Singing in South Africa : monitoring the occurrence of humpback whale (Megaptera novaeangliae) song near the Western Cape

Show simple item record Ross-Marsh, E.C. Elwen, Simon Harvey rinsloo, Alexa Simone James, B.S. Gridley, T. 2020-09-29T12:29:44Z 2021
dc.description.abstract Humpback whales (Megaptera novaeangliae) are highly vocal, producing a wide repertoire of sounds often organised into song. Song is prolific at breeding sites but also documented along migration routes and at feeding sites, including along the west coast of South Africa (28°–34°S). Here we examine the occurrence of humpback whale song within False Bay, South Africa, using intermittent recording periods from moored hydrophones spanning September 2016 to January 2018. Recordings from four locations were scrutinised for humpback whale vocalisations using long-term spectral averages (LTSAs). In total, 7205 h were examined, with song identified in 3% (211 h) of recording hours. Song was exclusively documented in September and October 2016 and was more prevalent at the most westerly sites. Diel patterns of song presence were modelled, showing the likelihood of detection was higher in the early morning and late evening (GAM: p < 0.05). On 15 occasions, two or more singers were detected with temporally overlapping song components. These results indicate prevalent, albeit seasonal, song production by humpback whales off the coast of South Africa and highlight the utility of passive acoustic monitoring to indicate their presence, behaviour, and potential population linkages in the region. en_ZA
dc.description.department Mammal Research Institute en_ZA
dc.description.embargo 2021-01-23
dc.description.librarian hj2020 en_ZA
dc.description.sponsorship The Association for the Study of Animal Behaviour; Claude Leon Foundation; National Research Foundation and University Stellenbosch. en_ZA
dc.description.uri http://www.tandfonline.comtoc/tbio20 en_ZA
dc.identifier.citation E. C. Ross-Marsh, S. H. Elwen, A. S. Prinsloo, B. S. James & T. Gridley (2021): Singing in South Africa: monitoring the occurrence of humpback whale (Megaptera novaeangliae) song near the Western Cape, Bioacoustics 30(2): 163-179, DOI: 10.1080/09524622.2019.1710254. en_ZA
dc.identifier.issn 0952-4622
dc.identifier.other 10.1080/09524622.2019.1710254
dc.language.iso en en_ZA
dc.publisher Taylor and Francis en_ZA
dc.rights © 2020 Informa UK Limited, trading as Taylor & Francis Group. This is an electronic version of an article published in Bioacoustics, vol. 30, no. 2, pp. 163-179, 2021. doi : 10.1080/09524622.2019.1710254. Bioacoustics is available online at : http://www.tandfonline.comtoc/tbio20. en_ZA
dc.subject Humpback whales (Megaptera novaeangliae) en_ZA
dc.subject Migration en_ZA
dc.subject Western Cape en_ZA
dc.subject Acoustic monitoring en_ZA
dc.subject Song en_ZA
dc.title Singing in South Africa : monitoring the occurrence of humpback whale (Megaptera novaeangliae) song near the Western Cape en_ZA
dc.type Postprint Article en_ZA

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