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Male Crickets Feed Females to Ensure Complete Sperm Transfer
- S. Sakaluk
- 10 February 1984
Results indicate that nuptial feeding of the female cricket functions to deter females from removing the sperm ampulla before sperm transfer is complete.
Sensory exploitation as an evolutionary origin to nuptial food gifts in insects
- S. Sakaluk
- BiologyProceedings of the Royal Society of London…
- 22 February 2000
The hypothesis that nuptial food gifts and post–copulatory female mating preferences coevolve through a unique form of sensory exploitation is supported.
A dynamic threshold model for terminal investment
- K. Duffield, E. K. Bowers, S. Sakaluk, B. Sadd
- BiologyBehavioral Ecology and Sociobiology
- 3 December 2017
A novel framework within which to view the strategy of terminal investment is proposed, incorporating factors that influence an individual’s residual reproductive value beyond a terminal investment trigger—the dynamic terminal investment threshold.
Females use self-referent cues to avoid mating with previous mates
- T. M. Ivy, C. B. Weddle, S. Sakaluk
- Biology, PsychologyProceedings of the Royal Society B: Biological…
- 7 December 2005
It is shown that female crickets (Gryllodes sigillatus) mark males with their own unique chemical signatures during mating, enabling females to recognize prior mates in subsequent encounters and to avoid remating with them.
Ejaculate expenditures of male crickets in response to varying risk and intensity of sperm competition: not all species play games
Assessing the sperm allocation of males held under three levels of apparent interrival competition in three cricket species found variations in facultative sperm allocation, which may be due to interspecific differences in population density, rearing environment, or female mating behavior.
REPRODUCTIVE BEHAVIOUR OF THE
- S. Sakaluk
Male crickets compete for females through direct physical aggression and acoustic signalling behaviour and females respond phonotactically to the calling songs of conspecific males by walking or flying to them.
Courtship feeding in decorated crickets: is the spermatophylax a sham?
The present study suggests that as a food 'gift', the spermatophylax is a sham.
Cryptic Sexual Conflict in Gift‐Giving Insects: Chasing the Chase‐Away
Results suggest that the spermatophylax synthesized by male G. Sigillatus contains substances designed to inhibit the sexual receptivity of their mates but that female G. sigillatus have evolved reduced responsiveness to these substances.
Give ‘til it hurts: trade‐offs between immunity and male reproductive effort in the decorated cricket, Gryllodes sigillatus
- S. Gershman, C. Barnett, A. Pettinger, C. B. Weddle, J. Hunt, S. Sakaluk
- BiologyJournal of evolutionary biology
- 1 April 2010
Analysis of male decorated crickets from eight inbred lines revealed that males showed a phenotypic but not a genetic trade‐off between spermatophylax mass and lytic activity, suggesting that this trade-off is mediated largely by environmental factors.
Experimentally induced spermatophore production and immune responses reveal a trade-off in crickets
A fundamental trade-off between immunity and reproductive effort in male G. sigillatus is revealed with respect to a male's ability to synthesize a costly nuptial food gift, and the possibility that the spermatophylax serves as a Zahavian handicap is raised.