Monday, May 29, 2017

Sexual and individual differences in wedge-tailed shearwater (Puffinus pacificus) burrow calls and vocal recognition

TitleSexual and individual differences in wedge-tailed shearwater (Puffinus pacificus) burrow calls and vocal recognition
Publication TypeJournal Article
Year of Publication2014
AuthorsTotterman, SL
JournalNotornis
Volume61
Issue3
Pagination121-130
Type of ArticleFull Article
Abstract

Calls and playback-response behaviour of breeding wedge-tailed shearwaters (Puffinus pacificus) were studied at Muttonbird Island, Coffs Harbour, New South Wales, Australia. Burrow calls were recorded from 45 females and 60 males. Male calls averaged higher in fundamental frequency and longer in note lengths than female calls, although ranges overlapped. Playback experiments demonstrated sexual recognition, with incubating females mostly responding to female playbacks. Males responded to both female and male calls. Ratios of between- to within-subject variation suggested that individual vocal signatures could be encoded in timing and some frequency parameters. Playback experiments demonstrated a “dear enemy” effect, where shearwaters in burrows were more responsive to stranger rather than neighbour calls. Wedge-tailed shearwater calls are informative and further studies are encouraged for other southern hemisphere breeding shearwaters.

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