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105 results for “Lake Victoria”
Distribution. Five disjunct regions: Guinean and Sahelian savannas in W Africa (Guinea and Liberia E to Niger and Nigeria); White Nile valley (Sudan, South Sudan, and NE DR Congo); around Lake Victoria (Uganda, Kenya, and Tanzania); a narrow strip along the E African coast between Mombasa and Dar es Salaam; and SW shore of Lake Tanganyika in NE Zambia, based on a reidentification in 2010 of two specimens in the London Natural History Museum collected in 1920. in Molossidae
Distribution. Five disjunct regions: Guinean and Sahelian savannas in W Africa (Guinea and Liberia E to Niger and Nigeria); White Nile valley (Sudan, South Sudan, and NE DR Congo); around Lake Victoria (Uganda, Kenya, and Tanzania); a narrow strip along the E African coast between Mombasa and Dar es Salaam; and SW shore of Lake Tanganyika in NE Zambia, based on a reidentification in 2010 of two specimens in the London Natural History Museum collected in 1920.
Distribution. SE DR Congo, Angola, Zambia, Malawi, and Zimbabwe to N Namibia, N & E Botswana and W Mozambique, as far S as the Orange and Limpopo rivers in NE South Africa; it may occur in NW (Lake Victoria) & W Tanzania, Rwanda and Burundi. in Galagidae
Distribution. SE DR Congo, Angola, Zambia, Malawi, and Zimbabwe to N Namibia, N & E Botswana and W Mozambique, as far S as the Orange and Limpopo rivers in NE South Africa; it may occur in NW (Lake Victoria) & W Tanzania, Rwanda and Burundi.
Subspecies and Distribution. G.s.senegalensisE.GeoffroySaint-Hilaire,1796—limitsofitsdistributionarelittleknown,butitisfoundfromSenegaltoESudan(acrosstheWhiteNile),andStoEUganda(Karamojaregion),WKenya(MountElgon),andTanzania. G.s.braccatusElliot,1907—highlandregionsofKenyaandNTanzania. G.s.dunniDollman,1910—Eritrea,EEthiopia,andpossiblySomalia;theprecisedistributionisunknown. G. s. sotikae Hollister, 1920 — Kenya, S Uganda, and Tanzania, along the S shores of Lake Victoria from Mwanza to Ankole. in Galagidae
Subspecies and Distribution. G.s.senegalensisE.GeoffroySaint-Hilaire,1796—limitsofitsdistributionarelittleknown,butitisfoundfromSenegaltoESudan(acrosstheWhiteNile),andStoEUganda(Karamojaregion),WKenya(MountElgon),andTanzania. G.s.braccatusElliot,1907—highlandregionsofKenyaandNTanzania. G.s.dunniDollman,1910—Eritrea,EEthiopia,andpossiblySomalia;theprecisedistributionisunknown. G. s. sotikae Hollister, 1920 — Kenya, S Uganda, and Tanzania, along the S shores of Lake Victoria from Mwanza to Ankole.
Subspecies and Distribution. C.p.pygerythrusF.Cuvier,1821—Botswana,Zimbabwe,SMozambique,Namibia,SouthAfrica(Kwazulu-NatalandTransvaalprovinces),Swaziland,andLesotho,SoftheZambeziRiver. C.p.excubitorSchwarz,1926—NEKenya(PateandMandaIsintheLamuArhipelago). C.p.hilgertiNeumann,1902—SEthiopia(EthiopianRiftValleyandintopartsofthehighlandsEoftheRift),SWSomalia,EUganda,Kenya,andNTanzania. C.p.nesiotesSchwarz,1926—ETanzania(PembaandMafiaIs). C. p. rufoviridis 1. Geoffroy Saint-Hilaire, 1843 — SW Uganda (S of Lake Victoria), Rwanda, Burundi, W Tanzania, Malawi, N Mozambique, and E Zambia (E of the Luangwa Valley) to the Zambezi River. in Cercopithecidae
Subspecies and Distribution. C.p.pygerythrusF.Cuvier,1821—Botswana,Zimbabwe,SMozambique,Namibia,SouthAfrica(Kwazulu-NatalandTransvaalprovinces),Swaziland,andLesotho,SoftheZambeziRiver. C.p.excubitorSchwarz,1926—NEKenya(PateandMandaIsintheLamuArhipelago). C.p.hilgertiNeumann,1902—SEthiopia(EthiopianRiftValleyandintopartsofthehighlandsEoftheRift),SWSomalia,EUganda,Kenya,andNTanzania. C.p.nesiotesSchwarz,1926—ETanzania(PembaandMafiaIs). C. p. rufoviridis 1. Geoffroy Saint-Hilaire, 1843 — SW Uganda (S of Lake Victoria), Rwanda, Burundi, W Tanzania, Malawi, N Mozambique, and E Zambia (E of the Luangwa Valley) to the Zambezi River.
Distribution. Uganda, along the N & NW shores of Lake Victoria, including Mabira Forest (most likely the type locality), Bujuko and Bukasa Forests, and along the E side of the Albertine Rift, especially in Kibale Forest National Park and the Bukoma area; it is also found in Sango Bay Forest and in Minziro Forest, NW Tanzania, both parts of the Minziro-Sango Bay Transboundary Site. in Cercopithecidae
Distribution. Uganda, along the N & NW shores of Lake Victoria, including Mabira Forest (most likely the type locality), Bujuko and Bukasa Forests, and along the E side of the Albertine Rift, especially in Kibale Forest National Park and the Bukoma area; it is also found in Sango Bay Forest and in Minziro Forest, NW Tanzania, both parts of the Minziro-Sango Bay Transboundary Site.
On following pages: 473. Senegal Striped Grass Mouse (Lemniscomys linulus); 474. Mittendorf's Striped Grass Mouse (Lemniscomys mittendorfi); 475. Hoogstraal's Striped Grass Mouse (Lemniscomys hoogstraali), 476. Buffoon Striped Grass Mouse (Lemniscomys macculus); 477. Griselda Striped Grass Mouse (Lemniscomys griselda); 478. Single-striped Grass Mouse (Lemniscomys rosalia); 479. Rosevear's Striped Grass Mouse (Lemniscomys roseveari); 480. West African Rufous-nosed Rat (Oenomys ornatus); 481. Common Rufous-nosed Rat (Oenomys hypoxanthus); 482. East African Groove-toothed Swamp Rat (Pelomys fallax); 483. Hopkins's Groove-toothed Swamp Rat (Pelomys hopkinsi); 484. Lake Victoria Groove-toothed Swamp Rat (Pelomys isseli); 485. Angolan Groove-toothed Swamp Rat (Pelomys campanae); 486. Least Groove-toothed Swamp Rat (Pelomys minor); 487. Target Rat (Stochomys longicaudatus); 488. Kemp's Thicket Rat (Thamnomys kempi); 489. Hatt's Thicket Rat (Thamnomys majon; 490. Schouteden's Thicket Rat (Thamnomys schoutedeni); 491. Thomas's Thicket Rat (Thamnomys venustus); 492. Namaqua Rock Rat (Micaelamys namaquensis); 493. Grant's Rock Rat (Micaelamys granti); 494. Mesic Four-striped Grass Rat (Rhabdomys dilectus); 495. West-Central South African Fourstriped Grass Rat (Rhabdomys bechuanae); 496. KwaZulu Natal Four-striped Grass Rat (Rhabdomys chakae); 497. Karoo Four-striped Grass Rat (Rhabdomys intermedius); 498. Xeric Four-striped Grass Rat (Rhabdomys pumilio), 499. Loring's Thallomys (Thallomys loringi); 500. Black-tailed Thallomys (Thallomys nigricauda); 501. Sundevall's Thallomys (Thallomys paedulcus); 502. Shortridge's Thallomys (Thallomys shortridgei). in Muridae
On following pages: 473. Senegal Striped Grass Mouse (Lemniscomys linulus); 474. Mittendorf's Striped Grass Mouse (Lemniscomys mittendorfi); 475. Hoogstraal's Striped Grass Mouse (Lemniscomys hoogstraali), 476. Buffoon Striped Grass Mouse (Lemniscomys macculus); 477. Griselda Striped Grass Mouse (Lemniscomys griselda); 478. Single-striped Grass Mouse (Lemniscomys rosalia); 479. Rosevear's Striped Grass Mouse (Lemniscomys roseveari); 480. West African Rufous-nosed Rat (Oenomys ornatus); 481. Common Rufous-nosed Rat (Oenomys hypoxanthus); 482. East African Groove-toothed Swamp Rat (Pelomys fallax); 483. Hopkins's Groove-toothed Swamp Rat (Pelomys hopkinsi); 484. Lake Victoria Groove-toothed Swamp Rat (Pelomys isseli); 485. Angolan Groove-toothed Swamp Rat (Pelomys campanae); 486. Least Groove-toothed Swamp Rat (Pelomys minor); 487. Target Rat (Stochomys longicaudatus); 488. Kemp's Thicket Rat (Thamnomys kempi); 489. Hatt's Thicket Rat (Thamnomys majon; 490. Schouteden's Thicket Rat (Thamnomys schoutedeni); 491. Thomas's Thicket Rat (Thamnomys venustus); 492. Namaqua Rock Rat (Micaelamys namaquensis); 493. Grant's Rock Rat (Micaelamys granti); 494. Mesic Four-striped Grass Rat (Rhabdomys dilectus); 495. West-Central South African Fourstriped Grass Rat (Rhabdomys bechuanae); 496. KwaZulu Natal Four-striped Grass Rat (Rhabdomys chakae); 497. Karoo Four-striped Grass Rat (Rhabdomys intermedius); 498. Xeric Four-striped Grass Rat (Rhabdomys pumilio), 499. Loring's Thallomys (Thallomys loringi); 500. Black-tailed Thallomys (Thallomys nigricauda); 501. Sundevall's Thallomys (Thallomys paedulcus); 502. Shortridge's Thallomys (Thallomys shortridgei).
Distribution. From extreme SE Nigeria E to the shores of Lake Victoria (including Bioko I) and S to extreme NE Angola and NW Zambia. in Muridae
Distribution. From extreme SE Nigeria E to the shores of Lake Victoria (including Bioko I) and S to extreme NE Angola and NW Zambia.
Distribution. Known only from three of the Ssese Is (Bugala, Bunyama, Kome) in NW part of Lake Victoria, Uganda, and extreme mainland SW Kenya (Nyabera Marsh). in Muridae
Distribution. Known only from three of the Ssese Is (Bugala, Bunyama, Kome) in NW part of Lake Victoria, Uganda, and extreme mainland SW Kenya (Nyabera Marsh).
Distribution. Widely distributed in Congo Basin and Albertine Rift from the Niger River in W to shores of Lake Victoria in E; an isolated population occurs in NW Zambia and neighboring DR Congo. in Muridae
Distribution. Widely distributed in Congo Basin and Albertine Rift from the Niger River in W to shores of Lake Victoria in E; an isolated population occurs in NW Zambia and neighboring DR Congo.
Distribution. SW & SE Australia. Wheatbelt region and S parts of Western Australia, including N of Burngup, near Lake Biddy, Dragon Rocks Nature Reserve, Lake Magenta Nature Reserve, Fitzgerald River National Park, and the Ravensthorpe Range area; also in SW Victoria, including the Grampians and extending S to Lower Glenelg National Park and into the SE tip of South Australia. in Muridae
Distribution. SW & SE Australia. Wheatbelt region and S parts of Western Australia, including N of Burngup, near Lake Biddy, Dragon Rocks Nature Reserve, Lake Magenta Nature Reserve, Fitzgerald River National Park, and the Ravensthorpe Range area; also in SW Victoria, including the Grampians and extending S to Lower Glenelg National Park and into the SE tip of South Australia.
Distribution. Known only from Tanzania, recorded from Lake Victoria S to hills close to Lake Rukwa and W Eastern Arc Mts. in Muridae
Distribution. Known only from Tanzania, recorded from Lake Victoria S to hills close to Lake Rukwa and W Eastern Arc Mts.
A multi-model ensemble for the Lake Victoria Basin (East-Africa)
<p>Data produced by all CORDEX FPS - <strong>ELVIC</strong> models (COSMO-CLM, HCLIM38, WRF, RegCM, UKMO), covering the larger region surrounding Lake Victoria - East-Africa. This data accompanies ELVIC's evaluation paper (van Lipzig et al., 2022, submitted). More information about ELVIC ("climate Extremes in the Lake Victoria basin") is available via <a href="https://ees.kuleuven.be/en/elvic/">https://ees.kuleuven.be/en/elvic/</a>.</p> <p>In this dataset, zipped files are available per variable (precipitation, top-of-atmosphere short- and longwave radiation and lake surface temperature) for both convection-parametrized (10 km-scale resolution, "PAR") and convection-permitting (km-scale resolution, "CP") simulations. Simulation 10y-period covers the years 2006-2015. Each netcdf file contains 120 monthly diurnal cycle data at 1h or 3h temporal resolution. The full dataset is available by contacting the first author.</p>
Model Data and Diagnostics used for the Lake Victoria Process Analysis
<p>Model data and derived diagnostics used in the Lake Victoria analysis, from Unified Model output. © Crown Copyright, Met Office</p>
Data from: Population genomic tests of models of adaptive radiation in Lake Victoria region cichlid fish.
Adaptive radiation is usually thought to be associated with speciation, but the evolution of intraspecific polymorphisms without speciation is also possible. The radiation of cichlid fish in Lake Victoria is perhaps the most impressive example of a recent rapid adaptive radiation, with 600+ very young species. Key questions about its origin remain poorly characterized, such as the importance of speciation versus polymorphism, whether species persist on evolutionary time scales, and if speciation happens more commonly in small isolated or in large connected populations. We used 320 individuals from 105 putative species from Lakes Victoria, Edward, Kivu, Albert, Nabugabo and Saka, in a radiation-wide AFLP genome scan to address some of these questions. We demonstrate pervasive signatures of speciation supporting the classical model of adaptive radiation associated with speciation. A positive relationship between the age of lakes and the average genomic differentiation of their species, and a significant fraction of molecular variance explained by above-species level taxonomy suggest the persistence of species on evolutionary time scales, with radiation through sequential speciation rather than a single starburst. Finally the large gene diversity retained from colonization to individual species in every radiation suggests large effective population sizes and makes speciation in small geographical isolates unlikely.
Data from: Genome-wide RAD sequence data provide unprecedented resolution of species boundaries and relationships in the Lake Victoria cichlid adaptive radiation
Although population genomic studies using next generation sequencing (NGS) data are becoming increasingly common, studies focusing on phylogenetic inference using these data are in their infancy. Here, we use NGS data generated from reduced representation genomic libraries of restriction-site-associated DNA (RAD) markers to infer phylogenetic relationships among 16 species of cichlid fishes from a single rocky island community within Lake Victoria's cichlid adaptive radiation. Previous attempts at sequence-based phylogenetic analyses in Victoria cichlids have shown extensive sharing of genetic variation among species and no resolution of species or higher-level relationships. These patterns have generally been attributed to the very recent origin (<15 000 years) of the radiation, and ongoing hybridization between species. We show that as we increase the amount of sequence data used in phylogenetic analyses, we produce phylogenetic trees with unprecedented resolution for this group. In trees derived from our largest data supermatrices (3 to >5.8 million base pairs in width), species are reciprocally monophyletic with high bootstrap support, and the majority of internal branches on the tree have high support. Given the difficulty of the phylogenetic problem that the Lake Victoria cichlid adaptive radiation represents, these results are striking. The strict interpretation of the topologies we present here warrants caution because many questions remain about phylogenetic inference with very large genomic data set and because we can with the current analysis not distinguish between effects of shared ancestry and post-speciation gene flow. However, these results provide the first conclusive evidence for the monophyly of species in the Lake Victoria cichlid radiation and demonstrate the power that NGS data sets hold to resolve even the most difficult of phylogenetic challenges.
FIGS 46 in Ciliated protozoa from a volcanic crater-lake in Victoria, Australia
FIGS 46±48. Silver-carbonate impregnation. (46±47) Uronema nigricans; (48) Pseudocohnilembus pusillus. The structure of the oral infraciliature of P. pusillus is like that described by Niessen (1984, in Foissner et al., 1994). Cc, caudal cilium complex; Ma, macronucleus; OD, oral dikinetid; PK1, PK2, PK3, oral polykinetid 1, 2, and 3, respectively. Scale bars: 10 mm.
FIGS 49 in Ciliated protozoa from a volcanic crater-lake in Victoria, Australia
FIGS 49±54. Nomarski interference contrast; (49±50) Cristigera setosa. Cc, caudal cilia; Um, undulating membrane; Sc, somatic cilia. Arrowhead in (50) to the groove along the ventral surface, typical of the genus Cristigera; (51) Aspidisca marsupialis. Arrowhead to the characteristic ventral`thorn' of this species, a feature also observed by Penard (1922); (52±53) Mylestoma pusillum. Cc, caudal cilia; arrowhead to the longitudinal groove characteristic of this species; (54) Epalxella striata, a common ciliate in anaerobic environments, found in the brackish water of the crater-lake. Scale bars: 20 mm.
FIGS 39 in Ciliated protozoa from a volcanic crater-lake in Victoria, Australia
FIGS 39±44. Pleuroplites australis; (39) cultured organisms in an oxygen gradient (the air bubble is at the top margin of the photograph). The organisms accumulate at some distance from oxygen-saturated water, i.e. at the oxic-anoxic boundary. Arrows to some conjugating individuals; (40, 44) two di€erent cell shapes, each with two macronuclei. Arrows in (44) to the clavate cilia; (41±43) silver-impregnated specimens: (41, 43) silver-carbonate impregnation; (42) protargol. CV, contractile vacuole; E, extrusomes; FV, food vacuole; K, circumoral kinety; Ma, macronucleus; arrowheads in (43) at the somatic kineties that bear clavate cilia.
FIG. 38 in Ciliated protozoa from a volcanic crater-lake in Victoria, Australia
FIG. 38. Pleuroplites australis. Morphological variants, and arrangement of the infraciliature. Note the disposition of the mitochondria (Mt) in longitudinal rows, and the variation in the number of macronuclei. C, clavate cilia; CV, contractile vacuole; E, extrusomes; K, circumoral kinety; Ma, macronucleus; mi, micronucleus; Mt, mitochondria.
FIGS 31 in Ciliated protozoa from a volcanic crater-lake in Victoria, Australia
FIGS 31±33. Protargol silver impregnation; (31) Oxytricha multigranulosa. AZM, adoral zone of membranelles in the oral region; (32, 33) Oxytricha salmastra; (32) ventral surface. Arrowheads to the cirri, and to the right and the left marginal row of cirri. Ma, macronucleus; (33) dorsal surface of the same specimen. Arrowheads to the dorsal kineties, of which the one at the far right of the photograph is shorter. Cc, caudal cilia. Scale bar: 20 mm.
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