Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird

 

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dc.contributor.author Péron, Clara en_ZA
dc.contributor.author Grémillet, David en_ZA
dc.date.accessioned 2015-11-16T04:10:59Z
dc.date.available 2015-11-16T04:10:59Z
dc.date.issued 2013 en_ZA
dc.identifier.citation Péron, C., & Grémillet, D. (2013). Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird. PLoS One, 8(8), e72713. doi:10.1371/journal.pone.0072713 en_ZA
dc.identifier.uri http://hdl.handle.net/11427/15018
dc.identifier.uri http://dx.doi.org/10.1371/journal.pone.0072713
dc.description.abstract Seasonal long-distance migration is likely to be experienced in a contrasted manner by juvenile, immature and adult birds, leading to variations in migratory routes, timing and behaviour. We provide the first analysis of late summer movements and autumn migration in these three life stages, which were tracked concurrently using satellite tags, geolocators or GPS recorders in a long-ranging migratory seabird, the Scopoli’s shearwater (formerly named Cory’s shearwater, Calonectris diomedea ) breeding on two French Mediterranean islands. During the late breeding season, immatures foraged around their colony like breeding adults, but they were the only group showing potential prospecting movements around non-natal colonies. Global migration routes were broadly comparable between the two populations and the three life stages, with all individuals heading towards the Atlantic Ocean through the strait of Gibraltar and travelling along the West African coast, up to 8000 km from their colony. However, detailed comparison of timing, trajectory and oceanographic conditions experienced by the birds revealed remarkable age-related differences. Compared to adults and immatures, juveniles made a longer stop-over in the Balearic Sea (10 days vs 4 days in average), showed lower synchrony in crossing the Gibraltar strait, had more sinuous pathways and covered longer daily distances (240 km.d -1 vs 170 km.d -1 ). Analysis of oceanographic habitats along migratory routes revealed funnelling selection of habitat towards coastal and more productive waters with increasing age. Younger birds may have reduced navigational ability and learn progressively fine-scale migration routes towards the more profitable travelling and wintering areas. Our study demonstrates the importance of tracking long-lived species through the stages, to better understand migratory behavior and assess differential exposure to at-sea threats. Shared distribution between life stages and populations make Scopoli’s shearwaters particularly vulnerable to extreme mortality events in autumn and winter. Such knowledge is key for the conservation of critical marine habitats. en_ZA
dc.language.iso eng en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_ZA
dc.rights.uri http://creativecommons.org/licenses/by/4.0 en_ZA
dc.source PLoS One en_ZA
dc.source.uri http://journals.plos.org/plosone en_ZA
dc.subject.other Animal migration en_ZA
dc.subject.other Animal sexual behavior en_ZA
dc.subject.other Birds en_ZA
dc.subject.other Habitats en_ZA
dc.subject.other Foraging en_ZA
dc.title Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird en_ZA
dc.type Journal Article en_ZA
dc.rights.holder © 2013 Péron et al en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Percy FitzPatrick Institute of African Ornithology en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Péron, C., & Grémillet, D. (2013). Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird. <i>PLoS One</i>, http://hdl.handle.net/11427/15018 en_ZA
dc.identifier.chicagocitation Péron, Clara, and David Grémillet "Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird." <i>PLoS One</i> (2013) http://hdl.handle.net/11427/15018 en_ZA
dc.identifier.vancouvercitation Péron C, Grémillet D. Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird. PLoS One. 2013; http://hdl.handle.net/11427/15018. en_ZA
dc.identifier.ris TY - Journal Article AU - Péron, Clara AU - Grémillet, David AB - Seasonal long-distance migration is likely to be experienced in a contrasted manner by juvenile, immature and adult birds, leading to variations in migratory routes, timing and behaviour. We provide the first analysis of late summer movements and autumn migration in these three life stages, which were tracked concurrently using satellite tags, geolocators or GPS recorders in a long-ranging migratory seabird, the Scopoli’s shearwater (formerly named Cory’s shearwater, Calonectris diomedea ) breeding on two French Mediterranean islands. During the late breeding season, immatures foraged around their colony like breeding adults, but they were the only group showing potential prospecting movements around non-natal colonies. Global migration routes were broadly comparable between the two populations and the three life stages, with all individuals heading towards the Atlantic Ocean through the strait of Gibraltar and travelling along the West African coast, up to 8000 km from their colony. However, detailed comparison of timing, trajectory and oceanographic conditions experienced by the birds revealed remarkable age-related differences. Compared to adults and immatures, juveniles made a longer stop-over in the Balearic Sea (10 days vs 4 days in average), showed lower synchrony in crossing the Gibraltar strait, had more sinuous pathways and covered longer daily distances (240 km.d -1 vs 170 km.d -1 ). Analysis of oceanographic habitats along migratory routes revealed funnelling selection of habitat towards coastal and more productive waters with increasing age. Younger birds may have reduced navigational ability and learn progressively fine-scale migration routes towards the more profitable travelling and wintering areas. Our study demonstrates the importance of tracking long-lived species through the stages, to better understand migratory behavior and assess differential exposure to at-sea threats. Shared distribution between life stages and populations make Scopoli’s shearwaters particularly vulnerable to extreme mortality events in autumn and winter. Such knowledge is key for the conservation of critical marine habitats. DA - 2013 DB - OpenUCT DO - 10.1371/journal.pone.0072713 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2013 T1 - Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird TI - Tracking through life stages: adult, immature and juvenile autumn migration in a long-lived seabird UR - http://hdl.handle.net/11427/15018 ER - en_ZA


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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.