Finding of a skull of Pseudorca crassidens in Caleta de Los Loros, Rio Negro Province, Argentina

Raimundo Lucas Bustos, Maria Fernanda Negri, Gustavo Adolfo Daneri, Esperanza Amalia Varela, Marcos Luna

Abstract


The false killer whale, Pseudorca crassidens, exhibits one of the widest and most continuous distributions among cetaceans. However, basic information about its biology is poorly known due to the low frequency of sightings and its offshore habits. Moreover, most of the knowledge on this species has been obtained from stranded animals. On 3 March 2012, in the proximity of a colony of South American sea lions (Otaria flavescens) located at Caleta de los Loros, Río Negro Province, Argentina (40o59’S, 64o14’W), a cetacean skull was found in the intertidal zone. The specimen was later identified as P. crassidens. The present note reports a new record of false killer whale in the continental shelf waters of Argentina and provides new data on the distribution and skull morphometrics of the species.


Keywords


Strandings; Life History

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References


Bastida, R. and Rodríguez, D. (2003) Mamíferos Marinos de Patagonia y Antártida. Vázquez Mazzini Editores, Buenos Aires, Argentina. 206 pp.

Bastida, R., Rodríguez, D., Secchi E. and Da Silva, V. (2007) Mamíferos Acuáticos de Sudamérica y Antártida. Vázquez Mazzini Editores, Buenos Aires, Argentina. 366 pp.

Cabrera, A. (1946) Las falsas orcas de Mar del Plata. Ciencia e Investigación II(12): 505-509.

IUCN (2012) The IUCN Red List of Threatened Species. Version 2012.1. Available at http://www.iucnredlist.org. Consulted on 6 September 2012.

Kurihara, N. and Oda, S. (2007) Cranial variation in bottlenose dolphins Tursiops spp. from the Indian and western Pacific Oceans: additional evidence for two species. Acta Theriologica 52(4): 403–418. http://dx.doi.org/10.1007/s 13364-012-0089-6

Lichter, A. and Hooper, A. (1984) Guía para el reconocimiento de cetáceos del Mar Argentino. Fundación Vida Silvestre Argentina. Buenos Aires, Argentina. 96 pp.

Meraz, J. and Berecill-Morales, F. (2004) Registro de un ejemplar varado de Pseudorca crassidens en Zipolite, Oaxaca, México. Anales del Instituto de Biología, Universidad Nacional Autónoma de México, serie Zoología 75(1): 229-235.

Pardo, A.M., Jiménez-Pinedo, C. and Palacios, D.M. (2009) The false killer whale (Pseudorca crassidens) in the southwestern Caribbean: first stranding record in Colombian Waters. Latin American Journal of Aquatic Mammals 7(1-2): 63-67. http://dx.doi.org/10.5597/lajam00136

Reyes, J.C. and Molina, D.M. (1997) Clave artificial para la identificación de cráneos de cetáceos del Pacífico Sureste. Boletin Museo Nacional de Historia Natural (Chile) 46: 95-117.

Svendsen, G.M. (2011) Reporte de varamiento de una falsa orca (Pseudorca crassidens) en la Bahía de San Antonio, Río Negro. Prensa Universitaria, Universidad Nacional del Comahue. http://prensa.uncoma.edu.ar




DOI: http://dx.doi.org/10.5597/lajam00197

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