韭山列岛附近海域渔业资源分析

根据浙江省海洋水产研究所于2005年11月至2006年10月在韭山列岛附近海域四个航次的底拖网调查资料,结合2006年定置刺网调查资料和张网与灯光围网监测资料,对该海域的渔业资源状况进行了分析。结果表明:四种作业方式共捕获水生动物119种,其中,鱼类72种,虾蟹类29种,头足类6种,其他类(包括腹足纲、双壳纲及甲壳纲中的虾蛄科)12种,隶属于3门,6纲,22目,66科。其中,拖网调查共捕获水生动物77种,其中鱼类41种,虾蟹类21种,头足类3种,其他类12种,隶属于3门,6纲,18目,45科。拖网调查渔获的水生动物中鲈形目的数量达22种,明显高于其他目的鱼类数量。拖网各航次各类群的资源尾数密度指数与资源重量密度指数的最大值分别出现在5月份和10月份。拖网渔获水生动物的优势种:4月份为日本鼓虾、日本蟳与鮸鱼;5月份为六丝钝尾鰕虎鱼,日本鼓虾与日本蟳;10月份为龙头鱼、口虾蛄、日本蟳、棘头梅童鱼与中华管鞭虾;11月份为棘头梅童鱼、日本鼓虾、口虾蛄与海鳗。

Analysis on the condition of fishery resources in the sea area around the Jiushan Archipelago

Based on the investigated data taken from trawl,gillnet,swing net and purse seine during November 2005 to October 2006,conducted by the Marine Fisheries Research Institute of Zhejiang Province,the condition of the fishery resources in the sea area around the Jiushan Archipelago was analyzed.It came to the conclusions that 119 species of aquatic animals were caught,which belonged to 66 families,in 22 orders,6 classes and 3 phylums.Among them there were 77 species of aquatic animals belonging to 45 families in 18 orders caught by trawl,of which 41 species were fishes,21 species were crustaceans,3 species were cephalopodas, and 12 species were other invertebrates.The number of fish species of perciformes in the four trawl investigating trips was 23,obviously more than that in the other orders.In all trawl trips,the weight abundance density index in October 2006 was the highest,the number abundance density index was the highest in May 2006 and the dominant species composition were Alpheus japonicus,Charybdis japonica and Miichthys miiuy in April;Amblychaeturichthys hexanema,Alpheus japonicus and Charybdis japonica in May;Harpodon nehereus,Oratosquilla oratoria,Charybdis japonica,Collichthys lucida and Solenocera crassicornis in October;Collichthys lucida,Alpheus japonicus,Oratosquilla oratoria and Muraenesox cinereus in November.