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Barbus calidus : ウィキペディア英語版 | Barbus calidus
''Barbus calidus'', the Clanwilliam redfin, is a ray-finned fish species in the family Cyprinidae. It is placed in the "wastebin genus" ''Barbus'' – the typical barbels and relatives – by default. But actually it is far less closely related to the typical barbels than to the South African redfins in ''Pseudobarbus'', and may well belong in the latter genus. Like ''Pseudobarbus'' but unlike most other African "barbs", it is tetraploid. Its closest living relative is probably the Twee River redfin (''B. erubescens'').〔de Graaf ''et al.'' (2007)〕 ==Distribution and ecology== It is endemic to the Western Cape Province of South Africa, where it occurs in the upper Olifants River and its tributaries – the Biedou, Boontjies, Boskloof, Breekkrans, Driehoeks, Dwars, Eselbank, Jan Dissels, Matijes, Noordhoeks, Oudste, Ratels, Rondegat, Thee and Tra Tra Rivers – near Clanwilliam and Keerom.〔Impson & Swartz (2007)〕 It inhabits the pools and shallower water in larger clear and slightly acidic mountain streams. They are insectivores, eating mainly small mayflies (Baetidae), non-biting midges (Chironomidae) and ants (Formicidae). The breeding season is lengthy and lasts most of the summer, from November to January. Schools of adults form to migrate to shallow pools with slow-moving water and spawn between rocks and boulders, depositing the eggs in crevices between these.〔
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