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THE APPRAISAL OF DELAYED AND DIRECT DENSITY-DEPENDENCE1

Published online by Cambridge University Press:  31 May 2012

M. P. Hassell  and
C. B. Huffaker
M. P. Hassell
Affiliation:
Division of Biological Control, University of California, Berkeley
C. B. Huffaker
Affiliation:
Division of Biological Control, University of California, Berkeley
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Abstract

Of the methods designed to detect and measure the intensity of direct and delayed density-dependent types of mortality acting on populations, that of Morris has gained considerable acceptance. While this method of analysis has predictive value and provides a means of estimating direct density-dependence, it seems inappropriate to the detection and measurement of a delayed density-dependent mortality such as that normally associated with entomophagous parasites. The biological significance of the slopes of the linear regressions calculated in the Morris method is discussed, and population models based on the theory of Nicholson and Bailey are presented in support of the argument.

Type
Articles
Information
The Canadian Entomologist , Volume 101 , Issue 4 , April 1969 , pp. 353 - 361
Copyright
Copyright © Entomological Society of Canada 1969

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