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118 results for “West Central Africa”
FIGURE 9 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 9. Waveforms and power spectra of EODs from Stomatorhinus walkeri (A – D), S. ater (E, F) and S. patrizii (G, H) on the same time scale as those shown in Fig. 5. EOD waveforms are centered about the largest headnegative peak, normalized to the same peaktopeak height and plotted with head positivity upward for each trace. Power spectra are normalized so that the peak energy is adjusted to 0 dB. Individual specimen numbers are indicated beneath waveforms; F = female, M = male.
FIGURE 8 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 8. Scores from types of S. ivindoensis n. sp. and five other Stomatorhinus species on the second and third factors of a principal components analysis of the covariance matrix calculated from 24 logtransformed morphometric measures. Twelve nontype specimens of S. walkeri and one nontype of S. polli included. Variables loading most heavily on the second principal component are caudal peduncle depth, interorbital distance and internostril distance. Variables loading most heavily on the third principal component are eye diameter, postorbital head length and caudal
FIGURE 5 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 5. EOD waveforms (left) and power spectra (right) for Stomatorhinus ivindoensis n. sp. The holotype of S. ivindoensis, a male, is shown in A and B. Peaks are numbered in order from P 0 to P 3. EOD waveforms are centered about the largest headnegative peak and plotted with head positivity upward. Power spectra are normalized so that the peak energy is adjusted to 0 dB. EODs of reproductive males (E, F) are longer in duration and have a lower peak power frequency than those of females (C, D). Individual specimen numbers are indicated beneath waveforms; F = female, M = male, H = holotype. Time base = 0.1 millisecond.
FIGURE 7 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 7. Selected morphometric ratios of S. ivindoensis n. sp. compared to those in S. fuliginosus (A) and S. polli (B). IO = interorbital distance, HW = head width, CPD = caudal peduncle depth measured at terminus of anal fin, CPL = caudal peduncle length, E = eye diameter, HL = head length.
FIGURE 4 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 4. Typical forest creek habitat of Stomatorhinus ivindoensis n. sp.: upper “ Balé Creek ” within the Ipassa Plateau Reserve near Makokou, Gabon.
FIGURE 3 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 3. Collection sites of Stomatorhinus ivindoensis n. sp. (circles) and S. walkeri (triangles) in the Ivindo and Ogooué River basins of Gabon and the KouilouNiari basin of the Republic of Congo. Shaded areas delimit the boundary of the Lower Guinea ichthyofaunal province of West Central Africa.
FIGURE 2 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 2. Photograph (A) and radiograph (B) of preserved holotype of Stomatorhinus ivindoensis n. sp., CU 85157, 43.8 mm SL, male; (C) live paratype specimen no. 1004, CU 75437, 40.8 mm SL, male; (D) preserved paratype, CU 85465, 52.2 mm SL, female.
FIGURE 1 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 1. Drawing of Stomatorhinus ivindoensis n. sp. holotype, 43.8 mm SL. Drawn by Vera Ming Wong.
FIGURE 6 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 6. Species of Stomatorhinus to which Stomatorhinus ivindoensis n. sp. is closely compared in study: (A) S. walkeri syntype BMNH 1867.5. 3.16, 85.6 mm SL; (B) S. walkeri live specimen no. 2880, CU 80237, 95 mm SL; (C) S. fuliginosus syntype MRAC 6652, 37.7 mm SL; (D) S. fuliginosus syntype MRAC 6648, 33.5 mm SL; (E) S. polli paratype MRAC 138993, 61.3 mm SL; (F) S. polli paratype MRAC 138977, 58.7 mm SL.
FIGURE 4. A in A new small barb (Cyprininae: Smiliogastrini) from the Louesse, Lekoumou (upper Niari basin), and Djoulou (upper Ogowe basin) rivers in the Republic of Congo, west-central Africa
FIGURE 4. A, Known distributional range of Enteromius walshae; yellow stars indicate collection sites and red star indicates collection locality of holotype (AMNH 266856). B, Type locality of holotype, in a small tributary of the Mandoro River (upper Louesse River basin).
FIGURE 1 in A new small barb (Cyprininae: Smiliogastrini) from the Louesse, Lekoumou (upper Niari basin), and Djoulou (upper Ogowe basin) rivers in the Republic of Congo, west-central Africa
FIGURE 1. Enteromius species sampled (table 1), photographed immediately postmortem or in preservation: A, kuiluensis; B, martorelli; C, prionacanthus; D, rouxi, E, rubrostigma; F, trispilomimus; G, walshae new species; H, nigroluteus; I, brichardi; J, camptacanthus; K, chiumbeensis; L, diamounanganai; M, guirali; N, holotaenia; O, jae; P, catenarius; Q, castrasibutum. No tissues are currently available for E. catenarius. Photograph of E. castrasibutum courtesy of Jon Armbruster.
Linked collectors and determiners for: The montane trees of the Cameroon Highlands, West-Central Africa, with Deinbollia onanae sp. nov. (Sapindaceae), a new primate-dispersed, Endangered species.
Natural history specimen data linked to collectors and determiners held within, "The montane trees of the Cameroon Highlands, West-Central Africa, with Deinbollia onanae sp. nov. (Sapindaceae), a new primate-dispersed, Endangered species". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe">https://bionomia.net/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe">https://gbif.org/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe</a>. Formatted as a Frictionless Data package.
Optimizing maize yield in West and Central Africa
Open the record for dataset details and reuse information.
Data from: New evidence for hybrid zones of forest and savanna elephants in Central and West Africa
The African elephant consists of forest and savanna subspecies. Both subspecies are highly endangered due to severe poaching and habitat loss, and knowledge of their population structure is vital to their conservation. Previous studies have demonstrated marked genetic and morphological differences between forest and savanna elephants and despite extensive sampling, genetic evidence of hybridization between them has been restricted largely to a few hybrids in the Garamba region of northeastern Democratic Republic of Congo (DRC). Here we present new genetic data on hybridization from previously unsampled areas of Africa. Novel statistical methods applied to these data identify 46 hybrid samples - many more than have been previously identified - only two of which are from the Garamba region. The remaining 44 are from three other geographically-distinct locations: a major hybrid zone along the border of the DRC and Uganda, a second potential hybrid zone in Central African Republic, and a smaller fraction of hybrids in the Pendjari-Arli complex of West Africa. Most of the hybrids show evidence of interbreeding over more than one generation, demonstrating that hybrids are fertile. Mitochondrial and Y chromosome data demonstrate that the hybridization is bidirectional, involving males and females from both subspecies. We hypothesize that the hybrid zones may have been facilitated by poaching and habitat modification. The localized geography and rarity of hybrid zones, their possible facilitation from human pressures, and the high divergence and genetic distinctness of forest and savanna elephants throughout their ranges, are consistent with calls for separate species classification.
FIGURE 21 in The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species
FIGURE 21. Scatterplot of caudalfin length (CFL) against standard length for M. batesii, M. hirsutus and M. polli.
FIGURE 20 in The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species
FIGURE 20. Scatterplot of adiposefin basal length (AdiFL) against standard length for M. emarginatus, M. notatus and M. vigilis.
FIGURE 19 in The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species
FIGURE 19. Scatterplot of caudal peduncle depth (CPD) against standard length for M. notatus and M. vigilis.
FIGURE 2 in The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species
FIGURE 2. Lateral view of dorsal spines of: a. M. hirsutus, holotype, CU 87040, 62.0 mm SL and b. all other Microsynodontis (represented by M. batesii, CAS 155691, 62.4 mm SL). Scale bar represents 1 mm.
FIGURE 9 in The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species
FIGURE 9. Lateral view of caudal fins showing: a. emarginate fin (condition in Microsynodontis emarginatus, CU 89393, holotype, 33.4 mm SL); b. rounded fin (other Microsynodontis species, represented by M. batesii, CU 80748, 33.2 mm SL); c. truncate fin (condition in M. laevigatus and M. lamberti, represented by M. laevigatus, CU 88265, paratype, 22.8 mm SL).
FIGURE 4 in The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species
FIGURE 4. Dorsal view of pectoral spines of: a. M. armatus, holotype, CU 89392, 27.4 mm SL; b. M. christyi, MRAC 61801, 37.5 mm SL; c. M. emarginatus, paratype, CU 80567, 32.0 mm SL; d. M. laevigatus, paratype, CU 88265, 28.1 mm SL; e. M. notatus, holotype, MRAC 8051P839, 41.0 mm SL; f. all other Microsynodontis (represented by M. batesii, MRAC 93085P0280, 42.6 mm SL). Scale bar represents 1 mm.
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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.