Sexual selection by cryptic female choice on male seminal products - a new bridge between sexual selection and reproductive physiology

Eberhard, William G.; Cordero, Carlos

doi:10.1016/s0169-5347(00)89205-8

Cited by 183 publications

(121 citation statements)

References 35 publications

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“…This 'retained ejaculate' mass probably reflects the non-sperm component of ejaculate because sperm contributes little to ejaculate mass in many species (Eberhard & Cordero 1995;Simmons 2001;Owen & Katz 2005). We determined the water content of spermatophore capsules by re-weighing them after 65 h in a drying oven (608C) and subtracting this mass from initial wet mass.…”

Section: Methodsmentioning

confidence: 99%

“…Following a series of environmental manipulations of condition, there is now considerable empirical evidence for condition dependence in several types of sexually selected traits, including secondary sexual morphology, ornaments and pigmentation, and acoustic signals (Andersson 1994;Cotton et al 2004 and references therein; Bonduriansky & Rowe 2005;Punzalan et al 2008). Recent evidence suggests that male ejaculates are also sexually selected (Eberhard & Cordero 1995;Ramm et al 2007;Simmons & Kotiaho 2007;Martin-Coello et al 2009;Wigby et al 2009) and costly (e.g. Dewsbury 1982).…”

Section: Introductionmentioning

confidence: 99%

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Condition-dependent ejaculate size and composition in a ladybird beetle

Perry

Rowe

2010

Proc. R. Soc. B.

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Sexually selected male ejaculate traits are expected to depend on the resource state of males. Theory predicts that males in good condition will produce larger ejaculates, but that ejaculate composition will depend on the relative production costs of ejaculate components and the risk of sperm competition experienced by low-and high-condition males. Under some conditions, when low condition leads to poorer performance in sperm competition, males in low condition may produce ejaculates with higher sperm content relative to their total ejaculate and may even transfer more sperm than high-condition males in an absolute sense. Previous studies in insects have shown that males in good condition transfer larger ejaculates or more sperm, but it has not been clear whether increased sperm content represents a shift in allocation or simply a larger ejaculate, and thus the condition dependence of ejaculate composition has been largely untested. We examined condition dependence in ejaculate by manipulating adult male condition in a ladybird beetle (Adalia bipunctata) in which males transfer three distinct ejaculate components during mating: sperm, non-sperm ejaculate retained within the female reproductive tract, and a spermatophore capsule that females eject and ingest following mating. We found that high condition males indeed transferred larger ejaculates, potentially achieved by an increased rate of ejaculate transfer, and allocated less to sperm compared with low-condition males. Low-condition males transferred ejaculates with absolutely and proportionally more sperm. This study provides the first experimental evidence for a condition-dependent shift in ejaculate composition.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Condition-dependent ejaculate size and composition in a ladybird beetle

Perry

Rowe

2010

Proc. R. Soc. B.

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“…Studies of female remating behaviour is therefore of high interest, as this will ultimately influence many aspects of sperm competition and cryptic female choice (e.g. Parker 1970;Thornhill 1983;Eberhard and Cordero 1995;Eberhard 1996;Simmons 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Further, mating plugs may enable the male to ceil the female genital tract and thus prevent other males from mating (Alcock 1994;Baer et al 2001;Polak et al 2001). Female oviposition, receptivity or attractiveness for other males may also be affected by stimulus substances transferred in male ejaculates (Leopold 1976;Chen 1984;Eberhard and Cordero 1995;Eberhard 1996;Chapman et al 1998;Miyatake et al 1999;Andersson et al 2000;.…”

Section: Introductionmentioning

confidence: 99%

Nuptial gift consumption influences female remating in a scorpionfly: male or female control of mating rate?

Engqvist

2006

Evol Ecol

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In the scorpionfly Panorpa cognata, males provide females with saliva secretions as nuptial food gifts. Consequently, females derive material benefits and possibly also genetic benefits from multiple matings. Females therefore generally should have a high motivation to remate. Males, on the other hand, do not share this interest, which will generate a sexual conflict over remating interval, possibly leading to male adaptations that prevent females from remating with other males. In this study, I found that mated females were less prone to copulate than virgin females, despite female benefits of multiple matings. Further, I found that the remating interval was significantly longer if the first copulation was long compared to shorter matings. This effect does not entirely depend on copulation duration per se, but on the amount of saliva, that a female is consuming during copulation. These results suggest a mating-induced refractory period and can be interpreted as male manipulation of female remating behaviour mediated through substances in the nuptial gift. Alternatively, receiving large nuptial gifts may decrease the prospective direct fitness benefits from further copulations, and thus change optimal female remating rate. Furthermore, gift size has been shown to correlate with male nutritional condition, which may be an indicator of male genetic quality. Females may therefore benefit indirectly by not remating following copulations involving large saliva gifts. In this scenario, female remating interval would be an effect of cryptic female choice.

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“…As a group, Acps are roughly 2-fold more divergent than proteins in nonreproductive tissues (1,9); indeed one, Acp26Aa, is one of the most rapidly evolving genes in the D. melanogaster genome (10,11). This rapid divergence has been suggested to result from positive Darwinian selection (12,13) and to be due to the participation of seminal fluid proteins in the evolutionary dynamics of antagonistic evolution (14), sperm competition (15), and͞or sexual selection (16).…”

mentioning

confidence: 99%

Comparative structural modeling and inference of conserved protein classes in Drosophila seminal fluid

Mueller

Ripoll

Aquadro

et al. 2004

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

121

157

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The constituents of seminal fluid are a complex mixture of proteins and other molecules, most of whose functions have yet to be determined and many of which are rapidly evolving. As a step in elucidating the roles of these proteins and exposing potential functional similarities hidden by their rapid evolution, we performed comparative structural modeling on 28 of 52 predicted seminal proteins produced in the Drosophila melanogaster male accessory gland. Each model was characterized by defining residues likely to be important for structure and function. Comparisons of known protein structures with predicted accessory gland proteins (Acps) revealed similarities undetectable by primary sequence alignments. The structures predict that Acps fall into several categories: regulators of proteolysis, lipid modifiers, immunity͞ protection, sperm-binding proteins, and peptide hormones. The comparative structural modeling approach indicates that major functional classes of mammalian and Drosophila seminal fluid proteins are conserved, despite differences in reproductive strategies. This is particularly striking in the face of the rapid protein sequence evolution that characterizes many reproductive proteins, including Drosophila and mammalian seminal proteins.

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Sexual selection by cryptic female choice on male seminal products - a new bridge between sexual selection and reproductive physiology

Cited by 183 publications

References 35 publications

Condition-dependent ejaculate size and composition in a ladybird beetle

Condition-dependent ejaculate size and composition in a ladybird beetle

Nuptial gift consumption influences female remating in a scorpionfly: male or female control of mating rate?

Comparative structural modeling and inference of conserved protein classes in Drosophila seminal fluid

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