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1

A morphometric study of the amygdala in the common shrew

100%

Rowniak M., Szteyn S., Robak A.

Folia Morphologica

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2004

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tom 63

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nr 4

The characteristic features of the common shrew amygdala (CA), as shown by volumetric comparisons of the individual nuclei, are the poor development of the lateral (LA) and basomedial (BM) nuclei as well as the particularly strong formation of the basolateral (BL) and lateral olfactory tract (NLOT) nuclei. The central (CE), cortical (CO) and medial (ME) nuclei are also well organised in this species. All these features are even more distinctly visible when the total number of neurons in the nuclei referred to are compared. A comparison of the densities of neurons in the individual nuclei with the mean numerical density of cells in the CA indicates that there are the 3 different regions within the common shrew’s CA. The densities of neurons in the LA, BL, and BM are significantly lower than the mean density of cells in the CA (p < 0.05). In the CE this value does not differ from the mean (p > 0.05). In the CO, ME and NLOT the density values are significantly higher than the mean (p < 0.05). Furthermore, a similar division of the shrew’s CA can, to some extent, be performed using the size parameters of the amygdaloid neurons as a marker. Interestingly, the large neurons populate less densely organised CA areas like the LA, BL and BM, whereas the small cells populate the ME and NLOT, where the neurons are densely arranged. The CE and CO occupy intermediate positions, with the neurons similar in size to the mean for the shrew’s CA.

2

Genetic differentiation between west and east european karyotypic groups of Sorex araneus (Soricomorpha) in Poland

86%

Moska M., Wierzbicki H., Strzala T., Mucha A., Jonkisz A.

Electronic Journal of Polish Agricultural Universities. Series Veterinary Medicine

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2014

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tom 17

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nr 2

3

Craniometric study of the common shrew (Sorex araneus L. 1758) from different localities and chromosomal races across Germany and Europe

86%

Stefen C.

Acta Theriologica

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2013

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tom 58

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nr 3

A total of 440 skulls of common shrews, Sorex araneus, from Germany and Europe (Croatia, Hungary, Austria, and Norway) were studied. The material represented six chromosomal races (Ulm, Laska, Drnholec, Mooswald, Jütland, and Abisko) assignable to the Western European and Northern European karyotypic groups. The race of a few samples was not determined. Twenty-one linear measurements were taken on skulls and mandibles and used in this study. Pearson correlations and multiple linear regressions were used to see the relationship of the cranial variables to altitude, latitude, the chromosomal race, and the geographic location. The results from the tested samples differed; the most negative correlations to latitude were found in the samples assigned to the Western European karyotypic group (WEK), the least negative ones in the samples of the Ulm race. These results indicate the converse of Bergmann's rule. But taking into consideration all the samples of the different karyotypic groups across Europe, the correlations to latitude included positive ones, which would indicate that Sorex follows Bergmann's rule in some of the variables. The studied material of different karyotypic groups could not be differentiated in discriminant analyses. The separation of the studied races within the WEK alone was slightly better, but about 30 % of ungrouped cases remained. Only the separation of the regional samples within one chromosomal race revealed better results but was still very different between the races. This indicates that within the races, regional differences might be strong enough for a separation of the samples and that within a karyotypic group, and even more so across karyotypic groups, regional differences conceal racial differences.

4

Non-disjunction frequency in male complex Robertsonian heterozygotes of the common shrew

86%

Fedyk S., Chetnicki W.

Acta Theriologica

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2010

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tom 55

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nr 1

1-8

Common shrews display two types of Robertsonian (Rb) heterozygosity: simple (where CIII configurations are formed at meiosis I) and complex (which have longer meiotic chains or rings). Based on an analysis of large sample sizes (over 100) of MII cells per specimen, we estimated the non-disjunction frequency in seven Rb homozygotes and 21 complex Rb heterozygotes (CIV and CV) of Sorex araneus Linnaeus, 1758. The analysis showed high betweenindividual variability. The mean level of non-disjunction in homozygotes (2.01%) was significantly lower than in CIV and CV heterozygotes (4.27% and 5.78%, respectively). The study demonstrated that non-disjunction frequency in male CIV and CV heterozygotes was similar to that in simple heterozygotes in the common shrew.

5

Cases of coat colour anomalies in the common shrew, Sorex araneus L.

86%

Chetnicki W., Fedyk S., Bajkowska U.

Folia Biologica

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2007

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tom 55

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nr 1-2

6

Invalidation of Stobnica chromosome race of the common shrew Sorex araneus

86%

Fedyk S., Wojcik J. M., Chetnicki W., Maczewski S.

Acta Theriologica

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2008

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tom 53

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nr 4

In Central Poland, two similar chromosome races of the common shrewSorex araneus Linnaeus, 1758 were earlier described: Drnholec race (arm combinationsgm, hi, ko, nr) and Stobnica race (gm, hi, ko, np). Great similarity in size and G-banding patterns between thenr andnp metacentrics leave open to doubt the actual existence of both races in Poland. The present study, which is based on good quality karyotypes of common shrews from 18 sites, showed the presence of thenr arm combination. There is therefore strong evidence that thenp arm combination was wrongly described and thus the Stobnica race should not be considered valid.

7

Phenotypic diversity and population dynamics: another look (with particular reference to the common shrew Sorex araneus)

86%

Zakharov V. M., Pankakoski E., Sheftel B. I.

Acta Theriologica. Supplement

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1997

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nr 04

We studied temporal changes in the level of phenotypic diversity, measured by the total phenotypic variance for several characters of skull morphology, in two populations of the common shrew Sore:e araneus Linnaeus, 1758. We compared a population from central Siberia having a high-amplitude four-year cycle with a population from southern Finland having noncyclic dynamics. The level of total phenotypic diversity varied significantly among years in both populations, but was correlated neither with density nor with breeding success in either of them. We did, however, find differences between the two populations. When we compared changes in the level of phenotypic diversity with changes in the level of developmental stability, as measured by chance developmental variance (fluctuating asymmetry), the cyclic Siberian population exhibited increased developmental variability in the peak year, which was associated with relatively small proportion of other sources of variation (and genetic variation in particular). In other years, the role of chance variation was less and the proportion of other sources of variance was higher. On the other hand, in the noncyclic Finnish population, oscillations in the level of phenotypic diversity were mainly caused by changes in developmental stability. These results illustrate that not only dynamics of genotype variety, but also the alterations in the level of developmental stability can be of great importance for changes in phenotypic diversity.

8

Note on the systematic status of shrews of the Sorex araneus group in NW Anatolia

86%

Macholan M., Filippucci M. G., Slivkova L., Simson S.

Acta Theriologica

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1999

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tom 44

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nr 1

Macholan M., Filippucci M. G., Slivkova L. and Simson S. 1999. Note on the systematic status of shrews of the Sorex araneus group in NW Anatolia. Acta Theriologica 44: 101-106. Although it was assumed that the northern parts of Asia Minor were occupied by the Caucasian shrew, Sorex satunini, some recent findings have cast doubts on the specific status of shrew populations in NW Anatolia. Here, a single shrew from Uludag was studied using enzyme electrophoresis. It was compared to S. araneus from Europe and S. satunini from NE Turkey as well. The results unequivocally classify the animal under study with S. satunini and it is suggested that the common shrew, S. araneus, does not occur either in NW Anatolia or in Asia Minor in general.

9

Tissue metabolism in the common shrew and the bank vole

72%

Malzahn E.

Acta Theriologica

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1974

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tom 19

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nr 14-25

10

The neuronal structure of the dorsal nucleus of the lateral geniculate body in the common shrew [Sorex araneus] and the bank vole [Clethrionomys glareolus] : Golgi and Nissl studies

72%

Najdzion J., Wasilewska B., Szteyn S., Robak A., Bogus-Nowakowska K., Rowniak M.

Folia Morphologica

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2006

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tom 65

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nr 4

352-358

The topography and neuronal structure of the dorsal nucleus of the lateral geniculate body (GLd) of the common shrew and the bank vole are similar. The lateral geniculate body of both the species examined has a homogeneous structure and no observable cytoarchitectonic lamination. On the basis of the shape of the dendritic arbours as well as the pattern of dendritic arborisations the following two types of neurons were distinguished. Type I “bushy” neurons that have multipolar or round perikarya (common shrew perikarya 9–12 µm, bank vole perikarya 10–13 µm), with 4–6 short thick dendritic trunks that subdivide into many bush-like branches. The dendritic trunks are smooth, in contrast to the distal branches, which are covered with numerous spine-like protrusions of different lengths and forms. An axon emerges from the soma, sometimes very close to one of the primary dendrites. The type I neurons are typically projection cells that send their axons to the primary visual cortex. These neurons predominate in the GLd of both species. Type II neurons, which have an elongated soma with primary dendrites arising from opposite poles of the perikaryon (common shrew perikarya 8–10 µm, bank vole perikarya 9–11 µm). The dendritic arbours of these cells are less extensive and their dendrites have fewer spines than those of the type I neurons. Axons were seldom observed. The type II neurons are presumably interneurons and are definitely less numerous than the type I neurons.

11

Chromosome races of the common shrew Sorex araneus in Poland: a model of karyotype evolution

72%

Wojcik J. M.

Acta Theriologica

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1993

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tom 38

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nr 3

Five distinct chromosome races of the common shrew Sorex araneus Linnaeus, 1758 including different metacentrics with monobrachiat homology have been found in Poland. Their karyotypes include polymorphic arm combinations, and chromosomal forms differing in numbers of acrocentrics can be distinguished among them. The relationship between Polish and other European races of the common shrew has been examined by phylogenetic analysis using parsimony. Five phylogenetic groups of the common shrew, two of them consist only of one race, can be recognized in Europe. The Polish races belong to two groups: the West European and East European phylogenetic groups. A model of chromosomal evolution in the common shrew consisting of two components, an allopatric one and a parapatric or stasipatric one, has been proposed. This model is based on the distribution of different races and different metacentrics in karyotypes of shrews in Poland and in central Europe.

12

Sex chromosome meiotic drive in hybrid males of the common shrew [Sorex araneus]

72%

Fedyk S., Bajkowska U., Chetnicki W.

Folia Biologica

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2005

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tom 53

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nr 3-4

13

Karyotypic variation of the common shrew Sorex araneus in Belarus, Estonia, Latvia, Lithuania and Ukraine

72%

Mishta A. V., Searle J. B., Wojcik J. M.

Acta Theriologica. Supplement

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2000

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tom 45

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nr 1

14

Genetic differentiation of commonn shrew Sorex araneus populations among different alpine valleys revealed by microsatellites

72%

Lugon-Moulin N., Balloux F., Hausser J.

Acta Theriologica. Supplement

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2000

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tom 45

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nr 1

15

A hybrid zone between the chromosomal races Legucki Mlyn and Popielno of the common shrew in North-Eastern Poland: preliminary results

72%

Moska M.

Acta Theriologica

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2003

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tom 48

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nr 4

A newly discovered hybrid zone between two karyotypic races, Łęgucki Młyn (g/r, h/k, i/o, j/l, m/n, p, q) and Popielno (g/r, h/q, i/k, j/l, m/n, o, p), of the common shrew Sorex araneus Linnaeus, 1758 has been studied in north-eastern Poland. In the Łęgucki Młyn/Popielno hybrid zone the complex heterozygotes form theoretically only short meiotic chain configurations, consisting of four or five elements. In all hybrid populations a high frequency of complex heterozygotes was observed, varying from 0.30 to 0.43 between localities. In the centre of the hybrid zone the frequencies of telocentrics h and k increased. In two individuals of the hybrid populations (Krutyń I and Krutyń II), homozygous telocentric for chromosome arms h, i, k, o and q were observed.

16

Chromosome races of the common shrew Sorex araneus in the Ural Mts: a link between Siberia and Scandinavia?

72%

Polyakov A. V., Zima J., Searle J. B., Borodin P. M., Ladygina T.

Acta Theriologica. Supplement

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2000

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tom 45

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nr 1

17

Mapping of five genes from human chromosome 17 to chromosome hn of the common shrew Sorex araneus

72%

Larkin D. M., Serov O. L., Zhdanova N. S.

Acta Theriologica. Supplement

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2000

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tom 45

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nr 1

18

Morphometric variation between karyological categories of the common shrew [Sorex araneus] in the Legucki Mlyn-Popielno hybrid zone

72%

Moska M., Pasko L.

Electronic Journal of Polish Agricultural Universities. Series Veterinary Medicine

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2006

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tom 09

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nr 1

Morphometric variation of the common shrew Sorex araneus Linnaeus, 1758 was studied in the Łęgucki Młyn/Popielno hybrid zone in north-eastern Poland. The shrews of both races and their hybrids were measured. Seventeen cranial and external measurements in 105 young shrews were analysed. Based on the results of canonical analysis and multidimensional scaling we propose a hypothesis on morphometric differences between hybrids and non-hybrids. They may involve three skull parameters: length of the upper and lower dental series, and the length of the upper row of molariform teeth.

19

Genetic differentiation and gene flow between the Drnholec and Legucki Mlyn chromosome races of the common shrew Sorex araneus in Northern Poland

72%

Ratkiewicz M., Supruniuk J., Fedyk S., Banaszek A., Chetnicki W., Szalaj K. A.

Acta Theriologica. Supplement

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2000

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tom 45

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nr 1

20

New chromosome races of the common shrew Sorex araneus from Eastern Siberia

72%

Polyakov A. V., Zima J., Banaszek A., Searle J. B., Borodin P. M.

Acta Theriologica. Supplement

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2000

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tom 45

|

nr 1

Ograniczanie wyników

A morphometric study of the amygdala in the common shrew

Genetic differentiation between west and east european karyotypic groups of Sorex araneus (Soricomorpha) in Poland

Craniometric study of the common shrew (Sorex araneus L. 1758) from different localities and chromosomal races across Germany and Europe

Non-disjunction frequency in male complex Robertsonian heterozygotes of the common shrew

Cases of coat colour anomalies in the common shrew, Sorex araneus L.

Invalidation of Stobnica chromosome race of the common shrew Sorex araneus

Phenotypic diversity and population dynamics: another look (with particular reference to the common shrew Sorex araneus)

Note on the systematic status of shrews of the Sorex araneus group in NW Anatolia

Tissue metabolism in the common shrew and the bank vole

The neuronal structure of the dorsal nucleus of the lateral geniculate body in the common shrew [Sorex araneus] and the bank vole [Clethrionomys glareolus] : Golgi and Nissl studies

Chromosome races of the common shrew Sorex araneus in Poland: a model of karyotype evolution

Sex chromosome meiotic drive in hybrid males of the common shrew [Sorex araneus]

Karyotypic variation of the common shrew Sorex araneus in Belarus, Estonia, Latvia, Lithuania and Ukraine

Genetic differentiation of commonn shrew Sorex araneus populations among different alpine valleys revealed by microsatellites

A hybrid zone between the chromosomal races Legucki Mlyn and Popielno of the common shrew in North-Eastern Poland: preliminary results

Chromosome races of the common shrew Sorex araneus in the Ural Mts: a link between Siberia and Scandinavia?

Mapping of five genes from human chromosome 17 to chromosome hn of the common shrew Sorex araneus

Morphometric variation between karyological categories of the common shrew [Sorex araneus] in the Legucki Mlyn-Popielno hybrid zone

Genetic differentiation and gene flow between the Drnholec and Legucki Mlyn chromosome races of the common shrew Sorex araneus in Northern Poland

New chromosome races of the common shrew Sorex araneus from Eastern Siberia