FrogsAmphibiansBufoArvalisSpeciesCommon-frog populaFrogRanavirusDifferentiationZootoca1990Amphibian populationSkin microbiomeGeneticDynamicsFemalesEcosystemsTraitsEuropeanToxicantsHaplotypesAlleleMortalityImpactsAquaticTadpolesMethodsGradientDifferencesStructureResearchersExposureFoundClimateFactorsEstimateFishGermanyNatural
Frogs13
- Adult frogs (Rana temporaria) were phenotypically sexed and DNA was collected from buccal swabs. (datadryad.org)
- Frog Virus 3 (FV3), Bohle iridovirus, Ambystoma tigrinum virus, and a possible species Rana catesbeiana virus Z. In Europe, FV3 has been identified in several outbreaks of ranavirosis, characterized by mass deaths, notably in green frogs ( Pelophylax sp. (cdc.gov)
- Scientists who want to find out which frog populations are more likely to contract the deadly ranavirus, which affects amphibians and reptiles globally, recently turned to frogs' skin. (wildlife.org)
- Whether a population of frogs becomes diseased might depend on the species of bacteria living on their skin," said Dr Lewis Campbell. (frontiersin.org)
- The scientists tested the skin bacteria of more than 200 wild adult European common frogs (Rana temporaria) from ten populations. (frontiersin.org)
- They found that the microbiome of individual frogs is usually most similar to that of others in the same population (those living in the same geographical area), but that populations with the same disease history were more similar to each other than to populations of the opposite disease history. (frontiersin.org)
- Three additional SVs enriched on the skin of frogs from disease-free populations were characterized as detector species. (frontiersin.org)
- Ranavirus ecology in common frogs (Rana Temporaria) from United Kingdom: transmission dynamics, alternate hosts and host-strain interactions. (qmul.ac.uk)
- Ranavirus(es) were introduced to the UK in the late 1980s and have been associated with mass mortality events in common frogs (Rana temporaria) in south east England. (qmul.ac.uk)
- To test the two different hypotheses for the transmission/maintenance of ranavirus(es) in North American amphibians, investigations into the life history stages of common frogs (Rana temporaria) affected by the ranavirus were undertaken. (qmul.ac.uk)
- A mathematical model was developed to investigate if the ranavirus could be maintained in populations of common frogs when only adult-to-adult horizontal transmission of the ranavirus occurred. (qmul.ac.uk)
- Berven K. A. (1988), «Factors variation in reproductive traits within a population of wood frogs ( Rana sylvatica )», Copeia , 1988 , 605 - 615. (folium.ru)
- Here we describe genetic diversity at three AMP loci (Temporin, Brevinin and Palustrin) in two ranid frogs (Rana arvalis and R. temporaria) along a 2000 km latitudinal gradient. (scilifelab.se)
Amphibians3
- Drift fences are frequently used to sample amphibians for population studies. (researchgate.net)
- In some regions, amphibians have been observed to be the most impacted vertebrates, by road networks (Glista, DeVault & DeWoody 2008 ), yet more work is needed to fully assess impacts on populations and roadkill mitigation (Beebee 2013 ). (koedoe.co.za)
- Given that numerous amphibians are suffering population declines, it is becoming increasingly important to examine the relationship between disease and environmental disturbance. (concordia.ca)
Bufo5
- Wechselkröten ( Bufo viridis ) mit Rückenband aus einer Population im Rhein-Main-Gebiet. (salamandra-journal.com)
- R. FLINDT und H. HEMMER (1968): Beobachtungen zur Dynamik einer Population von Bufo viridis Laur. (salamandra-journal.com)
- The first was one of the few spots of isolated Green Toad ( Bufo viridis ) populations in Germany. (hylawerkgroep.be)
- esculentus ), Alpine Newt ( Ichthyosaura alpestris ), Viviparous Lizard ( Zootoca vivipara ), Common Frog ( Rana temporaria ) and a dead Common Toad ( Bufo bufo ). (hylawerkgroep.be)
- During the entire research process we identified 8 species: salamander (Salamandra salamandra), the alpine newt (Triturus alpestris), the Carpathian newt (Triturus montandoni), the bittern (Bombina variegata), the toad (Bufo bufo), the green toad (Bufo viridis), the agile frog (Rana dalmatin) and the common frog (Rana temporaria). (muntiimaramuresului.ro)
Arvalis1
- The sharp-faced frog , or marsh frog (Rana arvalis), is the most common amphibian species. (world-animal.com)
Species7
- Ranavirus can wipe out entire common frog populations and, though the new findings need further investigation, the researchers hope their work could help the species. (frontiersin.org)
- However, both species have been reported to be experiencing population declines, primarily because of urbanisation causing conversion and degradation of suitable habitats (IUCN SSC Amphibian Specialist Group 2013 , 2016 ). (koedoe.co.za)
- I study size-dependent interactions within and between fish species and effects of fishing and climate change on population dynamics and ecological processes. (umu.se)
- My general research focus on size dependent predatory and competitive interactions within and between fish species and how these, together with abiotic factors, affect the size structure, density, production and dynamics of fish populations and fish communities. (umu.se)
- 58 from the 126 butterfly species existing in the MMNP are included the very first four categories on the National Red List (EX - one specie, CR - 4 species, EN - 13 species, VU - 30 species). (muntiimaramuresului.ro)
- Mixed signals in life-history and thermal ecology across populations and altitude suggest complex responses to variable conditions across altitude in this species. (podarcis.eu)
- The second most researched species appears to be the European Common Frog ( Rana temporaria ). (willwatsonecology.com)
Common-frog popula1
- By investigating 92 common-frog populations from a wide range of elevations throughout Switzerland, we show that sex-chromosome differentiation strongly correlates with alleles at the candidate sex-determining gene Dmrt1 . (datadryad.org)
Frog17
- Isolation of an iridovirus-like agent from the green frog ( Rana esculenta L.). Vet Arch Zagreb. (cdc.gov)
- Cunningham AA , Langton TES , Bennet PM , Lewin JF , Drury SEN , Gough RE , Pathological and microbiological findings from incidents of unusual mortality of the common frog ( Rana temporaria ). (cdc.gov)
- Researchers began tracking the disease and recently were able to detect genetic DNA evidence of ranavirus even in frog populations that show no signs of the disease. (wildlife.org)
- They looked at the skin microbiome of five European common frog ( Rana temporaria ) populations that experienced mass die-offs due to ranavirus and five populations that did not. (wildlife.org)
- This article discusses the discovery of 56 fragments of skeletal remains of the female common frog (Rana temporaria) and three bones of a bird with no further taxonomic classification. (muni.cz)
- The population ecology of a self-maintaining colony of the Common frog (Rana temporaria) , Journal of Zoology 158(4), 453-474. (muni.cz)
- The date of spawning in populations of the common frog (Rana temporaria) from different altitudes in northern England , Journal of Zoology 205(1), 137-154. (muni.cz)
- The European frog ( Rana temporaria ) mates with females during the early spring. (bk46.com)
- The European common frog ( Rana temporaria ) of the family Ranidae can be found throughout Europe. (bk46.com)
- The common frog Rana temporaria shows extraordinary variation in its sex determination system. (parisveltsos.com)
- To address these issues, we compared molecular and quantitative genetic differentiation between six common frog (Rana temporaria) populations along an approximately 1600 km long latitudinal gradient across Scandinavia. (abo.fi)
- Kovács T, Herczeg G, Hettyey A. Responses in the diet composition of the common frog (Rana Temporaria) to the stochastic gradation of autumnal moth (Epirrita autumnata) larvae. (inist.fr)
- The common frog , or the common frog , or the European frog (Rana temporaria) is one of the most widespread in Europe, where it inhabits forests, the shores of water bodies, wet swampy places, forest-steppe, steppe. (world-animal.com)
- The marsh frog (Rana ridibunda) can be seen all year round but is rare and limited to the Kent and East Sussex areas. (letsgogardening.co.uk)
- The pool frog (Rana lessonae) became extinct in the UK in the 1990's as a result of their ponds being drained or becoming overgrown. (letsgogardening.co.uk)
- Common frog (Rana temporaria) and its spawn in a pond in West Runton, North Norfolk. (countrylife.co.uk)
- Grefner, NM, Yakovleva, TL & Boreysha, IK 1998, Effects of electromagnetic radiation on tadpole development in the common frog ( Rana temporaria L.). Russian Journal of Ecology, 29: 133-134. (ac.ir)
Ranavirus1
- Laboratory trials will help establish whether a history of ranavirus infection causes the microbiome differences, or whether these are pre-existing differences that predispose some populations to infection. (frontiersin.org)
Differentiation3
- However many populations show varying levels of Y haplotype differentiation. (parisveltsos.com)
- The degree of population differentiation (Q(ST) approximate to 0.81) in three heritable quantitative traits (age and size at metamorphosis, growth rate) exceeded that in eight (neutral) microsatellite loci (F-ST = 0.24). (abo.fi)
- Pairwise comparisons of F-ST and Q(ST) estimates across populations and treatments revealed that the degree of quantitative trait differentiation was not generally predictable from knowledge of that in molecular markers. (abo.fi)
Zootoca1
- Morphological variability of the Cantabro-Pyrenean populations of Zootoca vivipara (Jacquin, 1787) with description of a new subspecies (Squamata: Sauria: Lacertidae). (repfocus.dk)
19901
- Blaustein A. R. and Wake D. B. (1990), «Declining amphibian populations: a global phenomenon? (folium.ru)
Amphibian population2
- 2020. Telomere attrition with age in a wild amphibian population. (eco-evo-devo.com)
- Biotic factors in amphibian population declines. (concordia.ca)
Skin microbiome1
- They found that populations with a history of outbreaks had a "distinct" skin microbiome when compared to those where no outbreaks had occurred. (frontiersin.org)
Genetic3
- 2020. Dwarfism in close continental amphibian populations despite lack of genetic isolation. (eco-evo-devo.com)
- Adaptive plasticity favors phenotypic diversity and increases population viability, as well as facilitates the maintenance of genetic variation reducing the severity of bottleneck events during rapid environmental change, and also by shielding genetic variants from selection. (upo.es)
- In XX populations, sex determination is assumed to be non-genetic, as we do not know of any region of the genome associated with sex (random sex determination), while XY populations have a genetic component to sex determination, which is not always completely penetrant. (parisveltsos.com)
Dynamics5
- We are simulating the invasion of non-random sex determining alleles into populations with random sex determination, to try to understand more about the sex chromosome evolution dynamics in such systems. (parisveltsos.com)
- Traditional mathematical models for studying the effects of environmental toxins on population dynamics usually assume that the toxic effects are immediate. (aimspress.com)
- Dynamics of a toxin-mediated aquatic population model with delayed toxic responses[J]. Mathematical Biosciences and Engineering, 2020, 17(5): 5907-5924. (aimspress.com)
- Y. Kuang, Delay Differential Equations: With Applications in Population Dynamics , Academic Press, 1993. (aimspress.com)
- J. M. Cushing, Integro-differential Equations and Delay Models in Population Dynamics , Springer Science & Business Media, 2013. (aimspress.com)
Females5
- The Y-haplotype effect might result from differences in the penetrance of alleles at the sex-determining locus (such that sex reversal and ensuing X-Y recombination are more frequent in Y B populations), and/or fixation of an inversion on Y A (as supported by the empirical observation that Y A haplotypes might not recombine in XY A females). (datadryad.org)
- Most population have indistinguishable haplotypes in males and females in all chromosomes, which is termed the XX-undifferentiated race. (parisveltsos.com)
- Mean body length was found to be 70.41 and 69.42 mm and 54.18 and 56.11 mm for females and males of the highland and the lowland populations, respectively. (erdogan.edu.tr)
- While mean body mass of the females and males from the highland population was 44.83 and 42.73 g, it was 19.09 and 19.66 g in the lowland population, respectively. (erdogan.edu.tr)
- In addition, a significant positive correlation was found between age and body measurements (SVL and body mass) in both males and females of the populations. (erdogan.edu.tr)
Ecosystems1
- More specifically, present main research approaches focus on how fish populations, fish communities and ecosystems are affected by climate change and fisheries. (umu.se)
Traits1
- Q(ST) estimates obtained using animals subjected to different rearing conditions (temperature and food treatments) revealed some environmental dependency in patterns of population divergence in quantitative traits, but in general, these effects were weak in comparison to overall patterns. (abo.fi)
European2
- The invasive exotic bullfrog ( Lithobates catesbeianus ) has been introduced in several European countries and has established large breeding populations in France, Italy, Germany, Greece, and Belgium ( 6 ). (cdc.gov)
- This study was partly performed in the framework of European Union Interreg IVA project IVA-VLANED-2.31 "Invasieve exoten in Vlaanderen en Zuid-Nederland-INVEXO. (cdc.gov)
Toxicants3
- T. G. Hallam, C. E. Clark, G. S. Jordan, Effects of toxicants on populations: A qualitative approach II. (aimspress.com)
- T. G. Hallam, J. T. De Luna, Effects of toxicants on populations: A qualitative approach III. (aimspress.com)
- Possible interrelations among environmental toxicants, amphibian development, and decline of amphibian populations. (concordia.ca)
Haplotypes1
- Y-specific Dmrt1 haplotypes cluster into two main haplogroups, Y A and Y B , with a phylogeographic signal that parallels mtDNA haplotypes: Y A populations, with mostly well-differentiated sex chromosomes, occur primarily south of the main alpine ridge that bisects Switzerland, while Y B populations, with mostly undifferentiated (proto-)sex chromosomes, occur north of this ridge. (datadryad.org)
Allele1
- We also found evidence of diversifying selection as indicated by divergent allele frequencies among populations and high Theta k values. (scilifelab.se)
Mortality3
- However, the effects of toxins on the reproduction and mortality of aquatic populations can be delayed in reality. (aimspress.com)
- The results show that the delayed effect on the reproduction of aquatic populations does not affect the stability of the interior equilibrium, but the delayed effect on the mortality of aquatic populations can destabilize the interior equilibrium. (aimspress.com)
- The research on the effects of fishing focuses on how different types of fisheries and fishing mortality, size-dependent interactions between fish individuals and the variation in productivity between different habitats(and resources)affect the densities and size structure of fish populations. (umu.se)
Impacts1
- Given evidence of diverse impacts from trout populations, a debate exists around decisions to continue to stock mountain lakes with trout fry. (wikipedia.org)
Aquatic2
- In this paper, we propose a new mathematical model with delayed toxic responses for aquatic populations in polluted aquatic environments. (aimspress.com)
- The Canadian Council of Ministers of the Environment, Canadian water quality guidelines for the protection of aquatic life: Guidance on the site-specific application of water quality guidelines in Canada: procedures for deriving numerical water quality objectives, 2003, http://ceqgrcqe.ccme.ca/download/en/221. (aimspress.com)
Tadpoles1
- To assess the role of bullfrogs as carriers of ranaviruses in Europe, we collected 400 clinically healthy tadpoles of L. catesbeianus from 3 invasive bullfrog populations at Hoogstraten, Belgium (51°47′Ν, 4°75′Ε) during May-June 2010. (cdc.gov)
Methods1
- The purpose of this research is to identify sustainable harvest regimes and to developed long-term monitoring methods and management strategies of lake fish top consumer populations. (umu.se)
Gradient1
- Evaporative water loss differed between populations but did not follow a linear altitudinal gradient. (podarcis.eu)
Differences1
- Colder climate, sufficient food availability, less human impact, and lower predator density in the highland population may explain the differences between the 2 populations. (erdogan.edu.tr)
Structure1
- Another possibility is that the disease emerges within a population that already has a specific microbiome structure, he said. (wildlife.org)
Researchers1
- Thus, some researchers do not mark animals, but use capture rates at the drift fence as an indicator of population size. (researchgate.net)
Exposure1
- drinking water, and food for various age groups in the general population, air (particularly indoor air) appears to be the most important source of exposure to dichloromethane in Canada. (canada.ca)
Found2
- This was true, they found, regardless of where the populations were located geographically. (wildlife.org)
- Mean age, SVL, and body mass in the highland population were found to be significantly higher than in the lowland population. (erdogan.edu.tr)
Climate1
- While nearly 50% of this climate driven niche is currently occupied by developed lands, 10 out of 26 reasonably confirmed Armenian populations of P. parva (38.5%) have been lost over the past 110 years. (podarcis.eu)
Factors1
- Furthermore, corticosterone and the antioxidant enzyme glutathione reductase were the most sensitive parameters against the studied factors, and hence good candidates for further use in physiological monitoring of natural populations. (upo.es)
Estimate1
- Other workers use mark-recapture techniques to estimate population sizes. (researchgate.net)
Fish1
- Our previous experience shows that without repeated introductions, fish populations do not last for a long time, but their impact is nevertheless considerable, leading to a reduction or even the dissapearance of many invertebrate and amphibian populations. (muntiimaramuresului.ro)
Germany1
- Eleven Years of Monitoring: Amphibian Populations in an Agricultural Landscape near Bonn (Germany). (researchgate.net)
Natural1
- The preservation of these habitats (leakage ditches, tractor traces, springs, holes, etc.) is vital for the permanence of the amphibian populations, taking into consideration the fact that there are very few natural habitats. (muntiimaramuresului.ro)