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Here we used point\u2010of\u2010care devices to measure blood levels of glucose, ketones, uric acid, and triglycerides in free\u2010ranging house finches (\n                    <jats:italic>Haemorhous mexicanus<\/jats:italic>\n                    )\u2014a common songbird in North America that has been well\u2010studied in the context of urbanization, nutrition, health, and sexual selection\u2014during winter and examined (1) repeatability of these methods for evaluating blood levels in these wild passerines, (2) intercorrelations among these measurements within individuals, (3) how blood nutritional\u2010physiology metrics related to a bird's body condition, habitat of origin (urban vs. suburban), poxvirus infection, and sex; and (4) if the expression of male sexually selected plumage coloration was linked to any of the nutritional\u2010physiological metrics. All blood\u2010nutritional parameters were repeatable. Also, there was significant positive covariation between concentrations of circulating triglycerides and glucose and triglycerides and uric acid. Urban finches had higher blood glucose concentrations than suburban finches, and pox\u2010infected individuals had lower blood triglyceride concentrations than uninfected ones. Last, redder males had higher blood glucose, but lower uric acid levels. These results demonstrate that point\u2010of\u2010care devices can be useful, inexpensive ways of measuring real\u2010time variation in the nutritional physiology of wild birds.\n                  <\/jats:p>","DOI":"10.1002\/jez.2796","type":"journal-article","created":{"date-parts":[[2024,2,22]],"date-time":"2024-02-22T09:48:36Z","timestamp":1708595316000},"page":"440-449","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Using point\u2010of\u2010care devices to examine covariation among blood nutritional\u2010physiological parameters and their relationships with poxvirus infection, habitat urbanization, and male plumage coloration in house finches (\n                    <i>Haemorhous mexicanus<\/i>\n                    )"],"prefix":"10.1002","volume":"341","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5196-6620","authenticated-orcid":false,"given":"Kevin J.","family":"McGraw","sequence":"first","affiliation":[{"name":"School of Life Sciences Arizona State University Tempe Arizona USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9036-3862","authenticated-orcid":false,"given":"Victor Aguiar","family":"de Souza Penha","sequence":"additional","affiliation":[{"name":"School of Life Sciences Arizona State University Tempe Arizona USA"},{"name":"Organismal and Evolutionary Research Programme University of Helsinki Helsinki Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,2,22]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1086\/322932"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1420-9101.2002.00462.x"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.2337\/db10-0916"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1093\/beheco\/arv055"},{"key":"e_1_2_9_6_1","unstructured":"Barton K.(2019).MuMIn: Multi\u2010Model Inference. 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