Animalia > Chordata > Mammalia > Carnivora > Otariidae > Callorhinus > Callorhinus ursinus

Callorhinus ursinus (Northern Fur Seal)

Wikipedia Abstract

The northern fur seal (Callorhinus ursinus) is an eared seal found along the north Pacific Ocean, the Bering Sea, and the Sea of Okhotsk. It is the largest member of the fur seal subfamily (Arctocephalinae) and the only living species in the genus Callorhinus. A single fossil species, Callorhinus gilmorei, is known from the Pliocene of Japan and western North America.
View Wikipedia Record: Callorhinus ursinus

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 9.75
EDGE Score: 3.76


Adult Weight [2]  364.87 lbs (165.50 kg)
Birth Weight [2]  11.64 lbs (5.28 kg)
Female Maturity [2]  3 years
Male Maturity [2]  5 years 6 months
Diet [1]  Carnivore
Gestation [2]  8 months
Litter Size [2]  1
Litters / Year [2]  1
Migration [1]  Interoceanic
Water Biome [1]  Pelagic, Coastal
Weaning [2]  3 months 17 days

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Channel Islands National Marine Sanctuary   California, United States
Channel Islands National Park II 139010 California, United States
Farallon National Wildlife Refuge IV 352 California, United States
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Katmai National Park and Preserve Ib 421782 Alaska, United States
Kronotskiy Biosphere Reserve 361480 Russia  
Mount Arrowsmith Biosphere Reserve 293047 British Columbia, Canada  
Pacific Rim National Park Reserve II 137900 British Columbia, Canada
Point Reyes National Seashore II 27068 California, United States

Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States No

Prey / Diet

Alosa sapidissima (American shad)[3]
Ammodytes hexapterus (Stout sand lance)[3]
Clupea pallasii pallasii (Pacific herring)[3]
Doryteuthis opalescens (california market squid)[4]
Engraulis mordax (Californian anchoveta)[3]
Enoploteuthis chunii[4]
Eucleoteuthis luminosa (luminous flying squid)[4]
Heterololigo bleekeri[4]
Hydrolagus colliei (Spotted rattfish)[3]
Merluccius productus (Whiting)[5]
Ocythoe tuberculata (Tuberculate Pelagic Octopus)[4]
Ommastrephes bartramii (red flying squid)[4]
Ommastrephes sloani pacificus[3]
Oncorhynchus kisutch (coho salmon or silver salmon)[3]
Oncorhynchus tshawytscha (chinook salmon or king salmon)[3]
Onykia robusta (robust clubhook squid)[4]
Pleurogrammus azonus (Okhotsk atka mackerel)[3]
Podothecus accipenserinus (Sturgeon-like sea-poacher)[3]
Thaleichthys pacificus (Candlefish)[3]
Theragra chalcogramma (Whiting)[3]
Todarodes pacificus pacificus[4]
Trichodon trichodon (Sandfish)[3]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Aechmophorus occidentalis (Western Grebe)1
Albatrossia pectoralis (Pectoral rattail)1
Alepisaurus ferox (Wolffish)1
Alopias vulpinus (Zorro thresher shark)3
Anoplopoma fimbria (Skil)2
Arctocephalus townsendi (Guadalupe Fur Seal)2
Balaenoptera acutorostrata (Minke Whale)2
Balaenoptera borealis (Sei Whale)1
Balaenoptera physalus (Fin Whale)2
Bathyraja trachura (Roughtail skate)1
Brachyramphus brevirostris (Kittlitz's Murrelet)1
Brachyramphus marmoratus (Marbled Murrelet)2
Caulolatilus princeps (Bighead tilefish)1
Cepphus columba (Pigeon Guillemot)2
Cerorhinca monocerata (Rhinoceros Auklet)7
Citharichthys sordidus (Sanddab)1
Clangula hyemalis (Oldsquaw)1
Dasycottus setiger (Spinyhead sculpin)1
Delphinus delphis (Short-beaked Saddleback Dolphin)3
Enhydra lutris (Sea Otter)1
Eopsetta jordani (Petrale sole)1
Erignathus barbatus (Bearded Seal)1
Eschrichtius robustus (Gray Whale)1
Eumetopias jubatus (Steller Sea Lion)4
Fratercula cirrhata (Tufted Puffin)4
Fratercula corniculata (Horned Puffin)1
Gadus macrocephalus (Pacific cod)2
Gavia arctica (Black-throated Loon)1
Genyonemus lineatus (White croaker)1
Grampus griseus (Risso's Dolphin)1
Haliaeetus leucocephalus (Bald Eagle)1
Haliaeetus pelagicus (Steller's Sea-Eagle)1
Hemitripterus bolini (Bigmouth sculpin)1
Hexagrammos stelleri (Greenling)1
Hippoglossoides elassodon (Paper sole)1
Hippoglossus stenolepis (Pacific halibut)5
Histriophoca fasciata (Ribbon Seal)1
Katsuwonus pelamis (White bonito)1
Kogia breviceps (Pygmy Sperm Whale)2
Lagenorhynchus obliquidens (Pacific White-sided Dolphin)2
Lamna ditropis (Salmon shark)3
Larus californicus (California Gull)1
Larus canus (Mew Gull)1
Larus glaucescens (Glaucous-winged Gull)1
Larus heermanni (Heermann's Gull)1
Larus occidentalis (Western Gull)2
Leptocottus armatus (Cabezon)2
Lissodelphis borealis (Northern Right Whale Dolphin)2
Megaptera novaeangliae (Humpback Whale)2
Merluccius productus (Whiting)4
Mirounga angustirostris (Northern Elephant Seal)4
Myoxocephalus polyacanthocephalus (Sculpin)1
Oncorhynchus clarkii (Cutthroat trout)2
Ophiodon elongatus (Lingcod)3
Orcinus orca (Killer Whale)5
Phalacrocorax auritus (Double-crested Cormorant)1
Phalacrocorax pelagicus (Pelagic Cormorant)2
Phalacrocorax penicillatus (Brandt's Cormorant)1
Phoca vitulina (Harbor Seal)2
Phocoena phocoena (Harbor Porpoise)1
Phocoenoides dalli (Dall's Porpoise)5
Phoebastria nigripes (Black-footed Albatross)1
Physeter macrocephalus (Sperm Whale)2
Pleurogrammus monopterygius (Atka mackerel)1
Podiceps auritus (Horned Grebe)2
Podiceps grisegena (Red-necked Grebe)2
Prionace glauca (Tribon blou)1
Pseudorca crassidens (False Killer Whale)1
Pterodroma ultima (Murphy's Petrel)1
Puffinus creatopus (Pink-footed Shearwater)1
Puffinus griseus (Sooty Shearwater)2
Puffinus opisthomelas (Black-vented Shearwater)1
Puffinus tenuirostris (Short-tailed Shearwater)1
Raja binoculata (Big skate)1
Raja rhina (Longnose skate)2
Rissa tridactyla (Black-legged Kittiwake)3
Sebastes caurinus (Copper rockfish)2
Sebastes crameri (Rockfish)1
Sebastes flavidus (Yellowtail rockfish)3
Sebastes goodei (Rockfish)1
Sebastes melanops (Black bass)1
Seriphus politus (Drum)1
Somniosus pacificus (Pacific Sleeper Shark)1
Squalus acanthias (Common spiny)2
Sterna paradisaea (Arctic Tern)1
Sula sula (Red-footed Booby)1
Synthliboramphus antiquus (Ancient Murrelet)1
Theragra chalcogramma (Whiting)2
Thunnus alalunga (longfinned albacore)3
Thunnus thynnus (horse mackerel)2
Tursiops truncatus (Bottlenosed Dolphin)2
Uria aalge (Common Murre)5
Ursus americanus (black bear)1
Ursus arctos (Grizzly Bear)1
Xiphias gladius (Swordfish)2
Zalophus californianus (California Sealion)3


Orcinus orca (Killer Whale)[3]


Parasitized by 
Anisakis simplex[6]
Contracaecum osculatum[6]
Corynosoma villosum[6]
Cryptocotyle jejuna[6]
Diphyllobothrium lanceolatum[6]
Diphyllobothrium pacificum[6]
Diphyllobothrium tetrapterus[6]
Parafilaroides decorus <Unverified Name>[6]
Phocitrema fusiforme[6]
Pricetrema zalophi <Unverified Name>[6]
Pseudoterranova decipiens[6]
Pyramicocephalus phocarum[6]
Skrjabinaria spirocauda <Unverified Name>[6]
Terranova azarasi <Unverified Name>[6]
Terranova decipiens[6]
Uncinaria lucasi <Unverified Name>[6]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
Moscow Zoological Park
New England Aquarium
New York Aquarium
San Diego Zoo
Vancouver Aquarium Marine Science Ctr
Zoo Hannover GmbH

Range Map

North America;



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 2de 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 3Food 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 4CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database 5Trophic Role of the Pacific Whiting, Merluccius productus, P. A. LIVINGSTON and K. M. BAILEY, Marine Fisheries Review 47(2), 1985, p. 16-22 6Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access