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001-es BibID:	BIBFORM023392
Első szerző:	Barta Zoltán (biológus, zoológus)
Cím:	The effect of dominance hierarchy on the use of alternative foraging tactics: a phenotype-limited producing-scrounging game / Zoltán Barta, Luc-Alain Giraldeau
Dátum:	1998
Megjegyzések:	Group living is thought to be advantageous for animals, though it also creates opportunities for exploitation. Using food discovered by others can be described as a producer-scrounger, frequency-dependent game. In the game, scroungers (parasitic individuals) do better than producers (food finders) when scroungers are rare in the group, but they do worse when scroungers are common. When the individuals' payoffs do not depend on their phenotype (i.e. a symmetric game), this strong negative frequency dependence leads to a mixed stable solution where both alternatives obtain equal payoffs. Here, we address the question of how differences in so- cial status in a dominance hierarchy in?uence the indi- viduals' decision to play producer or scrounger in small foraging groups. We model explicitly the food intake rate of each individual in a dominance-structured for- aging group, then calculate the Nash equilibrium for them. Our model predicts that only strong differences in competitive ability will in?uence the use of producing or scrounging tactics in small foraging groups; dominants will mainly play scrounger and subordinates will mostly use producer. Since the differences in competitive ability of different-ranking individuals likely depend on the economic defendability of food, our model provides a step towards the integration of social foraging and re- source defence theories.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban Dominance hierarchy Game theory Group foraging Phenotype limitation Producer-scrounger
Megjelenés:	Behavioral Ecology and Sociobiology. - 42 : 3 (1998), p. 217-223. -
További szerzők:	Giraldeau, Luc-Alain
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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