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Carcharhinus obscurus (Lesueur, 1818)
DUSKY WHALER
Black Whaler; Black Whaler Shark; Bronze Whaler; Common Whaler Shark; Dusky Shark; River Whaler; Slender Whaler Shark; Carcharhinus macrurus Ramsay and Ogilby, 1887; Carcharias obscurus Lesueur, 1818; Carcharinus obscurus Lesueur, 1818; Eulamia ebilis Whitley, 1944; Eulamia macrura Ramsay and Ogilby, 1887; Galeolamna macrurus Ramsay and Ogilby, 1877; Carcharias macrurus Ramsay and Ogilby, 1887; Galeolamna eblis Whitley, 1944; Squalus obscurus Lesueur, 1818

Life   Vertebrata   Fish   Carcharhinidae   Carcharhinus

Carcharhinus obscurus
© Copyright Ross Robertson, 2006 · 12
Carcharhinus obscurus

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Carcharhinus obscurus
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Carcharhinus obscurus

Carcharhinus obscurus
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Carcharhinus obscurus
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Overview
Main identification features
  • snout short, round; large eyes
  • 1st dorsal fin : moderate, round front edge; origin ~opposite pectoral rear tip
  • low ridge ds 2nd dorsal fin greater than 2.3 percent total length
  • pectoral: large, curved rear edge
Snout short, rounded, length before mouth 5.7-8.4% of total length; ridge on back between dorsal fins; origin of first dorsal fin over or slightly behind inner rear corner of pectoral fins; first dorsal fin relatively low; the height 5.8-10.4% of total length, tip pointed to narrowly rounded; origin of second dorsal above anal fin origin; pectoral large, curved.

Grey, shading to white ventrally, with a faint, near-horizontal, grey band invading the white of upper abdomen; tips of fins dusky.

Size: reaches 420 cm; size at birth 69-100 cm.

Habitat: Inshore to offshore coastal- pelagic, primarily on continental shelves, not in low salinity habitats.

Depth: 0-400 m.

Circumglobal in tropical and warm temperate seas; from California to the Gulf of California and central Mexico, and the Revillagigedos.

Similar to, Galapagos Shark but with dorsal fin pointed and shorter.




Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 400 m.
Depth Range Min: 0 m.
Diet: sharks/rays; bony fishes; octopus/squid/cuttlefish; sea-stars/cucumbers/urchins; mobile benthic crustacea (shrimps/crabs); sharks/rays; mobile benthic gastropods/bivalves.
Eastern Pacific Range: Northern limit=33; Southern limit=19; Western limit=-118; Eastern limit=-105; Latitudinal range=14; Longitudinal range=13.
Egg Type: Live birth; No pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Pelagic.
Global Endemism: Circumtropical ( Indian + Pacific + Atlantic Oceans); East Pacific + Atlantic (East +/or West); Transisthmian (East Pacific + Atlantic of Central America); East Pacific + all Atlantic (East+West); TEP non-endemic; West + East Pacific (but not Central); "Transpacific" (East + Central &/or West Pacific); All species.
Habitat: Water column.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Near threatened; Listed.
Length Max: 420 cm.
Regional Endemism: Island (s); Continent; Continent + Island (s); Eastern Pacific non-endemic; Tropical Eastern Pacific (TEP) non-endemic; All species.
Residency: Resident.
Salinity: Brackish; Marine.
Water Column Position: Mid Water; Near Bottom; Near Surface; Surface; Water column only;


Names
Scientific source:

Links to other sites

References
  • Bellido-Millán, J.M. and Villavicencio-Garayzar, C.J., 2002., Pesqueria artesanal de tiburon en la region central del Golfo de California. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:143-152.
  • Béarez, P., 1996., Lista de los Peces Marinos del Ecuador Continental., Revista de Biologia Tropical, 44:731-741.
  • Castro-Aguirre, J.L. and Balart, E.F., 2002., La ictiofauna de las islas Revillagigedos y sus relaciones zoogeograficas, con comentarios acerca de su origen y evolucion. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:153-170.
  • Compagno , L. J. V. and Cook, S. F., 1995., The exploitation and conservation of freshwater elasmobranchs: status of taxa and prospects for the future., Journal of Aquariculture and Aquatic Sciences, 7:62-90.
  • Compagno, L.J.V., 1999., Checklist of living elasmobranchs. In Hamlett W.C. (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes., The John Hopkins University Press:471-498.
  • Compagno, L.J.V., 1984., Sharks of the World. An annotated and illustrated catalogue of shark species known to date. Part 2. Carcharhiniformes. FAO Species Catalogue., FAO Fish. Synop. No 125, 4(2):251-655.
  • Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • Galván-Magaña, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., Pérez-España, H., Chávez-Ramos, H., 1996., Systematics list of the fishes from Cerralvo island, Baja California Sur, Mexico., Ciencias Marinas, 22:295-311.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Gelsleichter , J. , Musick , J. A. and Nichols, S., 1999., Food habits of the smooth dogfish, Mustelus canis, dusky shark, Carcharhinus obscurus, Atlantic sharpnose shark, Rhizoprionodon terraenovae, and the sand tiger, Carcharias tauruss, from the northwest Atlantic Ocean., Environmental Biology of Fishes, 54:205-217.
  • Lea, R.N. and Rosenblatt, R.H., 2000., Observations on fishes associated with the 1997-1998 El Niño off California., CalCOFL Rep., 41:117-129.
  • Lesueur, C. A., 1818., Description of several new species of North American fishes., J. Acad. Nat. Sci. Phila., 1:222-235.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Madrid Vera , J. , Ruíz Luna , A. and Rosado Bravo, I., 1998., Peces de la plataforma continental de Michoacán y sus relaciones regionales en el Pacífico mexicano., Revista de Biologia Tropical, 42(2):267-276.
  • Meek , S.E. and Hildebrand, S.F., 1923., The marine fishes of Panama. Part I., Field Mus. Nat. Hist., Zool. Ser. Publ., XV:1-330.
  • Musick, J.A., Harbin, M.M., Berkeley, S.A., Burgess, G.H. Eklund, A.M., Findley, L., Gilmore, R.G., Golden, J.T., Ha, D.S., Huntsman, G.R., McGovern, J.C., Parker, S.J., Poss, S.G., Sala, E., & Schmidt, T.W., Sedberry, G.R., Weeks, H., Wright, S.G., 2000., Marine, estuarine, and diadromous fish stocks at risk of extinction in North America (exclusive of Pacific salmonids)., Fisheries, 25:6-30.
  • Ramírez Rodríguez, M., 1997., Producción pesquera en la Bahía de La Paz, B.C.S.. En Urbán Ramírez, J. y M. Ramírez Rodríguez (Eds.). La Bahía de La Paz investigación y conservación., Universidad Autónoma de Baja California Sur:273-282.
  • Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.
  • Villavicencio Garayzar , C. J. , Mariano Meléndez , E. and Downton Hoffmann, C., 1997., Tiburones capturados comercialmente en la Bahía de La Paz, B.C.S.. En Urbán Ramírez, J. y M. Ramírez Rodríguez (Eds.). La Bahía de La Paz investigación y conservación., Universidad Autónoma de Baja California Sur:201-236.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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Species Carcharhinus obscurus (Lesueur, 1818)

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CAAB : 37018003 Taxon concept Carcharhinus_obscurus last modified 2016-06-30 16:08:44.95

Species Carcharhinus obscurus (Lesueur, 1818)

Dusky Whaler , Black Whaler, Black Whaler Shark, Bronze Whaler, Common Whaler Shark, Dusky Shark, River Whaler, Slender Whaler Shark, Whaler Shark

 

Taxonomic Decision for Synonymy

 

Generic Combinations

 

Distribution

States

New South Wales, Northern Territory, Queensland, South Australia, Tasmania, Victoria, Western Australia


Extra Distribution Information

Circum-Australia; tropical, temperate, circumglobal (except Central Pacific).


IBRA and IMCRA regions (map not available)

IMCRA

Timor Transition (1), Southeast Transition (11), Central Eastern Province (12), Tasman Basin Province (13), Lord Howe Province (14), Central Eastern Transition (15), Kenn Transition (16), Northeast Province (18), Northeast Transition (19), Cape Province (20), Northern Shelf Province (25), Northwest Shelf Transition (26), Northwest Shelf Province (27), Central Western Shelf Province (29), Southwest Shelf Transition (30), Southwest Shelf Province (31), Great Australian Bight Shelf Transition (32), Spencer Gulf Shelf Province (33), Western Bass Strait Shelf Transition (34), Bass Strait Shelf Province (35), Tasmanian Shelf Province (36), Southeast Shelf Transition (37), Central Eastern Shelf Province (38), Central Eastern Shelf Transition (39), Northeast Shelf Province (40), Northeast Shelf Transition (41), Central Western Transition (5), Central Western Province (6), Southwest Transition (7)

Other Regions

Coral Sea Islands Territory

Ecological Descriptors

Continental shelf, continental slope, inshore, marine, pelagic.

Extra Ecological Information

Close to shore out to oceanic areas to 400 m.

 

General References

Compagno, L.J.V. 1984. FAO Species Catalogue. Sharks of the World. An annotated and illustrated catalogue of shark species known to date. Carcharhiniformes. FAO Fisheries Synopsis No. 125 . Rome : FAO Vol. 4(2) 251-655 pp. [487]

Compagno, L.J.V., Dando, M. & Fowler, S. 2005. A Field Guide to the Sharks of the World . London : Collins 368 pp. [302]

Compagno, L.J.V. & Niem, V.H. 1998. Family Carcharhinidae. pp. 1312-1360 in Carpenter, K.E. & Niem, V.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes . Rome : FAO Vol. 2 687-1396 pp. [1344]

Hutchins, J.B. & Swainston, R. 1986. Sea Fishes of Southern Australia. Complete field guide for anglers and divers . Perth : Swainston Publishing 180 pp. [24]

Kailola, P.J., Williams, M.J., Stewart, P.C., Reichelt, R.E., McNee, A. & Grieve, C. 1993. Australian Fisheries Resources . Canberra : Bureau of Resource Sciences and the Fisheries Research and Development Corporation 422 pp. [193]

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia . Bathurst : Crawford House Press 437 pp. [13]

Last, P.R. & Stevens, J.D. 1994. Sharks and Rays of Australia . Canberra : CSIRO Australia 513 pp. 84 pls. [252]

Last, P.R. & Stevens, J.D. 2009. Sharks and Rays of Australia . Collingwood : CSIRO Publishing Australia 2, 550 pp. [269]

Macbeth, W.G., Vandenberg, M. & Graham, K.J. 2008. Identifying Sharks and Rays; A guide to Commercial Fishers . Sydney : New South Wales Department of Primary Industry pp. 71. [16]

McCulloch, A.R. 1929. A check-list of the fishes recorded from Australia. Part I. Memoirs of the Australian Museum 5 : 1–144 [10] (as Carcharhinus macrurus )

Munro, I.S.R. 1961. Handbook of Australian fishes. Nos 1–42. Australian Fisheries Newsletter 15–17, 19, 20 : 1-172 [published as separates 1956–1961] [10] (67, as C. macrurus , 68, as C. eblis )

Pepperell, J. 2010. Fishes of the Open Ocean a Natural History & Illustrated Guide . Sydney : University of New South Wales Press Ltd 266 pp. [199]

Randall, J.E., Allen, G.R. & Steene, R. 1990. Fishes of the Great Barrier Reef and Coral Sea . Bathurst : Crawford House Press 507 pp. figs. [21]

Randall, J.E., Allen, G.R. & Steene, R. 1997. Fishes of the Great Barrier Reef and Coral Sea . Bathurst : Crawford House Press 557 pp. figs. [21]

Stevens, J.D. 1994. Families Carcharhinidae, Triakidae, Scyliorhinidae. pp. 120-138 figs 76-107 in Gomon, M.F., Glover, C.J.M. & Kuiter, R.H. (eds). The Fishes of Australia's South Coast . Adelaide : State Printer 992 pp. 810 figs. [123]

White, W. 2008. Shark Families Heterodontidae to Pristiophoridae. pp. 32-100 in Gomon, M.F., Bray, D.J. & Kuiter, R.H. (eds). Fishes of Australia's Southern Coast . Sydney : Reed New Holland 928 pp. [70]

Whitley, G.P. 1964. A survey of Australian Ichthyology. Proceedings of the Linnean Society of New South Wales 89 (1): 11-127 [33] (50 as Galeolamna eblis , 51 as Galeolamna macrurus )

 

Common Name References

Compagno, L.J.V. 1984. FAO Species Catalogue. Sharks of the World. An annotated and illustrated catalogue of shark species known to date. Carcharhiniformes. FAO Fisheries Synopsis No. 125 . Rome : FAO Vol. 4(2) 251-655 pp. [489] (FAO) (Dusky Shark)

Grant, E.M. 1975. Guide to Fishes . Brisbane : Queensland Government, Co-ordinator General’s Department 640 pp. [41] (River Whaler, Whaler Shark)

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia . Bathurst : Crawford House Press 437 pp. [13] (Black Whaler)

Last, P.R. & Stevens, J.D. 1994. Sharks and Rays of Australia . Canberra : CSIRO Australia 513 pp. 84 pls. [252] (Bronze Whaler)

Munro, I.S.R. 1961. Handbook of Australian fishes. Nos 1–42. Australian Fisheries Newsletter 15–17, 19, 20 : 1-172 [published as separates 1956–1961] [10] (Black Whaler Shark, Common Whaler Shark, Slender Whaler Shark)

Seafood Services Australia 2008. Australian Fish Names Standard. http://www.fishnames.com.au/. ( Dusky Whaler )

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
16-Aug-2012 30-Jun-2016 MODIFIED
16-Apr-2012 16-Apr-2012 MODIFIED
29-Jul-2011 MODIFIED

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Last modified: Thursday, 30 June 2016 4:08:44 PM AEST

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Following modified from Taiwan Biodiversity National Information Network
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Kingdom Animalia  
 Phylum Chordata  
 Class Chondrichthyes  
 Order Carcharhiniformes  
 Family Carcharhinidae  
 Genus Carcharhinus  
  Carcharhinus obscurus    (Lesueur, 1818) 
Provider: Pofeng Lee& Shoou-Jeng Joung 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Carcharhinus iranzae Carcharhinus lamiella Carcharhinus obscurella Carcharias macrurus Carcharinus iranzae Carcharinus obscurus Eulamia obscura Galeolamna macrurus Prionodon obvelatus Squalus obscurus   details
Citation: 臺灣魚類誌(沈等, 1993); 中國動物誌-圓口綱及軟骨魚綱(朱等, 2001); FAO Species Catalogue, Vol.4 Sharks of the world
Character: A large, fairly slender species. Snout short to moderately long and broadly rounded. Eyes moderately large, its length 1-2.1% of total length. Gill slits moderately long, length of the 3rd 2.7-4% of total length and less than a third of 1st dorsal fin base. Rows of anteroposterior teeth in each jaw half 14-15/13-15. Upper teeth with broad, triangular, strong serrated, rather low erect to slightly oblique cusps, that smoothly merge into crown feet which have slightly coarser serrations but no cusplets. Lower teeth with erect, moderately broad, serrated cusps and tranverse or sometimes arched roots. Interdorsal ridge present. First dorsal fin moderated-sized, with a pointed or narrowly rounded apex. Origin of 1st dorsal fin usually over or slightly anterior to the pectoral free rear tips. Inner margin of 1st dorsal moderately short, a third of dorsal fin base or less. Second dorsal fin small and low, its height 1.5-2.3% of total length. Origin of 2nd dorsal fin about over anal origin. Pectoral fin large, with a narrow rounded or pointed apices. Number of total vertebral centra 173-194, precaudal centra 86-97. Tips of most fins dusky but not black or white. An inconspicuous white band on flank. 
Habitat: A common, coastal-pelagic, inshore and offshore warm-temperate and tropical shark. This species is strongly migratory in temperate and subtropical area in eastern North Pacific and western North Atlantic. Viviparous, with a yolk-sac placenta. Litter size  
Distribution: Western Atlantic including southern Massachusetts and George Bank to Florida, Bahamas, Cuba, north Gulf of Mexico, and Nicaragua. Eastern north Atlantic including Canary and Cape Verde Islands, Senegal, Sierra Leone. Western Indian Ocean including South A 
Utility: A very common offshore shark regularly caught with longline, hook-and-line and set bottom nets. It is utilized fresh, dried salted, frozen and smoked for human consumption, hides for leather, fins for shark-fin soup base, and liver oil extracted for vitam 
Name Code: 383078
  IUCN Red List:VU  A2bd     
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