Ganges shark
| Ganges shark | |
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| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Carcharhiniformes |
| Family: | Carcharhinidae |
| Genus: | Glyphis |
| Species: | G. gangeticus |
| Binomial name | |
| Glyphis gangeticus (J. P. Müller & Henle, 1839) |
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| Range of the Ganges shark | |
The Ganges shark (Glyphis gangeticus) is a rare species of requiem shark found in the Ganges River of India. It should not be confused with the Bull shark, which also inhabits the Ganges River and is sometimes incorrectly referred to as the Ganges shark.
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[edit] Appearance
In its external appearance, G. gangeticus is a typical requiem shark. It is stocky, with a broadly rounded snout and small eyes. The first dorsal fin is over the last third of the pectoral fins, with a free rear tip that is well in front of the pelvic fins. The second dorsal fin is much smaller than the first, but is still relatively large. The anal fin is slightly smaller than the second dorsal fin. The pectoral fins are broad and falcate. A longitudinal upper precaudal pit is present, but the interdorsal ridge is absent.
The shark tends to have a uniform gray to brownish coloration, with no discernible pattern or markings.
[edit] Distribution
The Ganges shark, as its name suggests, is largely restricted to the rivers of Eastern and North-Eastern India, particularly the Hooghly River of West Bengal, the Ganges, Brahmaputra, Mahanadi in Bihar, Assam, and Orissa respectively. Bengalis call it Baagh Maach, which means tiger fish. It is typically found in the mid- to lower reaches of a river.
[edit] Biology
The shark, though poorly documented, is known to inhabit only freshwater, inshore marine and estuarine systems. Its feeding habits are unknown. Its maximum size is in the area of 2 metres (6.6 ft). It is probably viviparous, measuring 55 to 60 centimetres (22 to 24 in) at birth.
[edit] Conservation
The Ganges shark is believed to be seriously endangered.[1] According to the International Union for Conservation of Nature and Natural Resources, the Ganges shark is one of 20 sharks on the "Red List" of endangered shark species.[2] Widespread and rampant overfishing has depleted the population of these sharks. Their oil, along with that of the Gangetic Dolphin is highly sought after.
[edit] References
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This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. (November 2009) |
- "Glyphis gangeticus". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=160463. Retrieved 23 January 2006.
- Froese, Rainer, and Daniel Pauly, eds. (2005). "Glyphis gangeticus" in FishBase. 10 2005 version.
[edit] Notes
- ^ Shark Specialist Group (1996). Glyphis gangeticus. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 8 May 2006.
- ^ . San Diego Union-Tribune. 31 August 2006. pp. E8.
