eries. TA Reports 1960. 28 p. FAO, Rome.
Pruginin, Y. 1967. Report to the Government of Uganda on the experimental fish culture
project in Uganda, 1965-66. FAOIUNDP (Technical Assistance). Reports on Fisheries.
TA Reports 2446.19 p. FAO, Rome.
Pruginin, Y. 1968. The culture of carp and Tilapia hybrids in Uganda. FA0 Fish. Rep.
44(4): 223-229.
Pruginin, Y. and E.W. Shell. 1962. Separation of the sexes of Tilapia nilotica with a
mechanical grader. Prog. FishCult. 24: 37-40.
Pruginin, Y. and A. Arad. 1977. Fish farming in Malawi. FI:DP/MLW/71/516/10. 22 p.
FAO, Rome.
Pruginin, Y., S. Rothbard, G. Wohlfarth, A. Halevy, R. Moav and G. Hulata. 1975. All-
male broods of Tilapia nilotica x T. aurea hybrids. Aquaculture 6: 11-21.
Rabanal, H.R. and L.V. Hosillos. 1957. Control of less desirable fish competing with or
harmful to desirable indigenous species in inland waters in the Philippines. Paper pre-
sented at the Indo-Pacific Fisheries Council, 7th Session, 13-27 May 1957. Bandung,
Indonesia. IPFC/C 57/Tech./20. 23 p. FAO, Bangkok.
Rabelahatra, A. 1979. Rapport de Voyages d'Etudes sur L'aquaculture en IndonBsie, Phil-
ippines et Indes. Rep. Dem. Malagasy, Proj. DQveloppement P6ches Contin. et Aqua-
culture, Antananarivo. 68 p.
Radan, R.R. 1979. Tilapia: from nilotica and mossambica to a mutant called flamingo.
Greenfields (Philippines) 9(10): 24-40.
Rappaport, A., S. Sarig and M. Marek. 1976. Results of tests of various aeration systems
on the oxygen regime in Genosar experimental ponds and growth of fish there in
- Bamidgeh 28(3): 35-49.
Ray, L.E. 1978. Production of Tilapia in catfish raceways using geothermal water, p. 86- - In R.O. Smitherman, W.L. Shelton and J.H. Grover (eds.) Culture of exotic fishes
symposium proceedings. Fish Culture Section, American Fisheries Society, Auburn,
Alabama.
Redner, B.D. and R.R. Stickney. 1979. Acclimation to ammonia by Tilapia aurea. Trans.
Amer. Fish. Soc. 108: 383-388.
Reichle, D.F., R.V. O'Neill and W.F. Harris. 1975. Principles of energy and material
exchange in ecosystems, p. 27-43. In W.H. van Dobben and R.H. Lowe-McConnel
(eds.) Unifying concepts in ecology. Dr. W. Junk bv Publ., The Hague.
Reite, O.B., G.M.O. Maloiy and B. Aasehaug. 1974. pH, salinity and temperature tolerance
of Lake Magadi Tilapia. Nature (London) 247: 315.
Ricardo, C.K. 1939. The fishes of Lake Rukwa. J. Linn. Soc. London, Zool. 40: 625-657.
Ricardo-Bertram, C.K. 1943. The fishes of the Bangweulu region. J. Linn. Soc. London,
Zool. 41: 183-217.
Richards, W.J. 1976. Some comments on Balon's terminology of fish developmental
intervals. J. Fish. Res. Board Can. 33: 1253-1254.
Ricklefs, R. 1973. Ecology. Chiron Press, Scranton, Pennsylvania.
Ridley, M. 1978. Paternal care. Anim. Behav. 26: 904-932.
Riedel, D. 1965. Some remarks on the fecundity of Tilapia (T. mossambica Peters) and its
introduction into Middle Central America (Nicaragua) together with a first contribu-
tion towards the limnology of Nicaragua. Hydrobiologia 25: 357-388.
Rifai, S.A. 1979. The use of aquatic plants as feed for Tilapia nilotica in floating cages,
p. 61-64. In Proc. Int. workshop on pen and cage culture of fish. International
Developme~t Research Centre, Canada and Aquaculture Dept. Southeast Asian
Fisheries Development Center, Iloilo, Philippines.
Rifai, S.A. 1980. Control of reproduction of Tilapia nilotica using cage culture. Aqua-
culture 20: 177-185.
Roberts, R.J. 1975. Experimental pathogenesis of lymphocystis in the plaice (Pleura-
nectes platessa), p. 431-442. In Wildlife diseases. Plenum Press, New York.
Roberts, R.J. and P. Matthiessen. 1979. Pathological findings in fishes of the Okavangu
swamp, Botswana, following Endosulphan spraying. ODM Special report. UK Minis-
try of Overseas Development, London. 9 p.
Robertson, D.H. 1979. Host-parasite interactions between Ichtyobodo necator (Henne-
guy 1883) and farmed salmonids. J. Fish Dis. 2: 481-493.