Estimating Population Trends in American Woodcock (Scolopax Minor) Using Population Reconstruction Models

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dc.contributor.advisorBowerman, William Wen_US
dc.contributor.authorWest, Brent Hopkinsen_US
dc.contributor.departmentEnvironmental Science and Technologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2016-06-22T06:15:33Z
dc.date.available2016-06-22T06:15:33Z
dc.date.issued2016en_US
dc.description.abstractThe American woodcock (Scolopax minor) population index in North America has declined 0.9% a year since 1968 prompting managers to identify priority information and management needs for the species (Sauer et al 2008). Managers identified a need for a population model that better informs on the status of American woodcock populations (Case et al. 2010). Population reconstruction techniques use long-term age-at-harvest data and harvest effort to estimate abundances with error estimates. Four new models were successfully developed using survey data (1999 to 2013). The optimal model estimates sex specific harvest probability for adult females at 0.148 (SE = 0.017) and all other age-sex cohorts at 0.082 (SE = 0.008) for the most current year 2013. The model estimated a yearly survival rate of 0.528 (SE = 0.008). Total abundance ranged from 5,206,000 woodcock in 2007 to 6,075,800 woodcock in 1999. This study represents the first population estimates of woodcock populations.en_US
dc.identifierhttps://doi.org/10.13016/M2520W
dc.identifier.urihttp://hdl.handle.net/1903/18391
dc.language.isoenen_US
dc.subject.pqcontrolledWildlife managementen_US
dc.subject.pqcontrolledWildlife conservationen_US
dc.subject.pqcontrolledEcologyen_US
dc.subject.pquncontrolledHuntingen_US
dc.subject.pquncontrolledPopulationen_US
dc.subject.pquncontrolledWoodcocken_US
dc.titleEstimating Population Trends in American Woodcock (Scolopax Minor) Using Population Reconstruction Modelsen_US
dc.typeThesisen_US

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