Animalia > Chordata > Mammalia > Cetacea > Delphinidae > Lagenorhynchus > Lagenorhynchus obscurus
 

Lagenorhynchus obscurus (Dusky Dolphin)

Synonyms: Delphinus obscurus

Wikipedia Abstract

The dusky dolphin (Lagenorhynchus obscurus) is a dolphin found in coastal waters in the Southern Hemisphere. Its specific epithet is Latin for "dark" or "dim". It is very closely genetically related to the Pacific white-sided dolphin, but current scientific consensus holds they are distinct species. The dolphin's range is patchy, with major populations around South America, southwestern Africa, New Zealand, and various oceanic islands, with some sightings around southern Australia and Tasmania.
View Wikipedia Record: Lagenorhynchus obscurus

Infraspecies

Lagenorhynchus obscurus fitzroyi (South American Dusky Dolphin)
Lagenorhynchus obscurus obscurus (South African Dusky Dolphin)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
3
 Unique (100)
Uniqueness & Vulnerability Scale: Not determined do to incomplete vulnerability data.
ED Score: 7.58

Attributes

Adult Weight [2]  281.09 lbs (127.50 kg)
Diet [3]  Carnivore (Invertebrates), Piscivore
Diet - Fish [3]  60 %
Diet - Invertibrates [3]  40 %
Forages - Marine [3]  100 %
Water Biome [1]  Coastal

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Palmer LTER Site Long Term Ecological Research   Antarctica    
Tierra Del Fuego National Park II 172861 Argentina

Prey / Diet

Doryteuthis gahi[4]
Dosidicus gigas (jumbo squid)[4]
Engraulis anchoita (Anchoita)[4]
Engraulis ringens (Anchoveta)[4]
Illex argentinus (Argentine Shortfin Squid)[4]
Lampanyctus parvicauda (Slimtailed lanternfish)[5]
Merluccius hubbsi (Southwest Atlantic hake)[4]
Normanichthys crockeri (Mote sculpin)[5]
Odontesthes regia (Silverside)[5]
Sardinops sagax (Australian pilchard)[5]
Semirossia tenera (lesser shining bobtail)[4]
Stromateus brasiliensis (Butterfish)[4]
Trachurus murphyi (Southern jack mackerel)[5]
Vinciguerria lucetia (Lightfish)[5]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Aptenodytes patagonicus (King Penguin)1
Arctocephalus philippii (Juan Fernández Fur Seal)1
Arctocephalus townsendi (Guadalupe Fur Seal)1
Arctocephalus tropicalis (Subantarctic Fur Seal)1
Balaenoptera borealis (Sei Whale)1
Balaenoptera edeni (Bryde's whale)1
Cephalorhynchus commersonii (Commerson's Dolphin)6
Cephalorhynchus eutropia (Chilean Dolphin)3
Cephalorhynchus heavisidii (Heaviside's Dolphin)1
Coryphaena hippurus (Mahi-mahi)3
Delphinus capensis (Long-beaked Common Dolphin)5
Diomedea exulans (Wandering Albatross)2
Feresa attenuata (Pygmy Killer Whale)1
Gadus chalcogrammus (Whiting)1
Gadus macrocephalus (Pacific cod)1
Galeorhinus galeus (Vitamin shark)1
Globicephala melas (Long-finned Pilot Whale)2
Istiophorus platypterus (Atlantic sailfish)1
Kajikia audax (Stripey)2
Katsuwonus pelamis (White bonito)2
Kogia breviceps (Pygmy Sperm Whale)1
Kogia sima (Dwarf Sperm Whale)2
Lagenorhynchus australis (Peale's Dolphin)3
Lagenorhynchus obliquidens (Pacific White-sided Dolphin)1
Lamna ditropis (Salmon shark)1
Lampris immaculatus (Moonfish)1
Lutjanus argentiventris (yellowtail snapper)1
Macronectes giganteus (Southern Giant Petrel)1
Makaira mazara (black spearfish)1
Mirounga leonina (Southern Elephant Seal)1
Occidentarius platypogon (Cominate sea catfish)1
Otaria flavescens (South American Sealion)3
Pelecanoides garnotii (Peruvian Diving Petrel)2
Pelecanus thagus (Peruvian Pelican)1
Phalacrocorax brasilianus (Neotropic Cormorant)2
Phalacrocorax magellanicus (rock shag)2
Phocoena phocoena (Harbor Porpoise)1
Phocoena spinipinnis (Burmeister's Porpoise)4
Phoebetria palpebrata (Light-mantled Albatross)1
Physeter macrocephalus (Sperm Whale)2
Pleoticus muelleri (Argentine red shrimp)1
Pontoporia blainvillei (Franciscana)1
Prionace glauca (Tribon blou)3
Puffinus griseus (Sooty Shearwater)2
Spheniscus magellanicus (Magellanic Penguin)3
Squalus acanthias (Common spiny)3
Stenella attenuata (Pantropical Spotted Dolphin)2
Stenella coeruleoalba (Striped Dolphin)2
Stenella longirostris (Spinner Dolphin)1
Sterna hirundinacea (South American Tern)1
Thalassarche chrysostoma (Grey-headed Albatross)1
Thalassarche melanophris (Black-browed Albatross)1
Thunnus alalunga (longfinned albacore)1
Thunnus albacares (Yellowfin-tuna)2
Thunnus maccoyii (Tunny)1
Thunnus obesus (Tuna)1
Trachurus murphyi (Southern jack mackerel)1
Trichiurus lepturus (Atlantic Cutlassfish)1
Tursiops truncatus (Bottlenosed Dolphin)4
Xiphias gladius (Swordfish)1

Consumers

Parasitized by 
Anisakis simplex[6]
Anisakis typica[6]
Braunina cordiformis[6]
Corynosoma australe[6]
Hadwenius subtilis[6]
Pholeter gastrophilus[6]
Phyllobothrium delphini[6]

Range Map

Antarctica/Southern Ocean; East Pacific; Eastern Atlantic Ocean; Indo-West Pacific; Western Atlantic Ocean;

Photos

Citations

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 animaldiversity.org
2Felisa A. Smith, S. Kathleen Lyons, S. K. Morgan Ernest, Kate E. Jones, Dawn M. Kaufman, Tamar Dayan, Pablo A. Marquet, James H. Brown, and John P. Haskell. 2003. Body mass of late Quaternary mammals. Ecology 84:3403
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
4Diet of dusky dolphins, Lagenorhynchus obscurus, in waters off Patagonia, Argentina, Alonso, MK | Crespo, EA | Garcia, NA | Pedraza, SN | Coscarella, MA, Fishery Bulletin [Fish. Bull.]. Vol. 96, no. 2, pp. 366-374. Apr 1998
5PREY OCCURRENCE IN THE STOMACH CONTENTS OF FOUR SMALL CETACEAN SPECIES IN PERU, IGNACIO GARCÍA-GODOS, KOEN VAN WAEREBEEK, JULIO C. REYES, JOANNA ALFARO-SHIGUETO AND MILENA ARIAS-SCHREIBER, LAJAM 6(2): 171-183, December 2007
6Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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