Loxodon macrorhinus   Muller & Henle,  1839 (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Elasmobranchii
Order:Carcharhiniformes
Family:Carcharhinidae

Image copyrights: Randall, J.E.

Description
Size: Max length 98.0 cm TL (male/unsexed), maturing at 73 to 85 cm.

Color: Grey above, pale below, fins with pale edges (transparent in life), caudal and first dorsal fins with narrow dark margin, first dorsal fin also with a dusky tip.

A small, very slender shark. Snout very long, parabolic in shape, its length greater than mouth width and distance betwen nostrils; labial furrows very short; anterior nasal flaps with a short, broadly triangular lobe; eyes large, with a posterior notch; spiracles absent; teeth in both jaws with low, narrow, oblique, smooth-edged cusps and no cusplets. First dorsal fin small, its origin behind free rear tips of pectoral fins by a distance greater than length of 4th gill opening, its base 2 or 3 times in distance between pectoral and pelvic fin bases, its free rear tip moderately long and not reaching backward to pelvic fin origins; second dorsal fin very small, its height less than a third of that of first dorsal, the inner margin elongated and over twice the fin height and the fin origin usually just behind anal fin insertion (occasionally over or slightly in front of it, but far behind anal midbase); pectoral fins small, narrow and slightly falcate; anal fin with a slightly concave posterior margin and long preanal ridges. Upper precaudal pit transverse and crescentic; no keels on caudal peduncle; interdorsal ridge usually absent.

Dioecious, internal (oviduct) fertilization, internal live bearers. Viviparous, with a yolk-sac placenta; 2-4 pups per litter. Size at birth 40-43 cm; 54-55 cm TL. Distinct pairing with embrace.


Synonym (s)
Carcharhinus macloti (non Muller & Henle, 1839)
(Misapplied name)
Carcharias dumerilii Bleeker, 1856
(Junior synonym)
Scoliodon affinis Ogilby, 1912
(Junior synonym)
Scoliodon ceylonensis Setna & Sarangdhar, 1946
(Junior synonym)
Scoliodon dumerili (Bleeker, 1856)
(Junior synonym)
Scoliodon jordani Ogilby, 1908
(Junior synonym)
Scoliodon laticaudus (non Muller & Henle, 1838)
(Misapplied name)
Scoliodon acutus (Ruppell, 1837)
Loxodon macrorhinus Muller and Henle 1841

Common Name (s)
• Jordans Blue Dogshark (English)
• Slender Dogshark (English)
• Sliteye Shark (English)
• Cosorrah (Tamil)
• Mushi (Marathi)
• Cosorrah (Kannada)
Economic Importance and Threats
Importance:  Commercial
(Fisheries, gamefish. Utilized fresh for human consumption; meat and fins, but of limited value due to its small size.)

Ecology
Habitat:  Demersal, Coastal
Trophic Level:  Tertiary Consumer
Prey:  Small bony fishes, shrimps, crustaceans and cuttlefish
IUCN Status:  Least Concern

Biogeography


• Tamil Nadu, Gulf of Mannar INDIA
• Southeast Coast INDIA
• Tamil Nadu INDIA
• Kerala INDIA
• SEYCHELLES
• Red Sea
• INDIA
• SRI LANKA
• INDONESIA
• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org
  • Compagno, LJV; Last, PR; Stevens, JD and MNR, Alava (2005) Checklist of Philippine Chondrichthyes CSIRO Marine Laboratories 104 pp Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Dr. Ramesh, R; Dr. Nammalwar, P and Dr. Gowri, VS (2008) Database on coastal information of Tamil Nadu Report Submitted to Environmental Information System (ENVIS) Centre, Department of Environment, Government of Tamil Nadu Institute for Ocean Management, Anna University, Chennai, Tamil Nadu. Available at - http://tnenvis.nic.in/PDF/coastal%20data.pdf
  • Encyclopedia of Life Available at - http://www.eol.org/
  • Talwar, PK and Kacker, RK (1984) Commercial sea fishes of India ZSI, Calcutta 997 pp Available at - NIO, Goa
  • Hanfee, F (1999) Management of shark fisheries in two Indian coastal states: Tamil Nadu and Kerala Case studies of the management of elasmobranch fisheries. FAO Fisheries Technical Paper. No. 378 Rome, FAO Part 1 (11) Available at - http://www.fao.org/docrep/003/X2097E/X2097E14.htm#ch11.
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51) FAO, Rome 5 Available at - http://www.fao.org/docrep/009/ad468e/ad468e00.HTM
  • Raje, SG; Sivakami, S; Mohanraj, G; Manoj Kumar, PP; Raju, A and Joshi, KK (2007) An atlas on the Elasmobranch fishery resources of India CMFRI Special publication CMFRI, Cochin, India. 95 253pp Available at - http://eprints.cmfri.org.in/4056/1/Special_Publn_95.pdf
  • Talwar, PK (1990) Fishes of Andaman and Nicobar Islands: A synoptic survey Journal of the Andaman Science Association Andaman Science Association, Port Blair 6(2) 71-102 Available at - NIO,Goa
  • Pillai, PKM and Augustine, SK (2000) A code list of common marine living resources of the Indian seas CMFRI Special Publication No.12 CMFRI 1-115 Available at - eprints.cmfri.org.in/3975/1/Special_Publication_No_12_Revised.pdf

Page last updated on:2011-10-10

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