학술논문
Quantifying habitat use in satellite-tracked pelagic seabirds: application of kernel estimation to albatross locations.
Document Type
Article
Author
Source
Subject
*SEA birds
*ARTIFICIAL satellites in oceanography
*
Language
ISSN
0908-8857
Abstract
We develop a new approach to quantifying habitat use within the foraging ranges of satellite-tracked seabirds. We applied kernel estimation techniques to 167 days (3738 location) of data from Black-browed and Grey-headed albatrosses Diomedea melanophris and D. chrysostoma during the chick-rearing period of the breeding cycle at South Georgia. At this time the activity range of these two species covers an estimated 440000 and 640000 km[SUP2], respectively, with very substantial overlap. In contrast, kernel estimation reveals that the main foraging areas of these two sympatric, congeneric species are very distinct. Based on location density categories accounting for 50% of locations, the foraging areas cover c. 81500 and c. 119700 km[SUP2], respectively. With 42% and 50% of the range of one species overlapping with that of the other. [ABSTRACT FROM AUTHOR]