Testing the Demographic Consequences of Cannibalism in Tribolium confusum

Abstract

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Multiple Attractors, Saddles, and Population Dynamics in Periodic Habitats

“…The LPA model has been validated by means of a number of experiments, and has been used successfully to predict transitions between equilibria, periodic cy-cles, invariant loops, and chaos, as well as saddle phenomena and phase switching in population cycles (see Costantino et al, 1995Costantino et al, , 1997Costantino et al, , 1998Cushing et al, 1996Cushing et al, , 1998Dennis et al, 1995Dennis et al, , 1997Desharnais et al, 1997;Beniot et al, 1998;Henson et al, 1998). Henson and Cushing (1997) and Costantino et al (1998) modified the autonomous LPA model (1) to account for the periodic flour volume.…”

Consumptive and nonconsumptive effects of cannibalism in fluctuating age‐structured populations

“…When cannibals and victims are in different year classes or life stages (e.g., adults and larvae), dominant cohorts of cannibals can regulate recruitment (Gaines and Roughgarden 1985, Hastings and Constantino 1987, McCauley and Murdoch 1987, Van Buskirk 1992. Negative density dependence and recruitment regulation by cannibalism have been best studied in Tribolium beetles (Park et al 1965, Mertz 1972, Benoıˆt et al 1998) and predatory fishes (Donovan et al 1997, Juanes 2003, Post 2003, Andersson et al 2007). In both cases, whether cannibalism stabilizes or destabilizes populations depends on an interplay between the positive effects on cannibal growth and fecundity and negative effects on victim survival and growth (Hastings and Constantino 1991, Claessen and de Roos 2003, Persson et al 2004a.…”

Dwarfs and Giants: Cannibalism and Competition in Size-Structured Populations

“…Cannibalism may save a population from extinction, a phenomenon referred to as the "lifeboat mechanism" (Van den Bosch et al 1988;Henson 1997), or may even lead to multiple stable states (Botsford 1981;Fisher 1987;Cushing 1991Cushing , 1992. Recent experimental and model studies of the flour beetle Tribolium show that egg cannibalism may induce complex dynamics, including chaos (Costantino et al 1997;Benoît et al 1998), which confirms the earlier hypothesis that it may induce population fluctuations (Fox 1975;Diekmann et al 1986;Hastings 1987). Conversely, cannibalism can dampen fluctuations, for example, in population models that exhibit age-dependent, single-generation cycles (Van den Bosch and Gabriel 1997).…”