The Experts below are selected from a list of 2163 Experts worldwide ranked by ideXlab platform
Guillermo Veloanton - One of the best experts on this subject based on the ideXlab platform.
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the complete mitochondrial genome of salamandra salamandra amphibia urodela salamandridae
Mitochondrial DNA Part B, 2016Co-Authors: Kevin P Mulder, Andre Lourenco, Miguel Carneiro, Guillermo VeloantonAbstract:The complete mitochondrial genome of salamandra salamandra was reconstructed using bycatch sequences from an RNAseq library generated from muscle tissue. This study shows the potential of using dat...
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genetic drift and rapid evolution of viviparity in insular fire salamanders salamandra salamandra
Heredity, 2012Co-Authors: Guillermo Veloanton, Kelly R Zamudio, Adolfo CorderoriveraAbstract:Continental islands offer an excellent opportunity to investigate adaptive processes and to time microevolutionary changes that precede macroevolutionary events. We performed a population genetic study of the fire salamander (salamandra salamandra), a species that displays unique intraspecific diversity of reproductive strategies, to address the microevolutionary processes leading to phenotypic and genetic differentiation of island, coastal and interior populations. We used eight microsatellite markers to estimate genetic diversity, population structure and demographic parameters in viviparous insular populations and ovoviviparous coastal and interior populations. Our results show considerable genetic differentiation (FST range: 0.06–0.27), and no clear signs of gene flow among populations, except between the large and admixed interior populations. We find no support for island colonization by rafting or intentional/accidental anthropogenic introductions, indicating that rising sea levels were responsible for isolation of the island populations approximately 9000 years ago. Our study provides evidence of rapid genetic differentiation between island and coastal populations, and rapid evolution of viviparity driven by climatic selective pressures on island populations, geographic isolation with genetic drift, or a combination of these factors. Studies of these viviparous island populations in early stages of divergence help us better understand the microevolutionary processes involved in rapid phenotypic shifts.
Norman Wagner - One of the best experts on this subject based on the ideXlab platform.
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drift compensation in larval european fire salamanders salamandra salamandra amphibia urodela
Hydrobiologia, 2019Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
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Drift compensation in larval European fire salamanders, salamandra salamandra (Amphibia: Urodela)?
Hydrobiologia, 2018Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
Michael Veith - One of the best experts on this subject based on the ideXlab platform.
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drift compensation in larval european fire salamanders salamandra salamandra amphibia urodela
Hydrobiologia, 2019Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
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Drift compensation in larval European fire salamanders, salamandra salamandra (Amphibia: Urodela)?
Hydrobiologia, 2018Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
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The fire salamander, salamandra salamandra L., in central Europe: subspecies distribution and intergradation
Amphibia-Reptilia, 1992Co-Authors: Michael VeithAbstract:Allozyme electrophoresis of 14 loci provided information on the distribution of the two central European subspecies of the fire salamander, salamandra salamandra salamandra (dotted taxon) and S.s.terrestris (striped taxon), along an east-west-transect in Germany. 2183 larvae from 48 populations situated in 14 mountain ranges were studies. A broad (about 140 km wide) zone of intergradition between the two forms is described, ranging from the Hunsruck Mountains in the west to the Spessart in the east. Within this hybrid zone the populations are panmictic. Focussing on the Rhenish Slate Mountains, the western border of the hybrid zone is described in detail. A comparison between allozyme data and morphognostical data (drawn from literature) on the dorsal pattern indicates a discordance between the two data sets. Consequently, the dorsal pattern is ruled out as an indicator for the detection of hybrid populations.
Tanja Reifenrath - One of the best experts on this subject based on the ideXlab platform.
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drift compensation in larval european fire salamanders salamandra salamandra amphibia urodela
Hydrobiologia, 2019Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
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Drift compensation in larval European fire salamanders, salamandra salamandra (Amphibia: Urodela)?
Hydrobiologia, 2018Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
Mark Baubkus - One of the best experts on this subject based on the ideXlab platform.
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drift compensation in larval european fire salamanders salamandra salamandra amphibia urodela
Hydrobiologia, 2019Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
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Drift compensation in larval European fire salamanders, salamandra salamandra (Amphibia: Urodela)?
Hydrobiologia, 2018Co-Authors: Michael Veith, Mark Baubkus, Simone Kugel, Caren Kulpa, Tanja Reifenrath, Malwina Schafft, Norman WagnerAbstract:Organismic drift in lotic waters can have major impact on population dynamics. It is influenced by a variety of interacting abiotic and biotic factors, and species often have evolved specific strategies for drift avoidance and compensation. We studied downstream and upstream movements of larval fire salamanders (salamandra salamandra) within three first-order streams in Germany using up- and downstream traps. We tested several predictions related to the influence of body size, water flow and inclination on the number of upstream and downstream moving larvae. Larval fire salamanders actively moved upstream in all creeks, however, in much lower numbers than downstream. The total body lengths of upstream and downstream moving larvae did not differ significantly; in contrast, downstream drifting larvae were smaller compared to non-drifting larvae collected randomly from the creeks in-between traps. There was no negative effect of the amount of water flow on larval upward movements, but significantly more larvae drifted downstream with the increasing water flow volume. There was no effect of inclination on the amount of either upstream or downstream movements. Our results indicate that upstream movements are a side product of a principle rheotactic behaviour, which prevents larvae from being drifted downstream.
