Trend of the Yellowstone Grizzly Bear Population
Joint Authors
Breiwick, J. M.
Eberhardt, L. L.
Source
International Journal of Ecology
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-06-28
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Biology
Abstract EN
Yellowstone's grizzlies (Ursus arctos) have been studied for more than 40 years.
Radiotelemetry has been used to obtain estimates of the rate of increase of the population, with results reported by Schwartz et al.
(2006).
Counts of females with cubs-of-the-year “unduplicated” also provide an index of abundance and are the primary subject of this report.
An exponential model was fitted to n=24 such counts, using nonlinear leastsquares.
Estimates of the rate of increase, r, were about 0.053.
95% confidence intervals, were obtained by several different methods, and all had lower limits substantially above zero, indicating that the population has been increasing steadily, in contrast to the results of Schwartz et al.
(2006), which could not exclude a decreasing population.
The grizzly data have been repeatedly mis-used in current literature for reasons explained here.
American Psychological Association (APA)
Eberhardt, L. L.& Breiwick, J. M.. 2010. Trend of the Yellowstone Grizzly Bear Population. International Journal of Ecology،Vol. 2010, no. 2010, pp.1-5.
https://search.emarefa.net/detail/BIM-508480
Modern Language Association (MLA)
Eberhardt, L. L.& Breiwick, J. M.. Trend of the Yellowstone Grizzly Bear Population. International Journal of Ecology No. 2010 (2010), pp.1-5.
https://search.emarefa.net/detail/BIM-508480
American Medical Association (AMA)
Eberhardt, L. L.& Breiwick, J. M.. Trend of the Yellowstone Grizzly Bear Population. International Journal of Ecology. 2010. Vol. 2010, no. 2010, pp.1-5.
https://search.emarefa.net/detail/BIM-508480
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-508480