FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019)

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Date
2019-11-24
DOI
https://doi.org/10.5441/001/1.ht5jf68h/1
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Citation
Borrmann RM, Phillips RA, Clay TA, Garthe S. 2019. FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019). Movebank Data Repository. https://doi.org/10.5441/001/1.ht5jf68h/1
Abstract
Individual foraging site fidelity, whereby individuals repeatedly visit the same foraging areas, is widespread in nature, and likely benefits individuals through higher foraging efficiency and potentially, higher breeding success. It may arise as a consequence of habitat or resource specialisation, or alternatively, where resources are abundant or predictable, the partitioning of space might guarantee individuals exclusive foraging opportunities. We tracked seven adult great black‐backed gulls Larus marinus at a North Sea colony from early incubation to the end of the breeding season in 2016, providing a total of 1,170 foraging trips over a mean ± SD tracking period of 67 ± 16 days. There was clear spatial segregation between individuals, with almost no overlap of their core areas (50% utilisation distribution) during incubation and chick‐rearing. Core areas were relatively small and there was high repeatability (R ± SE) in foraging parameters, including initial departure direction (0.73 ± 0.11), foraging range (0.41 ± 0.14) and cumulative distance travelled (0.19 ± 0.1) throughout the breeding season. Despite the low spatial overlap, there was little evidence of differential habitat use by individuals. The near‐exclusive individual foraging areas of this species, usually considered to be a generalist, indicate that where there is high resource availability throughout the breeding season and a small local population, individuals appear to adopt a territorial strategy which likely reduces intraspecific competition.
Keywords
animal foraging,animal movement,animal tracking,great black-backed gull,Larus marinus,movement ecology,seabirds,site fidelity,territoriality,Wadden Sea
Taxa
Sensors
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URI
https://datarepository.movebank.org/handle/10255/move.1004
BibTex
@misc{001/1_ht5jf68h/1,
  title = {FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019)},
  author = {Borrmann, RM and Phillips, RA and Clay, TA and Garthe, S},
  year = {2019},
  URL = {http://dx.doi.org/10.5441/001/1.ht5jf68h/1},
  doi = {doi:10.5441/001/1.ht5jf68h/1},
  publisher = {Movebank data repository}
}
RIS
TY  - DATA
ID  - doi:10.5441/001/1.ht5jf68h/1
T1  - FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019)
AU  - Borrmann, Rahel M.
AU  - Phillips, Richard A.
AU  - Clay, Thomas A.
AU  - Garthe, Stefan
Y1  - 2019/11/24
KW  - animal foraging
KW  - animal movement
KW  - animal tracking
KW  - great black-backed gull
KW  - Larus marinus
KW  - movement ecology
KW  - seabirds
KW  - site fidelity
KW  - territoriality
KW  - Wadden Sea
KW  - Larus marinus
PB  - Movebank data repository
UR  - http://dx.doi.org/10.5441/001/1.ht5jf68h/1
DO  - doi:10.5441/001/1.ht5jf68h/1
ER  -
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