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Assessing migratory connectivity for a long-distance migratory bird using multiple intrinsic markers

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dc.contributor.author Rushing, Clark Sawyer en
dc.contributor.author Ryder, Thomas B. en
dc.contributor.author Saracco, James Frederick en
dc.contributor.author Marra, Peter P. en
dc.date.accessioned 2015-04-20T15:15:45Z
dc.date.available 2015-04-20T15:15:45Z
dc.date.issued 2014
dc.identifier.citation Rushing, Clark Sawyer, Ryder, Thomas B., Saracco, James Frederick, and Marra, Peter P. 2014. "Assessing migratory connectivity for a long-distance migratory bird using multiple intrinsic markers." <em>Ecological Applications</em>. 24 (3):445&ndash;456. <a href="https://doi.org/10.1890/13-1091.1">https://doi.org/10.1890/13-1091.1</a> en
dc.identifier.issn 1051-0761
dc.identifier.uri http://hdl.handle.net/10088/25505
dc.description.abstract Patterns of migratory connectivity are a vital yet poorly understood component of the ecology and evolution of migratory birds. Our ability to accurately characterize patterns of migratory connectivity is often limited by the spatial resolution of the data but recent advances in probabilistic assignment approaches have begun pairing stable isotopes with other sources of data (e.g., genetic and mark-recapture) to improve the accuracy and precision of inferences based on a single marker. Here, we combine stable isotopes and geographic variation in morphology (wing length) to probabilistically assign Wood thrush (Hylocichla mustilena) captured on the wintering grounds to breeding locations. In addition, we use known origin samples to validate our model and assess potentially important impacts of covariates of isotopic and morphological data (age, sex and breeding location). Our results show that despite relatively high levels of mixing across their breeding and non-breeding ranges, moderate levels of migratory connectivity along an east-west gradient exist. In addition, combining stable isotopes with geographic variation in wing improved the precision of breeding assignments by 10% and 37% compared to assignments based on isotopes alone or wing length alone, respectively. These results demonstrate that geographical variation in morphological traits can greatly improve estimates of migratory connectivity when combined with other intrinsic markers (e.g., stable isotopes or genetic data). The wealth of morphological data available from museum specimens across the world represents a tremendously valuable, but largely untapped, resource that is widely applicable for quantifying patterns of migratory connectivity. en
dc.relation.ispartof Ecological Applications en
dc.title Assessing migratory connectivity for a long-distance migratory bird using multiple intrinsic markers en
dc.type Journal Article en
dc.identifier.srbnumber 116995
dc.identifier.doi 10.1890/13-1091.1
rft.jtitle Ecological Applications
rft.volume 24
rft.issue 3
rft.spage 445
rft.epage 456
dc.description.SIUnit NZP en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 445
dc.citation.epage 456

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