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609 results for “Critically endangered”
Figure 1 in Rediscovery of two critically endangered species of freshwater crabs, Afrithelphusa afzelii (Colosi, 1924) and A. leonensis (Cumberlidge, 1987) (Brachyura: Potamoidea: Deckeniidae) from the rainforests of Sierra Leone: implications for conservation
Figure 1. Collection localities of the two Afrithelphusa species in Sierra Leone. Inset maps show the continent of Africa and Sierra Leone and its neighbouring countries in West Africa. Red rectangle = A. afzelii, yellow pentagon = A. leonensis, grey shaded area = biodiversity hotspot identified by Conservation International (2011).
FIGURE 9 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 9. Habitat of Ponticola hircaniaensis sp. nov., above the Zarrin Gol Dam (A), Kaboudval Stream (B). Photos: A from Google Earth, B by F. Zarei.
FIGURE 5 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 5. Ponticola hircaniaensis sp. nov.: (A) ZM-CBSU S101-6, male, holotype, 76.9 mm SL; (B) ZM-CBSU S099-5, male, paratype, 73.6 mm SL; (C) ZM-CBSU S099-11, male, paratype, 76.0 mm SL. All from the Kaboudval Stream, southern Caspian Sea basin. Photos by F. Zarei, Y. Bakhshi, & A. Jouladeh-Roudbar.
FIGURE 1 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 1. Left sagittal otolith (inner face) of Ponticola hircaniaensis sp. nov. (ZM-CBSU K28, 66.65 mm SL, Kaboudval Stream), showing the terminology of characters and otolith shape outline (red line). OL, maximal otolith length; OL2, minimal otolith length measured at maximum ingression of concavity of posterior rim; OH, maximal otolith height; OA, otolith area; OP, otolith perimeter; SU, sulcus; ca, cauda; os, ostium; ol, ostila lobe; CL, colliculum length measured along its axis; si, subcaudal igum; α, inclination angle of ostium measured from tip of ostium through midpoint of sulcus height at collum; β, inclination angle of anterior rim; γ, inclination angle of posterior rim; δ, inclination of line connecting preventral angle with tip of posterodorsal projection.
FIGURE 8 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 8. Distribution map of the Ponticola spp. in the south Caspian Sea basin, showing the type locality of Ponticola hircaniaensis sp. nov., Kaboudval Stream (large black square). Map by F. Zarei.
FIGURE 4 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 4. Genetic alignment of the nuclear S7 gene fragment between 466 and 547 nucleotide positions. Chromatograms show the hybrid [middle: molecular ID: 3435 (GenBank number: ON186770), Kaboudval Stream] individual's heterozygous peaks (underlined with black bars) at the diagnostic sites, where Ponticola hircaniaensis sp. nov. [top: molecular ID: 3432 (GenBank number: ON186768), Kaboudval Stream] and P. gorlap [bottom: molecular ID: 2786 (GenBank number: ON186767), Babolroud River] present fixed differences.
FIGURE 7 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 7. Otolith morphology (sagittae, inner face) of the studied Ponticola spp. (a–d) Ponticola hircaniaensis sp. nov.: ZM-CBSU K18, K21, K24, and K28, respectively (64.0–74.6 mm SL). (e–h) Ponticola iranicus: ZM-CBSU 37, 40, 141, and 144, respectively (71.6–76.4 mm SL). (i–l) Ponticola patimari: ZM-CBSU P2, P3, P4, and P6, respectively (53.9–65.2 mm SL). (m–p) Ponticola gorlap: ZM-CBSU 44, 45, 46, and 48, respectively (71.6–86.5 mm SL). (q–r) Ponticola iljini: ZMMSU P-23516 (90–95 mm SL) (refigured from Vasil'eva et al. 2016). (s–t) Ponticola kessleri: non-cataloged specimens from the RBINS collection (77–92 mm SL) (refigured from Jacobs & Hoedemakers 2013). (u–v) Ponticola syrman: ZM-CBSU 77, and 78, respectively (128.1–181.4 mm SL).
FIGURE 6 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 6. Head lateral line system (left side) of Ponticola hircaniaensis sp. nov. ZM-CBSU S099-8, paratype, male, 78.4 mm SL, Kaboudval Stream, south Caspian Sea basin. Terminology in text. Drawing by F. Zarei.
FIGURE 10 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 10. Valid Ponticola species of the southern Caspian Sea and its drainages: (A) Ponticola gorlap, uncatalogued, Iran, Gilan prov., Polroud River, southern Caspian Sea basin. (B) Ponticola iranicus, uncatalogued, Iran, Gilan prov., Sefidroud at Imamzadehashem, southern Caspian Sea basin. (C) Ponticola patimari, uncatalogued, Iran, Mazandaran prov., Chalus River, southern Caspian Sea basin. (D) Ponticola syrman, ZM-CBSU S065.2-1, 183.2 mm SL, Iran. Mazandaran prov., Neka beach, southern Caspian Sea. (E) Ponticola cyrius, uncatalogued, Turkey, Kura River at Yalnýzçam. Photos: A–D by F. Zarei, and E by C. Kaya.
FIGURE 3 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 3. Median-joining haplotype network of 82 COI sequences belonging to 15 species of Ponticola including P. hircaniaensis sp. nov. The haplotype of hybrid individuals is marked with a star inside. Circle sizes depict frequencies of haplotypes; the smallest corresponds to one. Small black circles correspond to missing/hypothetical haplotypes. Numbers represent mutational steps between neighboring haplotypes; lines without mutation numbers indicate one mutational step.
FIGURE 2 in Ponticola hircaniaensis sp. nov., a new and critically endangered gobiid species (Teleostei: Gobiidae) from the southern Caspian Sea basin
FIGURE 2. Maximum Likelihood (ML) and Bayesian (BI) phylogeny of the genus Ponticola reconstructed based on COI gene sequences. The values beside the branches before and after a slash are BI posterior probabilities and ML bootstrap values, respectively. Grey bars to the right indicate species delimitation results from the ABGD, ASAP, mPTP, bPTP, and SP methods.
Evolutionary processes in an undescribed eucalypt: implications for the translocation of a critically endangered species
<p>Background and Aims Knowledge of the evolutionary processes responsible for the distribution of threatened and highly localised species is important for their conservation. Population genomics can provide insights into evolutionary processes to inform management practices, including the translocation of threatened plant species. In this study, we focus on a critically endangered eucalypt, Eucalyptus sp. Cattai, which is restricted to a 40 km 2 area of Sydney, Australia and is threatened by increased urbanisation. Eucalyptus sp. Cattai is yet to be formally described in part due to its suspected hybrid origin. Here, we examined evolutionary processes and species boundaries in E. sp. Cattai to determine whether translocation was warranted. Methods We used genome-wide scans to investigate the evolutionary relationships of E. sp. Cattai with related species, and to assess levels of genetic health and admixture. Morphological trait and genomic data were obtained from seedlings of E. sp. Cattai propagated in a common garden to assess their genetic provenance and hybrid status. Key Results All analyses revealed that E. sp. Cattai was strongly supported as a distinct species. Genetic diversity varied across populations, and clonality was unexpectedly high. Interspecific hybridisation was detected, and was more prevalent in seedlings compared to in situ adult plants, indicating that post-zygotic barriers may restrict the establishment of hybrids. Conclusions Multiple evolutionary processes (e.g., hybridisation and clonality) can operate within the one rare and restricted species. Insights regarding evolutionary processes from our study were used to assist with the translocation of genetically 'pure' and healthy ex situ seedlings to nearby suitable habitat. Our findings demonstrate that it is vital to provide an understanding of evolutionary relationships and processes with an examination of population genomics in the design and implementation of an effective translocation strategy.</p>
Ecological impacts of unsustainable sand mining: Urgent lessons learned from a critically endangered freshwater cetacean
<p>Sand production, tripled in the last two decades, is an emerging concern for global biodiversity. However, the paucity of sand mining data worldwide prevents understanding the extent of sand mining impacts and how it affects wildlife populations and ecosystems, which is critical for timely mitigation and conservation actions. Integrating remote sensing and field surveys over fourteen years, we investigated mining impacts on the critically endangered Yangtze finless porpoise (<em>Neophocaena asiaeorientalis asiaeorientalis</em>) in Dongting Lake, China. We found that sand mining presented a consistent, widespread disturbance in Dongting Lake. The porpoise strongly avoided mining sites, especially the areas subjected to higher mining intensity. The extensive sand mining significantly contracted the porpoise's range and restricted their habitat use in the lake. Water traffic for sand transportation further blocked the species' river-lake movements, affecting the population connectivity. In addition, mining-induced loss of nearshore habitats, a critical foraging and nursery ground for the porpoise, occurred in nearly 70% of the water channels of our study region. Our findings provide the first empirical evidence on the impacts of unregulated sand extractions on species distribution. Our spatiotemporally explicit approach and findings can support regulation and conservation, yielding broader implications for sustainable sand mining worldwide.</p> <p>This dataset contains (1) sand mining information from 2006–2019 in Dongting Lake, (2) data of porpoise distributions from nine range-wide surveys from 2006–2019, (3) water traffic information at the outlet channel of Dongting Lake from 2001–2019, (4) data of the lake morphology from 2006–2019, (5) codes for all data analyses.</p>
The ancestral origin of the critically endangered Quadricorna sheep as revealed by genome-wide analysis.
<p>These data were used in "The ancestral origin of the critically endangered Quadricorna sheep as revealed by genome-wide analysis" by Senczuk et al.</p> <p>ARSIAL.ped and ARSIAL.map contains genotypes information (64.734 SNPs) of 47 individuals of the Quadricorna breed in Plink ped format.</p>
FIGURE 4 in Enduring the Earthquake: Rediscovery of the Critically Endangered Mesilau Stream Toad, Ansonia guibei Inger, 1966 (Anura, Bufonidae) and its conservation implications
FIGURE 4. Locations around Mesilau, Sabah where Ansonia guibei adult and tadpoles were recently detected.
FIGURE 3 in Enduring the Earthquake: Rediscovery of the Critically Endangered Mesilau Stream Toad, Ansonia guibei Inger, 1966 (Anura, Bufonidae) and its conservation implications
FIGURE 3. Tadpoles of Ansonia guibei. A. Small group of A. guibei tadpoles grazing on a rock at night along the edge of the Mesilau East River. B. Uncollected tadpole of A. guibei from Mesilau East River. C. Uncollected tadpole of A. guibei from Tibabar Stream. Note the characteristic divided lower jaw beaks that distinguish them from other Bornean Ansonia tadpoles. Photographs by Evan S.H. Quah.
FIGURE 2 in Enduring the Earthquake: Rediscovery of the Critically Endangered Mesilau Stream Toad, Ansonia guibei Inger, 1966 (Anura, Bufonidae) and its conservation implications
FIGURE 2. Breeding habitat of Ansonia guibei at Mesilau, Sabah. A. Habitat at Mesilau East River. B. Habitat at Tibabar Stream. C. Aggregation of A. guibei tadpoles clinging to the rocks in the clear, fast-flowing waters of the Mesilau East River during the daytime. Photographs by Evan S.H. Quah.
FIGURE 5 in Enduring the Earthquake: Rediscovery of the Critically Endangered Mesilau Stream Toad, Ansonia guibei Inger, 1966 (Anura, Bufonidae) and its conservation implications
FIGURE 5. Habitat damage caused by the 2015 earthquake along various sections of the Mesilau East River. A & B. Uprooted trees and landslides along the banks of the river. C. Siltation in the river during the rainy season caused by the soil and rubble being eroded into the river on the exposed banks. Photographs by Evan S.H. Quah.
FIGURE 1 in Enduring the Earthquake: Rediscovery of the Critically Endangered Mesilau Stream Toad, Ansonia guibei Inger, 1966 (Anura, Bufonidae) and its conservation implications
FIGURE 1. Ansonia guibei and its habitat at Mesilau, Sabah. A. Mesilau Cave, the type locality of A. guibei. B. Dorsolateral aspect of A. guibei (BORNEENSIS HEP 10605) in life. C. Venter of A. guibei (BORNEENSIS HEP 10605) in life. D. Dorsum of A. guibei (BORNEENSIS HEP 10605) in preservation. E. Venter of A. guibei (BORNEENSIS HEP 10605) in preservation. Photographs by Evan S.H. Quah.
Fig. 7 in Eucalyptus cryptica (Myrtaceae): a critically endangered new species
Fig. 7. Images of Eucalyptus cryptica. (a, d) Type locality, without associated voucher; (b, e) T.C.Wilson 830; (c) T.C.Wilson 829. (a) Mallee tree habit in heath; (b) sample of bark, branchlet with unopened inflorescences and senesced branchlet with fruit; (c) inflorescence; (d) flowers at anthesis; (e) oblique view of infructescence showing undehisced fruit. Scale bar: (b) 30 mm; (c) 10 mm; (d, e) 5 mm. Photographs: E. Lee (a, d) and T. C. Wilson (b, c, e).
ScienceDex guides
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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.