Offspring provisioning constrains the foraging behavior of breeding seabirds temporally and spatially. In species whose foraging grounds overlap with commercial fisheries, quantifying the provisioning behavior of breeding adults throughout the season can illuminate the nature of interactions with the fisheries and, where seabird bycatch exists, contribute to development of mitigation measures. In 2004–2005, we studied the provisioning behavior of Flesh-footed Shearwaters (Puffinus carneipes) on Lord Howe Island, Australia, using the repeated-weighing technique. Specifically, we determined (1) meal size, feeding frequency, and chick growth rates; (2) attendance behavior of adults; and (3) estimated food consumption at the individual and colony levels. Incubation shift duration averaged 9.5 ± 1.6 (SD) days. Foraging-trip duration was bimodal, with both short trips (<3 days) and long trips (>3 days) recorded. Average meal mass was greater during the late chick-rearing period and was not influenced by the time interval between meals. Developing chicks had a food conversion efficiency of 27%, with a total individual food requirement of 2,337 g to fledge successfully. An increase in the interval between provisioning events from the early to the late chick-rearing period was associated with significantly more long foraging trips by parent birds; however, there was no variation in the proportion of study birds that returned each night.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 127 • No. 1