Separating the Hawks from the Doves

A Hawk-Dove game in kleptoparasitic populations

Kleptoparasitism, the parasitism by theft, is a widespread biological phenomenon. In this paper we extend earlier models to investigate a population of conspecifics involved in foraging and, potentially, kleptoparasitism. We assume that the population is composed of two types of individuals, Hawks and Doves. The types differ according to their strategic choices when faced with an opportunity to...

Hawks and Doves in an Artificial Dynamically Structured Society

Using a dynamical network model of society, we show that cooperation is the norm in the Hawks-Doves game when individuals are allowed to break ties with undesirable neighbors and to make new acquaintances in their extended neighborhood. This is an interesting result, as standard theory for mixing populations prescribes that a certain fraction of defectors must always exist at equilibrium. We di...

Catching the Hawks and Doves: A Method for Identifying Extreme Examiners on Objective Structured Clinical Examinations”

Hawks, Doves and Lifetime Reproductive Fitness

Evolutionary game theory is an adaptation of classical game theory used to analyse and explain observed natural phenomena where organisms choose between alternative behavioural strategies. Recent analyses and simulations of evolutionary games have shown that implementation choices such as population size and selection method can have unexpected effects on the course of evolution. In this paper,...

Hunting Behavior and Diet of Cooper’s Hawks: an Urban View of the Small-bird-in-winter Paradigm

We examined the predatory behavior of wintering urban Cooper’s Hawks (Accipiter cooperii). Eight Cooper’s Hawks (7 female, 1 male) were radio-tracked intensively during two winter periods from 1999–2001. We observed 179 attacks, 35 of which were successful, for an overall attack success rate of 20%. We recorded an additional 44 kills resulting from unobserved attacks. European Starlings (Sturnu...