Balancing sexual selection through opposing mate choice and male competition

Moore, Allen J.; Moore, Patricia J.

doi:10.1098/rspb.1999.0694

Cited by 191 publications

(207 citation statements)

References 34 publications

(65 reference statements)

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“…Sexual selection often occurs in discrete episodes (Arnold andWade 1984a, 1984b) and there is no a priori reason to expect that selection will be in the same direction on males in each consecutive selective episode (Moore and Moore 1999;Bonduriansky and Rowe 2003). Here we show that, in the absence of mate guarding, CFC reinforces pre-copulatory mate choice decisions in T. commodus.…”

Section: Episodes Of Sexual Selection In Field Cricketsmentioning

confidence: 64%

Sexual Conflict and Cryptic Female Choice in the Black Field Cricket, Teleogryllus Commodus

Bussière

Hunt

Jennions

et al. 2006

Evol

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Section: Episodes Of Sexual Selection In Field Cricketsmentioning

confidence: 64%

Sexual Conflict and Cryptic Female Choice in the Black Field Cricket, Teleogryllus Commodus

Bussière

Hunt

Jennions

et al. 2006

Evol

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“…This ratio, however, contrasts the optima shown for male traits used in pre-copulatory sexual selection, such as nightly calling effort in the black field cricket (Teleogryllus commodus), which requires a much higher intake of C to fuel this energetically costly behaviour (P : C ratio ¼ 1 : 8 [53]). In N. cinerea, male-male competition and female mate choice are mediated by the same three male sex pheromones (3-hydroxy-2-butanone, 4-ethyl-2-methoxyphenol and 2-methylthiazolidine [54]), and the expression of these pheromones and subsequent attractiveness is also optimized at a P : C ratio of 1 : 8 [45] (see the electronic supplementary material, text S4 for a detailed comparison of our feeding methodologies [45]). Collectively, these findings have two important implications for the evolution of sperm number in N. cinerea.…”

Section: Discussionmentioning

confidence: 99%

Protein and carbohydrate intake influence sperm number and fertility in male cockroaches, but not sperm viability

et al. 2015

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It is commonly assumed that because males produce many, tiny sperm, they are cheap to produce. Recent work, however, suggests that sperm production is not cost-free. If sperm are costly to produce, sperm number and/or viability should be influenced by diet, and this has been documented in numerous species. Yet few studies have examined the exact nutrients responsible for mediating these effects. Here, we quantify the effects of protein (P) and carbohydrate (C) intake on sperm number and viability in the cockroach Nauphoeta cinerea, as well as the consequences for male fertility. We found the intake of P and C influenced sperm number, being maximized at a high intake of diets with a P : C ratio of 1 : 2, but not sperm viability. The nutritional landscapes for male fertility and sperm number were closely aligned, suggesting that sperm number is the major determinant of male fertility in N. cinerea. Under dietary choice, males regulate nutrient intake at a P : C ratio of 1 : 4.95, which is midway between the ratios needed to maximize sperm production and pre-copulatory attractiveness in this species. This raises the possibility that males regulate nutrient intake to balance the trade-off between pre-and post-copulatory traits in this species.

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“…25). Preferences by females are reflected in their willingness or unwillingness to mate (25,26), and mate choice can be independent of male-male competition (27,28). Further, female behavior toward single males is no different from their behavior when multiple males are present, indicating that N. cinerea females use a threshold mating preference (22).…”

Section: N Cinerea Life Historymentioning

confidence: 99%

Reproductive aging and mating: The ticking of the biological clock in female cockroaches

Moore

2001

Proc. Natl. Acad. Sci. U.S.A.

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181

146

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Females are expected to have different mating preferences because of the variation in costs and benefits of mate choice both between females and within individual females over a lifetime. Workers have begun to look for, and find, the expected variation among females in expressed mating preferences. However, variation within females caused by changes in intrinsic influences has not been examined in detail. Here we show that reproductive aging caused by delayed mating resulted in reduced choosiness by female Nauphoeta cinerea, a cockroach that has reproductive cycles and gives live birth. Male willingness to mate was unaffected by variation in female age. Females who were beyond the optimal mating age, 6 days postadult molt, required considerably less courtship than their younger counterparts. Females who were older when they mated had fewer offspring per clutch and fewer clutches than females who mated young. Thus, reduced choosiness was correlated with a permanent reduction in fertility. There was no difference in overall senescence among females, and thus the reduction in clutch size did not result in the expected increased lifespan. We suggest that reproductive aging in N. cinerea, similar to aging in general, occurs because the maintenance of oocytes is costly, and selection is relaxed after the optimal mating period. Our results further suggest that selection for continued choosiness is also relaxed and supports direct selection on female choosiness and a cost to choosiness.aging ͉ female mate choice ͉ fitness ͉ mate quality ͉ sexual selection S exual selection theory predicts that mate choice, usually by females, evolves because of variation in benefits provided by mating with particular mates. Much of the recent research on sexual selection therefore has been directed at detecting the benefit provided by males to females (reviewed in refs. 1 and 2). Considerably less research effort has addressed variation in female preferences (3-7). During female mate choice, however, females must tradeoff the benefits gained by being choosy against the costs of stronger preferences (2). This cost͞benefit tradeoff should result in variation in the expression of female mate preferences both between females and by an individual female over her lifetime.Variation in female mate preferences can result from extrinsic or intrinsic factors. Examples of external conditions that may cause females to be less choosy when making mating decisions include environmental conditions that increase the energy output required to search for and compare different males (8) or high predation risk (9-11). Seasonal constraints on reproduction can also influence female choosiness (12).Intrinsic factors should also inf luence the expression of female mate choice (13, 14). Parker's ESS model of mate choice (13) suggests that the level of choosiness is a function of female reproductive quality. Females with a reproductive quality above a certain threshold should only accept mates of similarly high quality. However, females with a reproductive qualit...

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Balancing sexual selection through opposing mate choice and male competition

Cited by 191 publications

References 34 publications

Sexual Conflict and Cryptic Female Choice in the Black Field Cricket, Teleogryllus Commodus

Sexual Conflict and Cryptic Female Choice in the Black Field Cricket, Teleogryllus Commodus

Protein and carbohydrate intake influence sperm number and fertility in male cockroaches, but not sperm viability

Reproductive aging and mating: The ticking of the biological clock in female cockroaches

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