Trade-offs, condition dependence and stopover site selection by migrating sandpipers
Western sandpipers Calidris mauri on southward migration fly over the Gulf of Alaska to the Strait of Georgia, British Columbia, where they stop for a few days to replenish reserves before continuing. In the Strait, individuals captured on the extensive tidal mudflats of the Fraser estuary (∼25000 h...
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ftunivwagenin:oai:library.wur.nl:wurpubs/375575 2024-02-04T09:59:25+01:00 Trade-offs, condition dependence and stopover site selection by migrating sandpipers Ydenberg, R.C. Butler, R.W. Lank, D.B. Guglielmo, C.G. Lemon, M. Wolf, N. 2002 application/pdf https://research.wur.nl/en/publications/trade-offs-condition-dependence-and-stopover-site-selection-by-mi https://doi.org/10.1034/j.1600-048X.2002.330108.x en eng https://edepot.wur.nl/600 https://research.wur.nl/en/publications/trade-offs-condition-dependence-and-stopover-site-selection-by-mi doi:10.1034/j.1600-048X.2002.330108.x info:eu-repo/semantics/restrictedAccess Wageningen University & Research Journal of Avian Biology 33 (2002) 1 ISSN: 0908-8857 body-mass british-columbia calidris-alpina coast long-distance migrant raptor predation risk sex-ratio spring migration western sandpipers info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2002 ftunivwagenin https://doi.org/10.1034/j.1600-048X.2002.330108.x 2024-01-10T23:27:27Z Western sandpipers Calidris mauri on southward migration fly over the Gulf of Alaska to the Strait of Georgia, British Columbia, where they stop for a few days to replenish reserves before continuing. In the Strait, individuals captured on the extensive tidal mudflats of the Fraser estuary (∼25000 ha) are significantly heavier (2.71 g, or >10% of lean body mass) than those captured on the small (<100 ha) mudflat of nearby Sidney Island. Previous work has shown that the difference cannot be attributed to seasonal timing, size, age or gender effects, and here we compare predictions made by six hypotheses about a diverse set of data to explain why, partway through a migratory journey of ∼10000 km, birds have such different body masses at two stopover sites within 40 km of each other. The ‘trade-off’ hypothesis – that the large Fraser estuary offers safety from predators, but a lower fattening rate, while the small Sidney Island site is more dangerous, but offers a higher fattening rate – made six successful predictions, all of which were upheld by the data. All other hypotheses failed at least one prediction. We infer that calidrid sandpipers arriving in the Strait of Georgia with little fat remaining (and therefore low body mass) choose to take advantage of the high feeding rate at small sites like Sidney Island because they are less vulnerable to avian predators than are individuals with higher fat reserves, who instead elect to feed at large open sites like the Fraser estuary mudflats. Article in Journal/Newspaper Calidris alpina Alaska Wageningen UR (University & Research Centre): Digital Library Gulf of Alaska Journal of Avian Biology 33 1 47 55 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
body-mass british-columbia calidris-alpina coast long-distance migrant raptor predation risk sex-ratio spring migration western sandpipers |
spellingShingle |
body-mass british-columbia calidris-alpina coast long-distance migrant raptor predation risk sex-ratio spring migration western sandpipers Ydenberg, R.C. Butler, R.W. Lank, D.B. Guglielmo, C.G. Lemon, M. Wolf, N. Trade-offs, condition dependence and stopover site selection by migrating sandpipers |
topic_facet |
body-mass british-columbia calidris-alpina coast long-distance migrant raptor predation risk sex-ratio spring migration western sandpipers |
description |
Western sandpipers Calidris mauri on southward migration fly over the Gulf of Alaska to the Strait of Georgia, British Columbia, where they stop for a few days to replenish reserves before continuing. In the Strait, individuals captured on the extensive tidal mudflats of the Fraser estuary (∼25000 ha) are significantly heavier (2.71 g, or >10% of lean body mass) than those captured on the small (<100 ha) mudflat of nearby Sidney Island. Previous work has shown that the difference cannot be attributed to seasonal timing, size, age or gender effects, and here we compare predictions made by six hypotheses about a diverse set of data to explain why, partway through a migratory journey of ∼10000 km, birds have such different body masses at two stopover sites within 40 km of each other. The ‘trade-off’ hypothesis – that the large Fraser estuary offers safety from predators, but a lower fattening rate, while the small Sidney Island site is more dangerous, but offers a higher fattening rate – made six successful predictions, all of which were upheld by the data. All other hypotheses failed at least one prediction. We infer that calidrid sandpipers arriving in the Strait of Georgia with little fat remaining (and therefore low body mass) choose to take advantage of the high feeding rate at small sites like Sidney Island because they are less vulnerable to avian predators than are individuals with higher fat reserves, who instead elect to feed at large open sites like the Fraser estuary mudflats. |
format |
Article in Journal/Newspaper |
author |
Ydenberg, R.C. Butler, R.W. Lank, D.B. Guglielmo, C.G. Lemon, M. Wolf, N. |
author_facet |
Ydenberg, R.C. Butler, R.W. Lank, D.B. Guglielmo, C.G. Lemon, M. Wolf, N. |
author_sort |
Ydenberg, R.C. |
title |
Trade-offs, condition dependence and stopover site selection by migrating sandpipers |
title_short |
Trade-offs, condition dependence and stopover site selection by migrating sandpipers |
title_full |
Trade-offs, condition dependence and stopover site selection by migrating sandpipers |
title_fullStr |
Trade-offs, condition dependence and stopover site selection by migrating sandpipers |
title_full_unstemmed |
Trade-offs, condition dependence and stopover site selection by migrating sandpipers |
title_sort |
trade-offs, condition dependence and stopover site selection by migrating sandpipers |
publishDate |
2002 |
url |
https://research.wur.nl/en/publications/trade-offs-condition-dependence-and-stopover-site-selection-by-mi https://doi.org/10.1034/j.1600-048X.2002.330108.x |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Calidris alpina Alaska |
genre_facet |
Calidris alpina Alaska |
op_source |
Journal of Avian Biology 33 (2002) 1 ISSN: 0908-8857 |
op_relation |
https://edepot.wur.nl/600 https://research.wur.nl/en/publications/trade-offs-condition-dependence-and-stopover-site-selection-by-mi doi:10.1034/j.1600-048X.2002.330108.x |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1034/j.1600-048X.2002.330108.x |
container_title |
Journal of Avian Biology |
container_volume |
33 |
container_issue |
1 |
container_start_page |
47 |
op_container_end_page |
55 |
_version_ |
1789964207478800384 |