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学科主题: Fisheries; Marine & Freshwater Biology; Oceanography
题名: Diving behaviour of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River, China
作者: Tomonari Akamatsu ; Ding Wang ; Kexiong Wang ; Zhuo Wei ; Qingzhong Zhao ; Yasuhiko Naito
通讯作者: Akamatsu, T, Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Kashima, Ibaraki 3140421, Japan
关键词: by-catch ; collision with commercial vessel ; data logger ; diving behaviour ; freshwater ; porpoise
刊名: ICES JOURNAL OF MARINE SCIENCE
发表日期: 2002
卷: 59, 期:2, 页:438-443
收录类别: SCI
部门归属: Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Kashima, Ibaraki 3140421, Japan; Natl Inst Polar Res, Tokyo 1738515, Japan; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
摘要: Dive-depth and swim-speed of a juvenile and an adult free-ranging, Yangtze finless porpoises (Neophocaena phocaenoides) were observed using velocity-time-depth recorders in an oxbow of the Yangtze River. In total, 8222 individual dives were recorded over 59 hours. Two dive types, deep-dive (greater than or equal to 2.7 m) and shallow-dive. were recognized. Horizontal travel distances of two finless pot-poises in a day were 94.4 km and 90.3 km, which were longer than those of oceanic relative species (harbor porpoises, Phocoena phocoena). Although the shallow water limited the maximum dive-depth, dive-duration, and bottom-time of finless porpoises were similar to the harbor porpoises. A sudden drop of swim-speed below 0.25 m s(-1) was frequently observed nearby the maximum dive-depth. This seemed to indicate "turning, around" behaviour, possibly during prey pursuit. (C) 2002 Published by Elsevier science Ltd on behalf of International Council for the Exploration of the Sea.
WOS记录号: WOS:000176335000017
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/9838
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Tomonari Akamatsu; Ding Wang; Kexiong Wang; Zhuo Wei; Qingzhong Zhao; Yasuhiko Naito.Diving behaviour of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River, China,ICES JOURNAL OF MARINE SCIENCE,2002,59(2):438-443
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