Synopsis
The body shape of the estuarine clupeidGilchristella aestuarius from the St. Lucia system is different from that of the same species in other estuaries. The morphology ofG. aestuarius is discussed in relation to long term food availability in the St. Lucia system.
References cited
Blaber, S.J.M. 1979. The biology of filter feeding teleosts in Lake St. Lucia, Zululand. J. Fish Biol. 15: 37–59.
Bowen, S.H. 1979. A nutritional constraint in detritivory by fishes: the stunted population ofSarotherodon mossambicus in Lake Sibaya. South Africa. Ecol. Monogr. 49: 17–31.
Bruton, M.N. & B.R. Allanson. 1974. The growth ofTilapia mossarnbica Peters (Pisces: Cichlidae) in Lake Sibaya, South Africa. J. Fish Biol. 6: 701–715.
Coetzee, D.J. 1978. A contribution to the ecology of the zooplankton of the Wilderness Lakes. PhD Thesis, University of Stellenbosch. 200 pp.
Day, J.H., N.A.H. Millard & G.J. Broekhuysen. The ecology of South African estuaries. Part IV: The St. Lucia system. Trans. roy. Soc. S. Afr. 34: 129–156.
Grassé, P.P. 1958. Traité de Zoologie. Tome XIII. Agnathes et poissons. Masson et Cie, Paris. 2758 pp.
Krebs, J.R. 1978. Optional foraging decision for predators. pp. 23–63. In: J.R. Krebs & N.B. Davies (ed.) Behavioral Ecology, an Evolutionary Approach, Blackwell Scientific Publications, Oxford.
O'Brien, J.W., N.A. Slade & G.L. Vinyard 1976. Apparent size as the determinant of prey selection by bluegill sunfish (Lepomis macrochirus). Ecology 57: 1304–1310.
Smith, J.L.B. 1965. The sea fishes of Southern Africa. Central News Agency. Cape Town. 580 pp.
Thayer, G.W.. W.E. Schaaf, J.W. Angelovic & M.W. LaCroix. 1973. Caloric measurements of some estuarine organisms. Fishery Bull. U.S. Fish Wildl. Serv. 71: 289–295.
Whitfield, A.K. 1980. A quantitative study of the trophic relationships within the fish community of the Mhlanga estuary, South Africa. Estuar. Coast. Mar. Sci. 10: 417–435.
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Blaber, S.J.M., Cyrus, D.P. & Whitfield, A.K. The influence of zooplankton food resources on the morphology of the estuarine clupeid Gilchristella aestuarius (Gilchrist, 1914). Environ Biol Fish 6, 351–355 (1981). https://doi.org/10.1007/BF00005764
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DOI: https://doi.org/10.1007/BF00005764