Functional equivalence of grasping cerci and nuptial food gifts in promoting ejaculate transfer in katydids.

Journal article


Vahed, Karim, Gilbert, James D. J., Barrientos-Lozano, Ludivina and Weissman, David 2014. Functional equivalence of grasping cerci and nuptial food gifts in promoting ejaculate transfer in katydids. Evolution. https://doi.org/10.1111/evo.12421
AuthorsVahed, Karim, Gilbert, James D. J., Barrientos-Lozano, Ludivina and Weissman, David
Abstract

The function of nuptial gifts has generated longstanding debate. Nuptial gifts consumed during ejaculate transfer may allow males to transfer more ejaculate than is optimal for females. However, gifts may simultaneously represent male investment in offspring. Evolutionary loss of nuptial gifts can help elucidate pressures driving their evolution. In most katydids (Orthoptera: Tettigoniidae), males transfer a spermatophore comprising two parts: the ejaculate-containing ampulla and the spermatophylax-a gelatinous gift that females eat during ejaculate transfer. Many species, however, have reduced or no spermatophylaces and many have prolonged copulation. Across 44 katydid species, we tested whether spermatophylaces and prolonged copulation following spermatophore transfer are alternative adaptations to protect the ejaculate. We also tested whether prolonged copulation was associated with (i) male cercal adaptations, helping prevent female disengagement, and (ii) female resistance behavior. As predicted, prolonged copulation following (but not before) spermatophore transfer was associated with reduced nuptial gifts, differences in the functional morphology of male cerci, and behavioral resistance by females during copulation. Furthermore, longer copulation following spermatophore transfer was associated with larger ejaculates, across species with reduced nuptial gifts. Our results demonstrate that nuptial gifts and the use of grasping cerci to prolong ejaculate transfer are functionally equivalent.

KeywordsNuptial gifts; Sexual conflict; Sexually antagonistic coevolution; Spermatophylax; Spermatophore
Year2014
JournalEvolution
PublisherWiley
ISSN143820
Digital Object Identifier (DOI)https://doi.org/10.1111/evo.12421
Web address (URL)http://hdl.handle.net/10545/592829
hdl:10545/592829
Publication dates21 May 2014
Publication process dates
Deposited05 Jan 2016, 13:04
Accepted29 Mar 2014
SeriesVol. 68
Issue 7
Rights

Archived with thanks to Evolution

ContributorsUniversity of Derby, Department of Biological and Forensic Sciences; College of Life and Natural Sciences; University of Derby; Kedleston Rd Derby DE22 1GB United Kingdom, University of Sussex; John Maynard Smith Building; Falmer Brighton BN1 9QG United Kingdom, Department of Entomology; California Academy of Sciences; San Francisco California 94118 and Instituto Tecnológico de Cd. Victoria; Boulevard Emilio Portes Gil No. 1301, Cd. Victoria; Tamaulipas 87010 México
File
File Access Level
Controlled
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
File
File Access Level
Open
Permalink -

https://repository.derby.ac.uk/item/92v0y/functional-equivalence-of-grasping-cerci-and-nuptial-food-gifts-in-promoting-ejaculate-transfer-in-katydids

Download files

  • 5
    total views
  • 0
    total downloads
  • 0
    views this month
  • 0
    downloads this month

Export as

Related outputs

Male genital titillators and the intensity of post-copulatory sexual selection across bushcrickets
Lehmann, Gerlind, Gilbert, James D. J., Vahed, Karim and Lehmann, Arne W. 2017. Male genital titillators and the intensity of post-copulatory sexual selection across bushcrickets. Behavioral Ecology. https://doi.org/10.1093/beheco/arx094
Paternity analysis of wild-caught females shows that sperm package size and placement influence fertilization success in the bushcricket Pholidoptera griseoaptera
Parker, Darren James, Zaborowska, Julia, Ritchie, Michael Gordon and Vahed, Karim 2017. Paternity analysis of wild-caught females shows that sperm package size and placement influence fertilization success in the bushcricket Pholidoptera griseoaptera. Molecular Ecology. https://doi.org/10.1111/mec.14089
Emerging issues in the evolution of animal nuptial gifts
Lewis, Sara M., Vahed, Karim, Koene, Joris M., Bussiere, Luc F., Gwynne, Darryl, Engqvist, Leif, Perry, Jennifer and Lehmann, Gerlind 2014. Emerging issues in the evolution of animal nuptial gifts. Biology Letters. https://doi.org/10.1098/rsbl.2014.0336
Free amino acids as phagostimulants in cricket nuptial gifts: support for the 'Candymaker' hypothesis
Warwick, Stuart, Vahed, Karim, Raubenheimer, David and Simpson, Stephen, J. 2009. Free amino acids as phagostimulants in cricket nuptial gifts: support for the 'Candymaker' hypothesis. Biology Letters. https://doi.org/10.1098/rsbl.2008.0731
The evolution of large testes: Sperm competition or male mating rate?
Vahed, Karim and Parker, Darren James 2011. The evolution of large testes: Sperm competition or male mating rate? Ethology. https://doi.org/10.1111/j.1439-0310.2011.01991.x
Larger testes are associated with a higher level of polyandry, but a smaller ejaculate volume, across bushcricket species (Tettigoniidae)
Vahed, Karim, Parker, Darren James and Gilbert, James D. J. 2010. Larger testes are associated with a higher level of polyandry, but a smaller ejaculate volume, across bushcricket species (Tettigoniidae). Biology Letters. https://doi.org/10.1098/rsbl.2010.0840
The intensity of pre- and post-copulatory mate guarding in relation to spermatophore transfer in the cricket Gryllus bimaculatus
Parker, Darren James and Vahed, Karim 2009. The intensity of pre- and post-copulatory mate guarding in relation to spermatophore transfer in the cricket Gryllus bimaculatus. Journal of Ethology. https://doi.org/10.1007/s10164-009-0176-6
Comparative evidence for a cost to males of manipulating females in bushcrickets
Vahed, Karim 2007. Comparative evidence for a cost to males of manipulating females in bushcrickets. Behavioral Ecology. https://doi.org/10.1093/beheco/arm021
Comparison of forced mating behaviour in four taxa of Anonconotus, the Alpine bushcricket
Vahed, Karim and Carron, G. 2008. Comparison of forced mating behaviour in four taxa of Anonconotus, the Alpine bushcricket. Journal of Zoology. https://doi.org/10.1111/j.1469-7998.2008.00492.x
All that Glisters is not Gold: Sensory Bias, Sexual Conflict and Nuptial Feeding in Insects and Spiders
Vahed, Karim 2007. All that Glisters is not Gold: Sensory Bias, Sexual Conflict and Nuptial Feeding in Insects and Spiders. Ethology. https://doi.org/10.1111/j.1439-0310.2006.01312.x
The function of nuptial feeding in insects: a review of empirical studies
Vahed, Karim 1998. The function of nuptial feeding in insects: a review of empirical studies. Biological Reviews. https://doi.org/10.1111/j.1469-185X.1997.tb00025.x
Coercive copulation in the alpine bushcricket anonconotus alpinus yersin (Tettigoniidae: Tettigoniinae: Platycleidini)
Vahed, Karim 2002. Coercive copulation in the alpine bushcricket anonconotus alpinus yersin (Tettigoniidae: Tettigoniinae: Platycleidini). Ethology. https://doi.org/10.1046/j.1439-0310.2002.00838.x
Structure of spermatodoses in shield-back bushcrickets (Tettigoniidae, Tettigoniinae)
Vahed, Karim 2003. Structure of spermatodoses in shield-back bushcrickets (Tettigoniidae, Tettigoniinae). Journal of Morphology. https://doi.org/10.1002/jmor.10110
Larger ejaculate volumes are associated with a lower degree of polyandry across bushcricket taxa
Vahed, Karim 2006. Larger ejaculate volumes are associated with a lower degree of polyandry across bushcricket taxa. Proceedings of the Royal Society B: Biological Sciences. https://doi.org/10.1098/rspb.2006.3593
Increases in egg production in multiply mated female bushcrickets Leptophyes punctatissima are not due to substances in the nuptial gift
Vahed, Karim 2003. Increases in egg production in multiply mated female bushcrickets Leptophyes punctatissima are not due to substances in the nuptial gift. Ecological Entomology. https://doi.org/10.1046/j.1365-2311.2003.00478.x
Male gryllus bimaculatus guard females to delay them from mating with rival males and to obtain repeated copulations
Wynn, Helen and Vahed, Karim 2004. Male gryllus bimaculatus guard females to delay them from mating with rival males and to obtain repeated copulations. Journal of Insect Behavior. https://doi.org/10.1023/B:JOIR.0000025132.02196.da
Increased copulation duration before ejaculate transfer is associated with larger spermatophores, and male genital titillators, across bushcricket taxa
Vahed, Karim, Lehmann, Gerlind, Gilbert, James D. J. and Lehmann, A. W. 2011. Increased copulation duration before ejaculate transfer is associated with larger spermatophores, and male genital titillators, across bushcricket taxa. Journal of Evolutionary Biology. https://doi.org/10.1111/j.1420-9101.2011.02325.x
Cryptic female choice in crickets and relatives (Orthoptera: Ensifera)
Vahed, Karim 2015. Cryptic female choice in crickets and relatives (Orthoptera: Ensifera). in: Springer.