Inter-individual difference of one type of pulsed sounds produced by beluga whales ( Delphinapterus leucas )
Belugas often exchange one type of broadband pulsed sounds (termed PS1 calls) which possibly functions as a contact calls (Morisaka et al., 2013). Here we investigate how belugas embed their signature information into the PS1 calls. PS1 calls were recorded from each of five belugas including both se...
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| Veröffentlicht in: | The Journal of the Acoustical Society of America 2014-10, Vol.136 (4_Supplement), p.2074-2074 |
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| container_title | The Journal of the Acoustical Society of America |
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| creator | Mishima, Yuka Morisaka, Tadamichi Itoh, Miho Suzuki, Ryota Okutsu, Kenji Sakaguchi, Aiko Miyamoto, Yoshinori |
| description | Belugas often exchange one type of broadband pulsed sounds (termed PS1 calls) which possibly functions as a contact calls (Morisaka et al., 2013). Here we investigate how belugas embed their signature information into the PS1 calls. PS1 calls were recorded from each of five belugas including both sexes and various ages at the Port of Nagoya Public Aquarium using a broadband recording system when in isolation. Temporal and spectral acoustic parameters of PS1 calls were measured and compared among individuals. Kruskal-Wallis test revealed that inter-pulse intervals (IPIs), the number of pulses, and pulse rates of PS1 calls had significant differences among individuals, but duration did not (χ2 = 76.7, p |
| doi_str_mv | 10.1121/1.4899448 |
| format | Article |
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Here we investigate how belugas embed their signature information into the PS1 calls. PS1 calls were recorded from each of five belugas including both sexes and various ages at the Port of Nagoya Public Aquarium using a broadband recording system when in isolation. Temporal and spectral acoustic parameters of PS1 calls were measured and compared among individuals. Kruskal-Wallis test revealed that inter-pulse intervals (IPIs), the number of pulses, and pulse rates of PS1 calls had significant differences among individuals, but duration did not (χ2 = 76.7, p<0.0001; χ2 = 26.2, p<0.0001; χ2 = 45.3, p<0.0001; and χ2 = 4.7, p = 0.316 respectively). The contours depicted by the IPIs as a function of pulse order were also individually different and only the contours of a calf fluctuated over time. Four belugas except a juvenile had individually distinctive power spectra. These results suggest that several acoustic parameters of PS1 calls may hold individual information. 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| title | Inter-individual difference of one type of pulsed sounds produced by beluga whales ( Delphinapterus leucas ) |
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