Results 341 to 350 of about 168,414 (382)
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Spatial Economic Analysis, 2012
Abstract In a spatial economic context, we analyse the incentive to prey of an incumbent facing the potential entrance by a rival. We show that the existence of space modifies the incentive to prey of the incumbent and the resulting equilibrium.
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Abstract In a spatial economic context, we analyse the incentive to prey of an incumbent facing the potential entrance by a rival. We show that the existence of space modifies the incentive to prey of the incumbent and the resulting equilibrium.
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The Evolution and Dynamics of Intraspecific Predation
, 1981Intraspecific predation, the process of both killing and eating an individual of the same species, is a significant and widespread process that until recently has not received the attention it merits.
G. Polis
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Chapter 11 Predators and predation
2001Publisher Summary Most field predation studies on hard clams, Mercenaria mercenaria , focuses on elucidating information for aquaculture activities and involves manipulative experiments with some form of protection. The control conditions for these studies are used to examine some ecological relationships, but the plots are seeded at relatively high
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A Theoretical Framework for Intraguild Predation
American Naturalist, 1997Many important issues in community ecology revolve around the interplay of competition and predation. Species that compete may also be locked in predator-prey interactions, a mixture of competition and predation known as "intraguild predation" (IGP ...
R. Holt, G. Polis
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Analysis of a predator–prey system with predator switching
Bulletin of Mathematical Biology, 2004In this paper, we consider an interaction of prey and predator species where prey species have the ability of group defence. Thresholds, equilibria and stabilities are determined for the system of ordinary differential equations. Taking carrying capacity as a bifurcation parameter, it is shown that a Hopf bifurcation can occur implying that if the ...
Graeme C. Wake +2 more
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Impact of predator dormancy on prey-predator dynamics
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2018The impact of predator dormancy on the population dynamics of phytoplankton-zooplankton in freshwater ecosystems is investigated using a simple model including dormancy, a strategy to avoid extinction. In addition to recently reported chaos-mediated mixed-mode oscillations, as the carrying capacity grows, we find surprisingly wide phases of nonchaos ...
Joana G. Freire +2 more
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, 2014
The theory of predation risk effects predicts behavioral responses in prey when risk of predation is not homogenous in space and time. Prey species are often faced with a tradeoff between food and safety in situations where food availability and ...
K. Lone +6 more
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The theory of predation risk effects predicts behavioral responses in prey when risk of predation is not homogenous in space and time. Prey species are often faced with a tradeoff between food and safety in situations where food availability and ...
K. Lone +6 more
semanticscholar +1 more source
THE EFFECT OF PREY AND PREDATOR DENSITIES ON WOLF PREDATION
Ecology, 2002Predator kills rate (i.e., kills per predator per time) is routinely presupposed to depend exclusively on prey density. However, per capita rates of killing may typically depend on the density of both prey and predator. Unfortunately, our perception of many ecological phenomena may be limited by the inappropriate assumption that kill rates do not ...
John A. Vucetich +2 more
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PREDATORS COME AND PREDATORS GO: THE REVERSIBILITY OF PREDATOR-INDUCED TRAITS
Ecology, 2003While numerous studies have been conducted on the ecology and evolution of phenotypic plasticity, to really understand plasticity we need to expose organisms to different environments over several ontogenetic stages. In this way, we can examine whether organisms change their phenotypic strategy over ontogeny, whether there are developmental windows ...
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