Records of Risso’s dolphin, Grampus griseus, in coastal waters of southern Argentina

LUCIANA RICCIALDELLI; MÓNICA A. TORRES; RAE NATALIE PROSSER GOODALL; NATALIA ANDREA DELLABIANCA; LIDA ELENA PIMPER; LAURA M. REYES; ALEJANDRO FERNÁNDEZ-AJÓ; RICARDO BASTIDA

REVISTA DE BIOLOGIA MARINA Y OCEANOGRAFIA

INST OCEANOLOGIA

Año: 2011 vol. 26 p. 463 - 469

0717-3326

We review the records of Risso’s dolphin (Grampus griseus) in subantarctic waters of the southwestern South Atlantic Ocean from published and unpublished sighting and strandings. Based on 59 sighting (n = 521 individuals) and 33 stranding records (n = 88 individuals), we identified three main areas of Risso’s dolphin concentration in Patagonian waters, which have been observed mostly during the austral summer. We were unable to find published or unpublished reports of Risso’s dolphin in offshore or over deep-water areas in this region. Future studies covering other potential areas of the species’ distribution are important to improve the scarce information known for this dolphin in this area.