Document Detail

Comparison of three fecal steroid metabolites for pregnancy detection used with single sampling in bighorn sheep (Ovis canadensis).
MedLine Citation:
PMID:  15362827     Owner:  NLM     Status:  MEDLINE    
We conpared three fecal steroid metabolite assays for their usefulness in detecting pregnalcy among free-ranging Rocky Mountain bighorn sheep (Ovis canadensis canadensis) from Bighorn Canyon National Recreation Area, Wyoming and Montana (USA) and captive bighorn ewes at ZooMontana in Billings, Montana. Fecal samples were collected from 11 free-ranging, radio-collared bighorn ewes in late January-May 2001 and from 20 free-ranging, radio-collared ewes in late March to mid-May 2002. Free-ranging ewes were monitored the following spring to determine whether or not they lambed. In addition, two captive ewes were studied at ZooMontana. With three exceptions, free-ranging bighorn ewes that produced lambs had nonspecific progesterone metabolite (iPdG) levels of >1800 ng/g feces and iPdG levels >7000 ng/gm feces when samples were collected between early March and mid-May. Samples collected earlier in the year were inconclusive. One false negative was suspected to be the result of sample collection error. Of the captive ewes, nonspecific pregnanediol-3alpha-glucuronide (PdG) and iPdG followed a predictable curve over the course of the 180-day pregnancies. We conclude that estrone conjugates are not useful in diagnosing pregnancy; however, fecal steroid analysis of PdG and iPdG can be used to accurately determine pregnancy and reproductive function in bighorn sheep. This holds great potential as a noninvasive technique for understanding the role of reproductive disease in wild bighom sheep.
Kathryn A Schoenecker; Robin O Lyda; Jay Kirkpatrick
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of wildlife diseases     Volume:  40     ISSN:  0090-3558     ISO Abbreviation:  J. Wildl. Dis.     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-09-14     Completed Date:  2005-02-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0244160     Medline TA:  J Wildl Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  273-81     Citation Subset:  IM    
United States Geological Survey-Biological Resources Discipline, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, Colorado 80526-8118, USA.
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MeSH Terms
Animals, Wild
Animals, Zoo
Biological Markers / analysis
Feces / chemistry*
Pregnancy Tests / methods,  veterinary*
Pregnancy, Animal / metabolism*
Pregnanediol / analogs & derivatives*,  analysis
Progesterone / analysis*
Sensitivity and Specificity
Sheep, Bighorn / metabolism,  physiology*
Reg. No./Substance:
0/Biological Markers; 1852-49-9/pregnanediol-3 alpha-glucuronide; 26445-07-8/Pregnanediol; 57-83-0/Progesterone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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