Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Plasma metabolites and creatine kinase levels of shorebirds during fall migration in the Prairie Pothole Region - Metabolitos del Plasma y Niveles de Creatina Quinasa en Aves Playeras durante la Migración de Otoño en la Región de Prairie Pothole

Metabolitos del Plasma y Niveles de Creatina Quinasa en Aves Playeras durante la Migración de Otoño en la Región de Prairie Pothole
Nathan E. Thomas and David L. Swanson
The Auk
Vol. 130, No. 4 (October 2013), pp. 580-590
DOI: 10.1525/auk.2013.12169
Stable URL: http://www.jstor.org/stable/10.1525/auk.2013.12169
Page Count: 11
  • Download ($12.00)
  • Cite this Item
Item Type
Article
References
Plasma metabolites and creatine kinase levels of shorebirds during fall migration in the Prairie Pothole Region - Metabolitos del Plasma y Niveles de Creatina Quinasa en Aves Playeras durante la Migración de Otoño en la Región de Prairie Pothole
Preview not available

Abstract

Abstract Wetland habitats in the Prairie Pothole Region of North America have been greatly reduced since European settlement, but the availability of managed wetlands has increased. The relative efficacy of these two habitats for meeting energetic demands of migrating shorebirds is unknown. To assess the relative suitability of stopover sites, we measured plasma metabolites and creatine kinase in Least Sandpipers (Calidris minutilla), Semipalmated Sandpipers (C. pusilla), and Pectoral Sandpipers (C. melanotos) at natural and managed wetland sites during fall migration in northeastern South Dakota and west-central Minnesota. We used stepwise multiple regression to identify significant effectors of plasma metabolite levels, followed by analysis of covariance to compare metabolite values between birds in the two habitat types. Plasma metabolite levels generally did not differ significantly between birds in the two habitat types, with two exceptions. Plasma triglycerides of Pectoral Sandpipers were 2.6× higher at managed than at natural wetlands, suggesting higher rates of fattening at managed sites, but this was not supported by plasma glycerol levels, which did not differ significantly between birds in the two habitat types, or by body mass, which was greater for adult males in natural wetlands. Plasma creatine kinase levels of Least Sandpipers were 75% higher at managed than at natural wetlands, which suggests that repair of flight-induced muscle damage may be slower for this species at managed wetlands. The general absence of significant differences in plasma metabolites among shorebirds in the two wetland types suggests that natural and managed wetlands serve as similarly effective stopover habitat for fall-migrating shorebirds in the Prairie Pothole Region.

Page Thumbnails