To mate or not to mate? Females are less choosy when males are rare

Having a choice for a mating partner is extremely important for females, so they can be critical in choosing which male to mate with.

Zebrafish research: behavioral differences between wild-type strains

Often in animal research, animals with a certain genetic alteration are compared to a “wild-type”. One might assume that there is no differences between wild-types, but many different strains of wild-type animals are used.