Animalia > Chordata > Mammalia > Carnivora > Odobenidae > Odobenus > Odobenus rosmarus

Odobenus rosmarus (Walrus)

Language: French

Wikipedia Abstract

The walrus (Odobenus rosmarus) is a large flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere. The walrus is the only living species in the family Odobenidae and genus Odobenus. This species is subdivided into three subspecies: the Atlantic walrus (O. r. rosmarus) which lives in the Atlantic Ocean, the Pacific walrus (O. r. divergens) which lives in the Pacific Ocean, and O. r. laptevi, which lives in the Laptev Sea of the Arctic Ocean.
View Wikipedia Record: Odobenus rosmarus


Odobenus rosmarus divergens (Pacific walrus) (Attributes)
Odobenus rosmarus laptevi (Laptev Sea walrus)
Odobenus rosmarus rosmarus (Atlantic walrus)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Not determined do to incomplete vulnerability data.
ED Score: 25.84


Adult Weight [1]  1.12 tons (1,012.50 kg)
Birth Weight [1]  132.28 lbs (60.00 kg)
Female Maturity [1]  4 years 9 months
Male Maturity [1]  7 years 2 months
Diet [2]  Carnivore (Invertebrates), Carnivore (Vertebrates), Piscivore
Diet - Endothermic [2]  10 %
Diet - Fish [2]  10 %
Diet - Invertibrates [2]  80 %
Forages - Marine [2]  100 %
Gestation [1]  11 months 1 day
Litter Size [1]  1
Litters / Year [1]  1
Migration [3]  Intraoceanic
Weaning [1]  2 years

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Arctic National Wildlife Refuge Ib 12402936 Alaska, United States
Auyuittuq National Park II 4808115 Nunavut, Canada
Bering Land Bridge National Preserve Ib 2823882 Alaska, United States
Great Arctic State Nature Preserve 10302372 Taimyr, Russia
Gydansky State Nature Reserve 2170015 Yamalo-Nenets, Russia
Ivvavik National Park II 2382752 Yukon, Canada
Kandalaksha State Nature Reserve 174283 Murmansk, Karelia, Russia
Kronotskiy Biosphere Reserve 361480 Russia  
Morecambe Bay 151985 England, United Kingdom
Nenetsk State Nature Reserve 774428 Nenets, Russia
North-east Greenland National Park II 237590314 Greenland
Ostrov Vrangelya (Wrangel Island) Zapovednik Nature Monument III 180 Russia    
Polar Bear Provincial Park 5502026 Ontario, Canada
Sirmilik National Park II 5475284 Canada
Taimyrsky Biosphere Reserve Ia 4403240 Taimyr, Russia
Tuktut Nogait National Park II 5761538 Northwest Territories, Canada
Ukkusiksalik National Park II   Nunavut, Canada
Ust-Lensky State Nature Reserve 3541020 Sakha, Russia
Wapusk National Park II 2614324 Manitoba, Canada

Prey / Diet

Boreogadus saida (Polar cod)[4]
Chlamys islandica (Iceland scallop)[4]
Clinocardium nuttallii (Nuttall cockle)[4]
Delphinapterus leucas (Beluga)[5]
Erignathus barbatus (Bearded Seal)[4]
Liparis gibbus (Dusky snailfish)[4]
Liparis montagui (Montagu's sea-snail)[4]
Molpadia borealis[4]
Monodon monoceros (Narwhal)[6]
Muusoctopus sibiricus[7]
Myoxocephalus scorpius (Short-spined sea scorpion)[4]
Octopus californicus (North Pacific bigeye octopus)[7]
Pagophilus groenlandicus (Harp Seal)[4]
Phoca largha (Spotted Seal)[4]
Pusa hispida (Ringed Seal)[4]
Serripes groenlandicus (Greenland cockle)[8]
Strongylocentrotus droebachiensis (Green sea urchin)[4]
Uria lomvia (Thick-billed Murre)[4]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Erignathus barbatus (Bearded Seal)1
Orcinus orca (Killer Whale)1
Ursus maritimus (Polar Bear)2


Homo sapiens (man)[4]
Orcinus orca (Killer Whale)[9]
Ursus maritimus (Polar Bear)[10]


Parasite of 
Trichinella spiralis (pork worm)[4]


Parasitized by 
Anisakis simplex[11]
Antarctophthirus trichechi[4]
Contracaecum osculatum[11]
Corynosoma semerme[11]
Corynosoma strumosum[11]
Corynosoma validum[11]
Dibothriocephalus latus[11]
Dipetalonema spirocauda[11]
Diphyllobothrium cordatum[11]
Diphyllobothrium roemeri[11]
Diphyllobothrium romeri <Unverified Name>[11]
Leptospira interrogans[12]
Microphallus orientalis[11]
Odhneriella arctica[11]
Odhneriella rossica[11]
Orthosplanchnus arcticus[11]
Orthosplanchnus fraterculus[11]
Orthosplanchnus oculatus[11]
Pseudoterranova decipiens[11]
Trichinella nativa <Unverified Name>[11]
Trichinella spiralis (pork worm)[11]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
Aquamarine Fukushimadivergens
Aquarium du Quebecdivergens
Indianapolis Zoodivergens
Kamogawa Sea Worlddivergens
Moscow Zoological Parkdivergens
New York Aquariumdivergens
Point Defiance Zoo & Aquariumdivergens

Range Map

Europe & Northern Asia (excluding China); North America; Southern Asia;



Attributes / relations provided by
1de 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
2Hamish 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
3Myers, 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
4Jorrit 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.
5Delphinapterus leucas, Barbara E. Stewart and Robert E. A. Stewart, MAMMALIAN SPECIES No. 336, pp. 1-8 (1989)
6Monodon monoceros, Randall R. Reeves and Sharon Tracey, Mammalian Species No. 127, pp. 1-7 (1980)
7CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database
8Feeding of Bearded Seals in the Bering and Chukchi Seas and Trophic Interaction with Pacific Walruses, LLOYD F. LOWRY, KATHRYN J. FROST, AND JOHN J. BURNS, ARCTIC VOL. 33, NO. 2 (JUNE 1980). P. 330-342
9Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979
10Diet composition of polar bears in Svalbard and the western Barents Sea, Andrew E. Derocher, Øystein Wiig, Magnus Andersen, Polar Biol (2002) 25: 448–452
11Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
12Nunn, 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.
Protected Areas provided by Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
Specially protected natural territories of the Russian Federation, Ministry of Natural Resources and Environment of the Russian Federation
GBIF Global Biodiversity Information Facility
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access