Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-08T06:25:03.422Z Has data issue: false hasContentIssue false
  • English
  • Français

ON THE DYNAMICS OF BLACKHEADED BUDWORM POPULATIONS1

Published online by Cambridge University Press:  31 May 2012

Alan A. Berryman
Alan A. Berryman
Affiliation:
Department of Entomology, Washington State University, Pullman, Washington, USA 99164–6432
Get access Rights & Permissions [Opens in a new window]

Abstract

Based on a simple graphic analysis, I conclude that blackheaded budworm population density cycles are caused by delayed negative feedback processes, probably due to the numerical response of insect parasitoids. The parasitoid–host interaction, however, has a stable solution and continuous population density cycles can only be maintained in a variable environment.

Résumé

Sur la base d’une simple analyse graphique, je conclus que les fluctuations cycliques de la densité de population de la tordeuse à tête noire de l’épinette sont causées par des processus négatifs de régulation à retardement, résultant probablement de la réponse numérique des insectes parasitoïdes. L’interaction hôte–parasitoïdes a cependant une solution stable et le maintien des cycles de densité de population repose sur la variabilité environnementale.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 8 , August 1986 , pp. 775 - 779
Copyright
Copyright © Entomological Society of Canada 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Allee, W.C. 1931. Animal aggregations: a study in general sociology. Univ. Chicago Press, Chicago.Google Scholar
Berryman, A.A. 1978. Population cycles of the Douglas-fir tussock moth (Lepidoptera: Lymantriidae): The time-delay hypothesis. Can. Ent. 110: 513–518.Google Scholar
Berryman, A.A. 1981. Population systems: a general introduction. Plenum Press, New York.CrossRefGoogle Scholar
Luck, R.F. 1971. An appraisal of two methods of analyzing insect life tables. Can. Ent. 103: 1261–1271.Google Scholar
Ludwig, D., Jones, D.D., and Holling, C.S.. 1978. Qualitative analysis of insect outbreak systems: the spruce budworm and forest. J. Anim. Ecol. 47: 315–332.Google Scholar
McNamee, P.J. 1979. A process model for eastern blackheaded budworm (Lepidoptera: Tortricidae). Can. Ent. 111: 55–66.CrossRefGoogle Scholar
Miller, C.A. 1966. The black-headed budworm in eastern Canada. Can. Ent. 98: 592–613.Google Scholar
Morris, R.F. 1959. Single-factor analysis in population dynamics. Ecology 40: 580–588.Google Scholar
Royama, T. 1977. Population persistence and density dependence. Ecol. Monogr. 47: 1–35.Google Scholar