An adaptive theory of the increasing mortality with increasing chronological age in populations in the wild

Libertini, Giacinto

doi:10.1016/s0022-5193(88)80153-x

Cited by 98 publications

(56 citation statements)

References 18 publications

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“…However, the real world possesses spatial extent, and spatial systems routinely demonstrate altruistic behaviors [19,20,33,34] which are not evolutionarily stable in mean-field models [24,31] or well-mixed laboratory populations [34]. Previous models, some spatial, have demonstrated that se-lection for self-limited lifespan is not a theoretical impossibility, under assumptions such as continual introduction of highly advantageous mutations [35], pre-existing senescence in the form of decreasing fecundity [36] or decreasing competitive fitness [37] with increasing age, or explicit group selection among nearly-isolated subpopulations [38]. However, a generally applicable mechanism for the active selection of lifespan control has not been previously demonstrated.…”

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confidence: 99%

Programed Death is Favored by Natural Selection in Spatial Systems

2015

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confidence: 99%

Programed Death is Favored by Natural Selection in Spatial Systems

2015

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“…Despite increasing ecological realism, most theory for the evolution of senescence has assumed that populations are large and well-mixed, with no preferential interactions among kin (but see Libertini 1988). Ironically, it was Hamilton's work on the very problem of kin interactions (Hamilton 1964) that led to fundamental changes in our understanding of the role of dispersal and kin interaction in shaping the evolution of behaviour in viscous, spatially structured populations (Lehmann & Keller 2006).…”

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confidence: 99%

Kin competition, natal dispersal and the moulding of senescence by natural selection

Ronce

Promislow

2010

Proc. R. Soc. B.

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Most theoretical models for the evolution of senescence have assumed a very large, well mixed population. Here, we investigate how limited dispersal and kin competition might influence the evolution of ageing by deriving indicators of the force of selection, similar to Hamilton (Hamilton 1966 J. Theor. Biol. 12, 12 -45). Our analytical model describes how the strength of selection on survival and fecundity changes with age in a patchy population, where adults are territorial and a fraction of juveniles disperse between territories. Both parent-offspring competition and sib competition then affect selection on agespecific life-history traits. Kin competition reduces the strength of selection on survival. Mutations increasing mortality in some age classes can even be favoured by selection, but only when fecundity deteriorates rapidly with age. Population structure arising from limited dispersal however selects for a broader distribution of reproduction over the lifetime, potentially slowing down reproductive senescence. The antagonistic effects of limited dispersal on age schedules of fecundity and mortality cast doubts on the generality of conditions allowing the evolution of 'suicide genes' that increase mortality rates without other direct pleiotropic effects. More generally, our model illustrates how limited dispersal and social interactions can indirectly produce patterns of antagonistic pleiotropy affecting vital rates at different ages.

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“…While it is well established that age can affect direct fitness (Reed et al 2008;Bouwhuis et al 2009), researchers have also suggested implications for inclusive fitness (Libertini 1988;Lee 2003;Bourke 2007;Ronce et al 2010). …”

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confidence: 99%