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Long-term effectiveness of pingers on a small population of finless porpoises in Japan
http://hdl.handle.net/10069/37428
http://hdl.handle.net/10069/3742824fb9eb8-82c4-42e6-a2df-9123d8647d33
名前 / ファイル | ライセンス | アクション |
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ESR32_35.pdf (417.7 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-05-31 | |||||
タイトル | ||||||
タイトル | Long-term effectiveness of pingers on a small population of finless porpoises in Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Bioacoustics | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Bycatch | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Neophocaena asiaeorientalis | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Pinger | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Small cetacean | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Amano, Masao
× Amano, Masao× Kusumoto, Miku× Abe, Misaki× Akamatsu, Tomonari |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Finless porpoises Neophocaena spp. are under pressure from various anthropogenic impacts due to their coastal habitat. Net fishery bycatch is considered a major risk for the populations around Japan, and mitigation measures are required. We carried out a long-term study to assess the efficiency of acoustic pingers in reducing the encounter rates of narrow-ridged finless porpoises with fishing nets. We used a passive ultrasonic event recorder (A-tag) to obtain acoustic encounter rates of echolocating finless porpoises and compared results for the presence and absence of pinger transmissions in Omura Bay, Japan, over two 8-mo periods (2011 and 2012). Encounter rates were significantly lower during periods when pingers were in operation, but the effect of pingers decreased with time. By the eighth month of the study in each study year, the number of encounters during the ensonified period was greater than that during periods without pingers, suggesting habituation. When pingers were reactivated at the study site after 4 mo of silence, the encounters with the active pingers returned to the lower level observed at the beginning of the experiment. These results reveal that the pingers effectively induce avoidance in porpoises, but that this effectiveness only lasts for a few months, which is likely due to habituation which could be mitigated by alternating periods of several months of silence between periods of active pinger use. | |||||
書誌情報 |
Endangered Species Research 巻 32, p. 35-40, 発行日 2017-01-12 |
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出版者 | ||||||
出版者 | Inter-Research | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18635407 | |||||
EISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 16134796 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.3354/esr00776 | |||||
権利 | ||||||
権利情報 | c The authors 2017. Open Access under Creative Commons by Attribution Licence. Use, distribution and reproduction are un - restricted. Authors and original publication must be credited. | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Endangered Species Research, 32, pp.35-40; 2017 |