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109 results for “Tropidurus”
FIGURE 10 in A new Tropidurus (Tropiduridae) from the semiarid Brazilian Caatinga: evidence for conflicting signal between mitochondrial and nuclear loci affecting the phylogenetic reconstruction of South American collared lizards
FIGURE 10. Scatterplot of PC1 and PC2 generated by the principal component analyses and LD1 and LD2 generated by the size-free discriminant analyses performed on the log-transformed morphometric variables of Tropidurus. Tropidurus sertanejo, n. sp., highlighted in dark gray. See table 5 for corresponding summary statistics.
Fig. 47. Tropidurus panstictus, new species. A in Herpetofauna Of The Yutajé -Corocoro Massif, Venezuela: Second Report From The Robert G. Goelet American Museum-Terramar Expedition To The Northwestern Tepuis
Fig. 47. Tropidurus panstictus, new species. A juvenile paratopotype (AMNH 147045, 40 mm SVL). Compare with color pattern of adults (figs. 45, 46).
Figure 4 in Microhabitat selection of the poorly known lizard Tropidurus lagunablanca (Squamata: Tropiduridae) in the Pantanal, Brazil
Figure 4. Result of the mixed Conditional Logistic Regression model for the presence of Tropidurus lagunablanca as a function of predictor variables: substrate temperature, in ℃ (A) and diameter at breast height (DBH, in cm) of the trees (B). The solid line represents the probability predicted by the model and the dashed lines represent the respective confidence intervals. The circles are the observed values measured in the points of presence (used microhabitats) and availability (the four respective unused microhabitats paired to each used one). As we included the ID of the observation (one ID for one used site, plus the correspondent four available microhabitats) in the model as a random factor, we colored the circles in the plot by ID, so one can have an idea of what used value corresponds to each available value. Please note that the location of the circles was vertically jittered to enhance visualization, but all points of availability correspond to the exact same probability of 0 and all points of presence correspond to the exact same probability of 1.
Figure 3 in Microhabitat selection of the poorly known lizard Tropidurus lagunablanca (Squamata: Tropiduridae) in the Pantanal, Brazil
Figure 3. Substrate temperatures (Ts) of the sites where Tropidurus lagunablanca were observed along daily activity period (local time) at the Base de Estudos do Pantanal, Corumbá, Mato Grosso do Sul, Brazil.
Figure 1 in Microhabitat selection of the poorly known lizard Tropidurus lagunablanca (Squamata: Tropiduridae) in the Pantanal, Brazil
Figure 1. Adult individual of Tropidurus lagunablanca, Base de Estudos do Pantanal, Corumbá, Mato Grosso do Sul, Brazil.
Figure 2 in Microhabitat selection of the poorly known lizard Tropidurus lagunablanca (Squamata: Tropiduridae) in the Pantanal, Brazil
Figure 2. Hypotheses on the microhabitat selection of Tropidurus lagunablanca in Pantanal, Brazil. H1: T. lagunablanca individuals would choose trees with thermally suitable conditions for thermoregulation; H2:T. lagunablanca individuals would choose thicker trees, which offer more trophic and shelter resources.
Corticosterone treatment results in fat deposition and body mass maintenance without effects on feeding behaviour or immunity in female lizards (Tropidurus catalanensis)
<p>In different life history stages, animals must maintain homeostasis through predictable, unpredictable and/or challenging events. Glucocorticoids (GC), hormones released in response to hypothalamus-pituitary-adrenal/interrenal (HPA/HPI) axis activation, promote various behavioural and physiological adjustments on a daily manner; and in order to restore balance, after facing stressors. When GC are elevated for an extended period and in high concentrations, characterizing a chronic exposure, it can lead to deleterious effects on animals’ physiology, such as accumulation of fat bodies, changes in feeding behaviour and suppression of immune function. We aim to elucidate the effects of chronic corticosterone exposure and body condition index (BI) in fat deposition, feeding behaviour and immune function in <em>Tropidurus catalanensis</em>’ females. Thirty animals were divided in three groups: 1. Control (no experimental procedure was performed); 2. Empty Implant (animals surgically received an empty silastic tube); and 3. CORT Implant (animals surgically received one silastic tube filled with CORT). Blood samples were collected throughout the experiment to assess CORT plasma levels, total and differential leukocyte count, bacterial killing ability (BKA), and hemagglutination titer. An immune challenge using phytohemagglutinin (PHA) was conducted to measure innate and adaptive immune response. Feeding behaviour and fat bodies were also evaluated. After implantation, CORT treated animals maintained a stable body mass through weeks of captivity, while Control and Empty Implant groups displayed weight loss. In the CORT treated animals, there was also a positive relation between BI and fat bodies, and higher fat bodies deposition when compared to groups 1 and 2. No effects of CORT treatment were observed on immune response or feeding behaviour.</p>
Data from: Effects of food intake and hydration state on behavioral thermoregulation and locomotor activity in the tropidurid lizard Tropidurus catalanensis
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Data from: Metropolitan lizards? Urbanization gradient and the density of lagartixas (Tropidurus hispidus) in a tropical city
Urbanization, with its cohort of environmental stressors, has a dramatic effect on wildlife, causing loss of biodiversity and decline in population abundance customarily associated with increasing levels of impervious surface and fragmentation of native habitats. Some studies suggest that faunal species from open habitats, and with higher abundance in natural environments, seem more likely to tolerate and live in urban environments. Here I evaluate how the level of urbanization affects lagartixas (Tropidurus hispidus) one of the most common lizards found in open vegetation ecosystems in NE Brazil. I surveyed a total of 47 transects across sites that differed in proportion of impervious surface (high, mild, peri-urban and rural). I also collected specific biotic (herbaceous cover, tree and arthropod abundance) and abiotic (amount of shelters and impervious surfaces) factors that could affect lagartixas abundance. Ants were the most common arthropod both in the rural and urban environment. Lagartixas thrive in urban environments and trees and shelter were key predictors of their abundance. Lagartixas show a clear association with use of artificial structures. The low densities of lagartixas in rural areas and higher density in urbanized areas suggests that they colonized urban areas due to the hard surfaces and they probably are not exploiting a novel habitat, but somewhat responding to conditions resembling those in which they evolved. Finally, lagartixas are extremely common in tropical cities, they have a suite of features that are associated with selective pressures in cities and they might play a key functional role in urban ecosystems making this lizard an excellent system for the study of ecology and adaptation to the urban environments.
Data from: In the shadows: phylogenomics and coalescent species delimitation unveil cryptic diversity in a Cerrado endemic lizard (Squamata: Tropidurus)
The recognition of cryptic diversity within geographically widespread species is gradually becoming a trend in the highly speciose Neotropical biomes. The statistical methods to recognise such cryptic lineages are rapidly advancing, but have rarely been applied to genomic-scale datasets. Herein, we used phylogenomic data to investigate phylogenetic history and cryptic diversity within Tropidurus itambere, a lizard endemic to the Cerrado biodiversity hotspot. We applied a series of phylogenetic methods to reconstruct evolutionary relationships and a coalescent Bayesian species delimitation approach (BPP) to clarify species limits. The BPP results suggest that the widespread nominal taxon comprises a complex of 5 highly supported and geographically structured cryptic species. We highlight and discuss the different topological patterns recovered by concatenated and coalescent species tree methods for these closely related lineages. Finally, we suggest that the existence of cryptic lineages in the Cerrado is much more common than traditionally thought, highlighting the value of using NGS data and coalescent techniques to investigate patterns of species diversity.
FIGURE 20 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 20. Tropidurus torquatus from Brasília National Park, Brasília, Distrito Federal, Central Brazil (not collected).
FIGURE 19 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 19. Tropidurus torquatus from Comendador Levy Gasparian, mountain ranges of Rio de Janeiro, near to the border with Minas Gerais. Adult male (UFRGS 5829; SVL 126.6 mm). Photo by Rafael Balestrin.
FIGURE 18 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 18. Tropidurus torquatus from Arraial do Cabo, north coast of Rio de Janeiro. Adult male (UFRGS 5756; SVL 70 mm).
FIGURE 17 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 17. Lateral view of head of Tropidurus catalanensis (UFRGS 5324) from São Francisco de Assis, Rio Grande do Sul, Brazil. Freshly killed subadult male (head length 21.4 mm).
FIGURE 16 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 16. Tropidurus catalanensis from São Francisco de Assis, Rio Grande do Sul. Adult male (not collected).
FIGURE 15 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 15. Tropidurus catalanensis from Campos Novos, Santa Catarina, near the Uruguay riverbank (not collected).
FIGURE 14 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 14. Tropidurus catalanensis from Iguaçu National Park, Foz do Iguaçu, Paraná, Brazil (not collected). Note the yellow coloration of chin, including infra and supralabials.
FIGURE 13 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 13. Dorsal (left) and ventral (right) views of the holotype (MNHN 3489; SVL 114.8 mm) of Tropidurus catalanensis.
FIGURE 2 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 2. Chest and chin coloration in adult male specimens of the Tropidurus torquatus complex: A) Arraial do Cabo, North coast of Rio de Janeiro State (UFRGS 5756; SVL 70 mm); B) Imbituba, south coast of Santa Catarina (UFRGS 5302; SVL 116.6 mm); C) Comendador Levy Gasparian, moutain ranges of Rio de Janeiro (UFRGS 5832; SVL 121.4 mm); D) São Francisco de Assis, southwestern Rio Grande do Sul (UFRGS 5324; SVL 95 mm); E) Aratiba, northern Rio Grande do Sul (UFRGS 5579; SVL 107.9 mm); F) Ipuaçu, western Santa Catarina (UFRGS 5452; SVL 98.6 mm).
FIGURE 12 in A new microendemic species of Tropidurus (Squamata: Tropiduridae) from southern Brazil and revalidation of Tropidurus catalanensis Gudynas & Skuk, 1983
FIGURE 12. Rocky seashore at Praia da Vila, Imbituba, Brazil. Arrow indicates the exact place where most of the type series was collected, including the holotype.
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