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''Oreochromis'' is a large genus of tilapiine cichlids, fishes endemic to Africa and the Middle East. Several species from this genus have been introduced far outside their native range, and are important in aquaculture. Members of this genus, as well as those of the genera ''Tilapia'' and ''Sarotherodon'', share the common name "tilapia". The genus contains more than 30 species, and numerous undescribed forms exist. Judging from mtDNA sequence analysis, several clades seem to exist. In addition, some species (such as ''Oreochromis urolepis'' and the blue tilapia ''O. aureus'') seem closer to ''Sarotherodon'' according to the mtDNA data. Research is hampered because hybridization runs rampant in these fishes, which confounds mtDNA data (see discussion at Wami tilapia), and the fast speed of evolution makes choice of appropriate nuclear DNA sequences difficult.〔(Nagl ''et al.'' 2001)〕 ==Species== The 38 recognized species in this genus are: * ''Oreochromis amphimelas'' (Hilgendorf, 1905) * ''Oreochromis andersonii'' (Castelnau, 1861) (three-spotted tilapia) * ''Oreochromis angolensis'' (Trewavas, 1973) * ''Oreochromis aureus'' (Steindachner, 1864) (blue tilapia) * ''Oreochromis chungruruensis'' (C. G. E. Ahl, 1924) * ''Oreochromis esculentus'' (M. Graham, 1928) (Singida tilapia) * ''Oreochromis hunteri'' Günther, 1889 (Lake Chala tilapia) * ''Oreochromis ismailiaensis'' Mekkawy, 1995 * ''Oreochromis jipe'' (R. H. Lowe, 1955) (Jipe tilapia) * ''Oreochromis karomo'' (Poll, 1948) (karomo) * ''Oreochromis karongae'' (Trewavas, 1941) * ''Oreochromis korogwe'' (R. H. Lowe, 1955) (Korogwe tilapia) * ''Oreochromis lepidurus'' (Boulenger, 1899) * ''Oreochromis leucostictus'' (Trewavas, 1933) * ''Oreochromis lidole'' (Trewavas, 1941) * ''Oreochromis macrochir'' (Boulenger, 1912) (longfin tilapia) * ''Oreochromis mortimeri'' (Trewavas, 1966) (Kariba tilapia) * ''Oreochromis mossambicus'' (W. K. H. Peters, 1852) (Mozambique tilapia) * ''Oreochromis mweruensis'' Trewavas], 1983 * ''Oreochromis niloticus'' (Linnaeus, 1758) (Nile tilapia) * ''Oreochromis placidus'' (Trewavas, 1941) * * ''Oreochromis placidus placidus'' (Trewavas, 1941) (black tilapia) * * ''Oreochromis placidus ruvumae'' (Trewavas, 1966) * ''Oreochromis rukwaensis'' (Hilgendorf & Pappenheim, 1903) (Lake Rukwa tilapia) * ''Oreochromis saka'' (R. H. Lowe, 1953) * ''Oreochromis salinicola'' (Poll, 1948) * ''Oreochromis schwebischi'' (Sauvage, 1884) * ''Oreochromis shiranus'' Boulenger, 1897 * * ''Oreochromis shiranus chilwae'' (Trewavas, 1966) (Chilwa tilapia) * * ''Oreochromis shiranus shiranus'' Boulenger, 1897 * ''Oreochromis spilurus'' (Günther, 1894) * ''Oreochromis spilurus niger'' (Günther, 1894) (Athi River tilapia) * ''Oreochromis spilurus percivali'' (Boulenger, 1912) (Buffalo Springs tilapia) * ''Oreochromis spilurus spilurus'' (Günther, 1894) (Sabaki tilapia) * ''Oreochromis squamipinnis'' (Günther, 1864) * ''Oreochromis tanganicae'' (Günther, 1894) * ''Oreochromis upembae'' (Thys van den Audenaerde, 1964) * ''Oreochromis urolepis'' (Norman, 1922) * * ''Oreochromis urolepis hornorum'' (Trewavas, 1966) (Wami tilapia) * * ''Oreochromis urolepis urolepis'' (Norman, 1922) (Rufigi tilapia) * ''Oreochromis variabilis'' (Boulenger, 1906) (Victoria tilapia) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oreochromis」の詳細全文を読む スポンサード リンク
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