Southernmost records of bottlenose dolphins, Tursiops truncatus

Article

Authorship

Prosser Goodall, Rae Natalie ; MARCHESI, MARÍA CONSTANZA ; Pimper, Lida Elena ; DELLABIANCA, NATALIA ANDREA ; Benegas, Luis G. ; TORRES, MONICA ANALIA ; RICCIALDELLI, LUCIANA

Date

2011

Publishing House and Editing Place

Springer

Magazine

POLAR BIOLOGY, vol. 34 (pp. 1085-1090) Springer

Summary Information provided by the agent in SIGEVA

Bottlenose dolphins (Tursiops spp.) are cosmopolitan animals widely distributed in waters of both hemispheres. The taxonomy of Tursiops has long been controversial, with over 20 specific names being published, and subspecies and inshore/offshore forms being proposed. In the southwestern South Atlantic, subspecies T. truncatus truncatus and T. truncatus gephyreus were proposed for specimens along the coasts of Brazil, Uruguay, and Argentina. Sightings of bottlenose dolphins are common along the ... Bottlenose dolphins (Tursiops spp.) are cosmopolitan animals widely distributed in waters of both hemispheres. The taxonomy of Tursiops has long been controversial, with over 20 specific names being published, and subspecies and inshore/offshore forms being proposed. In the southwestern South Atlantic, subspecies T. truncatus truncatus and T. truncatus gephyreus were proposed for specimens along the coasts of Brazil, Uruguay, and Argentina. Sightings of bottlenose dolphins are common along the coast of Argentina as far south as the Province of Chubut (ca. 46°S). Here, we summarize and discuss the southernmost records of bottlenose dolphins. We cannot make inferences about the species or subspecies to which these animals belong given the small number of specimens. Future studies of external measurements, pigmentation, DNA, and isotopes from both sides of the continent should help clarify the situation off southern South America. Furthermore, research is needed to explore a possible link between an effect of general global warming and the Tursiops specimens found this far south. The sighting and specimens described here, at 53°S-nearly 55°S, are the southernmost records for the genus and extend the range of the species in the southern South Atlantic.