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1,999 results for “Endangered”
Putative parapoxvirus-associated foot disease in the endangered huemul deer (Hippocamelus bisulcus) in Bernardo O'Higgins National Park, Chile
<p>The huemul (Hippocamelus bisulcus) is an endangered cervid endemic to southern Argentina and Chile. Here we report foot lesions in 24 huemul from Bernardo O’Higgins National Park, Chile, between 2005 and 2010. Affected deer displayed variably severe clinical signs, including lameness and soft tissue swelling of the limbs proximal to the hoof or in the interdigital space, ulceration of the swollen tissues, and some developed severe proliferative tissue changes that caused various types of abnormal wear, entrapment, and/or displacement of the hooves and/or dewclaws. Animals showed signs of intense pain and reduced mobility followed by loss of body condition and recumbency, which often preceded death. The disease affected both genders and all age categories. Morbidity and mortality reached 80% and 40%, respectively. Diagnostics were restricted to a limited number of cases from which samples were available. Histology revealed severe papillomatous epidermal hyperplasia and superficial dermatitis. Electron microscopy identified viral particles consistent with viruses in the Chordopoxvirinae subfamily. The presence of parapoxvirus DNA was confirmed by a pan-poxvirus PCR assay, showing high identity (98%) with bovine papular stomatitis virus and pseudocowpoxvirus. This is the first report of foot disease in huemul deer in Chile, putatively attributed to poxvirus. Given the high morbidity and mortality observed, this virus might pose a considerable conservation threat to huemul deer in Chilean Patagonia. Moreover, this report highlights a need for improved monitoring of huemul populations and synergistic, rapid response efforts to adequately address disease events that threaten the species.</p>
Endangered Languages
<p>Description of endagered and dead languages of the planet provided by the Guardian.</p>
Anthropogenic pressures drive population genetic structuring across a Critically Endangered lemur species range
<p>Includes initial input landscape surfaces (.acs) and final resistance surfaces (.out) generated during the current study.</p>
Fig. 5 in Stichelia pelotensis (Lepidoptera, Riodinidae): conservation, notes, and rediscovery of an endangered butterfly from southern Brazil
Fig. 5. Knowing distribution of Stichelia pelotensis in Rio Grande do Sul state, Brazil.
Figure 3. E in 'Endangered' or 'Near Threatened', distribution status of Karaavali Skittering frog from the west coast of peninsular India
Figure 3. E. karaavali in life from Calicut township, Kozhikode, Kerala.
Figure 2 in 'Endangered' or 'Near Threatened', distribution status of Karaavali Skittering frog from the west coast of peninsular India
Figure 2. Maximum likelihood tree for the genus Euphlyctis based on 573 bp of 16S rRNA.
Figure 2 in Heavy metal accumulation as a threat to the endangered Egyptian vulture (Neophron percnopterus L.) in Turkey
Figure 2. Distribution of As values for calamus and vane (Z= –2.49, P = 0.01).
Figure 1 in Heavy metal accumulation as a threat to the endangered Egyptian vulture (Neophron percnopterus L.) in Turkey
Figure 1. Study area and the sampled nests.
Figure 1 in Current and suitable habitat of the Critically endangered Northern white-cheeked gibbon (Nomascus leucogenys) in Lao PDR
Figure 1. Map of all present locations of N. leucogenys showing the study area.
Fig. 2 in New sites of the endangered Marmaris Salamander, Lyciasalamandra flavimembris (Mutz and Steinfartz 1995), (Caudata: Salamandridae) from Muğla, Turkey
Fig. 2. General view of new site habitats. [A]. Arıcılar, [B,C]. Selimiye [D]. Taşlıca.
Fig. 1 in A global checklist of the parasites of the harbor porpoise Phocoena phocoena, a critically-endangered species, including new findings from the Baltic Sea
Fig. 1. The harbor porpoise parasites load (number of species/number of individuals).
US Fish and Wildlife Service Endangered Species Listings
<p>United States Fish and Wildlife Service (USFWS). As the principal federal partner responsible for administering the Endangered Species Act (ESA), we take the lead in recovering and conserving our nation__s imperiled species by fostering partnerships, employing scientific excellence, and developing a workforce of conservation leaders. As we work in partnership with others, our two major goals are to: Protect endangered and threatened species, and then pursue their recovery; and Conserve candidate species and species-at-risk so that listing under the ESA is not necessary. https://www.fws.gov/endangered/species/</p>
FIGURE 1 in Population genetics of the endangered catfish Pseudoplatystoma magdaleniatum (Siluriformes: Pimelodidae) based on species-specific microsatellite loci
FIGURE 1 | Sampling sites of Pseudoplatystoma magdaleniatum in the Magdalena-Cauca basin.
Fig. 2 in Ecology of Mylesinus paucisquamatus Jégu & Santos, 1988, an endangered fish species from the rio Tocantins basin
Fig. 2. Number of individuals of Mylesinus paucisquamatus
FIGURE 4 in New occurrences of the endangered Notholebias minimus (Cyprinodontiformes: Rivulidae) in coastal plains of the State of Rio de Janeiro, Brazil: populations features and conservation
FIGURE 4 | Length-weight relationship of Notholebias minimus (N = 43).
Fig. 16 in Pollinia removal and suspected pollination of the endangered ghost orchid, Dendrophylax lindenii (Orchidaceae) by various hawk moths (Lepidoptera: Sphingidae): another mystery dispelled
Fig. 16. Photo of Dendrophylax lindenii pollinia.
Image 2 in Discovery of the Critically Endangered annual killifish Austrolebias wolterstorffi (Ahl, 1924) (Cyprinodontiformes: Rivulidae) in Lagoa do Peixe National Park, Rio Grande do Sul, southern Brazil
Image 2. Occurence site of Austrolebias wolterstorffi in Lagoa do Peixe National Park.
Skull shape of a widely-distributed, endangered marsupial reveals little evidence of local adaptation between fragmented populations
<p>The biogeographical distribution of diversity among populations of threatened mammalian species is generally investigated using population genetics. However, intraspecific phenotypic diversity is rarely assessed beyond taxonomy-focused linear measurements or qualitative descriptions. Here, we use a technique widely used in the evolutionary sciences – geometric morphometrics – to characterize shape diversity in the skull of an endangered marsupial, the northern quoll, across its 5,000 km distribution range along Northern Australia. Skull shape is a proxy for feeding, behaviour, and phenotypic differentiation, allowing us to ask if populations can be distinguished and if patterns of variation indicate adaptability to changing environmental conditions. We analysed skull shape in 101 individuals across four mainland populations and several islands. We assessed the contribution of population, size, sex, rainfall, temperature, and geography to skull shape variation using Principal Components Analysis, Procrustes ANOVA, and variation partitioning analyses. The populations harbour similar amounts of broadly overlapping skull shape variation, with relatively low geographic effects. Size predicted skull shape best, coinciding with braincase size variation and differences in zygomatic arches. Size-adjusted differences in populations explained less variation with far smaller effect sizes, relating to changes in the insertion areas of masticatory muscles, as well as the upper muzzle and incisor region. Climatic and geographic variables contributed little. Strikingly, the vast majority of shape variation - 76% - remained unexplained. Our results suggest a uniform intraspecific scope for shape variation, possibly due to allometric constraints or phenotypic plasticity beyond the relatively strong allometric effect. The lack of local adaptation indicates that cross-breeding between populations will not reduce local morphological skull (and probably general musculoskeletal) adaptation because none exists. However, the potential for heritable morphological variation (e.g. specialization to local diets) seems exceedingly limited. We conclude that 3D geometric morphometrics can provide a comprehensive, statistically rigorous phenomic contribution to genetics-based conservation studies.</p>
Metapopulation connectivity retains genetic diversity following historical bottleneck in a federally endangered seabird
<p>Despite intensive management since the 1970s, recovery of the endangered northwestern Atlantic population of the Roseate Tern (<i>Sterna dougallii dougallii</i>) has not offset low productivity from a female-biased sex ratio, low adult survival, and habitat constriction. Now, >90% of individuals breed at three sites within 200 km from Long Island, NY to Buzzards Bay, MA (warm-water subregion). To characterize the impact of historical bottlenecks, metapopulation structure, and demographic fluctuations on genetic variation, Roseate Terns from the warm-water (1870s, 1970s, 1997, 2016) and cold-water (Nova Scotia, Canada; 2018) subregions were genotyped at 8-16 microsatellites and two-three mitochondrial regions. Diversity declined in the warm-water subregion from the 1870s (H<sub>E</sub>= 0.44, A<sub>R</sub>= 2.86) and 1970s (H<sub>E</sub> = 0.53, A<sub>R </sub>= 3.25) to 1997 (H<sub>E</sub> = 0.38, A<sub>R </sub>= 2.58). Genetic signatures of bottlenecks persisted in 1997 (<i>P</i> = 0.001 – 0.003) and 2016 (<i>P</i> = <0.001 – 0.005), but an increase in variation occurred by 2016 (H<sub>E</sub>= 0.50, A<sub>R</sub>= 2.85). Weak structure was detected between contemporary warm- and cold-water subregions (θ = 0.06) and within the warm-water subregion (θ = 0.04). Both demographic (<span><span></span></span>= 3439-3821) and genetic (<span><span></span></span>= 3040) estimates suggested effective population size stability over the last 100 years, despite large fluctuations in census size (4000 – 8662). Results suggest that 50 years of management (restoring habitat, preventing gull encroachment, controlling predators) at colony sites supported a small, stable <i>N<sub>e</sub></i> and maintained a hierarchical metapopulation that allowed gene flow to redistribute genetic variation throughout the NW Atlantic. The metapopulation remains highly vulnerable to stochastic events but harbors resiliency and redundancy through gene flow and a stable <i>Ne</i>. For long-term persistence from a genetic perspective, managers must maintain the major source colonies, increase availability of high-quality peripheral breeding sites, and protect concentrated non-breeding sites that facilitate gene flow.</p>
Data from: Detection of the endangered European weather loach (Misgurnus fossilis) via water and sediment samples: testing multiple eDNA workflows.
<p>The European weather loach (<i>Misgurnus fossilis</i>) is classified as highly endangered in several countries of Central Europe. Populations of <i>M. fossilis</i> are predominantly found in ditches with low water levels and thick sludge layers and are thus hard to detect using conventional fishing methods. Therefore, environmental DNA (eDNA) monitoring appears particularly relevant for this species. In previous studies, <i>M. fossilis</i> was surveyed following eDNA water sampling protocols, which were not optimized for this species. Therefore, we created two full factorial study designs to test six different eDNA workflows for sediment samples and twelve different workflows for water samples. We used qPCR to compare the Threshold cycle (Ct) values of the different workflows, which indicate the target DNA amount in the sample, and spectrophotometry to quantify and compare the total DNA amount inside the samples. We analyzed 96 water samples and 48 sediment samples from a pond with a known population of <i>M. fossilis</i>. We tested several method combinations for long-term sample preservation, DNA capture and DNA extraction. Additionally, we analyzed the DNA yield of samples from a ditch with a natural <i>M. fossilis</i> population monthly over one year to determine the optimal sampling period. Our results showed that the long-term water preservation method commonly used for eDNA surveys of <i>M. fossilis </i>did not lead to optimal DNA yields, and we present a valid long-term sample preservation alternative. A cost-efficient high salt DNA extraction led to the highest target DNA yields and can be used for sediment and water samples. Furthermore, we were able to show that in a natural habitat of <i>M. fossilis</i>, total and target eDNA were higher between June and September, which implies that this period is favorable for eDNA sampling. Our results will help to improve the reliability of future eDNA surveys of <i>M. fossilis</i>.</p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.