Trachypenaeus curvirostris、狼牙鳗鰕虎鱼Taenioides rubicundus、哈氏仿对虾Parapenaeopsis hardwickii、长蛸Octopus variabilis、日本蟳Charybdis japonica、皮氏叫姑鱼Johnius belengerii、带鱼Trichiurus japonicus、前肛鳗Dysomma anguillare、剑尖枪乌贼Loligo edulis、刺鲳Psenopsis anomala、小黄鱼Larimichthys poly-actis、细巧仿对虾Parapenaeopsis tenella等。

Analysis on the Species Composition of Nekton in Summertime in the Spots Planning to Put Artificial Reef in the Middle and Northern Sea Area of Zhejiang

Based on the investigated data taken from trawl in the thirteen spots where artificial reef was planning to put in, the species composition of nekton in each spot was analyzed. The results showed that 50 species of aquatic animals were caught, belonging to 34 families, 14 orders, 3 classes and 3 phylum. Among the 50 species, there are 26 fishes, 20 shrimp and crab, 3 cephalopod and 1 other species. The weight abun- dance density index and the number abundance density index of each species are in spot 1 and 7 respectively. The dominant species were A cetes chinensis, Solenocera crassicornis, Chaeturichthys stigmatias, Oratosquilla o- ratoria, Metapenaeopsis barbata, Palaemon gravieri and the familiar species were Charybdis bimaculata, Trachypenaeus curvirostris, Taenioides rubicundus, Parapenaeopsis hardwickii, Octopus variabilis, Charybdis japonica, Johnius belengerii, Trichiurus japonicus, Dysomma anguiUare, Loligo edulis, Psenopsis anomala, Larimichthys polyactis, Parapenaeopsis tenella etc.