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202 results for “Lake Tanganyika”
Century-Long Temperature Record from Lake Tanganyika
Lake Tanganyika has one of the longest temperature records of any lake on Earth. Temperature data are spatially and temporally discontinuous but offer an incredible resource for understanding climate impacts on this great tropical lake.
The genetic population structure of Lake Tanganyika's Lates species flock, an endemic radiation of pelagic top predators
<p>Data associated with the manuscript "The genetic population structure of Lake Tanganyika’s Lates species flock, an endemic radiation of pelagic top predators," where we investigate the genetic population structure of the four endemic <em>Lates </em>species in Lake Tanganyika.</p> <p><strong>Abstract</strong>: Life history traits are important in shaping gene flow within species and can thus determine whether a species exhibits genetic homogeneity or population structure across its range. Understanding genetic connectivity plays a crucial role in species conservation decisions, and genetic connectivity is an important component of modern fisheries management in fishes exploited for human consumption. In this study, we investigated the population genetics of four endemic <em>Lates</em> species of Lake Tanganyika (<em>Lates stappersii</em>, <em>L. microlepis</em>, <em>L. mariae</em> and <em>L. angustifrons</em>), using reduced-representation genomic sequencing methods. We find the four species to be strongly differentiated from one another, with no evidence for contemporary admixture. We also find evidence for high levels of genetic structure within <em>L. mariae</em>, with the majority of individuals from the most southern sampling site forming a genetic group distinct from the individuals at other sampling sites<em>.</em> We find evidence for much weaker structure within the other three species, <em>L. stappersii,</em> <em>L. microlepis</em>, and <em>L. angustifrons</em>, although small and unbalanced sample sizes and imprecise geographic sampling locations may hinder our ability to detect weak population structure. We call for further research into the origins of the genetic differentiation that we observe in these four species, particularly that of <em>L. mariae</em>, which may be important for the conservation and management of this species.</p> <p>Code associated with the analysis of these data can be found on GitHub at <a href="https://github.com/jessicarick/lates-popgen">https://github.com/jessicarick/lates-popgen</a>.</p>
Fig. 8 in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 8. Morphology of Ctenochromis Pfeffer, 1893, imaged using x-ray tomography micro CT. a. Ctenochomis pectoralis Pfeffer, 1893, paralectotype BMNH 1899.2.27.1 from Korogwe. b. C. pectoralis from the Ruvu River (part of BMNH 2021.7.15.1-3). c. C. scatebra Genner, Ngatunga &
Fig. 7 in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 7. Morphology of Ctenochromis Pfeffer, 1893.a, d, g. Oral teeth.b, e, h. Chest squamation illustrating scale-free patches. c, f, i. Cheek squamation illustrating the reduction in scale number towards the ventral section of the cheek. a–c. Ctenochomis pectoralis Pfeffer, 1893 from Korogwe (paralectotype BMNH 1899.2.27.1); d–f. C. pectoralis from the Ruvu River (part of BMNH 2021.7.15.1-3); g–i. C. scatebra Genner, Ngatunga & Turner sp. nov. from Chemka Springs (holotype BMNH 2021.7.15.4). Scale bars:
Fig. 6. a. Ctenochomis pectoralis Pfeffer, 1893, lectotype ZMH402 in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 6. a. Ctenochomis pectoralis Pfeffer, 1893, lectotype ZMH402 from Korogwe (imaged by Thilo Weddehage). b. C. pectoralis, paralectotype BMNH 1899.2.27.1 from Korogwe. c. C. pectoralis, ♂ from Ruvu River shortly after capture (part of BMNH 2021.7.15.1-3). d. C. pectoralis, ♂ from Ruvu River preserved state (part of BMNH 2021.7.15.1-3). e. C. scatebra Genner, Ngatunga & Turner sp. nov., ♂ from Chemka Springs shortly after capture (part of BMNH 2021.7.15.1-3). f. C. scatebra
Fig. 4 in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 4. Phylogenetic reconstructions of representatives of populations of Ctenochromis Pfeffer, 1893, as well as representatives of the Lake Malawi haplochromine radiation, and the Lake Tanganyika Tropheini Poll, 1986. a. Maximum Likelihood phylogenetic reconstruction based on 11 288 SNPs. b. Maximum Likelihood phylogenetic reconstruction based on 1047 basepairs of the entired NADH2 mtDNA gene. In both trees, numbers on branches indicate percentage bootstrap support, and branches with> 70% support are shown. The scale bars represent a measure of genetic distance. See Table 1 for sampling details. Collection localities are in parentheses. Samples from Nyumba ya Mungu have accessions
Fig. 5. Shuja horei gen. et comb. nov. a in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 5. Shuja horei gen. et comb. nov. a. Illustration from the original type specimen (Günther 1894). b. A freshly caught specimen collected in 2016 from the Malagarasi River, Ilagala (BMNH 2021.7.15.14). c. Radiographs of the type series (syntypes) from the Natural History Museum (BMNH 1889.1.30.13– 15). Note the prognathous jaw that distinguishes Shuja Genner, Ngatunga & Turner gen. nov. from other genera within the Tropheini Poll, 1986. Radiographs from the Natural History Museum, London
Fig. 3. Principal Component Axes 1 and 2 in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 3. Principal Component Axes 1 and 2 of morphological measurements of specimens of Ctenochromis pectoralis Pfeffer, 1893 of the type series from Korogwe, compared with specimens of C. pectoralis from the Ruvu River, and C. scatebra Genner, Ngatunga & Turner sp. nov. from Chemka Springs. The image of C. pectoralis from Korogwe is from the original description (Pfeffer 1893). Collection localities are in parentheses following the species names. In total, Principal Component Axes 1 and 2
Fig. 1 in Revision of the African cichlid fish genus <em><em>Ctenochromis</em></em> (Teleostei, Cichliformes), including a description of the new genus <em>Shuja</em> from Lake Tanganyika and the new species <em><em>Ctenochromis</em></em> <em>scatebra</em> from northern Tanzania
Fig. 1. The type locality of Ctenochromis pectoralis Pfeffer, 1893 is Korogwe, in the lower section of the Pangani River system. Collection sites of specimens of Ctenochromis for this study were Chemka Springs and the Ruvu River (which flows between Lake Jipe to the east, and Nyumba ya Mungu Reservoir to the west). A further population of Ctenochromis has been reported from Mzima Springs, in
Fig. 6. a. Ctenochomis pectoralis Pfeffer, 1893, lectotype ZMH402 in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 6. a. Ctenochomis pectoralis Pfeffer, 1893, lectotype ZMH402 from Korogwe (imaged by Thilo Weddehage). b. C. pectoralis, paralectotype BMNH 1899.2.27.1 from Korogwe. c. C. pectoralis, ♂ from Ruvu River shortly after capture (part of BMNH 2021.7.15.1-3). d. C. pectoralis, ♂ from Ruvu River preserved state (part of BMNH 2021.7.15.1-3). e. C. scatebra Genner, Ngatunga & Turner sp. nov., ♂ from Chemka Springs shortly after capture (part of BMNH 2021.7.15.1-3). f. C. scatebra sp. nov. holotype BMNH 2021.7.15.4. Scale bars: 10 mm.
Fig. 4 in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 4. Phylogenetic reconstructions of representatives of populations of Ctenochromis Pfeffer, 1893, as well as representatives of the Lake Malawi haplochromine radiation, and the Lake Tanganyika Tropheini Poll, 1986. a. Maximum Likelihood phylogenetic reconstruction based on 11 288 SNPs. b. Maximum Likelihood phylogenetic reconstruction based on 1047 basepairs of the entired NADH2 mtDNA gene. In both trees, numbers on branches indicate percentage bootstrap support, and branches with> 70% support are shown. The scale bars represent a measure of genetic distance. See Table 1 for sampling details. Collection localities are in parentheses. Samples from Nyumba ya Mungu have accessions EU753938 and EU753939 and are from Koblmüller et al. (2008).
Fig. 1 in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 1. The type locality of Ctenochromis pectoralis Pfeffer, 1893 is Korogwe, in the lower section of the Pangani River system. Collection sites of specimens of Ctenochromis for this study were Chemka Springs and the Ruvu River (which flows between Lake Jipe to the east, and Nyumba ya Mungu Reservoir to the west). A further population of Ctenochromis has been reported from Mzima Springs, in the Tsavo River system of Kenya.
Fig. 5. Shuja horei gen. et comb. nov. a in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 5. Shuja horei gen. et comb. nov. a. Illustration from the original type specimen (Günther 1894). b. A freshly caught specimen collected in 2016 from the Malagarasi River, Ilagala (BMNH 2021.7.15.14). c. Radiographs of the type series (syntypes) from the Natural History Museum (BMNH 1889.1.30.13– 15). Note the prognathous jaw that distinguishes Shuja Genner, Ngatunga & Turner gen. nov. from other genera within the Tropheini Poll, 1986. Radiographs from the Natural History Museum, London (Creative Commons Attribution License (CC BY 4.0)). Scale bars: 10 mm.
Fig. 7 in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 7. Morphology of Ctenochromis Pfeffer, 1893.a, d, g. Oral teeth.b, e, h. Chest squamation illustrating scale-free patches. c, f, i. Cheek squamation illustrating the reduction in scale number towards the ventral section of the cheek. a–c. Ctenochomis pectoralis Pfeffer, 1893 from Korogwe (paralectotype BMNH 1899.2.27.1); d–f. C. pectoralis from the Ruvu River (part of BMNH 2021.7.15.1-3); g–i. C. scatebra Genner, Ngatunga & Turner sp. nov. from Chemka Springs (holotype BMNH 2021.7.15.4). Scale bars: 1 mm.
Fig. 2. a in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 2. a. Ruvu River where specimens of Ctenochromis pectoralis Pfeffer, 1893 were collected. b. Chemka Springs where specimens of C. scatebra Genner, Ngatunga & Turner sp. nov. were collected. See Table 1 for collection details.
Fig. 8 in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 8. Morphology of Ctenochromis Pfeffer, 1893, imaged using x-ray tomography micro CT. a. Ctenochomis pectoralis Pfeffer, 1893, paralectotype BMNH 1899.2.27.1 from Korogwe. b. C. pectoralis from the Ruvu River (part of BMNH 2021.7.15.1-3). c. C. scatebra Genner, Ngatunga & Turner sp. nov., holotype BMNH 2021.7.15.4. Scale bars: 10 mm.
Fig. 3. Principal Component Axes 1 and 2 in Revision of the African cichlid fish genus Ctenochromis (Teleostei, Cichliformes), including a description of the new genus Shuja from Lake Tanganyika and the new species Ctenochromis scatebra from northern Tanzania
Fig. 3. Principal Component Axes 1 and 2 of morphological measurements of specimens of Ctenochromis pectoralis Pfeffer, 1893 of the type series from Korogwe, compared with specimens of C. pectoralis from the Ruvu River, and C. scatebra Genner, Ngatunga & Turner sp. nov. from Chemka Springs. The image of C. pectoralis from Korogwe is from the original description (Pfeffer 1893). Collection localities are in parentheses following the species names. In total, Principal Component Axes 1 and 2 captured 74.5% of the observed morphological variation.
Figures 15–20 in Monogeneans from Catfishes in Lake Tanganyika. I: Two new species of Bagrobdella (Dactylogyridae) from Auchenoglanis occidentalis (Siluriformes: Claroteidae)
Figures 15–20. MCO of the six species belonging to Bagrobdella: (15) Bagrobdella vanhovei sp. nov.; (16) Bagrobdella vansteenbergei sp. nov.; (17) Bagrobdella auchenoglanii; (18) Bagrobdella fraudulenta; (19) Bagrobdella anthopenis; (20) Bagrobdella parauchenoglanii (Akoumba et al. 2017, Euzet and Le Brun 1990). Scale bar: 20 µm.
Figures 21–26 in Monogeneans from Catfishes in Lake Tanganyika. I: Two new species of Bagrobdella (Dactylogyridae) from Auchenoglanis occidentalis (Siluriformes: Claroteidae)
Figures 21–26. (21) Bagrobdella vanhovei sp. nov. microphotograph in toto; (22) Bagrobdella vansteenbergei sp. nov. microphotograph in toto; (23) Microphotograph of the trapezoidal plate in the haptor of Bagrobdella vanhovei; (24) Button like structure; (25) Semi-circular structure; (26) Egg (B. vanhovei sp. nov). Scale bars: 21 = 100 µm, 22 = 200 µm, 23, 24, 26 = 20 µm, 25 = 50 µm.
Figure 6 in Redescription of Mastacembelus ophidium Günther, 1893 (Synbranchiformes: Mastacembelidae) and description of a new spiny eel from Lake Tanganyika
Figure 6. Mastacembelus ophidium Günther, 1893, 326 mm TL, ''8 km. au Sud de Bujumbura, Lac Tanganyika'' (Burundi) (MRAC 75-01-P-199–123). (A) Lateral view. (B) Position of posterior angle of lips to posterior nare and eye. Vertical line is perpendicular to a horizontal line parallel with upper surface of head. (C) Detail of pectoral fin region. Upper tip of gill slit, dorsal edge of pectoral-fin base and ventral edge of pectoral-fin base connected by dashed lines.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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