瓯江口海域夏秋季鱼类初步调查

Preliminary investigation on the fishes of Oujiang river estuary

2007年6月和9月对瓯江口海域通过拖网和张网捕获的鱼类进行初步调查。结果表明:渔获物中出现2纲12目33科55属72种鱼类,其中软骨鱼纲2目2科2属4种,占调查鱼类总种数的5.6%;硬骨鱼纲10目31科53属68种,占调查鱼类总种数的94.4%。根据其适温性类型可分为暖水性种、暖温性种和冷温性种,其中,暖水性鱼类有27种,占总种数的37.5%;暖温性鱼类有41种,占总种数的56.9%;冷温性鱼类有4种,占总种数的5.6%。渔获物中底层和近底层鱼类占多数,其中,底层鱼类共有27种,占总种数的37.5%;近底层鱼类共有30种,占总种数的41.7%;中上层鱼类共有15种,占总种数的20.8%。渔获物中海洋性鱼类占绝大多数,共有59种,占总种数的81.9%;河口性鱼类11种,占总种数的15.3%;洄游性鱼类2种,占总种数的2.8%。与相邻海区鱼类区系特征比较,瓯江口海域具有我国亚热带北部河口海湾的鱼类区系特征。

An investigation of fishes by trawl and swing net in Oujiang river estuary in June and September 2007 has been carried out,the results showed： All the speciments collected were examined and a total of 72 species were identified belonging to 55 genera,33 families,12 orders and 2 classes,and there were 4 species belonging to Chondrichthyes,68 species belonging to Osteichthyes,accounting for 5.6% and 94.4%,respectively.Based on the temperature nature of the fauna,the fishes in Ouijang river estuary may be grouped into three types,with warm water species,warm temperature species and cold temperature species respectively accounting for 37.5%,56.9% and 5.6%;According to the diversity of habitable environment,the fishes may be grouped into three types,namely demersal fish,near demersal fish and superstratum and mesopelagic fish accounting for 37.5%,41.7% and 20.8%;According to the ecological type,the fishes may be grouped into three types,with oceanic fish,estuarine fish and superstratum and migrating fish accounting for 81.9%,15.3% and 2.8%.Compared with other sea areas around Oujiang river estaury,there were typical fish-faunal characters in semi-tropical north estuary and bay.