|Scientific Name:||Tor putitora|
|Species Authority:||(Hamilton, 1822)|
Barbus putitora Hora, 1939
Cyprinus putitora Hamilton-Buchanan, 1822
Tor putitora Tilak & Sharma, 1822
Originally described as Cyprinus putitora by Hamilton (1822). Barbus macrocephalus McClelland, 1839 and Cyprinus mosal Hamilton, 1822 are considered its synonyms. Hora (1939) placed the species under the subgenus Tor and the species was known as Barbus (Tor) putitora. Later Menon (1954) placed this under the genus Tor. The current nomenclature in use is Tor putitora.
|Red List Category & Criteria:||Endangered A4acde ver 3.1|
|Assessor/s:||Jha, B.R. & Rayamajhi, A.|
|Reviewer/s:||Rema Devi, K.R., Arunachalam, M., Dahanukar, N. & Daniel, B.A.|
Tor putitora is a widely distributed species in south and southeast Asia, with a restricted area of occupancy. However, the species is under severe threat from overfishing, loss of habitat, decline in quality of habitat resulting in loss of breeding grounds, and from other anthropogenic effects that have directly resulted in declines in harvest in several locations. In addition, with several dams planned for construction in the future in the Himalayan region, they could have a more drastic effect on tor populations blocking their migrations and affecting their breeding. Inferring population declines from observed cases with that of the trends across the entire distribution range, the species is estimated to have declined by more than 50% in the past and if the current trends continue and with the new dams being built, the population may decline even up to 80% in the future. The species is therefore assessed as Endangered and is in need of urgent conservation efforts to save it from becoming locally extinct in several locations.
The species has been reported from across the Himalayan region and elsewhere in south Asia and southeast Asia, ranging
David Edds reported the species from Nepal from Mulghat, on the road from Dharan to Hile, Kachali river confluence, Kahare, Sabha river confluence, just east of the Tumlingtar, Brahamadev, Andhi Mohan-Andhi river confluence, Piluwaa river confluence, Gorangi - about 4 km west of Chisapani, Khalte, Chapang, purchased at Koshi barrage, just east of Katasi, Khairenitar, Narayangarh.
Native:Afghanistan; Bangladesh; Bhutan; India (Assam, Bihar, Darjiling, Himachal Pradesh, Jammu-Kashmir, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim, Uttaranchal, Uttar Pradesh, West Bengal); Iran, Islamic Republic of; Nepal; Pakistan; Sri Lanka; Thailand
|Range Map:||Click here to open the map viewer and explore range.|
It is the most common mahseer of the Himalaya and is also sometimes known as the golden, yellow-finned, grey-hound or the thick-lipped mahseer. It grows up to 2.7 m.
Annual productivity of the species declined from 0.198 gm2 per year to 0.054 gm2 per year (73%) in the Tehri Dam located in the Garhwal Himalaya, India (Sharma 2004). Since it is a heavily fished species, population declines in the entire range is inferred to be anywhere between 40-50% over the last ten years.
Catches have declined in some areas (e.g. in the valley lakes around Pokhara, Nepal) due to overfishing.
|Habitat and Ecology:||Inhabits the montane and submontane regions, in streams and rivers. T. putitora is a major tor distributed in mid hills stretches of Himalayan region. It inhabits rapid streams with rocky bottom, riverine pools and lakes. It seems that Sahar neither inhabits the warm terai climate nor streams of very cold climate; but in natural conditions it inhabits moderately cold and climate regions of tropical highlands. The fish is a column feeder in freshwater found in pH ranges 7.4 - 7.9 and in subtropical condition 13°C-30°C. It is omnivorous in nature during their adult stage and feed on periphytic algae and diatoms in juvenile stage. The feeding and breeding habitats are lost almost throughout their distributional range.|
In Assam the population is fast depleting and at present are chiefly localised to certain major river systems and is fast approaching extinction in the streams and lakes of northern India. Large fishes are only found in some of the perennial pools.
This species is declining from its natural habitat due to urbanization, illegal encroachment, over fishing and chemical and physical alterations of their natural habitats.
Fishery productivity declined in the Tehri Dam in the Garhwal Himalaya, India. The stress on the population is not only due to its over exploitation, but also due to the rise in developmental activities, especially the growing number of hydroelectric and irrigation projects which have fragmented and deteriorated its natural habitat.
Further research is required in to the impact of threats, especially over-harvesting and habitat degradation.
The species has the potential for being ranched in rivers/artificial channels of Nepal and other countries of the Trans-Himalayan region.
At present, attempts to culture and conserve Tor spp. have been initiated in most trans-Himalayan countries to compensate for the decline. Strategies for preservation of existing stock by habitat conservation, development of seed production technology for restocking and culture have been undertaken to promote the population.
|Citation:||Jha, B.R. & Rayamajhi, A. 2010. Tor putitora. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 23 May 2013.|
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