Skull Morphometry Of Bottlenose Dolphins (Tursiops Truncatus) From The Gulf Of Mexico

Skull morphometry of 206 stranded juvenile and adult bottlenose dolphins (Tursiops truncatus) from Texas and Florida were examined. Juveniles differed significantly from adults in both Texas and Florida populations. Sexual dimorphism was present in skulls from Texas but not from Florida. Regional differences in females from Texas and Florida were apparent, especially in braincase height, whereas male bottlenose dolphins did not differ between regions. Females could be distinguished accurately to region (90% classification success) using skull morphometry. Cranial morphometrics of T. truncatus are concrete values that may aid in identification of a type specimen for each population. Furthermore, these results can be used as a standard for Tursiops in the Gulf of Mexico