There is a strong correlation between size dimorphism and mean harem size. Other factors such as diet, defense can be involved. C. Location of Mates. Get there first. Alcock s bees.
Males dig up females detected by sound.
Silkmoth and Bombycol - antennae of males. 4 molecules a second. Operates over 20 km. D. Guard immature or unreceptive females until receptive. 1. crabs 2.