scholarly journals Morphometric comparison of the erythrocytes between Triturus marmoratus and other amphibian species

2015 ◽  
Author(s):  
Luis Docampo
Keyword(s):  
Amphibian Species ◽  
Triturus Marmoratus

scholarly journals Influence of substrate types and morphological traits on movement behavior in a toad and newt species

PeerJ ◽  
2019 ◽  
Vol 6 ◽  
pp. e6053 ◽  
Author(s):  
Audrey Trochet ◽  
Hugo Le Chevalier ◽  
Olivier Calvez ◽  
Alexandre Ribéron ◽  
Romain Bertrand ◽  
...  
Keyword(s):  
Bufo Bufo ◽  
Movement Behavior ◽  
Negative Effects ◽  
Amphibian Species ◽  
Population Extinction ◽  
Heterogeneous Landscapes ◽  
Ecological Requirements ◽  
Heterogeneous Habitats ◽  
Influence Of Substrate ◽  
Triturus Marmoratus

Background Inter-patch movements may lead to genetic mixing, decreasing both inbreeding and population extinction risks, and is hence a crucial aspect of amphibian meta-population dynamics. Traveling through heterogeneous landscapes might be particularly risky for amphibians. Understanding how these species perceive their environment and how they move in heterogeneous habitats is an essential step in explaining metapopulation dynamics and can be important for predicting species’ responses to climate change and for conservation policy and management. Methods Using an experimental approach, the present study focused on the movement behavior (crossing speed and number of stops) on different substrates mimicking landscape components (human-made and natural substrates) in two amphibian species contrasting in locomotion mode: the common toad (Bufo bufo), a hopping and burrowing anuran and the marbled newt (Triturus marmoratus), a walking salamander. We tested the hypothesis that species reaction to substrate is dependent on specific ecological requirements or locomotion modes because of morphological and behavioral differences. Results In both species, substrate type influenced individual crossing speed, with individuals moving faster on soil than on concrete substrate. We also demonstrated that long-legged individuals moved faster than individuals with short legs. In both species, the number of stops was higher in females than in males. In common toads, the number of stops did not vary between substrates tested, whereas in marbled newts the number of stops was higher on concrete than on soil substrate. Discussion We highlighted that concrete substrate (mimicking roads) negatively affect the crossing speed of both studied species, with an effect potentially higher in marbled newts. Our findings corroborate negative effects of such heterogeneous landscapes on movement behavior of two amphibian species, which may have implications for the dynamics of metapopulations.

Cryobanking of Amphibian Genetic Recourses in Russia: Past and Future

2019 ◽  
Vol 26 (6) ◽  
pp. 319-324
Author(s):  
Victor K. Uteshev ◽  
Edith N. Gakhova ◽  
Ludmila I. Kramarova ◽  
Natalia V. Shishova ◽  
Svetlana A. Kaurova ◽  
...  
Keyword(s):  
Genetic Material ◽  
Reproductive Technologies ◽  
Cell Biophysics ◽  
Amphibian Species ◽  
Modern Biology ◽  
Rare And Endangered Species ◽  
Long Term Storage ◽  
Current State ◽  
Rare And Endangered ◽  
Academy Of Sciences

In modern biology, a search for efficient and safe ways of long-term storage of animal genomes is vital for the survival of rare and endangered species. To date, the only reliable method of prolonging the preservation of genome is deep freezing of somatic and reproductive cells, including spermatozoa. Here we overview the current state of reproductive technologies and present the cryopresevation strategies of genetic material of selected amphibian species. These strategies were developed at the Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia. Cryopreservation could help managing the threatened populations of amphibian species through genome storage and mediate the production of healthy animals from the stored material.

scholarly journals An Overview of the Helminths of Moor Frog Rana arvalis Nilsson, 1842 (Amphibia: Anura) in the Volga Basin

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 61
Author(s):  
Igor V. Chikhlyaev ◽  
Alexander B. Ruchin
Keyword(s):  
Systematic Position ◽  
Helminth Fauna ◽  
Helminth Species ◽  
Volga Basin ◽  
Rana Arvalis ◽  
Amphibian Species ◽  
Volga River ◽  
Spirometra Erinacei ◽  
First Time ◽  
Moor Frog

This is the first review of the helminth fauna of the moor frog Rana arvalis Nilsson, 1842 from the Volga river basin (Russia). The article summarizes the authors’ and literature data on the helminthic fauna of this species. The method of complete helminthological dissection was used. Thirthy-eight helminth species were recorded from three classes: Cestoda (1), Trematoda (28), and Chromadorea (9). Nine helminth species are new to the moor frog in Russia: trematodes Gorgodera varsoviensis Sinitzin, 1905, Strigea falconis Szidat, 1928, larvae, Neodiplostomum spathoides Dubois, 1937, larvae, Tylodelphys excavata (Rudolphi, 1803), larvae, Pharyngostomum cordatum (Diesing, 1850), larvae, Astiotrema monticelli Stossich, 1904, larvae and Encyclometra colubrimurorum (Rudolphi, 1819), larvae, nematodes Strongyloides spiralis Grabda-Kazubska, 1978 and Icosiella neglecta (Diesing, 1851). The cestode Spirometra erinacei (Rudolphi, 1918), larvae were observed of this amphibian species in the Volga basin for the first time. The nematodes Rhabdias bufonis, Oswaldocruzia filiformis, Cosmocerca ornata and the trematode Haplometra cylindracea form the core of the helminth fauna of the moor frog. Information on species of helminths includes systematic position, localization, areas of detection, type and scheme of life cycle, geographical distribution, and degree of specificity to host amphibians.

scholarly journals Synergistic impacts of global warming and thermohaline circulation collapse on amphibians

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Julián A. Velasco ◽  
Francisco Estrada ◽  
Oscar Calderón-Bustamante ◽  
Didier Swingedouw ◽  
Carolina Ureta ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Thermohaline Circulation ◽  
Climate Model ◽  
Global Climate ◽  
Extinction Risk ◽  
Meridional Overturning Circulation ◽  
Mitigation Strategies ◽  
Amphibian Species ◽  
Climate Conditions

AbstractImpacts on ecosystems and biodiversity are a prominent area of research in climate change. However, little is known about the effects of abrupt climate change and climate catastrophes on them. The probability of occurrence of such events is largely unknown but the associated risks could be large enough to influence global climate policy. Amphibians are indicators of ecosystems’ health and particularly sensitive to novel climate conditions. Using state-of-the-art climate model simulations, we present a global assessment of the effects of unabated global warming and a collapse of the Atlantic meridional overturning circulation (AMOC) on the distribution of 2509 amphibian species across six biogeographical realms and extinction risk categories. Global warming impacts are severe and strongly enhanced by additional and substantial AMOC weakening, showing tipping point behavior for many amphibian species. Further declines in climatically suitable areas are projected across multiple clades, and biogeographical regions. Species loss in regional assemblages is extensive across regions, with Neotropical, Nearctic and Palearctic regions being most affected. Results underline the need to expand existing knowledge about the consequences of climate catastrophes on human and natural systems to properly assess the risks of unabated warming and the benefits of active mitigation strategies.

Dietary ecology of common amphibian species in a seasonal location in northern Sri Lanka

2020 ◽  
Vol 54 (27-28) ◽  
pp. 1797-1812
Author(s):  
R. B. Loshitha R. Sarathchandra ◽  
Kanishka D. B. Ukuwela ◽  
Rajnish P. G. Vandercone
Keyword(s):  
Sri Lanka ◽  
Amphibian Species ◽  
Dietary Ecology

scholarly journals Examining the Evidence for Chytridiomycosis in Threatened Amphibian Species

PLoS ONE ◽  
2011 ◽  
Vol 6 (8) ◽  
pp. e23150 ◽  
Author(s):  
Matthew Heard ◽  
Katherine F. Smith ◽  
Kelsey Ripp
Keyword(s):  
Amphibian Species

Relationships among Isolated Wetland Size, Hydroperiod, and Amphibian Species Richness: Implications for Wetland Regulations

2000 ◽  
Vol 14 (2) ◽  
pp. 414-419 ◽  
Author(s):  
Joel W. Snodgrass ◽  
Mark J. Komoroski ◽  
A. Lawrence Bryan ◽  
Joanna Burger
Keyword(s):  
Species Richness ◽  
Amphibian Species ◽  
Isolated Wetland

Widespread infection of the Eastern red-spotted newt (Notophthalmus viridescens) by a new species of Amphibiocystidium, a genus of fungus-like mesomycetozoan parasites not previously reported in North America

Parasitology ◽  
2007 ◽  
Vol 135 (2) ◽  
pp. 203-215 ◽  
Author(s):  
T. R. RAFFEL ◽  
T. BOMMARITO ◽  
D. S. BARRY ◽  
S. M. WITIAK ◽  
L. A. SHACKELTON
Keyword(s):  
New Species ◽  
North America ◽  
Infectious Diseases ◽  
Emerging Infectious Diseases ◽  
Seasonal Distribution ◽  
Notophthalmus Viridescens ◽  
Amphibian Species ◽  
Mortality And Morbidity ◽  
Causative Agents ◽  
A New Species

SUMMARYGiven the worldwide decline of amphibian populations due to emerging infectious diseases, it is imperative that we identify and address the causative agents. Many of the pathogens recently implicated in amphibian mortality and morbidity have been fungal or members of a poorly understood group of fungus-like protists, the mesomycetozoans. One mesomycetozoan, Amphibiocystidium ranae, is known to infect several European amphibian species and was associated with a recent decline of frogs in Italy. Here we present the first report of an Amphibiocystidium sp. in a North American amphibian, the Eastern red-spotted newt (Notophthalmus viridescens), and characterize it as the new species A. viridescens in the order Dermocystida based on morphological, geographical and phylogenetic evidence. We also describe the widespread and seasonal distribution of this parasite in red-spotted newt populations and provide evidence of mortality due to infection.

Trophic ecology of two amphibian species in patches and core forest of Atlantic Forest: A dietary and isotopic approach

2021 ◽  
Author(s):  
Mateus Oliveira ◽  
Camila Fernanda Moser ◽  
Marluci Muller Rebelato ◽  
Plínio Barbosa Camargo ◽  
Alexandro Marques Tozetti
Keyword(s):  
Atlantic Forest ◽  
Trophic Ecology ◽  
Amphibian Species
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