Fish Fauna of Asan River and Its Tributaries, Western Doon Valley, Dehradun (Uttarakhand), with Conservation Status of Species and Threats - Aquatic Ecosystem: Biodiversity, Ecology and Conservation - page 239

Conservation Status
IUCN Red List, least concern.

Distribution

Uttarakhand
Garhwal Division: Chamoli, Dehradun,
Haridwar, Pauri and Tehri districts; Kumaon
Division: Nainital and Pithoragarh districts.
Corbett Tiger Reserve and Rajaji National Park.

Remarks
Of no fi shery interest; kept in aquaria. It has been
found to be of great utility for larvicidal
purpose.
Genus: Raiamas Jordan, 1919

India
Confi ned to hilly areas of the northern provinces,
Arunachal Pradesh, Assam, Bihar, Haryana,
Himachal Pradesh, Odisha, Punjab, Uttar Pradesh
and West Bengal. Found in Kosi, Bagmati,
Gandak drainages in Bihar and headwaters of
Ganga river (in Uttarakhand). Introduced in
Maharashtra (in Lonavla lakes, Pune district).

18. Raiamas bola (Hamilton, 1822)
Cyprinus ( Barilius ) bola Hamilton, 1822. Fish.
Ganges: 274-275, 385 (type locality:
Brahmaputra).

English Name
Trout Barb.

Elsewhere
Bangladesh, Bhutan, Myanmar, Nepal and
Thailand.

Local Names
Balala, Bhola, Gulabi-machhli, Naulia.

Localities Surveyed
Asan River at Herbertpur, villages Fatehpur and
Partitpur near Herbertpur and Bhurpur near
Jhajra.

Habitat and Ecology
Found in rivers in clear streams with rocky beds
in submontane areas. It breeds during early mon-
soon season (June) in heavily inundated areas. It
breeds approximately after attaining three years
of age. Its wide mouth and streamlined body are
well suited for a predaceous life.

Diagnostic Characters
D. 3/8, P. 1/14, V. 2/8, A. 3/10, C. 19 (10/9). L.l.
87-90.
Body compressed; cleft of mouth deep, bar-
bels absent (rudimentary maxillary pair in juve-
niles); dorsal fi n origin ahead to that of anal fi n
and nearer to the caudal base than to snout tip;
scales small, lateral line complete. Body silvery
with 15-17 dark spots of varying size and shapes;
fi ns yellowish orange.
Sexual Dimorphism: In male, snout, subor-
bital bones and lower jaw densely covered with
tubercles, few tubercles on opercular region and
skin tip of lower jaw; scales on the body with
tubercles; outer few rays of pelvic fi n slightly
shorter; upper surface of outer few rays of dorsal
with fi ne tubercles. In female, head and body
smooth; outer rays of pelvic fi n slightly longer
than inner rays.

Conservation Status
IUCN Red List, least concern.

Threats
The population of this species seems to be
affected by destructive fi shing methods.

Remarks
Of fi shery and game interest.
Subfamily: Labeoninae
Genus: Bangana Hamilton, 1822

19. Bangana dero (Hamilton, 1822)
Cyprinus ( Bangana ) dero Hamilton, 1822. Fish.
Ganges: 277-278, 385, pl. 17, fi g. 78 (type
locality: Brahmaputra river)

Maximum Size
35.0 cm; weight 2.3 kg.

English Name
Kalabans.