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22 results for “Hyla arborea”
Fig. 1 in Choosy Outsiders? Satellite Males Associate With Sexy Hosts In The European Tree Frog Hyla Arborea
Fig. 1. Box plots for snout-urostyle length of sampled males of Hyla arborea, classified as satellites, callers or hosts. Boxes represent standard error of mean and whiskers represent standard deviation. Small squares represent mean
Figure 3 in Colour variations in the European tree frog, Hyla arborea (Linnaeus, 1758), from two small adjacent ponds in the Vojvodina province, Serbia
Figure 3. Two green colour variations: the typical, bright green a) and paler, yellowish b). Photos: Aleksandar Simović.
Figure 1 in Colour variations in the European tree frog, Hyla arborea (Linnaeus, 1758), from two small adjacent ponds in the Vojvodina province, Serbia
Figure 1. Two ponds where the frogs were observed: a) the larger one, near a settlement, overgrown with reeds; b) small, shallow pond with open water. Photos: Sonja Đorđević.
figure 3 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 3 Variation in body pigmentation between different background coloration treatments during ethe xperimental time in H. arborea tadpoles. dl – dark-light treatment; d – dark treatment; dd – darkdark treatment; ld – light-dark treatment; l – light treatment; ll – light-light treatment
figure 4 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 4 The tadpole body coloration by treatment: day 0 – the start of the experiment, average pigmentation 69% of dark pixels, no treatment groups; day 20 of the experiment (day 20) – two treatment groups, Dark and Light, average pigmentation d – 93% and l – 62% of dark pixels; day 36 – the end of the experiment (day 36) – four treatments, dd – dark-dark treatment, ld – light-dark treatment, dl – dark-light treatment, ll – light-light treatment, average pigmentation dd – 90%, dl – 60%, ld – 91%, ll – 70% of dark pixels.
figure 1 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 1 Experimental design of the study. n – sample size; gs – developmental stage by Gosner, 1960
figure 6 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 6 Mean body shape of each treatment in two time points (after 20 days of the experiment – two treatments, and after 36 days/at the end of the experiment – four treatments) visualized in the canonical variate space (cv1 vs. cv 2). 20 d – dark treatment after 20 days; 20 l – light treatment after 20 days; 36 dd – dark-dark treatment after 36 days; 36 dl – dark-light treatment after 36 days; 36 ll – light-light treatment after 36 days; 36 ld – light-dark treatment after 36 days.
figure 8 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 8 How many times on average (with standard error) H. arborea tadpoles from different treatments were detected in the dark background: without predator chemical cues (black bars), with predator chemical cues (grey bars). dl – dark-light treatment; dd – dark-dark treatment; ld – light-dark treatment; ll – light-light treatment.
figure 2 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 2 Position of landmarks (l) and semi-landmarks (sl): l 1 – the tip of the snout, l 2 & 3 – dorsal and ventral points of anterior eye edge, l 4 – the intersection of head-body and dorsal edge of the tail fin, l 7 – the intersection of head-body and the ventral edge of the tail muscle, sl 5, 6 & 8 – the dorsal side of the tail fin, the dorsal side of the tail muscle, the ventral side of the tail muscle, the ventral side of the tail fin, all in the same vertical line as l 7, sl 9–12 – the dorsal side of the tail fin, the dorsal side of the tail muscle, the ventral side of the tail muscle, the ventral side of the tail fin ¼ the distance between l 7 and l 21, sl 13–16 – the dorsal side of the tail fin, the dorsal side of the tail muscle, the ventral side of the tail muscle, the ventral side of the tail fin ½ the distance between l 7 and l 21, sl 17–20 – the dorsal side of the tail fin, the dorsal side of the tail muscle, the ventral side of the tail muscle, the ventral side of the tail fin ¾ the distance between l 7 and l 21, l 21 – the tip of the tail
figure 7 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 7 Ontogenetic trajectories of each treatment in two time points (after 20 days of the experiment – two treatments, and after 36 days/at the end of the experiment – four treatments) visualized in the space of principal components (pc1 vs. pc2). 20 d – dark treatment after 20 days; 20 l – light treatment after 20 days; 36 dd – dark-dark treatment after 36 days; 36 dl – dark-light treatment after 36 days; 36 ll – light-light treatment after 36 days; 36 ld – light-dark treatment after 36 days.
figure 5 in EFfects of background color on pigmentation, morphological traits, and behavior in the European tree frog (Hyla arborea, Hylidae, Anura) tadpoles
figure 5 Body length variation between different background coloration treatments during experimental time in H. arborea tadpoles. dl – dark-light treatment; d – dark treatment; dd – dark-dark treatment; ld – light-dark treatment; l – light treatment; ll – light-light treatment.
Figure 2 in Colour variations in the European tree frog, Hyla arborea (Linnaeus, 1758), from two small adjacent ponds in the Vojvodina province, Serbia
Figure 2: Example of high density of Tree frogs on the reeds. Photo: Aleksandar Simović.
Figure 5 in Colour variations in the European tree frog, Hyla arborea (Linnaeus, 1758), from two small adjacent ponds in the Vojvodina province, Serbia
Figure 5. Almost completely black Hyla arborea. Photos: Aleksandar Simović and Sonja Đorđević.
Figure 4 in Colour variations in the European tree frog, Hyla arborea (Linnaeus, 1758), from two small adjacent ponds in the Vojvodina province, Serbia
Figure 4. Two grayish individuals. Photos: Aleksandar Simović and Sonja Đorđević.
Data from: Conservation phylogeography: does historical diversity contribute to regional vulnerability in European tree frogs (Hyla arborea)
Documenting and preserving the genetic diversity of populations, which conditions their long-term survival, has become a major issue in conservation biology. The loss of diversity often documented in declining populations is usually assumed to result from human disturbances; however, historical biogeographic events, otherwise known to strongly impact diversity, are rarely considered in this context. We apply a multi-locus phylogeographic study to investigate the late-Quaternary history of a tree frog (Hyla arborea) with declining populations in the northern and western part of its distribution range. Mitochondrial and nuclear polymorphisms reveal high genetic diversity in the Balkan Peninsula, with a spatial structure molded by the last glaciations. While two of the main refugial lineages remained limited to the Balkans (Adriatic coast, southern Balkans), a third one expanded to recolonize Northern and Western Europe, loosing much of its diversity in the process. Our findings show that mobile and a priori homogeneous taxa may also display substructure within glacial refugia ("refugia within refugia"), and emphasize the importance of the Balkans as a major European biodiversity center. Moreover, the distribution of diversity roughly coincides with regional conservation situations, consistent with the idea that historically impoverished genetic diversity may interact with anthropogenic disturbances, and increase the vulnerability of populations. Phylogeographic models seem important to fully appreciate the risks of local declines and inform conservation strategies.
Data from: First-generation linkage map for the European tree frog (Hyla arborea) with utility in congeneric species
Background: Western Palearctic tree frogs (Hyla arborea group) represent a strong potential for evolutionary and conservation genetic research, so far underexploited due to limited molecular resources. New microsatellite markers have recently been developed for Hyla arborea, with high cross-species utility across the entire circum-Mediterranean radiation. Here we conduct sibship analyses to map available markers for use in future population genetic applications. Findings: We characterized eight linkage groups, including one sex-linked, all showing drastically reduced recombination in males compared to females, as previously documented in this species. Mapping of the new 15 markers to the ~200 My diverged Xenopus tropicalis genome suggests a generally conserved synteny with only one confirmed major chromosome rearrangement. Conclusions: The new microsatellites are representative of several chromosomes of H. arborea that are likely to be conserved across closely-related species. Our linkage map provides an important resource for genetic research in European Hylids, notably for studies of speciation, genome evolution and conservation.
Data from: First-generation linkage map for the European tree frog (Hyla arborea) with utility in congeneric species
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Data from: Conservation phylogeography: does historical diversity contribute to regional vulnerability in European tree frogs (Hyla arborea)
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Data from: Sex-chromosome differentiation parallels post-glacial range expansion in European tree frogs (Hyla arborea).
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Data from: Within- and among-population impact of genetic erosion on adult fitness-related traits in the European tree frog Hyla arborea
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