Show simple item record

dc.contributor.authorFrankish, Caitlin K.
dc.contributor.authorManica, Andrea
dc.contributor.authorPhillips, Richard A.
dc.date.accessioned2021-02-06T16:16:19Z
dc.date.available2021-02-06T16:16:19Z
dc.date.issued2020-02-07
dc.date.submitted2019-11-05
dc.identifier.others40462-020-0194-0
dc.identifier.other194
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/317266
dc.description.abstractAbstract: Background: Foraging performance is widely hypothesized to play a key role in shaping age-specific demographic rates in wild populations, yet the underlying behavioral changes are poorly understood. Seabirds are among the longest-lived vertebrates, and demonstrate extensive age-related variation in survival, breeding frequency and success. The breeding season is a particularly critical phase during the annual cycle, but it remains unclear whether differences in experience or physiological condition related to age interact with the changing degree of the central-place constraint in shaping foraging patterns in time and space. Methods: Here we analyze tracking data collected over two decades from congeneric black-browed (BBA) and grey-headed (GHA) albatrosses, Thalassarche melanophris and T. chrysostoma, breeding at South Georgia. We compare the foraging trip parameters, at-sea activity (flights and landings) and habitat preferences of individuals aged 10–45 years and contrast these patterns between the incubation and early chick-rearing stages. Results: Young breeders of both species showed improvements in foraging competency with age, reducing foraging trip duration until age 26. Thereafter, there were signs of foraging senescence; older adults took gradually longer trips, narrowed their habitat preference (foraging within a smaller range of sea surface temperatures) (GHA), made fewer landings and rested on the water for longer (BBA). Some age-specific effects were apparent for each species only in certain breeding stages, highlighting the complex interaction between intrinsic drivers in determining individual foraging strategies. Conclusions: Using cross-sectional data, this study highlighted clear age-related patterns in foraging behavior at the population-level for two species of albatrosses. These trends are likely to have important consequences for the population dynamics of these threatened seabirds, as young or old individuals may be more vulnerable to worsening environmental conditions.
dc.languageen
dc.publisherBioMed Central
dc.rightsAttribution 4.0 International (CC BY 4.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectResearch
dc.subjectAging
dc.subjectSeabird
dc.subjectSenescence
dc.subjectForaging behavior
dc.titleEffects of age on foraging behavior in two closely related albatross species
dc.typeArticle
dc.date.updated2021-02-06T16:16:18Z
prism.issueIdentifier1
prism.publicationNameMovement Ecology
prism.volume8
dc.identifier.doi10.17863/CAM.64379
dcterms.dateAccepted2020-01-23
rioxxterms.versionofrecord10.1186/s40462-020-0194-0
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidFrankish, Caitlin K. [0000-0002-4930-6153]
dc.identifier.eissn2051-3933
pubs.funder-project-idNatural Environment Research Council (NE/L002507/1)


Files in this item

Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's licence is described as Attribution 4.0 International (CC BY 4.0)