Patterns of Testicular Activity in Captive and Wild Canada Lynx (Lynx Canadensis) ⇑ Kerry V
General and Comparative Endocrinology 169 (2010) 210–216 Contents lists available at ScienceDirect General and Comparative Endocrinology journal homepage: www.elsevier.com/locate/ygcen Patterns of testicular activity in captive and wild Canada lynx (Lynx canadensis) ⇑ Kerry V. Fanson a,b,f, , Nadja C. Wielebnowski b, Tanya M. Shenk c, Walter J. Jakubas d, John R. Squires e, Jeffrey R. Lucas f a Department of Brain, Behaviour, and Evolution, Macquarie University, 209 Culloden Road, Marsfield, NSW 2122, Australia b Department of Conservation Science, Chicago Zoological Society, 3300 Golf Road, Brookfield, IL 60513, USA c Mammals Research, Colorado Division of Wildlife, 317 West Prospect, Fort Collins, CO 80526, USA d Maine Department of Inland Fisheries and Wildlife, 650 State Street, Bangor, ME 04401, USA e Rocky Mountain Research Station, Forestry Sciences Laboratory, 800 E. Beckwith Avenue, Missoula, MT 59808, USA f Department of Biological Sciences, Purdue University, 915 W. State Street, West Lafayette, IN 47907, USA article info abstract Article history: Canada lynx are listed as a threatened species in the contiguous US. Understanding the reproductive Received 4 May 2010 characteristics (i.e., mating system, behavior, physiology) of a species is useful for ensuring effective Revised 29 August 2010 in situ and ex situ management plans. The goal of this study was to describe patterns of androgen expres- Accepted 1 September 2010 sion in both captive and wild male Canada lynx using fecal hormone metabolite analysis. Among captive Available online 7 September 2010 lynx, juvenile and castrated males had lower concentrations of fecal androgens (fA) than intact males, thereby demonstrating that the assay detects biologically meaningful differences in testicular activity.
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