We analyzed plasma protein profiles in an attempt to identify physiological parameters associated with pregnancy in black bears (Ursus americanus) that might be used as early confirmation of this reproductive state. We collected serial blood samples from 2 animals over 3 consecutive fall periods. Both females were pregnant during the 1st and 3rd years; cubs from the 1st litters were removed early so females were in a non- pregnant, anestrus state during the 2nd year. We qualitatively analyzed the plasma proteins using polyacrylamide gel electrophoresis. Several distinct differences were apparent between samples from pregnant and non-pregnant animals and the protein profile changed during pregnancy as the time of implantation approached. Results suggest that 1 or more plasma proteins are associated with early stages of pregnancy in the black bear.
- Volume 6
- Issue
- Pages 223-226
- Publication Date 1 January 1986
- DOI 10.2307/3872829
- File Size 497.36 KB
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