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Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand

Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand

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Prüfsumme: MD5:302447ff806f94682795786de693961b

MACHOVSKY-CAPUSKA, Gabriel E., Mark E. HAUBER, Mariela DASSIS, Eric. LIBBY, Rob SCHUCKARD, Martin WIKELSKI, David S. MELVILLE, Willie COOK, Michelle HOUSTON, David RAUBENHEIMER, 2014. Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand. In: Journal of Ornithology. 155(2), pp. 379-387. ISSN 2193-7192. eISSN 2193-7206. Available under: doi: 10.1007/s10336-013-1018-4

@article{MachovskyCapuska2014Forag-30711, title={Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand}, year={2014}, doi={10.1007/s10336-013-1018-4}, number={2}, volume={155}, issn={2193-7192}, journal={Journal of Ornithology}, pages={379--387}, author={Machovsky-Capuska, Gabriel E. and Hauber, Mark E. and Dassis, Mariela and Libby, Eric. and Schuckard, Rob and Wikelski, Martin and Melville, David S. and Cook, Willie and Houston, Michelle and Raubenheimer, David} }

Houston, Michelle Raubenheimer, David Melville, David S. Libby, Eric. Houston, Michelle Cook, Willie Machovsky-Capuska, Gabriel E. Nahrungssuchverhalten und Habitatnutzung Australischer Tölpel während der Jungenaufzucht in Neuseeland Machovsky-Capuska, Gabriel E. eng Dassis, Mariela Wikelski, Martin Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand Schuckard, Rob Schuckard, Rob Hauber, Mark E. Raubenheimer, David 2014 Patchily distributed marine pelagic prey present considerable challenges to predatory seabirds, including Gannets (Morus spp.) departing from large breeding colonies. Here, for the first time, we used GPS data loggers to provide detailed spatial, temporal, and habitat metrics of chick-rearing Australasian Gannets (Morus serrator) foraging behaviours from two distant colonies in New Zealand. Our goal was to examine the extent to which Gannet foraging tactics vary across disparate habitats, and determine whether the observed differences are consistent with predictions derived from foraging studies of other gannet species. Foraging trip performance was highly consistent between colonies, and sexes, and no significant differences in any of the variables analyzed were observed. However, Gannets from Farewell Spit (FS) dove in shallower waters (0–50 m) than birds from Cape Kidnappers (CK, >50 m), which is consistent with previous dietary studies suggesting that FS Gannets feed mainly on coastal prey, whereas CK birds feed on species with a more oceanic distribution. Diving frequencies were similar in the two colonies suggesting that Gannets were foraging in habitats with similar levels of food availability. Further studies are needed to understand the relationship between prey availability, oceanography and geographic features, to better interpret foraging tactics of Australasian Gannets. Melville, David S. Cook, Willie Libby, Eric. 2015-04-10T09:05:41Z Dassis, Mariela Wikelski, Martin Hauber, Mark E. 2015-04-10T09:05:41Z

Dateiabrufe seit 10.04.2015 (Informationen über die Zugriffsstatistik)

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