“…BACKGROUND: Chytridiomycosis is a fungal disease linked to local and global extinctions of amphibians. Susceptibility to chytridiomycosis varies greatly between amphibian species, but little is known about between- and within-population variability. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…However, in organisms as diverse as fly, fish, or amphibian, the ectoderm-mesoderm boundary not only keeps these germ layers separated, but the ectoderm also serves as substratum for mesoderm migration, and the boundary must be compatible with repeated cell attachment and detachment. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…We capitalized on the variation in aggregation behavior of Fowler's toads (Anaxyrus [ = Bufo] fowleri) and grey treefrogs (Hyla versicolor) tadpoles and tested for differences in transmission of Batrachochytrium dendrobatidis (Bd) and host-specific fitness consequences (i.e., life history traits that imply fitness) of infection in single-species amphibian mesocosms. On average, A. fowleri mesocosms supported higher Bd prevalences and infection intensities relative to H. versicolor mesocosms. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Two recent papers showing that B lymphocyte-induced maturation protein 1 (Blimp1) regulates postnatal epithelial stem cell reprogramming during mouse intestinal maturation support the model that adult intestinal stem cells are developed during postembryonic development in mammals, in a TH-dependent process similar to intestinal remodeling during amphibian metamorphosis. Since the formation of the adult intestine in both mammals and amphibians is closely associated with the adaptation from aquatic to terrestrial life during the peak of endogenous TH levels, the molecular mechanisms by which the adult stem cells are developed are likely evolutionally conserved.…”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Dorsal–ventral specification in the amphibian embryo is controlled by β-catenin, whose activation in all dorsal cells is dependent on maternal Wnt11. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Although digit loss has been documented among distantly related species of salamanders, it is relatively uncommon in this amphibian order. For example, reduction from five to four toes appears to have evolved just three times in the morphologically and ecologically diverse family Plethodontidae. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…We took an experimental approach to test this assumption, estimating the effects of nonnative Phragmites australis on a native amphibian. METHODOLOGY/PRINCIPAL FINDINGS: Concurrent common garden and reciprocal transplant field experiments revealed consistently strong positive influences of Phragmites on Rana catesbeiana (North American bullfrog) larval performance. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…BACKGROUND: Microsatellite loci are widely used in population and conservation genetic studies of amphibians, but the availability of such markers for tropical and subtropical taxa is currently very limited. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…The simulated data agreed qualitatively, and quantitatively when experimental data are available, with data obtained on amphibian or on mammalian myocardium. In addition, the data obtained in these simulations improve our understanding of the mechanism(s) whereby the heart muscle adapts itself to increased distension (increased preload) or to impeded systolic contraction (increased afterload). …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Amphibians have undergone dramatic declines and extinctions worldwide. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Batrachochytrium dendrobatidis is considered a main driver of the worldwide declines and extinctions of amphibian populations. Nonetheless, fundamental questions about its epidemiology, including whether it acts mainly as a “lone killer” or in conjunction with other factors, remain largely open. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…In addition, environmental temperature decreases with altitude, and the amphibian fauna changes. Therefore, we studied the relationship between the embryonic thermal tolerances of twelve species of anurans and the temperatures of their microhabitat along an altitudinal gradient from 430 m to 2600 m. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Understanding the molecular mechanisms that promote successful tissue regeneration is critical for continued advancements in regenerative medicine. Vertebrate amphibian tadpoles of the species Xenopus laevis and Xenopus tropicalis have remarkable abilities to regenerate their tails following amputation (1, 2), via the coordinated activity of numerous growth factor signaling pathways, including the Wnt, Fgf, BMP, notch, and TGFβ pathways (3-6). …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Using microsatellite markers, we compared the genetic structure of populations of an amphibian species, the midwife toad (Alytes obstetricans), in four Swiss regions where the species has suffered variable levels of subpopulation extirpation. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…We assess the diversity of Ptychadena species in Rwanda based on re-examination of voucher specimens in museum collections and our own data from recent assessment of the species composition of amphibian communities in Rwanda. We recognize five species which we allocate to the following available names: P. anchietae, P. chrysogaster, P. nilotica, P. porosissima, and P. uzungwensis. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…We applied our approach to a taxon-rich habitat that included 78 birds, 8 insect species and 1 amphibian. This dataset constituted the Multi-label Bird Species Classification Challenge-NIPS 2013 where the proposed approach achieved an average accuracy of 91.25% on unseen data.…”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…The results of the present study demonstrate a specific pattern of NADPH-d labeling in the selected amphibian model throughout the spinal cord length as NADPH-d-producing cells and fibers were present in almost all segments of the spinal cord of the salamander investigated. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…The Chinese brown frog (Rana dybowskii) is a special amphibian with one unique physiological phenomenon, which is that its oviduct expands prior to hibernation, instead of during the breeding period. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Multiple factors are thought to cause limb abnormalities in amphibian populations by altering processes of limb development and regeneration. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso

“…Insect care evolution most closely resembled amphibian care in general trajectory. Integrating these findings with the wealth of life history and ecological data in insects will allow testing of a rich vein of existing hypotheses.…”
Enlace del recurso
Enlace del recurso
Enlace del recurso