Foraging ecology of a winter breeder, the Fiordland penguin

Poupart, Timothee A., Waugh, Susan M., Bost, Charles A., Kato, Akiko, Miskelly, Colin M., Rogers, Karyne M. and Arnould, John P. Y. 2019, Foraging ecology of a winter breeder, the Fiordland penguin, Marine ecology progress series, vol. 614, pp. 183-197, doi: 10.3354/meps12910.

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Title Foraging ecology of a winter breeder, the Fiordland penguin
Author(s) Poupart, Timothee A.
Waugh, Susan M.
Bost, Charles A.
Kato, Akiko
Miskelly, Colin M.
Rogers, Karyne M.
Arnould, John P. Y.ORCID iD for Arnould, John P. Y.
Journal name Marine ecology progress series
Volume number 614
Start page 183
End page 197
Total pages 15
Publisher Inter-Research Science Publisher
Place of publication Oldendorf, Germany
Publication date 2019-04-04
ISSN 0171-8630
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Marine & Freshwater Biology
Environmental Sciences & Ecology
Foraging behaviour
Winter breeding
Prey encounter
Eudyptes pachyrhynchus
New Zealand
Summary © Inter-Research 2019. Breeding in most species is timed to coincide with the greatest availability of food resources to support the increased energetic needs of reproduction. Correspondingly, the majority (76%) of seabird species in temperate and polar regions breed in spring/summer, matching the peak in ocean productivity. The Fiordland penguin Eudyptes pachyrhynchus is one of only 34 seabird species worldwide that have part of their breeding cycle during the winter, and its chicks fledge when the eggs of congeneric Eudyptes species in the same region are only starting to hatch. Little is known of the foraging ecology of this species and the factors that may influence its timing of breeding. In the present study, the foraging behaviour of breeding individuals from Taumaka/Open Bay Island, New Zealand, was investigated using GPS, dive recorder and tri-axis accelerometer data loggers. In total, 35 individuals (4 males, 31 females) were tracked at sea, revealing extensive use of continental shelf slope (200−1000 m) habitat within 42 ± 5 km of the colony. Individuals foraged mostly during daylight in the epi-pelagic zone (mean modal depth 22 ± 2 m) and prey encounter events occurred in 50% of dives. Blood isotopic signatures suggest a trophic level indicative of squid consumption, supporting previous findings that winter-spawning squid are the most important prey type. The results of the present study suggest that a winter-breeding strategy by seabirds can reflect locally abundant prey resources and suitable conditions at the time for breeding.
Language eng
DOI 10.3354/meps12910
Field of Research 060201 Behavioural Ecology
060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
0602 Ecology
0608 Zoology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2019, Inter-Research
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