منابع مشابه
Sex ratios and social evolution
Are there other ways of explaining these behaviours? Spiteful behaviours have sometimes also been interpreted as a form of altruism or indirect altruism. Mutually harmful behaviours are favoured if they result in a benefit for some third party that is sufficiently related to the actor. Here, there is no requirement for negative relatedness to one’s victims, and so a distinction has been made be...
متن کاملSocial Evolution: Evolving Sex Ratios
A recent study comparing sex ratios produced by experimental evolution in spider mites with those predicted by Hamilton's Local Mate Competition Theory clearly demonstrates Evolutionary Theory's success as a quantitatively predictive science.
متن کاملSplit sex ratios in the social Hymenoptera: a meta-analysis
The study of sex allocation in social Hymenoptera (ants, bees, and wasps) provides an excellent opportunity for testing kinselection theory and studying conflict resolution. A queen–worker conflict over sex allocation is expected because workers are more related to sisters than to brothers, whereas queens are equally related to daughters and sons. If workers fully control sex allocation, split ...
متن کاملPrecise, highly female-biased sex ratios in a social spider.
It has been recognized for some time that the risk of producing maleless clutches should select for a lower than binomial variance in the sex ratio of organisms with female-biased sex ratios, small clutches and breeding groups containing the clutch of a single female. However, to date, precise sex ratios have only been reported for organisms with haplodiploid sex determination, a system which a...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/267311a0