Cannibalism in an age-structured predator-prey system
- 166 Downloads
Recently, Kohlmeier and Ebenhöh showed that cannibalism can stabilize population cycles in a Lotka-Volterra type predator-prey model. Population cycles in their model are due to the interaction between logistic population growth of the prey and a hyperbolic functional response. In this paper, we consider a predator-prey system where cyclic population fluctuations are due to the age structure in the predator species. It is shown that cannibalism is also a stabilizing mechanism when population oscillations are due to this age structure. We conclude that in predator-prey systems, cannibalism by predators can stabilize both externally generated (consumer-resource) as well as internally generated (agestructure) fluctuations.
Unable to display preview. Download preview PDF.
- Elgar, M. A. and B. J. Crespi (Eds). 1992Cannibalism: Ecology and Evolution among Diverse Taxa, Oxford: Oxford University Press.Google Scholar
- Gabriel, W. 1985. Overcoming food limitations by cannibalism: a model study on cyclopoids.Arch. Hydrobiol. Beiheft,21, 373–381.Google Scholar
- Gabriel, W. and F. van den Bosch. 1991. Consequences of intraspecific predation: A physiologically structured model approach. InAnalyse Dynamischer Systeme in Medizin Biologie un Ecology, D. P. F. Möller and O. Richter (Eds), Informatik Fachberichte Vol. 275, pp. 177–184. Berlin: Springer.Google Scholar
- Maas, P., W. S. C. Gurney and R. M. Nisbet. 1984. SOLVER—an adaptable program template for initial value problem solving. Glasgow: University of Strathclyde, Applied Physics Industrial Consultants.Google Scholar
- van den Bosch, F. and W. Gabriel. 1991. The impact of cannibalism on the population dynamics of cyclopoid copepods.Verh. Internat. Verein. Limnol. 24, 2848–2850.Google Scholar
- van den Bosch, F. and B. Santer. 1993. Cannibalism inCyclops abyssorum.OIKOS 67, 19–28.Google Scholar