Probability functions for components of the Dendroctonus frontalis—Host tree population system and their potential use with population models

Autor: Fargo, W. S., Wagner, T. L., Coulson, R. N., Cover, J. D., McAudle, T., Schowalter, T. D.
Zdroj: Population Ecology; June 1982, Vol. 24 Issue: 1 p123-131, 9p
Abstrakt: Detailed investigation of the within-tree population system of Dendroctonus frontalisZimmermannhas resulted in a large data base consisting of abundance estimates for various life stages. This data base was used to construct histograms for transformed estimates and several life stage indices. Histograms were also constructed for transformed values of adult residence time, brood development time, and several host-tree characteristics. Probability and cumulative density functions of the Weibull distribution were fitted, in tandem, to the scaled frequencies and interval means for each histogram. The inverse cumulative function is known, and with a uniform random number generator, allows the selection of random deviates from each distribution. This technique can be used for generating initial (starting) values in D. frontalispopulation models.
Databáze: Supplemental Index
Externí odkaz: