Animalia > Chordata > Mammalia > Carnivora > Otariidae > Arctocephalus > Arctocephalus townsendi

Arctocephalus townsendi (Guadalupe Fur Seal)

Synonyms: Arctophoca townsendi
Language: Spanish

Wikipedia Abstract

The Guadalupe fur seal (Arctocephalus townsendi) is one of six members of the fur seal genus Arctocephalus. Sealers reduced the population to just a few dozen by the late 19th century, but the species had recovered to 10,000 in number by the late 1990s. Many individuals can be found on Mexico's Guadalupe Island.
View Wikipedia Record: Arctocephalus townsendi

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 7.19
EDGE Score: 2.8


Adult Weight [2]  231.49 lbs (105.00 kg)
Female Weight [2]  99.21 lbs (45.00 kg)
Male Weight [2]  363.76 lbs (165.00 kg)
Weight Dimorphism [2]  266.7 %
Diet [3]  Carnivore (Invertebrates), Piscivore
Diet - Fish [3]  70 %
Diet - Invertibrates [3]  30 %
Forages - Marine [3]  100 %
Litter Size [2]  1
Nocturnal [3]  Yes
Water Biome [1]  Coastal
Weaning [2]  10 months

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

Biodiversity Hotspots

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

Prey / Diet

Citharichthys sordidus (Sanddab)[2]
Doryteuthis opalescens (california market squid)[2]
Dosidicus gigas (jumbo squid)[4]
Eucleoteuthis luminosa (luminous flying squid)[4]
Onychoteuthis banksii (common clubhook squid)[4]
Porichthys notatus (Midshipman)[5]
Stigmatoteuthis dofleini[4]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Anoplopoma fimbria (Skil)1
Arctocephalus galapagoensis (Galapagos Fur Seal)1
Arctocephalus philippii (Juan Fernández Fur Seal)2
Brachyramphus marmoratus (Marbled Murrelet)1
Callorhinus ursinus (Northern Fur Seal)2
Caulolatilus princeps (Bighead tilefish)1
Cerorhinca monocerata (Rhinoceros Auklet)1
Citharichthys sordidus (Sanddab)1
Coryphaena hippurus (Mahi-mahi)2
Delphinus delphis (Short-beaked Saddleback Dolphin)1
Diomedea exulans (Wandering Albatross)2
Enhydra lutris (Sea Otter)1
Eopsetta jordani (Petrale sole)1
Gavia arctica (Black-throated Loon)1
Genyonemus lineatus (White croaker)1
Grampus griseus (Risso's Dolphin)1
Hippoglossus stenolepis (Pacific halibut)1
Istiophorus platypterus (Atlantic sailfish)1
Kajikia audax (Stripey)1
Kogia breviceps (Pygmy Sperm Whale)2
Lagenodelphis hosei (Fraser's Dolphin)2
Lagenorhynchus obscurus (Dusky Dolphin)1
Larus californicus (California Gull)1
Larus canus (Mew Gull)1
Larus glaucescens (Glaucous-winged Gull)1
Larus heermanni (Heermann's Gull)1
Lissodelphis borealis (Northern Right Whale Dolphin)1
Lutjanus argentiventris (yellowtail snapper)1
Makaira mazara (black spearfish)1
Merluccius productus (Whiting)1
Mesoplodon carlhubbsi (Hubbs's Beaked Whale)1
Metacarcinus magister (Dungeness crab)1
Mirounga angustirostris (Northern Elephant Seal)2
Ophiodon elongatus (Lingcod)1
Phalacrocorax penicillatus (Brandt's Cormorant)1
Phoca vitulina (Harbor Seal)1
Phocoena phocoena (Harbor Porpoise)1
Phocoenoides dalli (Dall's Porpoise)2
Phoebastria immutabilis (Laysan Albatross)1
Phoebastria nigripes (Black-footed Albatross)1
Physeter macrocephalus (Sperm Whale)2
Prionace glauca (Tribon blou)4
Pterodroma ultima (Murphy's Petrel)1
Puffinus creatopus (Pink-footed Shearwater)1
Puffinus griseus (Sooty Shearwater)1
Puffinus tenuirostris (Short-tailed Shearwater)1
Raja rhina (Longnose skate)2
Sebastes flavidus (Yellowtail rockfish)1
Sebastes goodei (Rockfish)1
Stenella attenuata (Pantropical Spotted Dolphin)2
Stenella coeruleoalba (Striped Dolphin)2
Thunnus alalunga (longfinned albacore)1
Thunnus obesus (Tuna)1
Tursiops truncatus (Bottlenosed Dolphin)1
Uria aalge (Common Murre)1
Zalophus californianus (California Sealion)1


Isistius brasiliensis (Smooth cookiecutter shark)[2]
Orcinus orca (Killer Whale)[2]

Range Map

East Pacific; Middle America; 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
2Arctocephalus townsendi, Rebecca L. Belcher and Thomas E. Lee, Jr., MAMMALIAN SPECIES No. 700, pp. 1–5 (2002)
3Hamish 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
4CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database
5Szoboszlai AI, Thayer JA, Wood SA, Sydeman WJ, Koehn LE (2015) Forage species in predator diets: synthesis of data from the California Current. Ecological Informatics 29(1): 45-56. Szoboszlai AI, Thayer JA, Wood SA, Sydeman WJ, Koehn LE (2015) Data from: Forage species in predator diets: synthesis of data from the California Current. Dryad Digital Repository.
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Wikimedia Commons licensed under a Creative Commons License
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access