CICHLID fish of the genus Tilapia are of considerable importance in both natural fisheries and pond culture in many tropical and subtropical climates, particularly throughout Africa. Certain species have proved to be adaptable to varied environmental conditions, and consequently there has been a considerable artificial dispersion of species beyond their natural geographical range, as far afield as Malaya and Pacificislands, and including high-altitude waters in several parts of Africa. This transportation has brought into contact species which were hitherto geographically isolated, and due, at least in part, to this, there is an increasing number of records of hybridization. Lowe1 first directed attention to possible hybridization between T. nilotica (Linné) and T. nigra (Günther), and between T. nilotica and T. esculenta Graham in Uganda. Yashouv and Chervinsky2 have crossed T. nilotica and T. galilea (Artédi) in Israel, and Bard3 reports a hybrid between T. nilotica and T. machrochir Boulenger in culture ponds in the Cameroons. More recently, Hickling4,5 crossed a Malayan strain of T. mossambica Peters with another of the T. mossambica group from Zanzibar, and Mortimer6 has hybridized T. mossambica and T. andersoni (Castelnau) in culture ponds in Northern Rhodesia.
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Lowe, R. H., Rev. Zool Bot. Africa, 57, 1 (1958).
Yashouv, A., and Chervinsky, J., Nature, 184, 1739 (1959).
Bard, J., CCTA/CSA Symposium, Hydrobiology and Inland Fisheries (Lusaka, 1960) (in the press).
Hickling, C. F., Nature, 183, 287 (1959).
Hickling, C. F., J. Genet., 57, 1 (1960).
Mortimer, M. A. E., CCTA/CSA Symposium. Hydrobiology and Inland Fisheries (Lusaka, 1960) (in the press).
Whitehead, P. J. P., Nature, 187, 878 (1960).
Trewavas, E., and Greenwood, P. H., Nature, 188, 868 (1960).
Lowe, R. H., Rev. Zool. Bot. Africa, 55, 3 (1957).
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ELDER, H., GARROD, D. A Natural Hybrid of Tilapia nigra and Tilapia leucosticta from Lake Naivasha, Kenya Colony. Nature 191, 722–724 (1961). https://doi.org/10.1038/191722a0
Quantitative trait loci on LGs 9 and 14 affect the reproductive interaction between two Oreochromis species, O. niloticus and O. aureus
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