dc.contributor.author |
Shabangu, Fannie Welcome
|
|
dc.contributor.author |
Hofmeyr, G.J. Greg
|
|
dc.contributor.author |
Probert, Rachel
|
|
dc.contributor.author |
Connan, Maelle
|
|
dc.contributor.author |
Buhrmann, Corrine A.
|
|
dc.contributor.author |
Gridley, Tess
|
|
dc.date.accessioned |
2023-02-27T12:46:53Z |
|
dc.date.issued |
2023 |
|
dc.description.abstract |
In-air sounds of pinnipeds are important for interactions with conspecifics and threat displays. However, little is known about the in-air acoustic repertoire and associated behaviour of crabeater seals Lobodon carcinophaga. We investigated the in-air acoustic repertoire and associated behaviour of two male and one female wild juvenile crabeater seals that beached separately, and were rehabilitated in Durban and Gqeberha, South Africa. In-air sounds were visually identified and categorised into five classes validated via random forest model classification: brief, intermediate, and long moan calls, croaks, and hisses. Hisses were common (n = 25,105 sounds from 136 hrs of acoustic recordings) and detected during heightened arousal states and interactions with animal care staff and a conspecific. Furthermore, hisses were also recorded in low arousal states during exhalation. Moan calls (n = 241) were only detected from two of the three seals. During rehabilitation, the female seal ceased producing moan calls and later produced a series of croaks (n = 204). Acoustic characteristics of in-air moan calls differed from published underwater moan calls according to duration, minimum, and maximum frequencies, and pulse repetition rate. Our study shows that the in-air acoustic repertoire and associated behaviour of these Antarctic seals are dynamic, vary inter-individually and are context dependent. |
en_US |
dc.description.department |
Mammal Research Institute |
en_US |
dc.description.department |
Zoology and Entomology |
en_US |
dc.description.embargo |
2023-08-18 |
|
dc.description.librarian |
hj2023 |
en_US |
dc.description.uri |
https://www.tandfonline.com/loi/tbio20 |
en_US |
dc.identifier.citation |
Fannie W. Shabangu, G. J. Greg Hofmeyr, Rachel Probert, Maëlle Connan,
Corrine A. Buhrmann & Tess Gridley (2023) In-air acoustic repertoire and associated behaviour
of wild juvenile crabeater seals during rehabilitation, Bioacoustics, 32:3, 261-283, DOI:
10.1080/09524622.2022.2108145. |
en_US |
dc.identifier.issn |
0952-4622 |
|
dc.identifier.other |
10.1080/09524622.2022.2108145 |
|
dc.identifier.uri |
https://repository.up.ac.za/handle/2263/89858 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Taylor and Francis |
en_US |
dc.rights |
© 2022 Informa UK Limited, trading as Taylor & Francis Group. This is an electronic version of an article published in Bioacoustics, vol. 32, no. 3, pp. 261-283, 2023. doi : 10.1080/09524622.2022.2108145. Bioacoustics is available online at : http://www.tandfonline.comtoc/tbio20. |
en_US |
dc.subject |
Acoustic behaviour |
en_US |
dc.subject |
Crabeater seals (Lobodon carcinophaga) |
en_US |
dc.subject |
Antarctic pinnipeds |
en_US |
dc.subject |
Acoustic repertoire |
en_US |
dc.subject |
In-air sounds |
en_US |
dc.subject |
South Africa (SA) |
en_US |
dc.title |
In-air acoustic repertoire and associated behaviour of wild juvenile crabeater seals during rehabilitation |
en_US |
dc.type |
Postprint Article |
en_US |