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M.J.P. Van Oijen

ECOLOGICAL DIFFERENTIATION AMONG THE PISCIVOROUS HAPLOCHROMINE CICHLIDS OF LAKE VICTORIA (EAST AFRICA) by M. J. P. VAN OIJEN (Rijksmuseum van Natuurlijke Historie, P.O. Box 9517, 2300 RA, Leiden, The Netherlands) SUMMARY Preliminary results of stomach content analysis of piscivorous

Martin Pickford

NEW FOSSIL ORYCTEROPODIDAE (MAMMALIA, TUBULIDENTATA) FROM EAST AFRICA. ORYCTEROPUS MINUTUS SP. NOV. AND ORYCTEROPUS CHEMELDOI SP. NOV. by MARTIN PICKFORD (Queen Mary College, University of London) SUMMARY Two new species of Orycteropus are described from Miocene deposits of Kenya. O. minutus

Egid F.B. Katunzi

permanent bodies of water. - J. Trop. Med. Hyg. 60: 250-256. GREENWOOD, P. H., 1957. A revision of Lake Victoria Hablochromis species (Pisces, Cichlidae), Part II. - Bull. Br. Mus. nat. Hist. (Zool.) 5: 73-97. GREENWOOD, P. H., 1981. The Haplochromine Fishes of the East African Lakes. Collected papers on

W. Ligtvoet, F. Witte, T. Goldschmidt, M.J.P. Van Oijen, J.H. Wanink and P.C. Goudswaard

areas of the lake changed considerably due to the stock replacements. KEY WORDS: Caridina nilotica, food web, haplochromine cichlids, Nile perch, predation, Rastrineobola argentea, species introduction, stock replacement. INTRODUCTION Lake Victoria, East Africa, the largest tropical lake in the world

Frans Witte and Jan H. Wanink

East African Lake Victoria followed the explosive population increase of the Nile perch (Lates niloticus), an introduced large predator (OGUTU-OHWAYO, 1990; WITTE et al., 1992a, b). In contrast to most of the formerly dominat- ing haplochromine cichlids, which were eradicated from the sublittoral

M. Pickford and A. Wilkinson

(Mammalia, Suidae) has previously been recorded from East Africa by ARAMBOURG (1933), HOOIJER (1963), WALKER (1969), MADDEN (1972) and BISHOP (1967). The material, originally assigned to Listriodon VON MEYER, 1846, was placed into the genus Bunolistriodon by ARAMBOURG in 1963. This material was collected

Adriaan Kortlandt

East Africa, dated about 1 million years ago, suggests that these giant buffalos had been driven into a swamp and then killed on the spot, which would almost certainly have required the use of spears. Thus the evolution and refinement of hominid bipedal gait may have been correlated with (and partly

P.H. Greenwood

the fishes of the north-eastern Atlantic and of the Mediterranean. 2 vols. J. C. HUREAU & Th. MONOD (Eds). UNESCO. 138 FRYER, G., 1972. Conservation of the Great Lakes of East Africa: a lesson and a warning. Biol. Conserv. 4: 256-262. GASTON, K. J. & J. H. LAWTON, 1990. The population ecology of

Christian Sturmbauer and Reinhard Dallinger

-tcrritoriality, feeding rhythm, algae feeders. INTRODUCTION Since their discovery at the turn of the century (BOULENGER, 1898) the assemblages of cichlid fishes in the East African Lakes Victoria, Ma- lawi and Tanganyika have fascinated evolutionary biologists (FRYER & ILES, 1972; GREENWOOD 1984; LOWE-MCCONNELL, 1987

E.L.M. Witte-Maas

, Cichlidae), Part III._Bull. Br. Mus. nat. Hist. (Zool.) 5: 179-218. _, 1967. Ibid. Part. VI._Bull. Br. Mus. nat. Hist. (Zool.) 15: 29-119. _, 1974. Cichlid fishes of Lake Victoria, East Africa; the biology and evolution of a species flock.-Bull. Br. Mus. nat. Hist. (Zool.) Suppl. 6: 1-134. _, 1980. Towards