Brood patch and sex-ratio observations indicate breeding provenance and timing in New Zealand storm petrel (Fregetta maoriana).

Rayner, M. J., Gaskin, C. P., Stephenson, B., Fitzgerald, N. B., Landers, T. J., Robertson, B., Scofield, R. P., Ismar, Stefanie M. H. and Imber, M. J. (2013) Brood patch and sex-ratio observations indicate breeding provenance and timing in New Zealand storm petrel (Fregetta maoriana). Open Access Marine Ornithology, 41 . pp. 107-111.

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Abstract

We used measurements of brood patch and moult status to estimate the breeding phenology of New Zealand Storm-Petrel, using birds caught at sea within the Hauraki Gulf Marine Park near Auckland, New Zealand. Birds caught October–January had completely downy brood patches, whereas birds caught February–April had bare brood patches with an observed male bias in the February sex-ratio, consistent with a female pre-laying exodus typical of petrels and with the existence of an unknown colony in the region. No birds captured exhibited primary moult, which is known to occur in storm-petrels during their non-breeding season. Our data support the conclusion that the New Zealand storm-petrel breeds during January–June in northern New Zealand and that field surveys for the species on offshore islands in this region during this period are warranted

Document Type: Article
Keywords: at-sea captures, breeding phenology, Fregetta maoriana, Hauraki Gulf, moult phenology, New Zealand Storm-Petrel
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
Open Access Journal?: Yes
ISSN: 2074-1235
Date Deposited: 27 Aug 2013 12:22
Last Modified: 10 Oct 2017 08:52
URI: http://oceanrep.geomar.de/id/eprint/21933

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