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We examined whether the vomeronasal organ (VNO) is the sole receptor for pheromonal cues for male sexual behavior. Males carrying surgical removal of the VNO (VNOx) mated with stimulus females as sham-operated males, with a comparable number of mounts but a prolonged latency for ejaculation. In sham-operated males, mating increased cFos immunoreactivity in(More)
Incorporation of fitness evaluation by a human user into evolutionary computation is called interactive evolutionary computation (IEC). Various IEC methods have been studied for design problems. An important challenge in IEC is to decrease human user's workload for fitness evaluation. For example, it is almost impossible for human users to continue to(More)
Evolution of cooperative strategies was examined for spatial iterated prisoner's dilemma (IPD) games in many studies. Lattices and networks were frequently used as spatial structures where a single player was assigned to each node. It was demonstrated that spatial structures were beneficial for the evolution of cooperation. In this paper, we examine the(More)