Demographic characteristics of American marten populations in Jackson Hole, Wyoming

• Main Authors: Clark, Tim W., Campbell, Thomas M., III, Hauptman, Tedd N.
• Format: Text
• Language: unknown
• Published: BYU ScholarsArchive 1989
• Subjects: American marten
• Online Access: https://scholarsarchive.byu.edu/gbn/vol49/iss4/15; https://scholarsarchive.byu.edu/context/gbn/article/3095/viewcontent/27237.pdf

Some American marten population characteristics (numbers, density, body weights, sex and age ratios, natality, mortality-survivorship, immigration-emigration, home ranges) were studied at four sites in the southern part of the Greater Yellowstone Ecosystem, Teton County, Wyoming, in 1975–1979. Ninety-eight different martens were examined. Males (n = 25) weighed 1,111 g (± 110 SD, range 875–1,235), whereas females (n = 17) averaged 743 g (± 83 SD, range 600–900). Live-trapping showed sex ratios of 1.5M:1.0F, whereas carcasses showed 3.0M:1.0F. Of 27 males that were aged, 12 (44%) were less than 1 year old and 2 were 9–10 years old. Of 10 females, 6 were less than 1 year old and 1 was 12–13 years old. The mean length of time a male was present on the major study area was 144 days (± 266 SD, range 1–1,364), and for females it was 145 days (± 45 SD, range 1–560). Home ranges for six males averaged 3.2 km2 (± 20 SD, range 0.7–5.8) on the main study area. Some management implications are given.