Browsing USN Open Archive by Author "Janz, David M."
Now showing items 1-4 of 4
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Can concentrations of steroid hormones in brown bear hair reveal age class?
Cattet, Marc; Stenhouse, Gordon B.; Boulanger, John; Janz, David M.; Kapronczai, Luciene; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2018)Although combining genetic and endocrine data from non-invasively collected hair samples has potential to improve the conservation of threatened mammals, few studies have evaluated this opportunity. In this study, we ... -
Compatibility of preparatory procedures for the analysis of cortisol concentrations and stable isotope (δ13C, δ15N) ratios: a test on brown bear hair
Sergiel, Agnieszka; Hobson, Keith A.; Janz, David M.; Cattet, Marc; Selva, Nuria; Kapronczai, Luciene; Gryba, Chantel; Zedrosser, Andreas (Journal article; Peer reviewed, 2017)The measurement of naturally occurring glucocorticoids and stable isotopes of several elements has gained importance in wildlife studies in recent decades and opened a myriad of ecological applications. Cortisol and stable ... -
Correcting for enzyme immunoassay changes in long term monitoring studies
Wilson, Abbey E.; Sergiel, Agnieszka; Selva, Nuria; Swenson, Jon; Zedrosser, Andreas; Stenhouse, Gordon; Janz, David M. (Peer reviewed; Journal article, 2021)Enzyme immunoassays (EIAs) are a common tool for measuring steroid hormones in wildlife due to their low cost, commercial availability, and rapid results. Testing technologies improve continuously, sometimes requiring ... -
Quantifying long-term stress in brown bears with the hair cortisol concentration: a biomarker that may be confounded by rapid changes in response to capture and handling
Cattet, Marc; Macbeth, Bryan J.; Janz, David M.; Zedrosser, Andreas; Swenson, Jon; Dumond, Mathieu; Stenhouse, Gordon B. (Journal article; Peer reviewed, 2014)The measurement of cortisol in hair is becoming important in studying the role of stress in the life history, health and ecology of wild mammals. The hair cortisol concentration (HCC) is generally believed to be a reliable ...