Himantura walga   (Muller & Henle,  1841) (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Elasmobranchii
Order:Rajiformes
Family:Dasyatidae

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Description
Size: 16-46 cm disc width

Colour : Dull grey or brown above, whitish below.

A sub-circular disc is present that is longer than broad; snout pointed and acutely projecting; spiracles are almost equal to eyes and are located behind eyes. Mouth is undulated with 2 bucal processes on floor of mouth; tail is whip like and slightly longer than the disc length with 1 or 2 large serrated spines; inter-orbital space concave. A series of small spines between root of tail and caudal spine.

Dioecious, internal (oviduct) fertilization, internal live bearers. Ovoviviparous, with histotrophy. Gives birth to litters of 1-2 pups; no reproductive synchronicity. Distinct pairing with embrace. Breeds in winter season.


Synonym (s)
Dasyatis walga (Muller & Henle, 1841)
(Senior synonym)
Himantura heterurus (Bleeker, 1852)
(Junior synonym)
Himantura imbricata (non Bloch & Schneider, 1801)
(Misapplied name)
Himantura walga (Muller & Henle, 1841)
(Senior synonym)
Trygon heterurus Bleeker, 1852
(Junior synonym)
Trygon walga Muller & Henle, 1841
(Senior synonym)

Common Name (s)
• Scaly Stingray (English)
• Isacurrah Tenkee (Telugu)
• Tenkee Shindraki (Telugu)
• Thirachi (Telugu)
• Sankucha
• Dwarf Whipray (English)
• Tenkee Shidraki (Telugu)
Economic Importance and Threats
Importance:  Commercial
(Fisheries, utilized for its meat.)

Ecology
Habitat:  Demersal, Coastal
Trophic Level:  Tertiary Consumer
Prey:  Feeds on teleosts (Coilia dussumieri), crustaceans (Solenocera spp., Metapenaeus affinis, N. tenuipes) & crabs
IUCN Status:  NearThreatened

Biogeography


• Andhra Pradesh, Vishakhapatnam INDIA (Record: 00/10/1999-00/11/2000)
• Tamil Nadu, Chennai Coast INDIA (Record: 2003)
• Tamil Nadu, Gulf of Mannar INDIA (Record: 2003)
• INDIA (Record: 2009)
• Red Sea (Record: 2009)
• SRI LANKA (Record: 2009)
• Orissa, Chilika Lagoon INDIA (Record: 2009)
• Red Sea
• SRI LANKA
• East Coast INDIA

Literature Source(s)
  • Venkatraman, K; Srinivasan, M; Satyanarayana, CH and Prabhakar D (2002) Faunal diversity of Gulf of Mannar biosphere reserve Conservation area series 15 ZSI 77 pp; VIII pla Available at - NCL, Pune
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org
  • Sujatha, K (2002) Batoid fishes off Visakhapatnam, north east coast of India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 44(1 & 2) 155-162 Available at - NIO, Goa
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu Available at - http://tnenvis.nic.in
  • 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
  • (2003) Wild Singapore Available at - http://www.wildsingapore.com
  • Satapathy, D and Panda, S (2009) Fish atlas of Chilika Chilika Development Authority, Bhubaneswar 74 pp Available at - NIO, Goa
  • 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

Page last updated on:2011-03-31

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