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737 results for “Central Africa”
Data from: Phenotypic and genotypic variation across a stable white-eye (Zosterops sp.) hybrid zone in central South Africa
The interbreeding of two species after a period of separation (secondary contact) most often results in stable areas of hybridization or tension zones characterized by selection against hybrid individuals. Three plumage forms of Zosterops meet and interbreed in central South Africa. Here we examine how phenotypic measures (biometric and plumage) and genotypic markers (mitochondrial and nuclear DNA) change through a putative hybrid zone located in the area where the ranges of the Orange River white-eye Zosterops pallidus and a subspecies of the Cape white-eye Zosterops virens capensis meet. Four of the five sequenced loci (i.e. ATP6, MUSK, GADPH and TGF-β2) showed strong divergence and differentiation between allopatric parental populations, whereas the sex-linked CHD1Z locus exhibited high homogeneity. Microsatellite data also distinguished between pure Z. pallidus and Z. v. capensis populations. Together, the nuclear data (introns and microsatellites) identified at least 12 hybrid individuals as later generation hybrids (i.e. F2 or backcrosses), and no F1 hybrids were detected. As genetic incompatibility does not appear to play a role in restricting this stable hybrid zone, it is likely that environmental conditions including biome type and edge effect are constraining hybrid zone movement.
Data from: Architectural differences associated to functional traits among 45 coexisting tree species in central Africa
1. Architectural traits that determine the light captured in a given environment are an important aspect of the life-history strategies of tropical tree species. In this study, we examined how interspecific variation in architectural traits is related to the functional traits of 45 coexisting tree species in central Africa. 2. At the tree level, we measured tree diameter, total height and crown dimensions for an average of 30 trees per species (range 14–72, total 968 trees) distributed over a large range of diameters (up to 162 cm). Using log-log models, we fitted species-specific allometric relationships between tree diameter, height and crown dimensions. At the species level, we derived architectural traits (height and crown dimensions) at 15 cm and maximum diameters from species-specific allometries. The architectural traits were then related to functional traits, including light requirements, wood density, leaf habit, and dispersal mode. 3. Among the 45 coexisting tree species, we identified strong variations in height and crown allometries, along with architectural traits derived from these species-specific allometries. There was a positive correlation among architectural traits, suggesting that large-statured canopy species were taller and had larger and deeper crowns than small-statured understory species at all ontogenic stages. The relationships between architectural and functional traits highlighted a continuum of species between the large-statured canopy species and the small-statured understory species. In this moist and seasonal forest, large-statured canopy species tended to be light-demanding, wind-dispersed, deciduous and large contributors to forest biomass (high basal area), while small-statured understory species tended to be shade-tolerant, animal-dispersed, evergreen and most abundant in terms of stem density. 4. Our results highlighted strong architectural differences among coexisting tropical tree species in central Africa. The relationships between architectural and functional traits provided insights into the life-history strategy of tropical tree species.
Fig. 5 in Two new species of Oxyanthus DC. (Rubiaceae) from Central Africa
Fig. 5. – Fruiting stem of Oxyanthus lewisii Sonké & O. Lachenaud.
Fig. 14 in A synopsis of the Sabicea floribunda group (Rubiaceae) from Central Africa, including three new species
Fig. 14. – Distribution map of Sabicea segregata R.D. Good.
Fig. 10 in A synopsis of the Sabicea floribunda group (Rubiaceae) from Central Africa, including three new species
Fig. 10. – Distribution map of Sabicea proselyta (N. Hallé) Razafim.
Fig. 8 in A synopsis of the Sabicea floribunda group (Rubiaceae) from Central Africa, including three new species
Fig. 8. – Distribution map of Sabicea floribunda K. Schum.
Figs 222, 223 in New species and new records of jumping spiders (Araneae: Salticidae) from central South Africa
Figs 222, 223. Thyene thyenoides: (ƻƻƻ) HSLJ\QH; (ƻƻ) LQWHUQDO VWUXFWXUH RI HSLJ\QH, GRUVDO YLHZ.
Fig. 93 in New species and new records of jumping spiders (Araneae: Salticidae) from central South Africa
Fig. 93. Distribution of /DQJRQD KLUVXWD sp. n. (circles) and L. lotzi sp. n. (square).
Figure 8 in Three new Dactylogyrus species (Monogenea: Dactylogyridae) and redescription of one other, gill parasites of five Labeo spp. (Cypriniformes: Cyprinidae) from the Sanaga basin (Cameroon, Central Africa)
Figure 8. Dactylogyrus-groups based on the morphology of dorsal anchors and male copulatory organ.
Figure 1 in Three new Dactylogyrus species (Monogenea: Dactylogyridae) and redescription of one other, gill parasites of five Labeo spp. (Cypriniformes: Cyprinidae) from the Sanaga basin (Cameroon, Central Africa)
Figure 1. Map of the middle section of the Sanaga hydrosystem indicating sampling localities.
Data from: Phenotypic and genotypic variation across a stable white-eye (Zosterops sp.) hybrid zone in central South Africa
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Data from: Architectural differences associated to functional traits among 45 coexisting tree species in central Africa
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Optimizing maize yield in West and Central Africa
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Data from: Idiosyncratic responses to climate-driven forest fragmentation and marine incursions in reed frogs from Central Africa and the Gulf of Guinea Islands
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FIGURES 31–35 in On the taxonomy of Afrotropical Coleophoridae (III). New or little known species from Central and Oriental Africa (Lepidoptera, Coleophoridae)
FIGURES 31–35. Male genitalia of C. riftella Baldizzone & van der Wolf, sp. nov. 31, GP Bldz 16645. 32, idem, abdominal segments 1–4. 33, close-up of cornuti, GP Wf 9032, holotype. 34, detail of valva, sacculus and phallotheca, GP Bldz 16645. 35, same detail, GP Wf 10331.
FIGURES 53–55 in On the taxonomy of Afrotropical Coleophoridae (III). New or little known species from Central and Oriental Africa (Lepidoptera, Coleophoridae)
FIGURES 53–55. Female genitalia of C. gilgilensis Baldizzone & van der Wolf, sp. nov. 53, GP Wf 10345. 54, idem, detail of sterigma. 55, abdominal segments 1-4.
FIGURES 9–14 in On the taxonomy of Afrotropical Coleophoridae (III). New or little known species from Central and Oriental Africa (Lepidoptera, Coleophoridae)
FIGURES 9–14. Adults of Coleophora spp. 9, C. presbytica Meyrik, ♀ "Congo Dem. Rep. | Bas-Congo, 320 m | Nat. Res. Luki-Mayumbe | 05°27'S 13°05'E | 29.III.2006 | leg. J. De Prins", coll. RMCA. 10, C. camerunensis Baldizzone & van der Wolf, sp. nov.—Holotype ♂. 11, C. ensifera Baldizzone & van der Wolf, sp. nov.—Holotype ♂. 12, C. gilgilensis Baldizzone & van der Wolf, sp. nov.—Holotype ♂. 13, C. nyanzaensis Baldizzone & van der Wolf, sp. nov.—Holotype ♂. 14, C. silvestris Baldizzone & van der Wolf, sp. nov.—Holotype ♂.
FIGURE 10 in Review of freshwater Bryozoa (Phylactolaemata) of Central Africa with descriptions of two new species
FIGURE 10. Plumatella tanganyikae, Specimen No. 443. (a) Colony shown with a single sessoblast, scale bar = 2 mm; (b) sessoblast valves with frontal valve on the left, scale bar = 100 μm; (c) sessoblast, SEM image, scale bar = 100 μm.
FIGURE 9 in Review of freshwater Bryozoa (Phylactolaemata) of Central Africa with descriptions of two new species
FIGURE 9. Plumatella ruandensis, Specimen No. 206 (a) Colony on semi-transparent substratum, scale bar = 5 mm; (b) floatoblast valves with dorsal valve on the left, scale bar = 100 μm; (c) floatoblasts, SEM image showing highly convex annular cells, dorsal side on the left, scale bar = 100 μm.
FIGURE 11. Plumatella wiebachi n in Review of freshwater Bryozoa (Phylactolaemata) of Central Africa with descriptions of two new species
FIGURE 11. Plumatella wiebachi n. sp., Specimen No. 56. (a) Colony surrounded by sessoblasts, scale bar = 3 mm; (b) colony showing greater detail, scale bar = 1 mm; (c) floatoblast valves with dorsal valve on the left, scale bar = 100 μm; (d–g) com-parison of statoblasts in Plumatella javanica and Plumatella wiebachi n. sp. (d) P. javanica floatoblast fenestra showing optical points of light around each tubercle; (e) P. javanica sessoblast from the author's personal collection from Thailand showing relatively large tubercles; (f) P. wiebachi n. sp. floatoblast fenestra showing the absence of such points of light; (g) P. wiebachi n. sp. sessoblast showing relatively small tubercles. Scale bars for figs. 11d–g = 100 μm.
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.