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Lake Victoria formerly was very rich in fish, including many endemics, but a high percentage of these became extinct since the 1940s. [39] The main group in Lake Victoria is the haplochromine cichlids (Haplochromis sensu lato) with more than 500 species, almost all endemic, [23] [40] [41] and including an estimated 300 that still are ...
Oreochromis variabilis, the Victoria tilapia, is a species of African cichlid native to Lake Victoria and its tributaries, Lake Kyoga, Lake Kwania, and Lake Bisina (Salisbury), as well as being found in the Victoria Nile above Murchison Falls. This species can reach a standard length of 30 cm (12 in).
The cichlid Haplochromis thereuterion is endemic to Lake Victoria.. In 1927-1928 Michael Graham conducted the first ever systematic Fisheries Survey of Lake Victoria.The dominant species in the 1927–8 survey catches were two, now critically endangered tilapia species, the 'Ngege' or Singida tilapia (Oreochromis esculentus) and Victoria tilapia (O. variabilis).
The researchers identified four places globally with the largest number of threatened freshwater species: Lake Victoria in Africa, Lake Titicaca in South America and regions in western India and ...
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Amarinus lacustris (as Hymenosoma lacustris) in Chilton's 1914 description of a specimen from Norfolk Island. Amarinus lacustris grows to a maximum size of 10 millimetres (0.39 in) across the carapace, with a leg span of 20 mm. [5] [6] The carapace is grey-brown and almost circular, marked with a set of grooves forming an H-shape with the two uprights bending outwards, and the whole animal is ...
During his survey of Lake Victoria, Michael Graham recorded fifty-eight species of Haplochromis including many new species. [2] While Graham regretted that the enormous haplochromine population was not really 'useful', he warned against introduction of a large predator that could convert these small fish – which the colonial fisheries officers called trash fish – into large fish that could ...
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