, 615:95 | Cite as

The Great Lakes in East Africa: biological conservation considerations for species flocks



The three largest water bodies of East Africa, Lake Victoria, Tanganyika, and Malawi contain an estimated number of 2,000 endemic cichlid fish species, in addition, to a mostly uncounted wealth of invertebrates. While the terrestrial diversity is reasonably well protected, as economic and touristic interests coincide with biological conservation strategies, this is not the case for most African lakes and rivers. Nonetheless, it must be promoted that these aquatic ecosystems also deserve protection. Conservation strategies for aquatic biota have so far been the same as for terrestrial environments, i.e., by declaring biodiversity hotspots national parks. Such parks also contain rivers and lake shores. Here, I argue that it seems questionable that this strategy will work, given strong micro-geographic structure of the species flocks and the great degree of local endemism. I suggest a novel strategy for protecting African Lake communities that accounts for local endemism, derived from recent molecular phylogenetic and phylogeographic studies on East African cichlid fishes. While connectivity is the major problem for terrestrial and marine national parks, to ensure a large enough effective population size of the protected animals, this is not the case in most taxa of African rivers and lakes, where local endemism prevails. For example, most littoral cichlid species are subdivided into numerous distinct “color morphs” with restricted distribution, and unlike marine fishes with planktonic larvae display brood care with small offspring numbers. It is argued that the establishment of “micro-scale protected areas,” a large number of small stretches of strictly protected coast line, each only some hundreds of meters long, is likely to work best to preserve the littoral communities in African lakes. Such protected zones can sustain a reasonably effective population size of littoral species, serve as protected spawning ground or nursery area for pelagic species, and at the same time re-seed neighboring populations that are exploited continuously. As long-term stability of littoral fishing grounds is in the immediate interest of village communities, such small protected areas should be managed and controlled by the local communities themselves, and supervised by governmental institutions.


Cichlid fishes Adaptive radiation Explosive speciation Protection National parks 



This opinion article would not have been possible without the long-term support of and the good relationships to the Department of Fisheries, Ministry of Agriculture and Cooperatives, Republic of Zambia. I would like to particularly thank C. Kapasa, P. Ngalande, H. Phiri, R. Sinyinza, D. Sinyinza, and L. Makasa. Likewise, I wish to thank Prof. L. Mumba, H. G. Mudenda, and C. Katongo from the Department of Biological Sciences at the University of Zambia at Lusaka, and T. Veall from Rift Valley Tropicals Ltd. for his discussion input on conservation issues. I am also obliged to B. Egger, M. Koch, S. Koblmüller, K. Sefc, S. Weiss, and two anonymous reviewers for their insightful comments on the manuscript. Financial support was provided by the Austrian Science Foundation (Grant 17680) and the European Science Foundation (Grant I48).


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© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Department of ZoologyUniversity of GrazGrazAustria

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