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O. variabilis

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Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (4): 442–450.
Published: 15 November 2010
.... variabilis , the two native forms of the LVR and original principals of the fisheries of these waters, were found to be completely displaced from the major lakes and were only occasionally found in a few minor satellite lakes surrounding Lakes Kyoga and Victoria. Nile tilapia, O. niloticus , is now...
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Published: 15 November 2010
(Napoleon Gulf); NG = Lake Victoria (Winam Gulf); NW = L. Nawampasa; NY = L. Nyaguo; VI = L. Victoria; VNL = Victoria Nile; Species: E = O. esculentus ; L = O. leucostictus ; N = O. niloticus ; V = O. variabilis . More
Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (1): 3–10.
Published: 26 February 2010
... supported a multi-species fishery dominated by the tilapiine cichlids Oreochromis esculentus (Graham) and O. variabilis (Boulenger) and over 200 species of haplochromine cichlids ( Kudhongania and Cordone, 1974 ; Ogutu-Ohwayo, 1990 ; Goudswaard and Witte, 1997 ; Goudswaard et al., 2002 ). Other...
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Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (3): 277–283.
Published: 31 August 2010
... Oreochromis esculentus (Graham) 3.18 O. variabilis (Boulenger) 0.12 O. niloticus (L.) 0.5 0.03157 0.8 0.82 1.1 1.15 1.39 O. leucostictus (Trewavas) Tilapia zillii (Gervais) 0.02 Bagrus docmak (Forsskall) 5.35 1.16793 0.2 0.2 0.04 0.03...
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Journal Article
Aquatic Ecosystem Health & Management (2003) 6 (3): 299–310.
Published: 01 September 2003
...-1980s (Figure 2), due, in part, to predation by Nile perch. Ore- ochromis niloticus on the other hand, hybridised and competed for food and space with O . variabilis and O . esculentus, leading to the decline of endemic tilapiines. It is believed that more than 60% of Lake Victoria s en- demic fish...
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 443–448.
Published: 28 November 2007
.... leucostictus (Graham), Tilapia zillii (Gervais) and Tilapia melanopleura (Dumeril), it then quickly out competed the other endemic tilapiines, namely: O. esculentus (Graham) and O. variabilis (Boulenger). It subsequently became the dominant tilapiine in Lake Victoria ( Welcomme, 1967 ; Trewavas, 1983...
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Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 458–466.
Published: 28 November 2007
... and O. variabilis ( Graham, 1929 ; Greenwood, 1974 , 1981 ; Witte and Van Oijen, 1990 ). In the 1950s, the fishery targeted the tilapiines and Labeo victorianus ( Worthington, 1933 ; Cadwalladr, 1965 ; Fryer, 1973 ). Other local fisheries existed for Protopterus aethiopicus , Bagrus docmak...
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Journal Article
Aquatic Ecosystem Health & Management (2011) 14 (3): 252–259.
Published: 01 July 2011
.... and Tweddle , D. 92 – 98 . Uganda : LVFRP . Balirwa , J. S. , Chapman , C. A. , Chapman , L. J. , Cowx , I. G. , Geheb , K. , Kaufman , L. , Lowe-McConnell , R. H. , Seehausen , O. , Wanink , J. H. , Welcomme , R. L. and Witte , F. 2003...
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Journal Article
Aquatic Ecosystem Health & Management (2014) 17 (1): 70–79.
Published: 02 January 2014
... of the most important species, the endemic tilapias Oreochromis esculentus and O. variabilis , had collapsed by 1940 because of overfishing (Kudhongania and Chitamwebwa, 1995 ). Attempts were made in the 1950s and 1960s to rehabilitate Lake Victoria's fisheries by introducing non-native Tilapia species...
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Journal Article
Aquatic Ecosystem Health & Management (2005) 8 (1): 95–104.
Published: 01 January 2005
... by A. aphanizomenoides bloom events. In 1998, the phytoplanktonic succession was widely different. The dominant cyanobacteria was O. chlorina , which bloomed in spring (February–June), with a maximum biomass of 57 mg FW l − 1 (84% of total biomass) and remained dominant until the beginning of the autumn...
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Journal Article
Aquatic Ecosystem Health & Management (2000) 3 (1): 105–135.
Published: 01 January 2000
... , O. 263 – 268 . Chichester, , UK : Elliss Horwood . In Loftus , D.H. and Hulsman , P.F. 1986 . Predation on larval whitefish ( Coregonus clupeaformis ) and lake herring ( C. artedii ) by adult rainbow smelt ( Osmerus mordax ) . Can. J. Fish. Aquat. Sci. , 43 : 812 – 818...
Journal Article
Aquatic Ecosystem Health & Management (2008) 11 (1): 42–49.
Published: 10 March 2008
.... niloticus in bottom trawl surveys in Lake Victoria, Kenya. a) 1998–2000, b) 2004–2005. Vertical arrows indicate mean length at 50% maturity ( Lm 50 ) and horizontal arrows indicate legally acceptable sizes. Figure 3. Length frequency distribution of O. niloticus in trawl surveys in Lake...
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Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 434–442.
Published: 28 November 2007
... and by 1965 it featured prominently in commercial fish catches ( Welcomme, 1967 ). Currently, O. niloticus is the most important tilapiine; whereas the native species of Oreochromis variabilis (Boulenger) and Oreochromis esculentus (Graham) have largely disappeared ( Witte and Van Densen, 1995 ; Cowx...
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Journal Article
Aquatic Ecosystem Health & Management (2013) 16 (2): 164–171.
Published: 01 April 2013
... the rainy season, particularly in D. R. Congo, to increase food security as well as revenues. It is further recommended to study the possibility of culturing the local Tanganyikan Tilapia, Oreochromis tanganicae, to prevent the Nile Tilapia ( O. niloticus ) from being used in cage culture on Lake...
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Journal Article
Aquatic Ecosystem Health & Management (2008) 11 (3): 310–320.
Published: 25 August 2008
... in lakes . Verh. Internat. Verein. Limnol. , 27 : 3358 – 3362 . Dieter , C. D. 1990 . The importance of emergent vegetation in reducing sediment resuspension in wetlands . Journ. Freshwat. Ecol. , 5 : 467 – 473 . Ferrara , O. and Margaritora , F. G. 1982 . Attuali...
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Journal Article
Aquatic Ecosystem Health & Management (2014) 17 (1): 41–51.
Published: 02 January 2014
... . Matthes , H. 1960 . Les communautés écologiques des poissons Cichlidae au Lac Tanganyika (Ecological communities of Lake Tanganyika cichlids fish. In French.) . Folia. Sci. Afr. Centralis , 6 : 8 – 12 . Mölsä , H. , Reynolds , J. E. , Coenen , E. and Lindqvist , O. V...
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Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (4): 413–428.
Published: 15 November 2010
... polymorpha) in shallow waters of northeastern Lake Erie ”. In Zebra Mussels: biology, impacts, and control , Edited by: Nalepa , T. and Schloesser , D. 399 – 413 . Boca Raton, Florida : Lewis Publishers . Dermott , R. , Johannsson , O. , Munawar , M. , Bonnell , R...
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Journal Article
Aquatic Ecosystem Health & Management (1999) 2 (3): 255–269.
Published: 01 January 1999
... be in a less preferred habitat. For example, in 1996, a deepwater sculpin (Myoxocephalus thompsoni) was caught at Site 2 (30 m) in the outlet basin. This documented the reap- pearance, and signalled the possible resurgence, of this glacial relict species in Lake Ontario, where it was thought o be extirpated...
Journal Article
Aquatic Ecosystem Health & Management (2006) 9 (2): 185–202.
Published: 01 July 2006
..., R     Caulerpa verticillata J. Agardh W, E, Sb, Sn C, R, E Family Codiaceae     Codium arabicum Kutzing W, Sn D     Codium geppiorum O. Schmidt W, E, Sn C, E, S     Codium tomentosum Stackhouse E, P C, R Family Halimedaceae     Halimeda discoidea Decaisne Sb R...
Journal Article
Aquatic Ecosystem Health & Management (2004) 7 (4): 475–490.
Published: 01 October 2004
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