Home sweet home: social dynamics and genetic variation of a long-term resident bottlenose dolphin population off the Chilean coast

摘要: Coastal resident and pelagic nonresident bottlenose dolphins, Tursiops truncatus , have been described in north-central Chile. Using long-term residence data (over 13 years of photo-identification) genetic mtDNA information, we analysed the social dynamics through time variation this population, evaluated its sociogenetic interaction with nonresidents. Pelagic dolphins exhibited a higher level diversity than coastal residents significant difference structure was detected between them. Based on haplotype numbers frequencies populations males females, propose population dynamic model which is composed (1) females (founder lineages) some their female descendants that were born remained group, without effective immigration from (2) male founder lineage group (3) incorporated groups. Male-biased migration groups into likely contributes to therefore may help limit inbreeding population. Finally, peripatric differentiation, where are sporadically connected explain origin unique along Chilean coast.