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Environmental Biology of Fishes

, Volume 27, Issue 3, pp 215–233 | Cite as

The feeding habits of a group of herbivorous rock-dwelling cichlid fishes (Cichlidae: Perciformes) from Lake Malawi, Africa

  • Peter N. Reinthal
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Synopsis

The feeding; habits of a group of tropical herbivorous rock-dwelling cichlid fishes from Lake Malawi, Africa, are investigated using stomach content analyses. The various species fed selectively on the periphyton of the rocky shores. Blue-green alga of the genus Calothrix was the most common item ingested by the group. Diatoms (Chrysophyta) also were abundant food items. Discriminant analysis showed that dietary items were good variables to identify species. Interspecific dietary differences showed a continuum from those species feeding primarily on Calothrix to those feeding primarily on diatoms. Algal resources exhibit distinct patterns of spatial variation. Diet was correlated with foraging behavior and trophic morphology. Interspecific differences in diet could possibly facilitate ecological coexistence among various species. Such coexistence would contribute to the maintenance of the high diversity fish faunas characteristic of the Great Rift Lakes of Africa.

Key words

Stomach contents Foraging Algae Periphyton Trophic relationships Herbivory 

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References cited

  1. Bold, H.C. & M.J. Wynne. 1984. Introduction to Algae, 2ed. Prentice-Hall, Englewood Cliffs. 720 pp.Google Scholar
  2. Fryer, G. 1959. The trophic inter-relationships and ecology of some littoral communities of Lake Nyasa with especial reference to the fishes, and a discussion of the evolution of a group of rock-frequenting Cichlidae. Proc. Zool. Soc. Lond. 132: 153–281.Google Scholar
  3. Fryer, G. 1977. Evolution of species flocks of cichlid fishes in African lakes. Z. zool. Syst. Evolut.-forsch. 15: 141–165.Google Scholar
  4. Fryer G. & T.D. Iles. 1972. The cichlid fishes of the Great Lakes of Africa. Their biology and evolution. Oliver & Boyd, Edinburgh. 641 pp.Google Scholar
  5. Greenwood, P.H. 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.Google Scholar
  6. Grossman, G.D. 1986. Food resource partitioning in a rocky intertidal fish assemblage. J. Zool., Lond. (B) 1: 317–355.CrossRefGoogle Scholar
  7. Levins, R. 1968. Evolution in changing environments Princeton University Press, Princeton. 120 pp.Google Scholar
  8. Lewis, D.S.C., P. Reinthal & J. Trendall. 1986. A guidebook to the cichlid fishes of Lake Malawi National Park. Creda Press, Johannesburg. 71 pp.Google Scholar
  9. Liem, K. 1980. Adaptive significance of intra- and interspecific differences in the feeding repertoires of cichlid fishes. Amer. Zool. 20: 295–314.Google Scholar
  10. Linton, L.R., R.W. Davies & F.J. Wrona. 1981. Resource utilization indices: assessment. J. Anim. Ecol. 50: 282–292.Google Scholar
  11. McKaye, K.R. & A.C. Marsh. 1983. Food switching by two specialized algae-scraping cichlid fishes in Lake Malawi, Africa. Oecologia 56: 245–248.CrossRefGoogle Scholar
  12. Marsh, A.C. & A.J. Ribbink. 1985. Feeding-site utilization in three sympatric species of Petrotilapia (Pisces, Cichlidae) from Lake Malawi. Biol. J. Linn. Soc. 25: 331–338.Google Scholar
  13. Meyer, A. 1989. Ecological and evolutionary aspects of a trophic polymorphism in the Neotropical cichlid Cichlasoma citrinellum (Pisces, Cichlidae). Biol. J. Linn. Soc. (in press).Google Scholar
  14. Moriarty, D.J.W. 1973. The physiology of digestion of bluegreen algae in the cichlid fish, Tilapia nilotica. J. Zool. (Lond.) 171, 25–39.Google Scholar
  15. Power, M.E. 1983. Grazing responses of tropical freshwater fishes to different scales of variation in their food. Env. Biol. Fish. 9: 103–115.CrossRefGoogle Scholar
  16. Reinthal, P.N. 1987. Morphology, ecology and behavior of a group of rock-dwelling cichlid fishes (Cichlidae, Perciformes) from Lake Malawi, Africa. Ph.D. Dissertation, Duke University, Durham. 305 pp.Google Scholar
  17. Reinthal P.N. 1989. Morphological analyses of the neurocranium of a group of rock-dwelling cichlid fishes (Pisces, Cichlidae) from Lake Malawi, Africa. Zool. J. Linn. Soc. (in press).Google Scholar
  18. Ribbink, A.J., B.A. Marsh, A.C. Marsh, A.C. Ribbink & B.J. Sharp. 1983. A preliminary survey of the cichlid fishes of rocky habitats in Lake Malawi. S. Afr. J. Zool. 18: 149–310.Google Scholar
  19. Sage, R.D. & R.K. Selander. 1975. Trophic radiation through polymorphism in cichlid fishes. Proc. Nat. Acad. Sci. U.S.A. 72: 4669–4673.CrossRefGoogle Scholar
  20. Sharp, B. 1981. An ecological study of territoriality in four cichlid species resident on rocky shores near Monkey Bay, Lake Malawi. M.Sc. Thesis, Rhodes University, Grahamstown. 186 pp.Google Scholar
  21. Shulman, M.J. 1983. Species richness and community predictability in coral reef fish faunas. Ecology 64: 1308–1310.CrossRefGoogle Scholar
  22. Trewavas, E. 1935. A synopsis of the cichlid fishes of Lake Nyasa. Ann. Mag. nat. Hist.(10) (10) 16: 65–118.Google Scholar
  23. Twombly, S. 1983. Seasonal and short-term fluctuations in zooplankton abundance in tropical Lake Malawi. Limnol. Oceanogr. 28: 1214–1224.CrossRefGoogle Scholar
  24. Van Meel, L. 1954. Le phytoplankton. Exploration Hydrobiologique du Lac Tanganyika, v.IV (1), Institute Royal des Sciences Naturelles du Belgique, Brussels. 681 pp.Google Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Peter N. Reinthal
    • 1
  1. 1.Department of ZoologyDuke UniversityDurhamUSA

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