Brown pelican data from Lamb et al. (2017)

dc.contributor.authorLamb, Juliet S.
dc.contributor.authorSatgé, Yvan G.
dc.contributor.authorJodice, Patrick G.R.
dc.description.abstractDensity-dependent competition for food resources influences both foraging ecology and reproduction in a variety of animals. The relationship between colony size, local prey depletion, and reproductive output in colonial central-place foragers has been extensively studied in seabirds; however, most studies have focused on effects of in- traspecific competition during the breeding season, while little is known about whether density-dependent resource depletion influences individual migratory behavior out- side the breeding season. Using breeding colony size as a surrogate for intraspecific resource competition, we tested for effects of colony size on breeding home range, nestling health, and migratory patterns of a nearshore colonial seabird, the brown peli- can (Pelecanus occidentalis), originating from seven breeding colonies of varying sizes in the subtropical northern Gulf of Mexico. We found evidence for density-dependent effects on foraging behavior during the breeding season, as individual foraging areas increased linearly with the number of breeding pairs per colony. Contrary to our pre- dictions, however, nestlings from more numerous colonies with larger foraging ranges did not experience either decreased condition or increased stress. During nonbreed- ing, individuals from larger colonies were more likely to migrate, and traveled longer distances, than individuals from smaller colonies, indicating that the influence of density-dependent effects on distribution persists into the nonbreeding period. We also found significant effects of individual physical condition, particularly body size, on migratory behavior, which in combination with colony size suggesting that dominant individuals remain closer to breeding sites during winter. We conclude that density- dependent competition may be an important driver of both the extent of foraging ranges and the degree of migration exhibited by brown pelicans. However, the effects of density-dependent competition on breeding success and population regulation remain uncertain in this system.
dc.subjectanimal foraging
dc.subjectanimal movement
dc.subjectanimal tracking
dc.subjectavian migration
dc.subjectbrown pelican
dc.subjectmovement ecology
dc.subjectPelecanus occidentalis
dc.subjectsatellite telemetry
dc.titleBrown pelican data from Lamb et al. (2017)
dspace.entity.typeData package
dwc.ScientificNamePelecanus occidentalis
  title = {Brown pelican data from Lamb et al. (2017)},
  author = {Lamb, JS and Satgé, YG and Jodice, PGR},
  URL = {},
  doi = {doi:10.5441/001/1.7856r086/1},
  publisher = {Movebank data repository}
Lamb JS, Satgé YG, Jodice PGR. Brown pelican data from Lamb et al. (2017). Movebank Data Repository.
ID  - doi:10.5441/001/1.7856r086/1
T1  - Brown pelican data from Lamb et al. (2017)
AU  - Lamb, Juliet S.
AU  - Satgé, Yvan G.
AU  - Jodice, Patrick G.R.
KW  - animal foraging
KW  - animal movement
KW  - animal tracking
KW  - Argos
KW  - avian migration
KW  - brown pelican
KW  - movement ecology
KW  - Pelecanus occidentalis
KW  - satellite telemetry
KW  - Pelecanus occidentalis
PB  - Movebank data repository
UR  -
DO  - doi:10.5441/001/1.7856r086/1
ER  -