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18 results for “Lontra longicaudis”
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.
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.
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).
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.
Figure 5 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 5. Characteristics of the domains found in the D-Loop/CR of the Lontra longicaudis mitochondrial genome. Top: Features observed in all three well-conserved domains. Centre: Secondary structure of long tandem repeat observed in the CSB region, between CSB1 and CSB2. Bottom: D-Loop/CR sequence in which the different features have been highlighted with different colours.
Figure 1 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 1. Circular DNA mitochondrial genome map of Lontra longicaudis. The annotated map depicts 13 protein-coding genes (PCGs), two ribosomal RNA genes (rrnS: 12S ribosomal RNA and rrnL: 16S ribosomal RNA), 22 transfer RNA (tRNA) genes, and the putative control region. Photo credit: John Tomsett.
Figure 4 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 4. tRNAs in the mitochondrial genome of Lontra longicaudis usually display 'cloverleaf̍ secondary structures; however, in Serine 1 (tRNA-Ser(AGY) or trnS1), the DHU loop (3–4bp) was absent. The truncation of this tRNA is a conserved trait in metazoans.
Data from: Molecular ecology of the Neotropical otter (Lontra longicaudis): non-invasive sampling yields insights into local population dynamics
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Fig. 1 in A new dracunculus species (Nematoda: Dracunculoidea) in neotropical otters (Lontra longicaudis) from Argentina: morphological and molecular characterization
Fig. 1. Location of Corrientes province, Argentina, in South America (inset). Map of Corrientes showing the road-killed animals.
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