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20 results for “giant anteater”
Data from: Cranial anatomy of the giant anteater from north-western Venezuela (Myrmecophaga tridactyla artata, Pilosa: Myrmecophagidae)
<p>Annotated R codes and datasets used in: Carrillo et al. 2022. Cranial anatomy of the giant anteater from north-western Venezuela (<em>Myrmecophaga tridactyla artata</em>, Pilosa: Myrmecophagidae). <em>Anartia</em></p>
Fig. 4 in Anteaters on the edge: giant and lesser anteaters (Myrmecophaga tridactyla and Tamandua tetradactyla) at their geographic distributional limits in Paraguay
Fig. 4. Capture success (%) of lesser anteater (Tamandua tetradactyla Linnaeus, 1758) and giant anteater (Myrmecophaga tridactyla Linnaeus, 1758) in the Humid Chaco Ecoregion in Paraguay using trap-cameras from November 2016 to March 2018 by forest types: W-RF, Riparian forests associated to wetlands; MXF, Mesoxerophytic semi-deciduous forests dominated by Schinopsis balansae; FSF, Floodable sub-humid forest islets.
Figs 2, 3 in Anteaters on the edge: giant and lesser anteaters (Myrmecophaga tridactyla and Tamandua tetradactyla) at their geographic distributional limits in Paraguay
Figs 2, 3. Photos taken by trap cameras in the Humid Chaco Ecoregion in Paraguay: 2) Giant anteater (Myrmecophaga tridactyla Linnaeus, 1758) on March 20th, 2017; 3) Lesser anteater (Tamandua tetradactyla Linnaeus, 1758) on November 28th, 2017.
Fig. 1 in Anteaters on the edge: giant and lesser anteaters (Myrmecophaga tridactyla and Tamandua tetradactyla) at their geographic distributional limits in Paraguay
Fig. 1. Location of the study area in the Humid Chaco Ecoregion in Paraguay (left) and camera-trap ubications from November 2016 to March 2018. The numbers of the amplified area (right) indicate the date and season in which the trap cameras were placed in the different forests types (see Tab. I).
Fig. 5 in Anteaters on the edge: giant and lesser anteaters (Myrmecophaga tridactyla and Tamandua tetradactyla) at their geographic distributional limits in Paraguay
Fig. 5. Records (%) by hour of the day of giant anteater (Myrmecophaga tridactyla Linnaeus, 1758) and lesser anteater (Tamandua tetradactyla Linnaeus, 1758) in the Humid Chaco Ecoregion in Paraguay using trap-cameras from November 2016 to March 2018.
Figs. 7–11 in New morphological and genetic data of Gigantorhynchus echinodiscus (Diesing, 1851) (Acanthocephala: Archiacanthocephala) in the giant anteater Myrmecophaga tridactyla Linnaeus, 1758 (Pilosa: Myrmecophagidae)
Figs. 7–11. Light microscopy of adult Gigantorhynchus echinodiscus from Mymercophaga tridactyla. 7. Proboscis with a crown of large hooks in the apex and small hooks, and a proboscis receptacle (Re); 8. Trunk with pseudo segmentation (arrows) and the end of the lemnisci (Le); 9. Male reproduction organs, testis (Te), cement glands in pair (Cgl), ejaculatory duct (Ed); 10. Detail of the posterior end of adult female showing the uterus (Ut), vagina (Va, arrow) and gonopore subterminal (Gp); 11. Egg ellipsoid showing the outer membrane thick (Om), inner membrane (Im) thin, embryo (Em).
Figs.1–6 in New morphological and genetic data of Gigantorhynchus echinodiscus (Diesing, 1851) (Acanthocephala: Archiacanthocephala) in the giant anteater Myrmecophaga tridactyla Linnaeus, 1758 (Pilosa: Myrmecophagidae)
Figs.1–6. Line drawing of Gigantorhynchus echinodiscus from Mymercophaga tridactyla. 1. Praesoma with the proboscis presenting a crown with robust hooks followed by small hooks, a receptacle proboscis, and papillae in the base of the neck; 2. Three different robust hooks in the crown and a one small type in the proboscis; 3. Unsegmented anterior part of the trunk, and lemnisci filiform reaching the middle region of the trunk; 4. Posterior region of adult male showing reproductive organs; 5. Posterior region of adult female showing the uterus, vagina and gonopore subterminal; 6. Egg.
Fig. 12–17 in New morphological and genetic data of Gigantorhynchus echinodiscus (Diesing, 1851) (Acanthocephala: Archiacanthocephala) in the giant anteater Myrmecophaga tridactyla Linnaeus, 1758 (Pilosa: Myrmecophagidae)
Fig. 12–17. Scanning electron micrographs of adult Gigantorhynchus echinodiscus from Mymercophaga tridactyla. 12 and 13. Cylindrical proboscis armed with hooks (Ho) showing a space (Sp) between the two circles of large hooks and small rootless spines, neck (Ne), trunk (Tr), lateral papillae (Pa, arrowhead); 14. Detail of the crown with two circles of large hooks (arrow – 1st row and asterisk – 2nd row); 15. Detail of the lateral papillae; 16 and 17. Posterior end of adult male showing the region without pseudo-segmentation (cross) and a copulatory bursa protruding from the body (CB).
Identifying priority giant anteater (Myrmecophaga tridactyla) populations for conservation in São Paulo State, Brazil
<p>Habitat loss is the main threat to biodiversity conservation worldwide. Some species may be particularly susceptible to the effects of fragmentation and the isolation of populations. The impacts of human activity on wild animal populations may be understood through relationships between individual genetic data and spatial landscape variables, particularly when considering local population dynamics influenced by fragmented habitats. Thus, the objective of this study was to analyze the population structure and genetic diversity of the giant anteater (<i>Myrmecophaga tridactyla</i>) using an individual sampling scheme (ISS) on a regional geographic scale. Data were collected from 41 specimens from twenty different locations in São Paulo State, Brazil, and six polymorphic microsatellite loci were genotyped. Our results indicate that barriers to gene flow exist and have segregated individuals of the farther away areas into two spatially structured clusters. The populations were also found to have high genetic diversity. The experimental sampling approach used herein enabled an analysis of the population dynamics of the giant anteater on a regional scale, as well as the identification of priority populations for genetic resource conservation for this species. The results reflect the need for adequate management plans. The efficacy of the sampling scheme may vary based on the study model used, but we argue that the use of an ISS combined with suitable molecular markers and statistical methods may serve as an important tool for initial analyses of threatened or vulnerable species, particularly in anthropized regions where species populations are small or hard to characterize.</p>
Identifying priority giant anteater (Myrmecophaga tridactyla) populations for conservation in São Paulo State, Brazil
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Figure 4 in Insights into marking behavior of giant anteaters: a camera trap study in the Rupununi savannahs, Guyana
Figure 4: Distribution of marking behaviors in "female with cub," "two adults," and "one adult" social categories, adjusting for survey effort. The Y-axes shows the proportion of marking behaviors recorded per day of camera recording in each month, offering insights into their frequency while accounting for effort variations.
Figure 3 in Insights into marking behavior of giant anteaters: a camera trap study in the Rupununi savannahs, Guyana
Figure 3: Examples of some marking behaviors recorded. Anteater sniffing (A), rubbing (B), climbing (C), and hugging (D) the tree.
Figure 2 in Insights into marking behavior of giant anteaters: a camera trap study in the Rupununi savannahs, Guyana
Figure 2: Histogram showing the number of records for each social category for each behavior identified. (A) Histogram showing number of records for each social category for each behavior identified; with behavior divided into tree marking and non-tree marking behavior. (B) Percentage contribution of each behavior type to the total recorded behaviors within each social category. Note one video can have one or more behaviors recorded.
Figure 5 in Insights into marking behavior of giant anteaters: a camera trap study in the Rupununi savannahs, Guyana
Figure 5: Visualization of PCA Biplot and weighted PCA Biplot, illustrating correlations and influences on social categories. (A) PCA Biplot. (B) Weighted PCA Biplot, in which closeness to an arrow implies greater influence of that arrow on the social categories. Similar arrow directions in both graphs signify positive correlations, while opposite directions imply negative ones. Points' positions relative to arrows denote alignment with principal components.
Figure 3 in New non-invasive photo-identification technique for free-ranging giant anteaters (Myrmecophaga tridactyla) facilitates urgently needed field studies
Figure 3. Example of 4 years of consistent morphologic characteristics of a giant anteater (Myrmecophaga tridactyla). Variations in boldness of the drop-shaped black spot are typical for varying light situations. Uncommon are some white hairs within the black flag, the white 'blob' in the stripe above it and the ear shape. Photo by Lydia Möcklinghoff in the Brazilian Pantanal.
Figure 2 in New non-invasive photo-identification technique for free-ranging giant anteaters (Myrmecophaga tridactyla) facilitates urgently needed field studies
Figure 2. Example of coded photo-ID of four individual giant anteaters (Myrmecophaga tridactyla) sighted in the Brazilian Pantanal. For every picture the date, time and locality of the sighting were recorded. The arrows point to biometric traits that enable discrimination of individuals. These have been categorised in Table 1; stars refer to categories in this matrix (*foreleg, **bracelet, ***stripe, ****scars). As an example, the animals are here only shown from one lateral side. In practice, other photographs, preferably of both lateral sides as well as the front, were considered for the coding of the matrix and the catalogue. Photos by Lydia Möcklinghoff.
Figure 4 in New non-invasive photo-identification technique for free-ranging giant anteaters (Myrmecophaga tridactyla) facilitates urgently needed field studies
Figure 4. Relation between number of individuals classified by volunteers and grade of interobserver agreement relative to the identity assigned to individual giant anteaters by the first author.
Figure 1 in New non-invasive photo-identification technique for free-ranging giant anteaters (Myrmecophaga tridactyla) facilitates urgently needed field studies
Figure 1. Map of the study area, Fazenda Barranco Alto in the Southern Pantanal. The inset indicates its location in Brazil.
Fig. 18 in New morphological and genetic data of Gigantorhynchus echinodiscus (Diesing, 1851) (Acanthocephala: Archiacanthocephala) in the giant anteater Myrmecophaga tridactyla Linnaeus, 1758 (Pilosa: Myrmecophagidae)
Fig. 18. Bayesian inference phylogenetic reconstruction tree of 28S rRNA gene sequences of G. echinodicus in the present study (in red and bold) and archiacanthocephalans sequences from GenBank. The class Palaeacanthocephala, and Eoacanthocephala were added as outgroups. Node values are MP-BP, aLRT, ML-BP, and BPP, respectively.* no support or node not recovered in the respective analysis. Blue – family Oligacanthorhynchidae; green – family Moniliformidae; red – family Gigantorhynchidae.
Figure 1 in Insights into marking behavior of giant anteaters: a camera trap study in the Rupununi savannahs, Guyana
Figure 1: A map showing the location of the study site and the 51 camera trap sites.
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