Habitat:
Glyptothorax trewavasae is endemic to the Western
Ghats of India (Dahanukar et al. 2004). It is known
from Maharashtra and Karnataka. In Maharashtra it
is known from Koyna valley and Yenna (Venna) valley
(Hora 1938) and Koyna river near Patan (Jadhav et
al. 2011). In Karnataka it is known from Shimoga (Hora
1938) and Kigga falls on Tunga river (Arunachalam
2000). This species is also expected to be present
in the hill streams of areas between the known localities.
The expected extent of occurrence (EOO) of this species
will be around 40000 km2, however, as the species
is restricted to hill streams with rapid water flow
and is habitat specific, the area of occupancy of
the fish may be hardly 2000 km2 (5% of EOO). Description:
Rayed dorsal fin inserted above posterier half of
pectoral fin, origin nearer adipose than to end of
snout, spine strong and smooth. Adipose dorsal fin
base equal to that of dorsal. Pectoral fin not reaching
pelvic fin, spine strong, serrated with 11 antrose
teeth along inner margin and with retrorse teeth along
outer margin. Colouration: Uniform
light gray with pectoral, dorsal, adipose and caudal
bases dark. Some portions of certain rays of dorsal,
anal and pelvics black, distal portion of caudal fin
dark tipped with lighter colour. Habitat:
Inhabits mountain rapids. Remarks:
Even though the expected EOO of Glyptothorax trewavasae
is large the species is assessed as Vulnerable because
of its restricted area of occupancy and its presence
in only five locations. The species is also very rare.
Furthermore, deforestation, siltation and organic
pollution can change the specific habitat requirement
and are major threats to the species. Currently the
species is known only from 5 localities and is therefore
put in the vulnerable catagory (IUCN 2010).
Common
Name:
None
Synonyms:
None
Family:
Sisoridae
Distribution:
Asia:
Krishna river system in Western Ghats, India. Type
locality: Yenna Valley, Satara dist., Maharashtra,
India.
Size:
12.0cm. (4¾ins)
Temp:
18-24°c (63-75°f.)
p.H.
6.0-7.0.
Reference:
Talwar, P.K. and A.G.
Jhingran, 1991.
Inland fishes of India and adjacent countries. Volume
2. A.A.Balkema, Rotterdam. Jayaram; K.C. Catfishes of India,
Narendera Publishing House. p.253. Dahanukar, N. 2011. Glyptothorax
trewavasae. The IUCN Red List of Threatened Species
2011. Froese, R. and D. Pauly. Editors.
2019. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 12/2019 ). Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa
1418:1-628.
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