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Heikki Henttonen - One of the best experts on this subject based on the ideXlab platform.
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molecular and morphological evidence for multiple species within paranoplocephala omphalodes cestoda anoplocephalidae in microtus voles arvicolinae
Zoologica Scripta, 2004Co-Authors: Voitto Haukisalmi, Heikki Henttonen, Lotta M. Wickström, Jarkko Hantula, András GubányiAbstract:Haukisalmi, V., Wickstrom, L. M., Henttonen, H., Hantula, J. & Gubanyi, A. (2004). Molecular and morphological evidence for multiple species within Paranoplocephala omphalodes (Cestoda, Anoplocephalidae) in Microtus voles (Arvicolinae). —Zoologica Scripta, 33, 277–290. The present study was designed to test the hypothesis that the anoplocephalid cestode Paranoplocephala omphalodes (Hermann, 1783), a Holarctic parasite of Microtus voles, is a complex of host-specific species, rather than a single host-generalist species, using uni- and multivariate morphometrics and DNA sequence data from the mitochondrial cytochrome oxidase I gene. The phylogenetic methods applied to the mtDNA sequence data showed consistently that the cestodes morphologically recognizable as P. omphalodes include four well-supported monophyletic groups, representing at least three distinct, largely host-specific species. Multivariate morphometrics (discriminant analysis) successfully distinguished the four main mtDNA clades of P. omphalodes-like cestodes. The true P. omphalodes is shown to be a parasite of Microtus arvalis, M. agrestis and Clethrionomys glareolus in Europe. Microtus oeconomus harbours two host-specific, allopatric and possibly conspecific clades, one with a Holarctic and another with an (eastern) Beringian (Alaskan) distribution. The eastern Beringian endemic M. miurus is also parasitized with a host-specific, morphologically divergent species of Paranoplocephala. The cestode clades recognized in M. oeconomus and M. miurus represent 2–3 undescribed species. Molecular phylogenetic analyses supported the monophyly of the ‘northern clade’ of Paranoplocephala spp., an assemblage including P. kalelai from Clethrionomys spp., P. macrocephala from Microtus spp. and all clades of P. omphalodes-like cestodes except those representing the true P. omphalodes from Europe. The intra- and interspecific phylogeny within the northern clade is compared tentatively with the known evolutionary history of the hosts.
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Dynamics of intestinal coccidia in peak density Microtus agrestis, Microtus oeconomus and Clethrionomus glareolus populations in Finland
Ecography, 1998Co-Authors: Juha Laakkonen, T. Soveri, Antti Oksanen, Heikki HenttonenAbstract:Study of seasonal changes in the occurrence of Eimeria spp. in Microtus agrestis, Clethrionomys glareolus and Microtus oeconomus populations in Finland showed distinct seasonal variation in all three host species: the peaks occurred in both prevalence and density of infection in early autumn. The low prevalence and density of eimerian infections before and during the main crash of vole populations in late winter indicate that these organisms, although potentially pathogenic, do not significantly contribute to the drastic decline in cyclic vole populations.
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Prevalence of Cryptosporidium sp. in Peak Density Microtus agrestis, Microtus oeconomus and Clethrionomys glareolus Populations
Journal of wildlife diseases, 1994Co-Authors: Juha Laakkonen, T. Soveri, Heikki HenttonenAbstract:The prevalence of Cryptosporidia was determined in high density populations of Microtus agrestis, Microtus oeconomus, and Clethrionomys glareolus in Finland. One of 131 M. agrestis and one of 41 C. glareolus each were found to be infected with Cryptosporidium sp.; none were found in 43 Microtus oeconomus. These apparently healthy voles had neither signs of clinical disease nor histopathological changes in intestines.
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coexistence in helminths of the bank vole Clethrionomys glareolus i patterns of co occurrence
Journal of Animal Ecology, 1993Co-Authors: Voitto Haukisalmi, Heikki HenttonenAbstract:We describe the patterns of co-occurrence in gastrointestinal helminths of the bank vole Clethrionomys glareolus at two localities in Finland, Pallasjarvi in western Lapland and Lammi in southern Finland. Four of 12 pairs of helminth species showed significant, but often inconsistent, positive co-occurrence patterns (presence - absence data). Similarly, the significant pairwise correlations in helminth abundance were rare (three of 10 pairs) and inconsistent. The rarity of significant overall associations among helminth species in the presence-absence data (two positive associations in seven data sets) and total absence in the density data support the idea of independent co-occurrence
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coexistence in helminths of the bank vole Clethrionomys glareolus ii intestinal distribution and interspecific interactions
Journal of Animal Ecology, 1993Co-Authors: Voitto Haukisalmi, Heikki HenttonenAbstract:1. We studied the intestinal distribution of helminths (cestodes and nematodes) in the bank vole Clethrionomys glareolus, and changes in distribution due to the presence and varying abundance of other species. The material was obtained from two localities in Finland: Pallasjarvi in western Lapland and Lammi in southern Finland. 2. The intestinal distribution of the common species Heligmosomum mixtum (Nematoda) was affected by the rare species Capillaria sp. (Nematoda) and Paranolocephala gracilis (Cestoda). The common species showed inconsistent negative interactions with other common species. 3. The data indicate that interactions between the intestinal helminths of the bank vole are most likely to occur between species with large intestinal overlap, but not necessarily feeding overlap
Petr Kotlik - One of the best experts on this subject based on the ideXlab platform.
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the complete mitochondrial genome of the bank vole Clethrionomys glareolus rodentia arvicolinae
Mitochondrial DNA, 2016Co-Authors: Karolina Bendova, Silvia Markova, Jeremy B Searle, Petr KotlikAbstract:We present the first complete sequence of the bank vole (Clethrionomys glareolus) mitochondrial genome (GenBank accession no. KF918859). The bank vole mitogenome is 16,353 base pairs long and shows the gene content, genome architecture and gene strand asymmetry typical for mammals. The sequence provides an important new genomic resource for the bank vole, which is a popular study species in ecological and evolutionary research.
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A northern glacial refugium for bank voles (Clethrionomys glareolus)
Proceedings of the National Academy of Sciences of the United States of America, 2006Co-Authors: Petr Kotlik, Valérie Deffontaine, Silvia Mascheretti, Jan Zima, Johan Michaux, Jeremy B SearleAbstract:There is controversy and uncertainty on how far north there were glacial refugia for temperate species during the Pleistocene glaciations and in the extent of the contribution of such refugia to present-day populations. We examined these issues using phylogeographic analysis of a European woodland mammal, the bank vole (Clethrionomys glareolus). A Bayesian coalescence analysis indicates that a bank vole population survived the height of the last glaciation (≈25,000–10,000 years B.P.) in the vicinity of the Carpathians, a major central European mountain chain well north of the Mediterranean areas typically regarded as glacial refugia for temperate species. Parameter estimates from the fitted isolation with migration model show that the divergence of the Carpathian population started at least 22,000 years ago, and it was likely followed by only negligible immigration from adjacent regions, suggesting the persistence of bank voles in the Carpathians through the height of the last glaciation. On the contrary, there is clear evidence for gene flow out of the Carpathians, demonstrating the contribution of the Carpathian population to the colonization of Europe after the Pleistocene. These findings are consistent with data from animal and plant fossils recovered in the Carpathians and provide the clearest phylogeographic evidence to date of a northern glacial refugium for temperate species in Europe.
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beyond the mediterranean peninsulas evidence of central european glacial refugia for a temperate forest mammal species the bank vole Clethrionomys glareolus
Molecular Ecology, 2005Co-Authors: Valérie Deffontaine, Jeremy B Searle, Petr Kotlik, Roland Libois, Roger Sommer, Caroline M Nieberding, Emmanuel Paradis, Johan MichauxAbstract:This study details the phylogeographic pattern of the bank vole, Clethrionomys glareolus,a European rodent species strongly associated with forest habitat. We used sequences of 1011 base pairs of the mitochondrial DNA cytochrome b gene from 207 bank voles collected in 62 localities spread throughout its distribution area. Our results reveal the presence of three Mediterranean (Spanish, Italian and Balkan) and three continental (western, eastern and ‘Ural’) phylogroups. The endemic Mediterranean phylogroups did not contribute to the postglacial recolonization of much of the Palaearctic range of species. Instead, the major part of this region was apparently recolonized by bank voles that survived in glacial refugia in central Europe. Moreover, our phylogeographic analyses also reveal differentiated populations of bank voles in the Ural mountains and elsewhere, which carry the mitochondrial DNA of another related vole species, the ruddy vole (Clethrionomys rutilus). In conclusion, this study demonstrates a complex phylogeographic history for a forest species in Europe which is sufficiently adaptable that, facing climate change, survives in relict southern and northern habitats. The high level of genetic diversity characterizing vole populations from parts of central Europe also highlights the importance of such regions asa source of intraspecific genetic biodiversity.
Juha Laakkonen - One of the best experts on this subject based on the ideXlab platform.
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Dynamics of intestinal coccidia in peak density Microtus agrestis, Microtus oeconomus and Clethrionomus glareolus populations in Finland
Ecography, 1998Co-Authors: Juha Laakkonen, T. Soveri, Antti Oksanen, Heikki HenttonenAbstract:Study of seasonal changes in the occurrence of Eimeria spp. in Microtus agrestis, Clethrionomys glareolus and Microtus oeconomus populations in Finland showed distinct seasonal variation in all three host species: the peaks occurred in both prevalence and density of infection in early autumn. The low prevalence and density of eimerian infections before and during the main crash of vole populations in late winter indicate that these organisms, although potentially pathogenic, do not significantly contribute to the drastic decline in cyclic vole populations.
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Prevalence of Cryptosporidium sp. in Peak Density Microtus agrestis, Microtus oeconomus and Clethrionomys glareolus Populations
Journal of wildlife diseases, 1994Co-Authors: Juha Laakkonen, T. Soveri, Heikki HenttonenAbstract:The prevalence of Cryptosporidia was determined in high density populations of Microtus agrestis, Microtus oeconomus, and Clethrionomys glareolus in Finland. One of 131 M. agrestis and one of 41 C. glareolus each were found to be infected with Cryptosporidium sp.; none were found in 43 Microtus oeconomus. These apparently healthy voles had neither signs of clinical disease nor histopathological changes in intestines.
Voitto Haukisalmi - One of the best experts on this subject based on the ideXlab platform.
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molecular and morphological evidence for multiple species within paranoplocephala omphalodes cestoda anoplocephalidae in microtus voles arvicolinae
Zoologica Scripta, 2004Co-Authors: Voitto Haukisalmi, Heikki Henttonen, Lotta M. Wickström, Jarkko Hantula, András GubányiAbstract:Haukisalmi, V., Wickstrom, L. M., Henttonen, H., Hantula, J. & Gubanyi, A. (2004). Molecular and morphological evidence for multiple species within Paranoplocephala omphalodes (Cestoda, Anoplocephalidae) in Microtus voles (Arvicolinae). —Zoologica Scripta, 33, 277–290. The present study was designed to test the hypothesis that the anoplocephalid cestode Paranoplocephala omphalodes (Hermann, 1783), a Holarctic parasite of Microtus voles, is a complex of host-specific species, rather than a single host-generalist species, using uni- and multivariate morphometrics and DNA sequence data from the mitochondrial cytochrome oxidase I gene. The phylogenetic methods applied to the mtDNA sequence data showed consistently that the cestodes morphologically recognizable as P. omphalodes include four well-supported monophyletic groups, representing at least three distinct, largely host-specific species. Multivariate morphometrics (discriminant analysis) successfully distinguished the four main mtDNA clades of P. omphalodes-like cestodes. The true P. omphalodes is shown to be a parasite of Microtus arvalis, M. agrestis and Clethrionomys glareolus in Europe. Microtus oeconomus harbours two host-specific, allopatric and possibly conspecific clades, one with a Holarctic and another with an (eastern) Beringian (Alaskan) distribution. The eastern Beringian endemic M. miurus is also parasitized with a host-specific, morphologically divergent species of Paranoplocephala. The cestode clades recognized in M. oeconomus and M. miurus represent 2–3 undescribed species. Molecular phylogenetic analyses supported the monophyly of the ‘northern clade’ of Paranoplocephala spp., an assemblage including P. kalelai from Clethrionomys spp., P. macrocephala from Microtus spp. and all clades of P. omphalodes-like cestodes except those representing the true P. omphalodes from Europe. The intra- and interspecific phylogeny within the northern clade is compared tentatively with the known evolutionary history of the hosts.
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coexistence in helminths of the bank vole Clethrionomys glareolus i patterns of co occurrence
Journal of Animal Ecology, 1993Co-Authors: Voitto Haukisalmi, Heikki HenttonenAbstract:We describe the patterns of co-occurrence in gastrointestinal helminths of the bank vole Clethrionomys glareolus at two localities in Finland, Pallasjarvi in western Lapland and Lammi in southern Finland. Four of 12 pairs of helminth species showed significant, but often inconsistent, positive co-occurrence patterns (presence - absence data). Similarly, the significant pairwise correlations in helminth abundance were rare (three of 10 pairs) and inconsistent. The rarity of significant overall associations among helminth species in the presence-absence data (two positive associations in seven data sets) and total absence in the density data support the idea of independent co-occurrence
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coexistence in helminths of the bank vole Clethrionomys glareolus ii intestinal distribution and interspecific interactions
Journal of Animal Ecology, 1993Co-Authors: Voitto Haukisalmi, Heikki HenttonenAbstract:1. We studied the intestinal distribution of helminths (cestodes and nematodes) in the bank vole Clethrionomys glareolus, and changes in distribution due to the presence and varying abundance of other species. The material was obtained from two localities in Finland: Pallasjarvi in western Lapland and Lammi in southern Finland. 2. The intestinal distribution of the common species Heligmosomum mixtum (Nematoda) was affected by the rare species Capillaria sp. (Nematoda) and Paranolocephala gracilis (Cestoda). The common species showed inconsistent negative interactions with other common species. 3. The data indicate that interactions between the intestinal helminths of the bank vole are most likely to occur between species with large intestinal overlap, but not necessarily feeding overlap
Julia Schneider - One of the best experts on this subject based on the ideXlab platform.
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geographical distribution and genetic diversity of bank vole hepaciviruses in europe
Viruses, 2021Co-Authors: Bernd Hoffmann, Julia Schneider, Cristina Fevola, Marie Luisa Schmidt, Christian Imholt, Stefan Fischer, Frauke EckeAbstract:The development of new diagnostic methods resulted in the discovery of novel hepaciviruses in wild populations of the bank vole (Myodes glareolus, syn. Clethrionomys glareolus). The naturally infected voles demonstrate signs of hepatitis similar to those induced by hepatitis C virus (HCV) in humans. The aim of the present research was to investigate the geographical distribution of bank vole-associated hepaciviruses (BvHVs) and their genetic diversity in Europe. Real-time reverse transcription polymerase chain reaction (RT-qPCR) screening revealed BvHV RNA in 442 out of 1838 (24.0%) bank voles from nine European countries and in one of seven northern red-backed voles (Myodes rutilus, syn. Clethrionomys rutilus). BvHV RNA was not found in any other small mammal species (n = 23) tested here. Phylogenetic and isolation-by-distance analyses confirmed the occurrence of both BvHV species (Hepacivirus F and Hepacivirus J) and their sympatric occurrence at several trapping sites in two countries. The broad geographical distribution of BvHVs across Europe was associated with their presence in bank voles of different evolutionary lineages. The extensive geographical distribution and high levels of genetic diversity of BvHVs, as well as the high population fluctuations of bank voles and occasional commensalism in some parts of Europe warrant future studies on the zoonotic potential of BvHVs.