 Culture can , however , impact social structure by causing behavior matching and assertive mating . Individuals within a certain culture are more likely to mate with individuals using the same behaviors rather than a random individual , thus influencing social groups and structure . For example , the spongers of Shark Bay preferentially stick with other spongers . Also , some bottlenose dolphins in Moreton Bay , Australia followed prawn trawlers to feed on their debris , while other dolphins in the same population did not . The dolphins preferentially associated with individuals with same behavior even though they all lived in the same habitat . Later on , prawn trawlers were no longer present , and the dolphins integrated into one social network after a couple of years . 
