2021
DOI: 10.1098/rspb.2021.1068
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Direct and indirect effects of male genital elaboration in female seed beetles

Abstract: Our understanding of coevolution between male genitalia and female traits remains incomplete. This is perhaps especially true for genital traits that cause internal injuries in females, such as the spiny genitalia of seed beetles where males with relatively long spines enjoy a high relative fertilization success. We report on a new set of experiments, based on extant selection lines, aimed at assessing the effects of long male spines on females in Callosobruchus maculatus . We first dra… Show more

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Cited by 7 publications
(8 citation statements)
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References 66 publications
(134 reference statements)
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“…The economics of mating in females . Large male ejaculates are known to affect females positively in this group ( 80 , 91 ), while injurious male genitalia have been shown to affect females negatively ( 66 69 ). Females show a series of adaptations related to mating, including investment in phenoloxidase (PO) to allow healing of internal wounds caused by male genitalia ( 92 ) and an enlarged internal reproductive tract ( 67 , 93 ).…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The economics of mating in females . Large male ejaculates are known to affect females positively in this group ( 80 , 91 ), while injurious male genitalia have been shown to affect females negatively ( 66 69 ). Females show a series of adaptations related to mating, including investment in phenoloxidase (PO) to allow healing of internal wounds caused by male genitalia ( 92 ) and an enlarged internal reproductive tract ( 67 , 93 ).…”
Section: Resultsmentioning
confidence: 99%
“…To females, apart from providing sperm, mating carries multiple direct costs and benefits. Among the former are internal injury and scarring caused by spiny male genitalia ( 66 69 ) and the receipt of specific toxic ejaculate substances ( 70 , 71 ). However, large ejaculates carry substantial benefits to females through the provisioning of water ( 72 , 73 ) and nutrients ( 74 76 ).…”
mentioning
confidence: 99%
“…Interestingly, our results suggest that mating harm (i.e., indirect harm) may be more costly for females. However, the lack of definitive differences among harm type categories might actually be expected given that male sexual traits that are considered harmful for females, such as genital spines, can have beneficial effects in some species by increasing female productivity ( e.g ., Arnqvist et al ., 2021). Our results also suggest that the net effect of male harm on female fitness may be affected by sexual size dimorphism and sperm competition.…”
Section: Discussionmentioning
confidence: 99%
“…The adult life span of C. maculatus typically ranges between 7 and 12 days under aphagous conditions, with females living longer than males. C. maculatus is frequently used as a model system to study sexual selection and sexual conflict (Arnqvist et al, 2021;Baur et al, 2019;Berger, You, et al, 2016;Bilde et al, 2009;Dougherty et al, 2017;Eady, 1995;Gay et al, 2009;Lieshout et al, 2013;Rönn et al, 2006Rönn et al, , 2007 because males are known to compete fiercely over access to females, leading to high levels of promiscuity and postcopulatory sexual selection. Sperm regeneration rates have been shown to evolve in response to sexual selection in C. maculatus (Baur & Berger 2020) and to be associated with increased metabolic expenditure (Immonen et al, 2016).…”
Section: Study Speciesmentioning
confidence: 99%