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Hydrobiologia

, Volume 568, Supplement 1, pp 131–142 | Cite as

Evolution in ancient lakes: radiation of Tanganyikan atyid prawns and speciation of pelagic cichlid fishes in Lake Malawi

  • Geoffrey Fryer
Article

Abstract

Atyid prawns from Lake Tanganyika are still poorly understood. There are at least 11 species sharing an exceptionally small size and a reduction in the number of branchiae. The majority are benthic although some are pelagic. This is reflected in different morphologies of the body and walking legs. Morphological adaptions of the denticles on the chelipeds are adaptive as they relate to different ways of feeding. Pelagic fish from Lake Malawi do not represent an example of sympatric speciation as suggested by Shaw et al. (2000). It is more likely that several, independent radiations started from inshore generalists, which gradually adapted to the openwater.

Keywords

atyid prawns cichlid fish Lake Tanganyika Lake Malawi speciation adaptive radiation 

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Copyright information

© Springer 2006

Authors and Affiliations

  • Geoffrey Fryer
    • 1
  1. 1.Institute of Environmental and Biological SciencesLancaster UniversityLancasterUK

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