histochemical and biometric study of the gastrointestinal system of hyla orientalis (bedriaga, 1890) (anura, hylidae). | this study was carried out to assess the localization of hyaluronic acid (ha) and the distribution of glycoproteins in the gastrointestinal system of adult hyla orientalis. histochemical analysis of the gastrointestinal system in h. orientalis showed that mucous content included glycogene and/or oxidable dioles [periodic acid/schiff (pas)+], neutral or acid-rich (pas/ab ph 2.5+), sialic acid residues (koh/pas+) and acid sulphate [aldehyde fuchsin (af)+] glycoproteins. however the mucus content w ... | 2014 | 25578977 |
evolutionary melting pots: a biodiversity hotspot shaped by ring diversifications around the black sea in the eastern tree frog (hyla orientalis). | hotspots of intraspecific genetic diversity, which are of primary importance for the conservation of species, have been associated with glacial refugia, that is areas where species survived the quaternary climatic oscillations. however, the proximate mechanisms generating these hotspots remain an open issue. hotspots may reflect the long-term persistence of large refugial populations; alternatively, they may result from allopatric differentiation between small and isolated populations, that late ... | 2016 | 27220555 |
a tree of tree frogs around the black sea. | speciation, the process by which one species evolves into two or more, is a major focus of ongoing debate, particularly regarding the geographic context in which it occurs. geographic models of speciation tend to fall into discrete categories, typically referred to as allopatric, parapatric and sympatric speciation, according to whether two groups evolve reproductive isolation while geographically isolated, differentiated but connected by gene flow, or completely co-occurring. yet molecular stud ... | 2016 | 27616352 |
total non-consumptive effects of fish on pelobates fuscus and hyla orientalis tadpoles in pond enclosure experiments. | most research on non-consumptive predator effects on amphibian larvae has been conducted in laboratory or mesocosm designs. here, pelobates fuscus and hyla orientalis tadpoles were separately exposed to non-lethal (free-moving, but with tied mouthparts) common carp cyprinus carpio for one week in enclosures placed in a pond densely stocked with fish. tadpoles exposed to nonlethal fish did not differ in mortality, body mass, or, except for deeper tail fin depth in p. fuscus, morphological plastic ... | 2018 | 30520359 |
survey of turkey's endemic amphibians for chytrid fungus batrachochytrium dendrobatidis. | we report a new survey for batrachochytrium dendrobatidis (bd) in turkey. we swabbed 228 individuals of 7 amphibian species (from 5 families) living in 2 locations (26-august national park and the turkish lakes district) in the southwestern anatolian region. the infection intensity of all the samples was determined using quantitative pcr. all 4 amphibian breeding sites and 4 amphibian species in 26-august national park were infected by bd, with the prevalence at each site ranging from 8 to 29%. ... | 2014 | 25266902 |
phylogeography of the middle eastern tree frogs (hyla, hylidae, amphibia) as inferred from nuclear and mitochondrial dna variation, with a description of a new species. | evolutionary relationships of the tree frogs from the middle east and the demographic histories of their populations were studied using a combination of mitochondrial and nuclear genes. hyla savignyi and neighboring populations of h. orientalis (former eastern populations of h. arborea) were the main focus taxa. within h. savignyi, a deep phylogenetic divergence dated about 8.4ma was discovered. southern populations from yemen, jordan, southern syria and extreme north-eastern israel are hereby d ... | 2010 | 20307673 |
maintenance of ancestral sex chromosomes in palearctic tree frogs: direct evidence from hyla orientalis. | contrasting with the situation found in birds and mammals, sex chromosomes are generally homomorphic in poikilothermic vertebrates. this homomorphy was recently shown to result from occasional x-y recombinations (not from turnovers) in several european species of tree frogs (hyla arborea, h. intermedia and h. molleri). because of recombination, however, alleles at sex-linked loci were rarely diagnostic at the population level; support for sex linkage had to rely on multilocus associations, combi ... | 2013 | 23735903 |
timeframe of speciation inferred from secondary contact zones in the european tree frog radiation (hyla arborea group). | hybridization between incipient species is expected to become progressively limited as their genetic divergence increases and reproductive isolation proceeds. amphibian radiations and their secondary contact zones are useful models to infer the timeframes of speciation, but empirical data from natural systems remains extremely scarce. here we follow this approach in the european radiation of tree frogs (hyla arborea group). we investigated a natural hybrid zone between two lineages (hyla arborea ... | 2015 | 26253600 |