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001-es BibID:	BIBFORM070939
Első szerző:	Tóth Zoltán
Cím:	Effects of relatedness on social-foraging tactic use in house sparrows / Tóth Zoltán, Bókony Veronika, Lendvai Ádám Z., Szabó Krisztián, Pénzes Zsolt, Liker András
Dátum:	2009
ISSN:	0003-3472
Megjegyzések:	Kin selection is often important in the evolution of reproductive behaviour, but we know much less about its significance for nonreproductive social groups. We investigated whether relatedness affects social-foraging behaviour in captive house sparrow, Passer domesticus, flocks, where birds may either search for food or exploit flockmates' food findings by scrounging. In such systems, both increased and decreased frequency of scrounging from relatives can be predicted by kin selection theory, depending on the relative costs and benefits of exploiting close kin. We found that birds used aggressive joining less often and obtained less food by that tactic from their close kin than from unrelated flockmates. In nonaggressive joinings, males also tended to join less often and obtained less food from close kin flockmates than from unrelated birds, whereas an opposite trend was found in females. Close kin males also spent less time feeding together from the same food patch than unrelated males, further suggesting reduced exploitation by male kin. These results suggest that house sparrows are able to recognize their close kin flockmates and reduce aggressive scrounging towards them, and that the sexes may differ in some forms of kin exploitation.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban genetic relatedness house sparrow kin discrimination Passer domesticus scrounging
Megjelenés:	Animal Behaviour 77 : 2 (2009), p. 337-342. -
További szerzők:	Bókony Veronika (alkalmazott zoológus) Lendvai Ádám Zoltán (1977-) (biológus) Szabó Krisztián (1975-) (zoológus) Pénzes Zsolt Liker András
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