葛洲坝水利枢纽下游宜昌江段渔业资源现状

虞功亮; 许蕴玕; 谭细畅; 邓中粦; 常剑波

葛洲坝水利枢纽下游宜昌江段渔业资源现状

中国科学院水生生物研究所, 武汉 430072

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国务院三峡办

中国长江三峡工程开发总公司[SX(98)-15KHB/JS]

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STATUS OF FISHERIES IN THE SECTION BELOW THE GEZHOUBA DAM OF THE YANGTZE RIVER

Institute of Hydobiology, The Chinese Academy of Sciences, Wuhan 430072

摘要: 1997-1999年间统计了葛洲坝水利枢纽工程下游宜昌江段的不同渔具渔获物3254kg。共获得鱼类45种,优势种类为铜鱼、瓦氏黄颡鱼、长鳍吻鮈、圆筒吻鮈、草鱼、鲢、长吻鮠、南方鲇等,鳊、青鱼、鳡等的相对数量比建坝前减少,(鱼宗)、鳜、鳤、鲌类等建坝前的常见种类现在较为少见或罕见。鲥、裂腹鱼、华鲮、暗纹东方鲀等偶见种类以及珍稀鱼类白鲟未被发现。目前该江段渔获物中低龄个体比重较高,性成熟个体较少。过度捕捞是影响坝下江段渔业资源衰退的主要原因。

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Abstract: From 1997 to 1999, investigations on the fishery status had been taken in the section below the Gezhouba Dam in the Yangtze River.A total of 3254.32kg fish were captured with various fishing gears, including trammel, set long line, and set .gill net.Forty-five species were obtained.Dominant species were Coreius guichenoti (Sauvage et Dabry), Coreius heterodon (Bleeker), Pelteobagrus Vachelli (Richardson), Rhinogobio ventralis (Sauvage et Dabry), Rhinogobio ventralis (Sauvage et Dabry), Leiocassis longirostris Günther, Ctenopharyngodon idellus Cuvier et Valenciennes, Hypophthalmichthys molitrix (Cuvier et Valenciennes) and Silurus meridionalis Chen.In comparison with the data gotten before the establishment of Gezhouba dam, the abundance of Parabramis pekinensis (Basilewsky), Mylopharyngodon piceus Richardson, Elopichthys bambusa Richardson, and Ochetobius elongatus Kner had been decreasing.Some rare species, such as Macrura reevesii, Schizothorax (Sch.) prenanti (Tchang), Sinilabeo rendahli rendahli (Kimu-ra), and Fufu obscurus (Abe) have disappeared in the section.

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葛洲坝水利枢纽下游宜昌江段渔业资源现状

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STATUS OF FISHERIES IN THE SECTION BELOW THE GEZHOUBA DAM OF THE YANGTZE RIVER

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