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Diving behaviour of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River, China
Tomonari Akamatsu; Ding Wang; Kexiong Wang; Zhuo Wei; Qingzhong Zhao; Yasuhiko Naito; Akamatsu, T, Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Kashima, Ibaraki 3140421, Japan
2002
Source PublicationICES JOURNAL OF MARINE SCIENCE
Volume59Issue:2Pages:438-443
AbstractDive-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.
KeywordBy-catch Collision With Commercial Vessel Data Logger Diving Behaviour Freshwater Porpoise
DepartmentNatl 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
Subject AreaFisheries ; Marine & Freshwater Biology ; Oceanography
Indexed BySCI
WOS IDWOS:000176335000017
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9838
Collection期刊论文
Corresponding AuthorAkamatsu, T, Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Kashima, Ibaraki 3140421, Japan
Recommended Citation
GB/T 7714
Tomonari Akamatsu,Ding Wang,Kexiong Wang,et al. Diving behaviour of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River, China[J]. ICES JOURNAL OF MARINE SCIENCE,2002,59(2):438-443.
APA Tomonari Akamatsu.,Ding Wang.,Kexiong Wang.,Zhuo Wei.,Qingzhong Zhao.,...&Akamatsu, T, Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Kashima, Ibaraki 3140421, Japan.(2002).Diving behaviour of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River, China.ICES JOURNAL OF MARINE SCIENCE,59(2),438-443.
MLA Tomonari Akamatsu,et al."Diving behaviour of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River, China".ICES JOURNAL OF MARINE SCIENCE 59.2(2002):438-443.
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