Data from: High foraging site fidelity and spatial segregation among individual great black-backed gulls

When using this dataset, please cite the original article.

Borrmann RM, Phillips RA, Clay TA, Garthe S (2019) High foraging site fidelity and spatial segregation among individual great black-backed gulls. Journal of Avian Biology: e02156. doi:10.1111/jav.02156

Additionally, please cite the Movebank data package:

Borrmann RM, Phillips RA, Clay TA, Garthe S (2019) Data from: High foraging site fidelity and spatial segregation among individual great black-backed gulls. Movebank Data Repository. doi:10.5441/001/1.ht5jf68h
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Package Identifier doi:10.5441/001/1.ht5jf68h  
 
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,

FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019) View File Details
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To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data.  



FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019)-reference-data View File Details
Download: README.txt ( 12.00Kb )
Download: FTZ_ Foraging site fidelity and spatial segregation in great black-backed gulls (data from Borrmann et al. 2019)-reference-data.csv ( 2.029Kb )
To the extent possible under law, the authors have waived all copyright and related or neighboring rights to this data.  


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