ABSTRACT
The study of genetic population structure can seem rather arcane and mathematically forbidding to new students of behavior, systematics, and ecology, but it is nonetheless highly relevant to these subjects. If one wants to understand why an insect species eats different host plants in different parts of its range, then one is studying population structure. If one wants to understand why sexual dimorphism is different in the north than the south of an insect’s range, then one is studying population structure.
