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001-es BibID:	BIBFORM018788
Első szerző:	McNamara, John M.
Cím:	The optimal coyness game / John M. McNamara, Lutz Fromhage, Zoltan Barta, Alasdair I. Houston
Dátum:	2009
ISSN:	0962-8452
Megjegyzések:	In many animal species, females will benefit if they can secure their mate's help in raising their young. It has been suggested that they can achieve this by being coy (i.e. reluctant to mate) when courted, because this gives them time to assess a prospective mate's helpfulness and hence allows them to reject non-helpful males. According to this view, coyness should (i) reflect a trade-off between information gain and time lost on the part of the female, and (ii) be subject to an evolutionary feedback between optimal female coyness and male helping behaviour. Previous theory has considered each of these aspects in isolation. By contrast, here we present a comprehensive game theory model of this situation, leading to qualitatively new insights. We predict that a high degree of coyness should be associated with a high encounter rate during mate search, with an intermediate rate of information gain during mate inspection and with an intermediate dependence of reproduction on male help. Strongly biased sex ratios, however, preclude coyness. Due to the mutual feedback between coyness and helpfulness in our model, alternatively stable evolutionary outcomes (with or without coyness) are possible under broad conditions. We also discuss alternative interpretations of coyness.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban 'battle of the sexes' mate choice courtship sexual selection parental care game theory
Megjelenés:	Proceedings of the Royal Society. Series B. Biological sciences. - 276 : 1658 (2009), p. 953-960. -
További szerzők:	Fromhage, Lutz Barta Zoltán (1967-) (biológus, zoológus) Houston, Alasdair I.
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM018772
Első szerző:	McNamara, John M.
Cím:	Deterioration, death and the evolution of reproductive restraint in late life / John M. McNamara, Alasdair I. Houston, Zoltan Barta, Alexander Scheuerlein, Lutz Fromhage
Dátum:	2009
ISSN:	0962-8452
Megjegyzések:	Explaining why organisms schedule reproduction over their lifetimes in the various ways that they do is an enduring challenge in biology. An influential theoretical prediction states that organisms should increasingly invest in reproduction as they approach the end of their life. An apparent mismatch of empirical data with this prediction has been attributed to age-related constraints on the ability to reproduce. Here we present a general framework for the evolution of age-related reproductive trajectories. Instead of characterizing an organism by its age, we characterize it by its physiological condition. We develop a common currency that if maximized at each time guarantees the whole life history is optimal. This currency integrates reproduction, mortality and changes in condition. We predict that under broad conditions it will be optimal for organisms to invest less in reproduction as they age, thus challenging traditional interpretations of age-related traits and renewing debate about the extent to which observed life histories are shaped by constraint versus adaptation. Our analysis gives a striking illustration of the differences between an age-based and a condition-based approach to life-history theory. It also provides a unified account of not only standard life-history models but of related models involving the allocation of limited resources.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban life history reproduction terminal investment ageing senescence
Megjelenés:	Proceedings of the Royal Society. Series B. Biological sciences. - 276 : 1675 (2009), p. 4061-4066. -
További szerzők:	Houston, Alasdair I. Barta Zoltán (1967-) (biológus, zoológus) Scheuerlein, Alexander Fromhage, Lutz
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM002593
Első szerző:	McNamara, John M.
Cím:	The coevolution of choosiness and cooperation / John M. McNamara, Zoltan Barta, Lutz Fromhage, Alasdair I. Houston
Dátum:	2008
Megjegyzések:	Explaining the rise and maintenance of cooperation is central to our understanding of biological systems1, 2 and human societies3, 4. When an individual's cooperativeness is used by other individuals as a choice criterion, there can be competition to be more generous than others, a situation called competitive altruism5. The evolution of cooperation between non-relatives can then be driven by a positive feedback between increasing levels of cooperativeness and choosiness6. Here we use evolutionary simulations to show that, in a situation where individuals have the opportunity to engage in repeated pairwise interactions, the equilibrium degree of cooperativeness depends critically on the amount of behavioural variation that is being maintained in the population by processes such as mutation. Because our model does not invoke complex mechanisms such as negotiation behaviour, it can be applied to a wide range of species. The results suggest an important role of lifespan in the evolution of cooperation.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban Reproduction/genetics/physiology Mutagenesis Models, Biological Choice Behavior/physiology Game Theory
Megjelenés:	Nature : International weekly journal of science. - 451 : 7175 (2008), p. 189-192. -
További szerzők:	Fromhage, Lutz Houston, Alasdair I. Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:	DOI elektronikus változat
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