Unique qualities and special problems of the African Great Lakes

  title={Unique qualities and special problems of the African Great Lakes},
  author={George W. Coulter and Brian R. Allanson and Michael Bruton and Peter Humphry. Greenwood and Rob C. Hart and Peter B. N. Jackson and Anthony J. Ribbink},
  journal={Environmental Biology of Fishes},
SynopsisThe African Great Lakes consist of large, deep rift valley lakes (e.g. Malawi & Tanganyika) and shallower lakes between the Eastern and Western Rifts (e.g. Victoria). They are a group comparable in size to the North American Great Lakes, but are old. Most are seasonally thermally stratified, and wind is the decisive factor that determines the annual cycle of cooling and mixing. Lakes Tanganyika, Malawi and Kivu are meromictic, with deep relict hypolimnia. Large magnitudes and time… 

African lakes and their fishes: conservation scenarios and suggestions

  • A. Ribbink
  • Environmental Science
    Environmental Biology of Fishes
  • 2004
It is recommended that captive propagation should be practised to conserve species and to retain the option of returning rescued taxa to the lake at a later date, assuming L. niloticus populations have been reduced.

Human-induced changes in the composition of fish communities in the African Great Lakes

  • J. Craig
  • Environmental Science
    Reviews in Fish Biology and Fisheries
  • 2004
There is a fundamental need to collect biological information on the fish communities of African lakes for effective management, resulting not only in the conservation of unique fish faunas but also the production of sustainable fish yields for the people relying on this source of protein.

The conservation of the fishes of Lake Victoria, Africa: an ecological perspective

  • M. Bruton
  • Environmental Science
    Environmental Biology of Fishes
  • 2004
An internationally funded research programme should be mounted on the African Great Lakes on the scale of the tropical forest biome project of the IUCN to prevent the same cycle of events from occurring, for example, in Lakes Tanganyika and Malawi.

The proportion of different eco-ethological sections of reproductive guilds of fishes in some African inland waters

SynopsisThe continent of Africa has a wide variety of inland waters ranging from rift valley lakes to endorheic and coastal lakes, floodplains and rivers. This paper makes a preliminary comparison of

Fish communities in the African Great Lakes

Biodiversities in the littoral/sublittoral zones of the very ancient, deep, clear, permanently stratified rift lakes Tanganyika and Malawi are contrasted with the simpler systems in their pelagic zones, also with biodiversity in the much younger, shallower Victoria, the world's largest tropical lake.

Dynamics of the haplochromine cichlid fauna and other ecological changes in the Mwanza Gulf of Lake Victoria

Lake Victoria, the largest tropical lake in the world (Fig. 6.1), was until recently a typical cichlid lake. Eighty percent of the demersal ichthyomass of this East African lake consisted of

The catfish fauna of Lake Victoria after the Nile perch upsurge

Of the two largest species, Clarias gariepinus and Bagrus docmak, juveniles disappeared faster than adults, indicates that predation by Nile perch may have played an important role in their decline, and the importance of catfishes for the fisheries in the lake is currently negligible.

Species Distinction and the Biodiversity Crisis in Lake Victoria

By studying cichlid communities, trophic groups, and individual species, researchers uncovered differential diversity in gross morphology and the presence of intraspecific variation that made it difficult to distinguish among species.

Evolution of the tribe Tropheini from Lake Tanganyika: synchronized explosive speciation producing multiple evolutionary parallelism

On the basis of phylogenetic analyses of the Tropheini, a lineage of endemic rock-dwelling cichlid fishes from Lake Tanganyika, a pathway of explosive speciation that accounts for a non-bifurcating manner of cladogenesis is suggested.

The nature of fish communities: A factor influencing the fishery potential and yields of tropical lakes and reservoirs

The discrepancy between high primary production and poor fish yields in some tropical reservoirs, especially in Souht East Asia, is apparently due to the fact that not all available trophic levels

Lake flies and sardines—A cautionary note

Thermal characteristics of standing waters: an illustration of dynamic processes

The principles of physical limnology in the Southern Hemisphere are no different to those in other parts of the world and the same mechanisms may be expected to be active in lakes of similar size and

A preliminary survey of the cichlid fishes of rocky habitats in Lake Malawi

Most aquarium fishes exported from Lake Malawi are cichlids of 10 rock-frequenting genera collectively referred to by their Chitonga name, Mbuna. These fishes provide a classical example of

The Ecological Differentiation of Two Closely Resembling Haplochromis Species From Lake Victoria (H. Iris and H. Hiatus ; Pisces, Cichlidae)

The results corroborate the biological validity of the species rank, which hitherto was based on morphology only, and lead to a discussion on bathymetric segregation as a speciation mode for lacustrine cichlids.

Classification and dynamic simulation of the vertical density structure of lakes1

Field data from two lakes of widely differing geometry and size are analyzed in terms of four nondimensional numbers which allow the principal mixing processes in each lake to be identified. The

Primary production and rates of algal growth in Lake Tanganyika1

The high fish production of the lake requires either very high trophic efficiency based on the measured pelagic primary production or an additional source of energy derived from the pcrcninlly anoxic deep water.

The phytoplankton and protozooplankton of the euphotic zone of Lake Tanganyika: Species composition, biomass, chlorophyll content, and spatio‐temporal distribution1

The seasonal cycle of phytoplankton and protozooplankton 1 iomass observed at two widely separated pelagic stations in the euphotic zone of Lake Tanganyika from February through November 1975 could

Changes in the Size Structure of Cichlid Populations of Lake Malaŵi Resulting from Bottom Trawling

A bottom trawl fishery, primarily for cichlids, was started in 1968 in southern Lake Malaŵi. Since then a dramatic change has occurred in the catch of cichlids from one dominated by large species to

Biomass, Production, and Potential Yield of the Lake Tanganyika Pelagic Fish Community

Abstract The Lake Tanganyika pelagic fish community consists of two short-lived clupeid species, of which Stolothrissa tanganicae is dominant, and four much larger, long-lived Lates species.