| integrative demographic study of the iberian painted frog (discoglossus galganoi): inter-annual variation in the effective to census population size ratio, with insights on mating system and breeding success. | in the face of worldwide amphibian declines, integrative studies combining individual-based information and genetic data represent a powerful approach to produce robust, reliable, and comparable assessments of demographic dynamics. the iberian painted frog (discoglossus galganoi) is endemic to spain and portugal and shows decreasing population trends across its range, but few studies have attempted to estimate census sizes or assess genetic diversity in wild populations, and little is known abou ... | 2020 | 32333629 |
| effects of induced variation in anuran larval development on postmetamorphic energy reserves and locomotion. | anuran larvae exhibit high levels of phenotypic plasticity in growth and developmental rates in response to variation in temperature and food availability. we tested the hypothesis that alteration of developmental pathways during the aquatic larval stage should affect the postmetamorphic performance of the iberian painted frog (discoglossus galganoi). we exposed tadpoles to different temperatures and food types (animal- vs. plant-based diets) to induce variation in the length of the larval perio ... | 2002 | 28547685 |
| influence of developmental stage on sensitivity to ammonium nitrate of aquatic stages of amphibians. | in static renewal experiments, we studied how developmental stage influences the effect of ammonium nitrate on embryonic and larval stages of anuran amphibians. the observed lethal effects caused by ammonium nitrate increased with both concentration and duration of exposure. significant differences were observed in sensitivity to ammonium nitrate as a function of developmental stage in discoglossus galganoi, pelobates cultripes, and bufo calamita. in d. galganoi and p. cultripes, younger individ ... | 2006 | 16494230 |
| delayed effects of larval predation risk and food quality on anuran juvenile performance. | metamorphosis can disrupt the correlation structure between juvenile and adult traits, thus allowing relatively independent evolution in contrasting environments. we used a multiple experimental approach to investigate how diet quality and larval predation risk affected the rates of growth and development in painted frogs (discoglossus galganoi), and how these changes influence post-metamorphic performance. a high-energy diet entailed growth advantages only if predation risk did not constrain en ... | 2006 | 16780510 |
| influence of ammonium nitrate on larval anti-predatory responses of two amphibian species. | sublethal effects of toxicants can upset normal behavioural responses to predators, leading to increased predation. for example, sensory capabilities can be impaired by toxicants, leading to difficulty in detecting predators or other threats. alteration of locomotor abilities by pollutants can also explain the difficulty of tadpoles to escape from predators. here we assess the effects of a nitrogenous fertilizer on the response to predators shown by anuran tadpoles. in a first experiment, we chr ... | 2010 | 20493565 |
| warm vegetarians? heat waves and diet shifts in tadpoles. | temperature can play an important role in determining the feeding preferences of ectotherms. in light of the warmer temperatures arising with the current climatic changes, omnivorous ectotherms may perform diet shifts toward higher herbivory to optimize energetic intake. such diet shifts may also occur during heat waves, which are projected to become more frequent, intense, and longer lasting in the future. here, we investigated how heat waves of different duration affect feeding preferences in ... | 2016 | 27870032 |
| phylogenetic relationships of discoglossid frogs (amphibia:anura:discoglossidae) based on complete mitochondrial genomes and nuclear genes. | the complete nucleotide sequence of the mitochondrial (mt) genome was determined for three species of discoglossid frogs (amphibia:anura:discoglossidae), representing three of the four recognized genera: alytes obstetricans, bombina orientalis, and discoglossus galganoi. the organization and size of these newly determined mt genomes are similar to those previously reported for other vertebrates. phylogenetic analyses (maximum likelihood, bayesian inference, minimum evolution, and maximum parsimo ... | 2004 | 15588590 |
| impact of ammonium nitrate on growth and survival of six european amphibians. | we conducted static experiments to assess the effects of ammonium nitrate fertilizer on embryos and larvae of six european amphibians: sharp-ribbed salamander (pleurodeles waltl), iberian painted frog (discoglossus galganoi), western spadefoot toad (pelobates cultripes), common toad (bufo bufo), natterjack toad (bufo calamita), and common tree frog (hyla arborea). embryos were exposed to different and environmentally relevant concentrations of ammonium nitrate (0 to 200 mg no(3)(-)/l) for 15 day ... | 2004 | 15386149 |