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タイトル: | Differences in Biosonar Sound Characteristics between Cetacean Species in the Istanbul Strait |
著者: | KAMEYAMA, SAHO AKAMATSU, TOMONARI DEDE, AYHAN ÖZTÜRK, AYAKA AMAHA ARAI, NOBUAKI |
キーワード: | passive acoustic monitoring harbor porpoise bottlenose dolphin |
発行日: | Mar-2014 |
出版者: | Kyoto University Design School |
誌名: | PROCEEDINGS of the Design Symposium on Conservation of Ecosystem (The 13th SEASTAR2000 workshop) |
巻: | 2 |
開始ページ: | 46 |
終了ページ: | 49 |
抄録: | Previous visual observation suggested there is a possibility of difference in habitat use between harbor porpoise (Phocoena phocoena) and bottlenose dolphin (Tursiops truncatus) in the Istanbul Strait (Bosphorus). However, no direct evidence of difference was recorded, except for the number and area of sightings so far. From 12 April to 1 June 2012, passive acoustic monitoring was conducted with visual observation. The click trains with visual confirmation of species were extracted to compare the difference of inter-click intervals between harbor porpoise and bottlenose dolphins. In the results, the inter-click intervals showed multimodal distribution, which had one peak around 40-50 ms and the other around 100-130 ms in bottlenose dolphins. On the other hand, harbor porpoises showed only one peak around 10-20 ms. These results suggest that two species are using biosonar for different sensing distances even in the same area. |
記述: | March 18-19, 2013 |
DOI: | 10.14989/185130 |
URI: | http://hdl.handle.net/2433/185130 |
出現コレクション: | PROCEEDINGS of the Design Symposium on Conservation of Ecosystem Volume 2 (The 13th SEASTAR2000 workshop) |
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