eCite Digital Repository

Age-related variation in foraging behaviour in the wandering albatross at South Georgia: no evidence for senescence

Citation

Froy, H and Lewis, S and Catry, P and Bishop, CM and Forster, IP and Fukuda, A and Higuchi, H and Phalan, B and Xavier, JC and Nussey, DH and Phillips, RA, Age-related variation in foraging behaviour in the wandering albatross at South Georgia: no evidence for senescence, PLoS One, 10, (1) Article e0116415. ISSN 1932-6203 (2015) [Refereed Article]


Preview
PDF
919Kb
  

Copyright Statement

Copyright 2015 The Authors Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1371/journal.pone.0116415

Abstract

Age-related variation in demographic rates is now widely documented in wild vertebrate systems, and has significant consequences for population and evolutionary dynamics. However, the mechanisms underpinning such variation, particularly in later life, are less well understood. Foraging efficiency is a key determinant of fitness, with implications for individual life history trade-offs. A variety of faculties known to decline in old age, such as muscular function and visual acuity, are likely to influence foraging performance. We examine age-related variation in the foraging behaviour of a long-lived, wide-ranging oceanic seabird, the wandering albatross Diomedea exulans. Using miniaturised tracking technologies, we compared foraging trip characteristics of birds breeding at Bird Island, South Georgia. Based on movement and immersion data collected during the incubation phase of a single breeding season, and from extensive tracking data collected in previous years from different stages of the breeding cycle, we found limited evidence for age-related variation in commonly reported trip parameters, and failed to detect signs of senescent decline. Our results contrast with the limited number of past studies that have examined foraging behaviour in later life, since these have documented changes in performance consistent with senescence. This highlights the importance of studies across different wild animal populations to gain a broader perspective on the processes driving variation in ageing rates.

Item Details

Item Type:Refereed Article
Keywords:foraging behaviour, wandering albatross, South Georgia
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal Behaviour
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
Author:Forster, IP (Mr Isaac Forster)
ID Code:122081
Year Published:2015
Web of Science® Times Cited:6
Deposited By:Centre for Ecology and Biodiversity
Deposited On:2017-10-30
Last Modified:2017-11-09
Downloads:1 View Download Statistics

Repository Staff Only: item control page