Crustacean males grasp and/or guard females before copulation to ensure mating, but females typically resist males during pair formation. The benefit of resistance for females might allow (1) females to optimize mate quality, or (2) to avoid costs incurred during guarding. However, it has not been fully investigated which benefits actually improve female fitness. Here we investigated female resistance, temporal dynamics of intersexual conflict during reproduction, and the effect of male size and male mating frequency on female fecundity in the marine isopod, Cleantiella isopus to examine the relative importance of the two mechanisms mentioned before. Females resisted even after they had become receptive. Females which mated with small males showed lower fecundity than the ones with large males, and small males were frequently unable to form pairs. These results suggest that female resistance of C. isopus against males can function as a way to optimize mate quality.
Size assortative mating by the hermit crab Pagurus filholi (Decapoda: Anomura: Paguridae). — In:
Biology of Anomura II. Crustacean research special number 6 (
AsakuraA. ed.). Carcinological Society of JapanTokyo p.
Mating strategies in isopods: from mate monopolization to conflicts. — In:
Evolutionary ecology of social and sexual systems: crustaceans as model organisms (
DuffyJ.E.ThielM. eds). Oxford University PressOxford p.
Effects of male mating frequency and male size on ejaculate size and reproductive success of female spiny king crab Paralithodes brevipes. —
Mar. Ecol. Prog. Ser.296:
The breeding biology of Idotea pelagica (Isopoda: Valvifera) with notes on the occurrence and biology of its parasite Clypeoniscus hanseni (Isopoda: Epicaridea). —
J. Mar. Biol. Ass. UK57:
Structural investigation of the female genitalia and sperm-storage sites in the terrestrial isopod Armadillidium vulgare (Crustacea, Isopoda). —
Arthrop. Struct. Dev.34: