嘉陵江下游鱼类资源现状调查

2003年5月至10月对嘉陵江下游的鱼类资源进行了调查,并对该水域鱼类资源变动的原因进行了探讨。计调查226船次,统计渔获物1153kg,测量鱼类标本19378尾。共记录鱼类92种,隶属于5目14科61属,其中有13种为该水域新记录。结果表明嘉陵江水域生态环境的变化导致鱼类物种组成、种群结构发生了变化;珍稀鱼类、洄游性或半洄游性鱼类的种群数量急剧减少甚至绝迹,如中华鲟、达氏鲟、白鲟、胭脂鱼、等。

Status of Fish Resources in the Lower Reaches of the Jialing River

The investigation of fish resources was carried on in the lower reaches of Jialing River.1153 kg fishery capture was obtained by 226 sailings from May to October in 2003 and 19378 fish specimen were measured.There were 92 species of fish,which belonged to 5 orders 14 families 61 genera.13 of 92 species were new records in the water areas.The change of ecological environment in Jialing River resulted in the change of the fish composition and community.The population quantity of the rare fish,migration or half migration fish such as Acipenser sinensis,Acipenser dabryanus,Psephurus gladius,Myxocyprinus asiaticus,Luciobrama macrocephalus reduced and even disappeared sharply.