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322 results for “poison frogs”
Figure 1 in Advertisement call, tadpole morphology, and other natural history aspects of the threatened poison frog Andinobates daleswansoni (Dendrobatidae)
Figure 1. Image of a calling male of Andinobates dalewansoni in the study area. Individual not collected.
FIGURE 1 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 1. Localities of Andinobates supata sp. nov. and six species of Andinobates used in the phylogenetic analysis (A. cassidyhornae, A. opisthomelas, A. bombetes, A. tolimensis, A. virolinensis and A. dorisswansonae).
FIGURE 4 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 4. Ventral coloration of Andinobates supata sp. nov. compared to the geographically and genetically closest species of Andinobates. A. bombetes (A), A. virolinensis (B), A. tolimensis (C–D), and A. supata sp. nov. (E–H). Dorsolateral coloration of Andinobates supata sp. nov. (I–M) compared to A. tolimensis (N). Photos in B by Gert Benaets, A, E to M by Giovanni Chaves- Portilla, and C, D and N by Taran Grant.
FIGURE 7 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 7. View of the degraded habitat of Andinobates supata sp. nov. Photo: Giovanni Chaves-Portilla.
FIGURE 3 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 3. Body coloration of the two yellow species of Andinobates described to date. Note the postocular dark band in A. tolimensis (above) as opposed to the complete cephalic hood in A. supata sp. nov. (below). Photos by Manuel H. Bernal and Jennifer Del Río, respectively.
FIGURE 6 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 6. Male attracting female to his cave where mating and egg laying presumably occur (A). Male of Andinobates supata sp. nov. carrying three tadpoles presumably to a deposition site such as a bromeliad (B). Photos: Giovanni Chaves-Portilla.
FIGURE 5 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 5. Oscillogram below and sonogram (above) of the advertisement call of Andinobates supata sp. nov. Male size (SVL) = 18.7 mm, body temperature = 18.4° C.
FIGURE 2 in A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia
FIGURE 2. Bayesian mtDNA phylogeny of 11 Andinobates species, based on 16S and Cytb genes, with Ranitomeya ventrimaculata used as outgroup. Nodal support is represented on internodes as Bayesian posterior probability/ML bootstrap. Values for nodes with support below 0.9/0.7 are not shown. Support values for some intraspecific nodes are also not shown to improve visualization.
The influence of ultraviolet reflectance differs between conspicuous aposematic signals in neotropical butterflies and poison frogs
<p>Warning signals are often characterized by highly contrasting, distinctive and memorable colors. Both chromatic (hue) and achromatic (brightness) contrast contribute to signal efficacy, making longwave colored signals (red and yellow) that generate both chromatic and achromatic contrast common. Shortwave colors (blue and ultraviolet) do not contribute to luminance perception, yet are also common in warning signals. The presence of UV aposematic signals is paradoxical as UV perception is not universal, and evidence for its utility is at best mixed. We used visual modeling to quantify how UV affects signal contrast in aposematic butterflies and frogs. We found that UV only appreciably affected visual contrast in the butterflies. As the butterflies, but not the frogs, have UV-sensitive vision these results support the notion that UV reflectance is associated with intraspecific communication, but appears to be non-functional in frogs. Consequently, we should be careful when assigning a selection-based benefit from UV reflectance.</p>
FIG. 3 in Intraspecific Call Variation in the Mimic Poison Frog Ranitomeya imitator
FIG. 3.—Regressions between (a) elevation and average male mass, (b) average male mass and note length residuals, (c) average male mass and pulse rate residuals, and (d) average male mass and dominant frequency residuals of Ranitomeŋa imitator. Individual dots represent population averages.
FIG. 2 in Intraspecific Call Variation in the Mimic Poison Frog Ranitomeya imitator
FIG. 2.—Clines in advertisement call parameters across three mimetic transition zones of Ranitomeŋa imitator. (a) Banded-striped transition zone, (b) spotted-striped transition zone, (c) striped-varadero transition zone. In all panels, call parameter values for individual R. imitator (represented by dots) are plotted along the sampling transect (x-axis). For all panels, the fit line represents the best-supported model according to the AICc (see Table 2).
FIG. 1 in Intraspecific Call Variation in the Mimic Poison Frog Ranitomeya imitator
FIG. 1.—Advertisement calls of Ranitomeŋa imitator, showing waveforms (above) and spectrograms (below). (a) varadero morph, recording locality Varadero Forest 1, recorded at 27°C (note length = 0.983 s, pulse rate = 37.6 pulses/s, dominant frequency = 5059 Hz); (b) striped morph, recording locality Varadero South Bank, recorded at 26°C (note length = 0.692 s, pulse rate = 34.7 pulses/s, dominant frequency = 5668 Hz); (c) banded morph, recording locality Sauce, recorded at 26°C (note length = 1.044 s, pulse rate = 28.7 pulses/s, dominant frequency = 5003 Hz); (d) spotted morph, recording locality San Jose, recorded at 22°C (note length = 0.777 s, pulse rate = 33.5 pulses/s, dominant frequency = 5194 Hz). The nearly ubiquitous noise occurring at 7 kHz in all recordings is background noise caused by calling insects.
Data from: Ecological and social drivers of neighbor recognition and the dear enemy effect in a poison frog
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Data from: Ant and mite diversity drives toxin variation in the Little Devil poison frog
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Data from: Distance-dependent defensive coloration in the poison frog Dendrobates tinctorius, Dendrobatidae
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Hormonal and neural correlates of care in active versus observing poison frog parents
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Data from: Not everything is black and white: color and behavioral variation reveal a continuum between cryptic and aposematic strategies in a polymorphic poison frog
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The influence of ultraviolet reflectance differs between conspicuous aposematic signals in neotropical butterflies and poison frogs
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Data from: Multivariate species boundaries and conservation of harlequin poison frogs
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The Influence of Environmental Variation on the Genetic Structure of a Poison Frog Distributed Across Continuous Amazonian Rainforest
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