Skip to Main Content
Mathematical demography of spotted owls in the Pacific NorthwestAuthor(s): B.R. Noon; C.M. Biles
Source: Journal of Wildlife Management. 54: 18-27
Publication Series: Miscellaneous Publication
PDF: View PDF (269.0 KB)
DescriptionWe examined the mathematical demography of northern spotted owls (Strix occidentalis caurina) using simple deterministic population models. Our goals were to gain insights into the life history strategy, to determine demographic attributes most affecting changes in population size, and to provide guidelines for effective management of spotted owl populations. The spotted owl apparently has evolved high adult survival rates associated with irregular and unpredictable reproduction. The finite rate of population change (l) in this subspecies is most sensitive to variation in adult survival rate and relatively insensitive to variation in fecundity and age at first reproduction. However, rates of population change are strongly affected by reproductive senescence if it occurs before 15 years of age. Sound management practices should include efforts to control factors that adversely affect the survival rate of adult females.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationNoon, B.R.; Biles, C.M. 1990. Mathematical demography of spotted owls in the Pacific Northwest. Journal of Wildlife Management 54:18-27
- Maturation and reproduction of northern flying squirrels in Pacific Northwest forests.
- Population dynamics of the California spotted owl in the Sierra Nevada, California
- Dens of northern flying squirrels in the Pacific Northwest.
XML: View XML