Show simple item record

dc.contributor.authorJorge, Paulo E.en_US
dc.contributor.authorSowter, Daviden_US
dc.contributor.authorMarques, Paulo A. M.en_US
dc.date.accessioned2018-11-06T14:59:23Z
dc.date.available2018-11-06T14:59:23Z
dc.date.issued2011-07-20en_US
dc.identifier.othere22433en_US
dc.identifier.urihttp://hdl.handle.net/10919/85657
dc.description.abstractSome animals migrate long distances to exploit important seasonal food resources in the northern regions of the northern hemisphere, whilst avoiding winter starvation. Changes in the individual's age and navigational skills are likely to affect migration, which in turn influences the geographic distribution of individuals. Processes such as sexual maturation and navigational abilities are affected by age, and age is thus a key factor in understanding migration patterns and differences in distribution ranges. In the present study, we investigated the effects of age on the geographic distribution of a population of Lesser Black-backed Gulls Larus fuscus throughout its annual cycle, by analyzing a dataset of 19,096 records from 10,000 color-ringed gulls. In contrast to previous assumptions, the results showed that gulls were geographically segregated by age throughout the entire annual cycle, rather than showing a geographic age-related cline only in the wintering areas. This asymmetric distribution results from a reduction in the annual range of sexually mature gulls, and the differential distribution of mature and immature individuals (mature birds remained in more northern areas, compared to immature birds, throughout the annual cycle). Furthermore, although immature gulls travelled longer distances than adults, they initiated their fall migration with short movements, in contrast to adults that migrated using longer movements. The effects identified in this study explain the non-homogenous distribution of populations throughout the annual cycle, with wide implications for the development of effective human health policies and/or wildlife management strategies.en_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherPLOSen_US
dc.rightsCreative Commons Attribution 4.0 Internationalen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.titleDifferential Annual Movement Patterns in a Migratory Species: Effects of Experience and Sexual Maturationen_US
dc.typeArticle - Refereeden_US
dc.description.versionPeer Revieweden_US
dc.title.serialPLOS ONEen_US
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0022433en_US
dc.identifier.volume6en_US
dc.identifier.issue7en_US
dc.type.dcmitypeTexten_US
dc.identifier.pmid21799853en_US
dc.identifier.eissn1932-6203en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Creative Commons Attribution 4.0 International
License: Creative Commons Attribution 4.0 International