Scientific Facts

Tor douronensis   (Valenciennes, 1842) Semah mahseer Catalog of Fishes (gen., sp.) | ITIS | CoL Classification Actinopterygii | Cypriniformes | Cyprinidae Tor douronensis    Picture by CAFS Main reference  Zhou, W. and G.H. Cui. 1996. (Ref. 13848)Other references | Biblio | Coordinator | Collaborators Size / Weight / Age Max length : 35.0 cm TL male/unsexed; (Ref. 7050) Length at first maturity Lm 51.9, range 44 - 63.5 cm Environment Benthopelagic; freshwater; pH range: 7.7 - 8.7 Climate / Range Tropical; 18°C - 26°C (Ref. 56147) Distribution Asia: Thailand east to Viet Nam and south to Indonesia (Ref. 7050). Known from the Chao Phraya (Ref. 26336) and Mekong (Ref. 13848).Countries | FAO areas | Ecosystems | Occurrences | Introductions Short description Dorsal spines (total): 4; Dorsal soft rays (total): 7 - 9; Anal spines: 3; Anal soft rays: 5. Distinguished from other species of the genus in the Lancangjiang River by the following combination of characters: body compressed; median lobe of lower lip short, free margin truncate, not extending to a line connecting inner corners of mouth; eyes visible in ventral view; isthmus with small distinct scales, more than 18 scales between isthmus and origin of pelvic fin; gill rakers 15-20; supero-posterior margin of dorsal fin deeply concave; tip of anal fin pointed; color in life silvery, back dark, fins dark gray (Ref 13848). Biology Found in medium to large-sized rivers (Ref. 12975). Kept in ponds or cages in open water. Seldom seen in markets (Ref.7050). Multiple spawner (Ref. 56317). IUCN Red List Status (Ref. 84930) Threat to humans    Not Evaluated    Harmless