Epigenetic effects on personality traits: early food provisioning and siblingcompetition Claudio Carere 1,2) , Piet J. Drent 3) , Jaap M. Koolhaas 4) & Ton G.G. Groothuis 1,5) ( 1 Department of Animal Behaviour, University of Groningen, The Netherlands; 2 Center for Cellular and Molecular
DISTRIBUTION OF PARENTAL INVESTMENT AND SIBLINGCOMPETITION IN THE HERRING GULL, LARUS ARGENTATUS by JENNIFER DAVIS1) and JAMES S. QUlNN2,3) (Departments of Psychology and Biology, McMaster University, Hamilton, Ontario L8S 4K1, Canada) (Acc. 14-II-1997) Summary Herring gulls, Larus argentatus
preference for redder gapes in open- nesting passerines, or that the bright red gape of nestling cuckoos has evolved to exploit parental preferences in these three hosts. We suggest that although mouth colour has little in uence on the allocation of feeds resulting from siblingcompetition and begging
, 1983). Strong size hierarchies may be adaptive in that they reduce siblingcompetition (Hahn, 1981) and peak food demands of young (Bryant, 1978). However, the usual consequence of size disparity is a skewed resource allocation within brood, leading to reduced growth rate, lower body masses and even
evidence of sex-biased dispersal in S.
carpocapsae for which the IJ are dioecious. We hypothesise that phoretic dispersal may
be a significant mechanism to avoid siblingcompetition and inbreeding in EPN, which
produce tens of thousands of offspring at point sources in a relatively impenetrable
for species living in different environments and under dif- ferent conditions in one environment, and it is briefly shown how delayed weaning influences the mother's future fertility in the Galapagos fur seal via siblingcompetition. 1. Species considered and the natural history of pup rearing in
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