You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Survival, Causes of Mortality, and Reproduction in the American Marten in Northeastern Oregon
Evelyn L. Bull and Thad W. Heater
Vol. 82, No. 1 (Spring, 2001), pp. 1-6
Published by: Society for Northwestern Vertebrate Biology
Stable URL: http://www.jstor.org/stable/3536640
Page Count: 6
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Survival rates, causes of mortality, and reproduction in the American marten (Martes americana) were determined in northeastern Oregon from 1994 until 1997 with radiocollared martens. The probability of survival of martens ≥9 mo old was 0.55 for 1 yr, 0.37 for 2 yr, 0.22 for 3 yr, and 0.15 for 4 yr. The mean annual probability of survival was 0.63 for 4 yr. Twenty-two of 35 radiocollared martens died. Of the 18 martens killed by predators, 8 were killed by bobcats (Lynx rufus), 4 by raptors, 4 by martens, and 2 by coyotes (Canis latrans), based on necropsies and circumstantial evidence at kills. Three martens died of exposure and 1 of collar entrapment. Of 13 reproductive efforts, 4 females weaned ≥1 kit, 8 efforts failed, and the outcome of 1 was unknown. Predation of adult females prior to weaning was the source of reproductive failure for some efforts.
Northwestern Naturalist © 2001 Society for Northwestern Vertebrate Biology