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   <subfield code="a">Variation in Guiana dolphin ( Sotalia guianensis ) whistles: using a broadband recording system to analyze acoustic parameters in three areas of southeastern Brazil</subfield>
   <subfield code="h">[Elektronische Daten]</subfield>
   <subfield code="c">[Luciana de Andrade, Isabela Lima, Halerson da Silva Macedo, Rafael de Carvalho, José Lailson-Brito Jr., Leonardo Flach, Alexandre de Freitas Azevedo]</subfield>
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   <subfield code="a">The Guiana dolphin produces a variable whistle repertoire related to different social contexts. The current study evaluates Guiana dolphin whistles at a microscale. Acoustic parameters of whistles were compared between three areas in southeastern Brazil using a recording system with sampling rate of 96kHz. Previous studies that utilized a sampling rate of 48kHz reported little variation between adjacent areas in Brazil. Nine acoustic parameters of the whistles (duration, start, end, minimum and maximum frequencies, delta frequency, frequency at 1/4, 1/2, and 3/4 of duration) were measured and whistles were classified into five contour forms. A total of 659 whistles were analyzed, of which 62.20% showed an ascending contour form. The Guiana dolphin emitted whistles with a fundamental frequency reaching 44.9kHz. Dolphin whistles from the three study areas varied significantly in nine acoustic parameters. The whistle duration was shorter (272.44 ± 105.25ms) in Guanabara Bay than those in Sepetiba (360.05 ± 135.16ms) and Paraty Bays (376.80 ± 159.78ms). The start and minimum frequencies of the whistles in Guanabara Bay was significantly higher than those in Sepetiba and Paraty Bays. The results of discriminant function analysis indicated a significant difference between Guanabara Bay and the other two areas. Comparisons of the ascending, descending-ascending, and multi whistles between areas showed differences in some acoustic parameters. In this study, by doubling the sampling rate in our recording systems, we were able to more accurately sample the whistle repertoire of Guiana dolphins in southeastern Brazil, and thereby detect differences in whistles between neighboring populations.</subfield>
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   <subfield code="a">Springer-Verlag Berlin Heidelberg and ISPA, 2014</subfield>
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   <subfield code="a">Sotalia guianensis</subfield>
   <subfield code="2">nationallicence</subfield>
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   <subfield code="a">Whistles</subfield>
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   <subfield code="a">Microscale variation</subfield>
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   <subfield code="a">Bioacoustic</subfield>
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   <subfield code="a">de Andrade</subfield>
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   <subfield code="u">Pós-Graduação em Ecologia e Evolução (PPGEE), Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil</subfield>
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   <subfield code="u">Faculdade de Oceanografia (FAOC), Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA), Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil</subfield>
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   <subfield code="u">Faculdade de Oceanografia (FAOC), Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA), Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil</subfield>
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   <subfield code="u">Faculdade de Oceanografia (FAOC), Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA), Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil</subfield>
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   <subfield code="u">Instituto Boto Cinza, Rua Santa Terezinha 531, 23860-000, Rio de Janeiro, Rio de Janeiro, Brazil</subfield>
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   <subfield code="a">de Freitas Azevedo</subfield>
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   <subfield code="t">acta ethologica</subfield>
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   <subfield code="g">18/1(2015-02-01), 47-57</subfield>
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   <subfield code="a">BK010053</subfield>
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   <subfield code="a">Metadata rights reserved</subfield>
   <subfield code="b">Springer special CC-BY-NC licence</subfield>
   <subfield code="2">nationallicence</subfield>
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