| Comparison of echolocation behaviour between coastal and riverine porpoises | |
| Akamatsu, Tomonari; Teilmann, Jonas; Miller, Lee A.; Tougaard, Jakob; Dietz, Rune; Wang, Ding; Wang, Kexiong; Siebert, Ursula; Naito, Yasuhiko; Akamatsu, T, Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Ibaraki 3140408, Japan | |
| 2007 | |
| Conference Name | 2nd International Conference on Bio-logging Science |
| Source Publication | DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY |
| Pages | 290-297 |
| Conference Date | JUN 13-16, 2005 |
| Conference Place | St Andrews, SCOTLAND |
| Department | Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Ibaraki 3140408, Japan; Natl Environm Res Inst, DK-4000 Roskilde, Denmark; Univ So Denmark, Inst Biol, DK-5230 Odense, Denmark; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; Univ Kiel, Forsch & Technol Zentrum Westkuste, D-25671 Hafentorn, Busum, Germany; Natl Inst Polar Res, Tokyo 1738515, Japan |
| Abstract | Echolocation behaviour of a harbor porpoise and six finless porpoises was recorded in open-water systems using acoustic data loggers (A-tag). In total 1359 click trains were recorded during 4.6 h for the harbor porpoise and 46,240 click trains were recorded during 82.3 h for the finless porpoises. The harbor and finless porpoises produced sonar click trains every 12.3 and 6.4 s on average, respectively. During the inter-click-train interval, the porpoises were silent or produced clicks below 148 dB re. 1 mu Pa, the detection threshold of the tag. Ninety percent of the inter-click-train intervals were 20 s or less in both species. This means that porpoises frequently produce intense click trains. Click-train intervals lasting over 50 s constituted 1% of the total intervals in finless porpoises and 4% in the harbor porpoise. Both species swam without intense clicks for less than 10 in in most cases, but occasionally remained silent or used undetected low-intensity clicks for more than 1 min. During these periods, the porpoises would be susceptible to entanglement in fishing nets. (c) 2007 Elsevier Ltd. All rights reserved. |
| Keyword | Bioacoustics Echolocation Marine Mammals By Catch Finless Porpoise Harbor Porpoise |
| Funding Organization | Sea Mammal Res Unit, SMRU, EU Network Excellence Marine Biodivers & Ecosyst Functioning |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000245820500009 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.ihb.ac.cn/handle/342005/11771 |
| Collection | 会议论文 |
| Corresponding Author | Akamatsu, T, Natl Res Inst Fisheries Engn, Fisheries Res Agcy, Ibaraki 3140408, Japan |
| Recommended Citation GB/T 7714 | Akamatsu, Tomonari,Teilmann, Jonas,Miller, Lee A.,et al. Comparison of echolocation behaviour between coastal and riverine porpoises[C],2007:290-297. |
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| Comparison of echolo（261KB） | 开放获取 | -- | View Application Full Text | |||
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