长江上游三层流刺网渔业现状的调查  

A SURVEY ON THE COMMERCIAL TRAMMEL NET FISHERY IN THE UPPER REACHES OF THE YANGTZE RIVER

作　　者：但胜国[1] 张国华[1] 苗志国[1] 邓昕[1] 

机构地区：[1]中国科学院水生生物研究所,武汉430072

出　　处：《水生生物学报》1999年第6期655-661,共7页Acta Hydrobiologica Sinica

基　　金：国务院三峡办公室;中国长江三峡工程开发总公司[SX(97)-18/HB;SX(98)-15KHB/JS];中国科学院"九五"重大A专题(KZ951-A1-202-03-03)资助

摘　　要：1997-1999年对长江上游宜宾江段和合江江段的三层流刺网渔业现状进行了调查。合江江段三层流刺网内网目在10-180mm之间,宜宾江段以50mm以下的网目为主。采集到的鱼类有59种,包括17种长江上游特有鱼类;渔获物组成存在区域、季节和年际之间的差异。目前长江上游的捕捞强度比70年代显著提高。From 1997 to 1999, a survey on the status of the driftedtrammel net fishery was taken. 59 species, among which 17 species are endemics to the upper reaches of the Yangtze River, were found in the catches of trammel nets. Mesh sige of inner panel range from 10 to 180 mm in the Hejiang reach, and less than 50 mm in the Yibin reach. Regional and temporal differences of catch composition were observed. Dominant species in the catches are Pel-teobagrus vachelli, Coreius guichenoti , Cyprinus carpio, Rhinogobio ventralis, Coreius heterodon, Leiocassis longirostris, and Silurus Meridionalis . Average daily catch per boat was 1.222-1.949 kg in Yibin, 4.034-4.573 kg in Hejiang in 1998-1999, which was much less than that of 1973.

关 键 词：三层流刺网 渔获物组成 单位渔获努力量 特有鱼类 长江上游 

分 类 号：S974[农业科学—捕捞与储运]