Why do two-sex geckos triumph?

From Boise, Idaho, at a meeting of the Animal Behavior Society

The smell of one invading species of gecko has a mysterious influence on the activity of the defending species, but the voodoo doesn’t work on first exposure, reports a researcher in Hawaii.

The Hawaiian Islands and many other islands in the Pacific Ocean have long been home to Lepidodactylus lugubris, a species of unisexual lizards.