\n''Gymnocypris stewartii'' (Lloyd, 1908)"}},"i":0}}]}" id="mwBA">
Oxygymnocypris stewartii | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Cypriniformes |
Family: | Cyprinidae |
Genus: | Oxygymnocypris W. H. Tsao, 1964 |
Species: | O. stewartii |
Binomial name | |
Oxygymnocypris stewartii (Lloyd, 1908) | |
Synonyms | |
Schizopygopsis stewartiiLloyd, 1908 Contents |
Oxygymnocypris stewartii is a species of cyprinid fish endemic to Tibet [2] and occurs in the Yarlung Tsangpo River (=upper Brahmaputra) and its tributaries at altitudes above 3,600 m (11,800 ft) in the Qinghai-Tibet Plateau. [1] [3] It is the only species in its genus. [4]
Oxygymnocypris stewartii grows to 59 cm (1.94 ft) in standard length, [3] 67.6 cm (2.22 ft) in total length and 3 kg (6.6 lb) in weight. [2] It is a long-lived (to 25 years), late-maturing species that reproduces annually. [3]
Oxygymnocypris stewartii inhabits the deeper areas of clear, fast-flowing rivers with a rocky substrate. [1] It is a generalized and opportunistic predator feeding both on fish and aquatic insects. Smaller specimens feed mostly on cobitid nemacheilid loaches and caddisflies of family Hydropsychidae, whereas larger individuals switch more towards cyprinid fishes and chironomid larvae. Triplophysa stenura is the most prevalent prey species, present in 47% of stomachs, but Schizopygopsis younghusbandi contributes most (59%) to prey weight. Insects are more important in winter and spring, and fishes in summer and autumn. [3]
Oxygymnocypris stewartii is heavily used as a food fish and is thought to be overfished. [1]
Lake Tana is the largest lake in Ethiopia and the source of the Blue Nile. Located in Amhara Region in the north-western Ethiopian Highlands, the lake is approximately 84 kilometres long and 66 kilometres wide, with a maximum depth of 15 metres, and an elevation of 1,788 metres. Lake Tana is fed by the Gilgel Abay, Reb and Gumara rivers. Its surface area ranges from 3,000 to 3,500 square kilometres, depending on season and rainfall. The lake level has been regulated since the construction of the control weir where the lake discharges into the Blue Nile. This controls the flow to the Blue Nile Falls and hydro-power station.
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Schizopygopsis is a genus of cyprinid fish. Most species are endemic to river basins in the Himalayas and Qinghai–Tibet Plateau of China, but S. stoliczkai extends into the highlands of Afghanistan, Iran, northern India, Kyrgyzstan, Pakistan and Tajikistan.
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