Author:
Stutt Alastair D.,Siva-Jothy Michael T.
Abstract
The bed bug, Cimex lectularius, has a unique mode of
copulation termed “traumatic” insemination [Carayon, J. (1966)
in Monograph of the Cimicidae, ed. Usinger, R. (Entomol.
Soc. Am., Philadelphia), pp. 81–167] during which the male pierces
the female's abdominal wall with his external genitalia and
inseminates into her body cavity [Carayon, J. (1966) in
Monograph of the Cimicidae, ed. Usinger, R. (Entomol.
Soc. Am., Philadelphia), pp. 81–167]. Under controlled natural
conditions, traumatic insemination was frequent and temporally
restricted. We show for the first time, to our knowledge, that
traumatic insemination results in (i) last-male sperm
precedence, (ii) suboptimal remating frequencies for the
maintenance of female fertility, and (iii) reduced
longevity and reproductive success in females. Experimental females did
not receive indirect benefits from multiple mating. We conclude that
traumatic insemination is probably a coercive male copulatory strategy
that results in a sexual conflict of interests.
Publisher
Proceedings of the National Academy of Sciences
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