Sex recognition in brown skuas: do acoustic signals matter?
Bird vocalisations are often essential for sex recognition, especially in species that show little morphological sex dimorphism. Brown skuas (Catharacta antarctica lonnbergi), which exhibit uniform plumage across both sexes, emit three main calls: the long call, the alarm call and the contact call....
Published in: | Journal of Ornithology |
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2007
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Online Access: | https://pure.knaw.nl/portal/en/publications/023bca94-794e-46d8-b8c3-2fc3e94800b7 https://doi.org/10.1007/s10336-007-0195-4 https://hdl.handle.net/20.500.11755/023bca94-794e-46d8-b8c3-2fc3e94800b7 |
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ftknawnlpublic:oai:pure.knaw.nl:publications/023bca94-794e-46d8-b8c3-2fc3e94800b7 2024-09-15T17:41:55+00:00 Sex recognition in brown skuas: do acoustic signals matter? Janicke, T. Ritz, M.S. Hahn, S.M. Peter, H.-U. 2007 https://pure.knaw.nl/portal/en/publications/023bca94-794e-46d8-b8c3-2fc3e94800b7 https://doi.org/10.1007/s10336-007-0195-4 https://hdl.handle.net/20.500.11755/023bca94-794e-46d8-b8c3-2fc3e94800b7 eng eng https://pure.knaw.nl/portal/en/publications/023bca94-794e-46d8-b8c3-2fc3e94800b7 info:eu-repo/semantics/closedAccess Janicke , T , Ritz , M S , Hahn , S M & Peter , H-U 2007 , ' Sex recognition in brown skuas: do acoustic signals matter? ' , Journal of Ornithology , vol. 148 , no. 4 , pp. 565-569 . https://doi.org/10.1007/s10336-007-0195-4 article 2007 ftknawnlpublic https://doi.org/10.1007/s10336-007-0195-420.500.11755/023bca94-794e-46d8-b8c3-2fc3e94800b7 2024-07-22T23:43:54Z Bird vocalisations are often essential for sex recognition, especially in species that show little morphological sex dimorphism. Brown skuas (Catharacta antarctica lonnbergi), which exhibit uniform plumage across both sexes, emit three main calls: the long call, the alarm call and the contact call. We tested the potential for sex recognition in brown skua calls of 42 genetically sexed individuals by analysing 8–12 acoustic parameters in the temporal and frequency domains of each call type. For every call type, we failed to find sex differences in any of the acoustic parameters measured. Stepwise discriminant function analysis (DFA) revealed that sexes cannot be unambiguously classified, with increasing uncertainty of correct classification from contact calls to long calls to alarm calls. Consequently, acoustic signalling is probably not the key mechanism for sex recognition in brown skuas. Bird vocalisations are often essential for sex recognition, especially in species that show little morphological sex dimorphism. Brown skuas (Catharacta antarctica lonnbergi), which exhibit uniform plumage across both sexes, emit three main calls: the long call, the alarm call and the contact call. We tested the potential for sex recognition in brown skua calls of 42 genetically sexed individuals by analysing 8–12 acoustic parameters in the temporal and frequency domains of each call type. For every call type, we failed to find sex differences in any of the acoustic parameters measured. Stepwise discriminant function analysis (DFA) revealed that sexes cannot be unambiguously classified, with increasing uncertainty of correct classification from contact calls to long calls to alarm calls. Consequently, acoustic signalling is probably not the key mechanism for sex recognition in brown skuas. Article in Journal/Newspaper Antarc* Antarctica Brown Skua Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) Journal of Ornithology 148 4 565 569 |
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Open Polar |
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Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
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ftknawnlpublic |
language |
English |
description |
Bird vocalisations are often essential for sex recognition, especially in species that show little morphological sex dimorphism. Brown skuas (Catharacta antarctica lonnbergi), which exhibit uniform plumage across both sexes, emit three main calls: the long call, the alarm call and the contact call. We tested the potential for sex recognition in brown skua calls of 42 genetically sexed individuals by analysing 8–12 acoustic parameters in the temporal and frequency domains of each call type. For every call type, we failed to find sex differences in any of the acoustic parameters measured. Stepwise discriminant function analysis (DFA) revealed that sexes cannot be unambiguously classified, with increasing uncertainty of correct classification from contact calls to long calls to alarm calls. Consequently, acoustic signalling is probably not the key mechanism for sex recognition in brown skuas. Bird vocalisations are often essential for sex recognition, especially in species that show little morphological sex dimorphism. Brown skuas (Catharacta antarctica lonnbergi), which exhibit uniform plumage across both sexes, emit three main calls: the long call, the alarm call and the contact call. We tested the potential for sex recognition in brown skua calls of 42 genetically sexed individuals by analysing 8–12 acoustic parameters in the temporal and frequency domains of each call type. For every call type, we failed to find sex differences in any of the acoustic parameters measured. Stepwise discriminant function analysis (DFA) revealed that sexes cannot be unambiguously classified, with increasing uncertainty of correct classification from contact calls to long calls to alarm calls. Consequently, acoustic signalling is probably not the key mechanism for sex recognition in brown skuas. |
format |
Article in Journal/Newspaper |
author |
Janicke, T. Ritz, M.S. Hahn, S.M. Peter, H.-U. |
spellingShingle |
Janicke, T. Ritz, M.S. Hahn, S.M. Peter, H.-U. Sex recognition in brown skuas: do acoustic signals matter? |
author_facet |
Janicke, T. Ritz, M.S. Hahn, S.M. Peter, H.-U. |
author_sort |
Janicke, T. |
title |
Sex recognition in brown skuas: do acoustic signals matter? |
title_short |
Sex recognition in brown skuas: do acoustic signals matter? |
title_full |
Sex recognition in brown skuas: do acoustic signals matter? |
title_fullStr |
Sex recognition in brown skuas: do acoustic signals matter? |
title_full_unstemmed |
Sex recognition in brown skuas: do acoustic signals matter? |
title_sort |
sex recognition in brown skuas: do acoustic signals matter? |
publishDate |
2007 |
url |
https://pure.knaw.nl/portal/en/publications/023bca94-794e-46d8-b8c3-2fc3e94800b7 https://doi.org/10.1007/s10336-007-0195-4 https://hdl.handle.net/20.500.11755/023bca94-794e-46d8-b8c3-2fc3e94800b7 |
genre |
Antarc* Antarctica Brown Skua |
genre_facet |
Antarc* Antarctica Brown Skua |
op_source |
Janicke , T , Ritz , M S , Hahn , S M & Peter , H-U 2007 , ' Sex recognition in brown skuas: do acoustic signals matter? ' , Journal of Ornithology , vol. 148 , no. 4 , pp. 565-569 . https://doi.org/10.1007/s10336-007-0195-4 |
op_relation |
https://pure.knaw.nl/portal/en/publications/023bca94-794e-46d8-b8c3-2fc3e94800b7 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s10336-007-0195-420.500.11755/023bca94-794e-46d8-b8c3-2fc3e94800b7 |
container_title |
Journal of Ornithology |
container_volume |
148 |
container_issue |
4 |
container_start_page |
565 |
op_container_end_page |
569 |
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1810488198804013056 |