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Synchronized group association in little penguins, Eudyptula Minor.

Daniel, T., Chiaradia, A., Logan, M., Quinn, Gerald and Reina, R. 2007, Synchronized group association in little penguins, Eudyptula Minor., Animal behaviour, vol. 74, no. 5, pp. 1241-1248, doi: 10.1016/j.anbehav.2007.01.029.

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Title Synchronized group association in little penguins, Eudyptula Minor.
Author(s) Daniel, T.
Chiaradia, A.
Logan, M.
Quinn, Gerald
Reina, R.
Journal name Animal behaviour
Volume number 74
Issue number 5
Start page 1241
End page 1248
Publisher Baillière, Tindall and Cassell [etc.].
Place of publication London, England
Publication date 2007-11
ISSN 0003-3472
1095-8282
Keyword(s) Attendance pattern
Eudyptula minor
Group association
Little penguin
Synchronized parade
Summary Most seabirds form groups on land and at sea, but there is little information whether seabird groups are formed deliberately or randomly. We investigated whether little penguins formed groups composed of the same individuals when they crossed the beach each day over four breeding seasons (2001–2004) using an automated penguin monitoring system (APMS). We used an association matrix to determine the number of times any two birds crossed the APMS in the same group. The number of these group associations or ‘synchronized parade’ behaviour was determined for every possible pair of individuals, giving a total association value for each pair of birds during the postguard stage of the reproductive cycle. We concluded that a penguin group was composed of 5–10 individuals within 40-s intervals. Penguin groups were formed nonrandomly in years of high breeding success (2002 and 2003), but not in years of low breeding success (2001 and 2004). Age of birds was a significant factor in composition of groups. Little penguins with higher association values shared similar characteristics or ‘quality’, which in turn may increase the functional efficiency of their groups, especially if they are also foraging together. However, low association indices indicated that seeking the same associates was not a priority. It is costly for any animal to synchronize their attendance with the same individuals, so it could be beneficial to display synchronized parade behaviour in good breeding years but it could result in intraspecific competition for food during poor breeding years.
Language eng
DOI 10.1016/j.anbehav.2007.01.029
Field of Research 060801 Animal Behaviour
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, The Association for the Study of Animal Behaviour
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007481

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