Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
31
datasets available to search
ShareScore release 0.9.0
Dataset results
31 results for “Lontra”
Fig. 4 in Impacto de um desastre natural sobre o habitat e a ocorrência de Lontra longicaudis (Mustelidae, Carnivora) na Serra da Prata, Paraná, Brasil
Fig. 4. Imagem de satélite dos rios estudados entre agosto de 2012 e julho de 2013, Parque Nacional de Saint-Hilaire/Lange, Serra da Prata, ParanÁ, Brasil. A, Rio das Pombas (controle); B, Rio Santa Cruz (afetado). Pontos Pretos indicam o intervalo dos 30 trechos de 100 m ao longo dos rios estudados; CÍrculo Pontilhado, sequÊncia de quedas d'Água no Rio das Pombas e barragem de captaçÃo d'agua no Rio Santa Cruz; Triângulos, localizaçÃo das tocas e Quadrados, localizaçÃo dos vestÍgios (pegadas e fezes) das lontras no Rio Santa Cruz (para evitar a excessiva sobreposiçÃo de pontos na imagem do Rio das Pombas foram indicadas apenas as tocas das lontras).
Fig. 3 in Impacto de um desastre natural sobre o habitat e a ocorrência de Lontra longicaudis (Mustelidae, Carnivora) na Serra da Prata, Paraná, Brasil
Fig. 3. Rio Santa Cruz apÓs os deslizamentos de terra, fotografia capturada pela equipe de campo em outubro de 2012, Parque Nacional de Saint-Hilaire/ Lange, Serra da Prata, ParanÁ, Brasil. CÍrculo: localizaçÃo de uma pessoa para noçÃo de escala ~ 1,80 m.
Fig. 2 in Impacto de um desastre natural sobre o habitat e a ocorrência de Lontra longicaudis (Mustelidae, Carnivora) na Serra da Prata, Paraná, Brasil
Fig. 2. Rio Santa Cruz antes dos deslizamentos de terra. Ao fundo vÊ-se a represa de captaçÃo de Água. Fotografia da vistoria realizada pelos analistas ambientais do Parque Nacional de Saint-Hilaire/Lange em abril de 2010, Serra da Prata, ParanÁ, Brasil.
Fig. 1. A in Impacto de um desastre natural sobre o habitat e a ocorrência de Lontra longicaudis (Mustelidae, Carnivora) na Serra da Prata, Paraná, Brasil
Fig. 1. A: localizaçÃo geogrÁfica do Parque Nacional de Saint-Hilaire/Lange (PNSHL). B: contorno branco, limites do PNSHL; retângulo pontilhado: Área afetada pelos deslizamentos de terra em março de 2011 (projetada na imagem C); triângulos: localizaçÃo das Áreas de estudo (Rio Santa Cruz, Área afetada e Rio das Pombas, Área controle). C: imagem de satélite dos deslizamentos de terra no PNSHL (destaques em tonalidade clara); seta: leito do Rio Santa Cruz.
Fig. 5 in A new dracunculus species (Nematoda: Dracunculoidea) in neotropical otters (Lontra longicaudis) from Argentina: morphological and molecular characterization
Fig. 5. Maximum-likelihood trees constructed from (a) 18S rRNA and (b) COI sequences of Dracunculus jaguape n. sp. from Lontra longicaudis in Argentina compared with available sequences. Best-fitting substitution models using the Maximum-Likelihood model test were determined with the Akaike Information Criterion. Kimura 2-parameter was selected as the best model for 18S rRNA and Tamura-Nei with a discrete Gamma distribution was selected as the best model for COI. Numbers represent bootstrap support generated from 1000 replications. GenBank accession numbers are shown. Boldface indicates the strain identified in this study. Scale bars indicate nucleotide substitutions/site.
Fig. 4. Dracunculus jaguape n in A new dracunculus species (Nematoda: Dracunculoidea) in neotropical otters (Lontra longicaudis) from Argentina: morphological and molecular characterization
Fig. 4. Dracunculus jaguape n. sp. (a) Cephalic extremity of a male, lateral view. (b) Male tail, lateral view showing the spicules, and papillae. (c) Schematic male tail in ventral view. (d) Detailed of the spicule. (e) Detail of the gubernaculum.
Fig. 3. Dracunculus jaguape n in A new dracunculus species (Nematoda: Dracunculoidea) in neotropical otters (Lontra longicaudis) from Argentina: morphological and molecular characterization
Fig. 3. Dracunculus jaguape n. sp. (a) Anterior extremity of a male showing the oesophagus swelling, deirid and nerve ring. (b) Cephalic extremity, lateral view showing the cephalic papillae. (c) Anterior extremity of a gravid female. (d) Cephalic extremity, lateral view. (e) Detail of dorsal papillae, (f) Larvae with long and tapered tail, removed from the uterus. a: anus, d: deirid, ep: excretory pore, nr: nerv ring, s: glandular oesophagus swelling, o-i: oesophagus-intestine junction, p: papillae.
Fig. 2 in A new dracunculus species (Nematoda: Dracunculoidea) in neotropical otters (Lontra longicaudis) from Argentina: morphological and molecular characterization
Fig. 2. Neotropical otters (Lontra longicaudis) dead and Dracunculus parasites in subcutaneous tissues.
Fig. 4 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 4. Large clusters of Dracunculus insignis in paws (A) and joint (B) of North American river otter (Lontra canadensis) from Missouri, USA.
Fig. 3 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 3. Surgical removal of a Clade 2 Dracunculus sp. (FL15-33934) from a North American river otter (Lontra canadensis) from Florida, USA.
Fig. 1 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 1. Distribution of Dracunculus spp. in North American river otters (Lontra canadensis) in North America. Species identifications are based on molecular identification or male morphology.
Fig. 2 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 2. Posterior end of a male worm of a Clade 1 Dracunculus sp. (NC-otter8C) from a North American river otter (Lontra canadensis) from North Carolina showing the paired spicules (A), gubernaculum (B, C), and the bulbous posterior end of the tail (D).
Fig. 5 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 5. Genetic relationships of Dracunculus spp. from North American river otters (Lontra canadensis) compared with other Dracunculus spp. based on partial cytochrome c oxidase subunit 1 gene sequences. The text in bold in the figure represents specimens analyzed in this study. Sequences with an asterisk (*) were derived from river otters (current and previous studies).
Data from: Molecular ecology of the Neotropical otter (Lontra longicaudis): non-invasive sampling yields insights into local population dynamics
Non-invasive genetic analysis has been frequently employed to estimate ecological and population parameters for many secretive and/or threatened species. However, Neotropical carnivores have so far been scarcely targeted by such studies. The Neotropical otter (Lontra longicaudis) is a poorly-known species for which local levels of genetic diversity and demographic parameters are virtually absent. We employed non-invasive sampling and amplification of microsatellite loci to investigate population size and density, spatial organization, and relatedness of a wild Neotropical otter population in an Atlantic forest area in southern Brazil. We directly identified 28 individuals and estimate a rather high population density at the study site. Spatial organization analysis indicated that male cumulative displacement was higher than that of females, with the latter sex showing evidence of philopatric behaviour. Also, the reconstruction of genealogical relationships suggests that spatial organization in this otter appears to be influenced by relatedness. By allowing the testing of specific hypothesis targeting these issues, our results provided important glimpses into the Neotropical otter's population biology. Moreover, the findings of the present study reaffirm the power of non-invasive genetics to investigate the biology of this elusive species, and open up new avenues for ecological and demographic studies of other Neotropical carnivores.
Data from: Impact of population expansion on genetic diversity and structure of river otters (Lontra canadensis) in central North America
Populations of North American river otters (Lontra canadensis) declined throughout large portions of the continent during the early 1900s due to habitat degradation and unregulated trapping. River otters had been extirpated in North Dakota (ND), but the Red River Valley has since been recolonized, with potential source populations including the neighboring states of Minnesota or South Dakota, or the Canadian province of Manitoba (MB). We genotyped 9 microsatellite loci in 121 samples to determine the source population of river otters in the Red River Valley of ND, as well as to assess population structure and diversity of river otters in central North America. Overall, genetic diversity was high, with an average observed heterozygosity of 0.58. Genetic differentiation was low (F ST < 0.05) between river otters in ND and those of Minnesota, suggesting that eastern ND was recolonized by river otters from Minnesota. River otters from MB were genetically distinct from all other sampled populations. Low genetic differentiation (F ST = 0.044) between South Dakota and Louisiana (LA) suggested that reintroductions using LA stock were successful. The genetic distinctiveness of river otters from different geographic regions should be considered when deciding on source populations for future translocations.
On following pages: 29. Marine Otter (Lontra felina); 30. Neotropical Otter (Lontra longicaudis); 31. Southern River Otter (Lontra provocax); 32. Sea Otter (Enhydra lutris); 33. Spotted-necked Otter (Hydrictis maculicollis); 34. Eurasian Otter (Lutra lutra); 35. Hairy-nosed Otter (Lutra sumatrana); 36. African Clawless Otter (Aonyx capensis); 37. Asian Small-clawed Otter (Aonyx cinereus); 38. Smooth-coated Otter (Lutrogale perspicillata). in Mustelidae
On following pages: 29. Marine Otter (Lontra felina); 30. Neotropical Otter (Lontra longicaudis); 31. Southern River Otter (Lontra provocax); 32. Sea Otter (Enhydra lutris); 33. Spotted-necked Otter (Hydrictis maculicollis); 34. Eurasian Otter (Lutra lutra); 35. Hairy-nosed Otter (Lutra sumatrana); 36. African Clawless Otter (Aonyx capensis); 37. Asian Small-clawed Otter (Aonyx cinereus); 38. Smooth-coated Otter (Lutrogale perspicillata).
Lontra felina
Cráneo de *Lontra felina*, más conocido como chungungo, gato de mar, entre otros nombres. Es una nutria que habita en las costas pacíficas de Sudamérica, específcamente las de Perú y Chile. Este cráneo pertenece a la colección del Área de Zoología de Vertebrados del MNHN. Source: Objaverse 1.0 / Sketchfab
Figure 3 in The first genomic resource for the 'near threatened' Neotropical otter Lontra longicaudis (Carnivora: Mustelidae): mitochondrial genome characterisation and insights into phylomitogenomic relationships in the family Mustelidae
Figure 3. An analysis of selective pressure in the protein coding genes (PCGs) of Lontra longicaudis indicates that the Ka/Ks value can show whether a gene is undergoing selection, and based on the magnitude of the value, what type of selection is taking place. Ka/Ks values <1 indicate purifying selection, whereas values equal to 1 indicate neutral selection. The Ka/Ks ratios (vertical axis) were calculated for each of the 13 PCGs (horizontal axis) by performing pairwise comparisons with L. lutra. Photo credit: John Tomsett.
Figure 6 in The first genomic resource for the 'near threatened' Neotropical otter Lontra longicaudis (Carnivora: Mustelidae): mitochondrial genome characterisation and insights into phylomitogenomic relationships in the family Mustelidae
Figure 6. Phylomitogenomic analysis of Lontra longicaudis and related species in the family Mustelidae. Total-evidence phylogenetic tree obtained from ML analysis based on a concatenated alignment of amino acids of the 13 protein-coding genes present in the mitochondrial genome of representatives of the family Mustelidae. The branches are colour coded to represent their respective bootstrap values. Photo credit: John Tomsett.
Figure 2 in The first genomic resource for the 'near threatened' Neotropical otter Lontra longicaudis (Carnivora: Mustelidae): mitochondrial genome characterisation and insights into phylomitogenomic relationships in the family Mustelidae
Figure 2. Codon usage analysis of PCGs in the mitochondrial genome of Lontra longicaudis. All 20 amino acids [adenine (A), cysteine (C), aspartic acid (D), glutamic acid (E), phenylalanine (F), glycine (G), histidine (H), isoleucine (I), lysine (K), leucine (L), methionine (M), asparagine (N), proline (P), glutamine (Q), arginine (R), serine (S), threonine (T), valine (V), tryptophan (W), tyrosine (Y)] are listed by their one-letter abbreviations along the horizontal axis. Each amino acid comprises several codons that are listed and colour coded below their respective amino acid. The length of the coloured regions indicates the frequency of the respective codon within that amino acid. The vertical axis represents the RSCU values for the amino acids.
ScienceDex guides
Understand access before you commit
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.