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GPS tracking devices reveal foraging strategies of black-legged kittiwakes

Journal of Ornithology

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Abstract

The Black-legged Kittiwake Rissa tridactyla is the most abundant gull species in the world, but some populations have declined in recent years, apparently due to food shortage. Kittiwakes are surface feeders and thus can compensate for low food availability only by increasing their foraging range and/or devoting more time to foraging. The species is widely studied in many respects, but long-distance foraging and the limitations of conventional radio telemetry have kept its foraging behavior largely out of view. The development of Global Positioning System (GPS) loggers is advancing rapidly. With devices as small as 8 g now available, it is possible to use this technology for tracking relatively small species of oceanic birds like kittiwakes. Here we present the first results of GPS telemetry applied to Black-legged Kittiwakes in 2007 in the North Pacific. All but one individual foraged in the neritic zone north of the island. Three birds performed foraging trips only close to the colony (within 13 km), while six birds had foraging ranges averaging about 40 km. The maximum foraging range was 59 km, and the maximum distance traveled was 165 km. Maximum trip duration was 17 h (mean 8 h). An apparently bimodal distribution of foraging ranges affords new insight on the variable foraging behaviour of Black-legged Kittiwakes. Our successful deployment of GPS loggers on kittiwakes holds much promise for telemetry studies on many other bird species of similar size and provides an incentive for applying this new approach in future studies.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
GPS tracking devices reveal foraging strategies of black-legged kittiwakes
Series title:
Journal of Ornithology
Volume
151
Issue:
2
Year Published:
2010
Language:
English
Publisher:
Springer
Publisher location:
Netherlands
Contributing office(s):
Alaska Science Center Biology MFEB
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
459
Last page:
467
Country:
United States
State:
Alaska