sexual selection in Mediterranean fruit flies: advantages for large and protein-fed males.
This internal structure is specialized for postcopulatory
sperm storage (Hartnoll 1968, Diesel 1991), which promotes both male-male competition and male strategies to increase the probability of paternity.
, prezygotic isolation in flour beetles.
1995a), and ion channel-controlled water influx/efflux is involved in postcopulatory
sperm volume regulation (Petrunkina et al.
This provides experimental evidence that male genital morphology influences success in postcopulatory
reproductive competition," Polak said.
This suggests that the risks of competition are minimal, in contrast to what occurs in Scarabaeus, Kheper and Canthon, whose use of ephemeral resources has encouraged both precopulatory and postcopulatory
Grasshoppers tend to be polygamous, and pre- and postcopulatory
mate-guarding behavior has been documented in some species (Parker & Smith 1975, Wickler & Seibt 1985, Muse & Ono 1996, Cueva del Castillo et al.
genital grooming in male rats: prevention of sexually transmitted infections.
Adaptive significance of postcopulatory
guarding of mates
Recently, Eberhard and Cordero (1995) have tried to extend the role of sexual selection to seminal products that might influence female reproductive behavior and physiology as well as to female postcopulatory
mechanisms for male discrimination (cryptic mate choice).
The influence of sexual selection and predation on the mating and postcopulatory
guarding behavior of stone crabs (Xanthidae, Menippe).
differentially mediates the success of ejaculates when sperm from two or more males from the same species compete for fertilization) is so far lacking in these taxa: the only evidence is confined to a single study of the internally fertilizing fish Poecilia reticulata, where sperm-OF interaction mediates postcopulatory
fertilization biases towards unrelated males (Gasparini and Pilastro, 2011).