Evolutionarily stable strategies of age-dependent sexual advertisement

Kokko, Hanna

doi:10.1007/s002650050369

Cited by 271 publications

(288 citation statements)

References 39 publications

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“…Older male swamp sparrows could increase female fitness directly by providing females and offspring with access to more or higherquality resources. Furthermore, genetic models support the hypothesis that female preferences for traits that indicate age should offer females indirect benefits through genes for general viability (Kokko & Lindströ m 1996;Kokko 1997).…”

Section: Discussionmentioning

confidence: 78%

“…Thus, if females are assessing males based on vocal performance, they are likely to be mating with older, heavier males. Although the general understanding of what aspects of male quality females are attempting to assess when choosing a mate is relatively poor (Searcy & Nowicki 2005), reliable signals of age and size are likely to provide valuable information to females both in terms of heritable variation in viability as well as the ability of males to provide high-quality resources to females and offspring (Andersson 1994;Kokko & Lindströ m 1996;Kokko 1997). Signals of male quality are particularly useful to females when they cannot directly assess aspects of male quality that could benefit them (Zahavi 1975(Zahavi , 1977Kodric-Brown & Brown 1984).…”

Section: Discussionmentioning

confidence: 99%

“…Age-dependent expression of secondary sex traits is reported in a wide variety of animal taxa (Johnstone 1995) and may be an important characteristic of reliable signals because females stand to benefit by mating with older males (Andersson 1994;Kokko & Lindströ m 1996;Kokko 1997). In general, age-dependent reproductive performance is reported in various taxa where younger individuals are less successful than older ones (Clutton-Brock 1988).…”

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confidence: 99%

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The ability to perform physically challenging songs predicts age and size in male swamp sparrows, Melospiza georgiana

Ballentine

2009

Animal Behaviour

107

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Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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The ability to perform physically challenging songs predicts age and size in male swamp sparrows, Melospiza georgiana

Ballentine

2009

Animal Behaviour

107

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“…Error-prone assessment may render honesty to hold`on average' only (Johnstone & Grafen 1992, 1993. Reliability also becomes more problematic if females can only observe the momentary e¡ort of males, which males may adjust according to life-history trade-o¡s (Lotem 1993;Kokko 1997) and current mating opportunities (Wiley 1991). Traits whose appearance can be changed according to short-term bene¢ts are especially prone to be unreliable if time available for assessing them is short; this suggests greater reliability of ¢xed morphological as compared with behavioural characters (Sullivan 1994a;MÖller et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Female choice selects for lifetime lekking performance in black grouse males

Kokko

Rintamäki

Alatalo

et al. 1999

Proc. R. Soc. Lond. B

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Good genes' models assume that females can use a signal such as mating e¡ort to assess a male's lifetime ¢tness. Inferring long-term performance from short-term behavioural observations can be unreliable, and repeated sampling may be needed for more accurate assessment of males. Additionally, if sexual advertisement is viewed as a life-history trait subject to trade-o¡s, reliable comparison of mates should yield information on all life-history components rather than on one trait value in one season. We show that in the lekking black grouse (Tetrao tetrix), a male's success is best explained by assuming that females are informed of the past history of males up to the beginning of the study (eight years). Much of this extremely lasting`memory' can be attributed to females observing long-term outcomes of male^male competition: current territory position is the only momentarily observable variable that has high power in predicting female choice, and it correlates to a male's past lekking e¡ort on a cumulative lifetime scale. We conclude that females can use territory position as a signal that conveys information of a male's lifetime performance that combines lekking e¡ort and longevity. Females may thus overcome the problem of male allocations varying in time, without the need to pay costs associated with repeated sampling.

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“…Persistence costs in H. bolina contests are most likely to accrue from exogenous sources, such as injury risk from indiscriminate collisions or predation (Kemp & Wiklund 2001). Persistence itself is therefore determined by an individual's willingness to allocate fighting effort in the face of such risk, which should ultimately relate to his residual reproductive value (Parker 1974;Enquist & Leimar 1990;Kokko 1997). Second, nectar-feeding adult butterflies, such as H. bolina, eclose with largely non-renewable energy stores and pristine wing membranes that are eroded irreversibly with age (Karlsson 1994;Kemp 2002).…”

Section: Introductionmentioning

confidence: 99%

Sexual selection constrained by life history in a butterfly

Kemp

2002

Proc. R. Soc. Lond. B

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Trait evolution via sexual selection has traditionally been viewed as isolated from life-history constraints. Recent theoretical treatments, however, predict that costly sexually selected characters should be mediated by the same allocational trade-offs that apply to more conventional aspects of reproductive investment. Participation in risky competitive behaviours, for example male-male combat, should therefore increase as the opportunity for future reproduction declines. However, the demonstration of such trade-offs has proven to be elusive due to concomitant age-based variation in the physical determinants of fighting 'ability'. Here, I exploit the unique nature of a butterfly contest system to provide compelling evidence for lifetime partitioning of risky and aggressive sexually selected behaviours. I show that male Hypolimnas bolina become more willing to persist in contests over mating territories, and more generally accepting of injury risks, as they age. Contest persistence in this species is not mediated simply by physical condition, and I experimentally isolate the effect of ageing per se from resource ownership and previous contest experience. These results demonstrate how sexually selected behaviours can be ultimately mediated by a shifting trade-off between contemporary reproductive effort and future opportunities.

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Evolutionarily stable strategies of age-dependent sexual advertisement

Cited by 271 publications

References 39 publications

The ability to perform physically challenging songs predicts age and size in male swamp sparrows, Melospiza georgiana

The ability to perform physically challenging songs predicts age and size in male swamp sparrows, Melospiza georgiana

Female choice selects for lifetime lekking performance in black grouse males

Sexual selection constrained by life history in a butterfly

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