长江三峡库区蓄水后鱼类资源现状

2005~2006年对三峡库区长江干流及主要支流的鱼类资源进行了3次流动调查,共设17个采样点,每次调查时间为1~2个月;同时在巴南和万州进行定点监测,每月2次。监测到鱼类108种,分属9目20科71属。鲢、南方鲶、鲤、黄颡鱼类、铜鱼、圆口铜鱼、长鳍吻鮈、圆筒吻鮈、长吻鮠、草鱼、鲹类为三峡库区渔获物主要种类。不同江段的渔获物组成存在差异,渔获物中个体小型化、低龄化现象明显。

Studies on Fishery Resources in the Three Gorges Reservoir of the Yangtze River

Form 2005 to 2006,the fishery status of the Three Gorge s reservoir was surveyed for 3 times.For each survey,17 stations were set,and ev ery survey last for 1 to 2 months.At the same time,point monitoring in Banan and Wanzhou section of Yangtze River was taken twice each month.The survey found 11 0 fishes which can be classified for 9 orders 15 families 67 genus.Hypop hthalmichthys molitrix(Cuvier et Valenciennes)、Silurus solldatovi(Nikolsky et soin)、Cyprinus carpio (Linnaeus)、Pelteobagrus fulvidraco (Richardson )、Coreius heterodon(Bleeker)、Coreius guichenoti (Savuage et Dabry)、Rhinogobio ventralis (Sauvage et Dabry)、Rhinogobio cylindricus(Günther )、Leiocassis longirostris(Günther)、Cteno pharyngodon idella(Cuvier et Valenciennes)and Hemicult er were the main species in the Three Gorges reservoir.The catches in di fferent sections of the river were different,and miniaturization and trent of th e lower age was quite district.In catches,the number of low-aged and small indi vidual had been getting more.