Dataset Information

Flying south: Foraging locations of the Hutton's shearwater (Puffinus huttoni) revealed by Time-Depth Recorders and GPS tracking.

ABSTRACT: The Hutton's shearwater Puffinus huttoni is an endangered seabird endemic to Kaik?ura, New Zealand, but the spatial and temporal aspects of its at-sea foraging behavior are not well known.To identify foraging areas and estimate trip durations, we deployed Global Positioning Systems (GPS) devices and Time-Depth Recorders (TDR) on 26 adult Hutton's shearwaters during the chick-rearing period in 2017 and 2018.We found Hutton's shearwaters traveled much further from their breeding grounds at Kaik?ura than previously considered, with most individuals foraging in coastal and oceanic areas 125-365 km south and near Banks Peninsula. Trip durations varied from 1 to 15 days (mean = 5 days), and total track lengths varied from 264 to 2,157 km (mean = 1092.9 km).Although some diving occurred in near-shore waters near the breeding colony, most foraging was concentrated in four regions south of Kaik?ura. Dive durations averaged 23.2 s (range 8.1 to 71.3 s) and dive depths averaged 7.1 m (range 1.5 to 30 m). Foraging locations had higher chlorophyll a levels and shallower water depths than nonforaging locations. Birds did not feed at night, but tended to raft in areas with deeper water than foraging locations.Mapping the spatial and temporal distribution of Hutton's shearwaters at sea will be fundamental to their conservation, as it can reveal potential areas of overlap with fisheries and other industrial users of the marine environment.

SUBMITTER: Bennet DG

PROVIDER: S-EPMC6662427 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Flying south: Foraging locations of the Hutton's shearwater (<i>Puffinus huttoni</i>) revealed by Time-Depth Recorders and GPS tracking.

Bennet Della G DG Horton Travis W TW Goldstien Sharyn J SJ Rowe Lindsay L Briskie James V JV

Ecology and evolution 20190628 14

The Hutton's shearwater <i>Puffinus huttoni</i> is an endangered seabird endemic to Kaikōura, New Zealand, but the spatial and temporal aspects of its at-sea foraging behavior are not well known.To identify foraging areas and estimate trip durations, we deployed Global Positioning Systems (GPS) devices and Time-Depth Recorders (TDR) on 26 adult Hutton's shearwaters during the chick-rearing period in 2017 and 2018.We found Hutton's shearwaters traveled much further from their breeding grounds at ...[more]

PMID: 31380060

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Dataset Information

Flying south: Foraging locations of the Hutton's shearwater (Puffinus huttoni) revealed by Time-Depth Recorders and GPS tracking.

Publications

Flying south: Foraging locations of the Hutton's shearwater (<i>Puffinus huttoni</i>) revealed by Time-Depth Recorders and GPS tracking.

Similar Datasets

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