| geographic determinants of gene flow in two sister species of tropical andean frogs. | complex interactions between topographic heterogeneity, climatic and environmental gradients, and thermal niche conservatism are commonly assumed to indicate the degree of biotic diversification in montane regions. our aim was to investigate factors that disrupt gene flow between populations and to determine if there is evidence of downslope asymmetric migration in highland frogs with wide elevational ranges and thermal niches. we determined the role of putative impediments to gene flow (as meas ... | 2014 | 24336965 |
| a new species of the highland frog genus holoaden (amphibia, strabomantidae) from cloud forests of southeastern brazil. | a new species of the genus holoaden is described from the atlantic forest of the state of são paulo, brazil, being restricted to primary or slightly disturbed high altitude cloud forests along the northeastern portion of the serra do mar. the typelocality is determined as estação ecológica de bananal, in the municipality of bananal, state of são paulo, brazil. the new species is characterized by its moderate body size (female 42.6-44.2 mm svl; male 37.2-38.5 mm svl) with long and slender limbs, ... | 2013 | 24614937 |
| amphibian chytrid fungus batrachochytrium dendrobatidis in cusuco national park, honduras. | amphibian population declines in honduras have long been attributed to habitat degradation and pollution, but an increasing number of declines are now being observed from within the boundaries of national parks in pristine montane environments. the amphibian chytrid fungus batrachochytrium dendrobatidis has been implicated in these declines and was recently documented in honduras from samples collected in pico bonito national park in 2003. this report now confirms cusuco national park, a protect ... | 2010 | 21268988 |
| studies on pregnancy test by using male rana maculata. | | 1956 | 13357855 |
| combining ultraconserved elements and mtdna data to uncover lineage diversity in a mexican highland frog (sarcohyla; hylidae). | molecular studies have uncovered significant diversity in the mexican highlands, leading to the description of many new endemic species. dna approaches to this kind of species discovery have included both mitochondrial dna (mtdna) sequencing and multilocus genomic methods. while these marker types have often been pitted against one another, there are benefits to deploying them together, as linked mtdna data can provide the bridge between uncovering lineages through rigorous multilocus genomic an ... | 2018 | 30581665 |
| treatment of highland frogs from the two-legged stage with homeopathically prepared thyroxin (10-11 - 10-21). | the influence of moderately diluted, agitated, i.e., homeopathically prepared, thyroxin solutions (10-11 - 10-21, final concentration in the basin water 0.6 10-15 - 0.6 10-25 parts by weight after the first application) on metamorphosis in highland rana temporaria from the two-legged stage was studied. in accordance with the homeopathic idea of effects of specially prepared dilutions being inverse to those of their mother substances, animals were treated either with thyroxin 10-11 - 10-21 or ana ... | 2008 | 18454254 |
| pretreatment with thyroxin 10(-8) and the effect of homeopathically prepared thyroxin 10(-30) on highland frogs--a multi-researcher study. | studies performed in 5 laboratories have shown that homeopathically prepared highly diluted thyroxin (10(-30)=30x) slowed down metamorphosis of highland amphibians. metamorphosis of lowland amphibians, however, could be slowed down by a low dilution of thyroxin (10(-8)=8x) if animals had been artificially pretreated with thyroxin. | 2007 | 18219210 |
| the effect of homeopathically prepared thyroxine on highland frogs: influence of electromagnetic fields. | previous experiments show that amphibian larvae are responsive to homeopathically prepared thyroxine. | 2008 | 18194759 |