Animalia > Chordata > Mammalia > Carnivora > Otariidae > Otaria > Otaria byronia

Otaria byronia (South American Sealion)

Synonyms: Eumetopias byronia; Otaria byroni; Otaria flavescens; Phoca byronia; Phoca flavescens

Wikipedia Abstract

The South American sea lion (Otaria flavescens, formerly Otaria byronia), also called the southern sea lion and the Patagonian sea lion, is a sea lion found on the Chilean, Ecuador, Peruvian, Uruguayan, Argentine and Southern Brazilian coasts. It is the only member of the genus Otaria. Its scientific name was subject to controversy, with some taxonomists referring to it as Otaria flavescens and others referring to it as Otaria byronia. The former eventually won out, although that may still be overturned. Locally, it is known by several names, most commonly lobo marino (es)/lobo marinho (pt) (sea wolf) and león marino (es)/leão marinho (pt) (sea lion).
View Wikipedia Record: Otaria byronia

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 8.53
EDGE Score: 2.25


Gestation [3]  11 months 27 days
Litter Size [3]  1
Litters / Year [3]  1
Maximum Longevity [3]  29 years
Snout to Vent Length [2]  7.675 feet (234 cm)
Water Biome [1]  Coastal
Weaning [3]  1 year
Adult Weight [2]  489.429 lbs (222.00 kg)
Birth Weight [3]  27.558 lbs (12.50 kg)
Female Weight [2]  317.467 lbs (144.00 kg)
Male Weight [2]  661.39 lbs (300.00 kg)
Weight Dimorphism [2]  108.3 %
Diet [1]  Carnivore
Forages - Marine [4]  100 %
Female Maturity [3]  4 years
Male Maturity [3]  6 years

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Parque Nacional Laguna San Rafael National Park II 4560904 Aisén, Chile  
Tierra Del Fuego National Park II 172861 Argentina

Biodiversity Hotspots

Name Location Endemic Species Website
Chilean Winter Rainfall-Valdivian Forests Chile No

Prey / Diet

Prey / Diet Overlap


Notorynchus cepedianus (Tiger shark)[7]


Range Map

External References


Attributes / relations provided by
1Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
2Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
3de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
4Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
5Feeding ecology of the South American sea lion Otaria flavescens: food contents and food selectivity, Mario George-Nascimento, Rodrigo Bustamante and Ciro Oyarzun, Mar. Ecol. Prog. Ser. 21 135-143, 1985
6Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
7Reproduction, abundance and feeding habits of the broadnose sevengill shark Notorynchus cepedianus in north Patagonia, Argentina, Luis O. Lucifora, Roberto C. Menni, Alicia H. Escalante, Mar Ecol Prog Ser 289: 237–244, 2005
8Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
9Nunn, C. L., and S. Altizer. 2005. The Global Mammal Parasite Database: An Online Resource for Infectious Disease Records in Wild Primates. Evolutionary Anthroplogy 14:1-2.
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0