MitochondriaTursiops spMitochondrial DNA AnalysisMitochondrialFrequently Interact IndividualFemale OffspringAnimalmatrilinesingle matrilinespongerexist material culturecase of an exist material culturespongeecological explanationforage toolTursiops spwild bottlenose dolphincultural transmission of tool usenuclear leveladult spongersignificant genetic relatednessexclusive vertical social transmissioncultural transmission