 In a similar experiment looking at mating sites in blueheaded wrasse ("Thalassoma bifasciatum"), researcher Warner found that individuals chose mating sites based on social traditions and not based on the resource quality of the site.Warner found that although mating sites were maintained for four generations, when entire local populations were translocated elsewhere, new sites were used and maintained.A popular method of approaching the study of animal culture (and its transmission) is the "ethnographic method," which argues that culture causes the geographical differences in the behavioral repertoires of large-brained mammals.