Wyniki wyszukiwania

1

Social relations in family-groups of wood mice Apodemus sylvaticus under laboratory and enclosure conditions

100%

Zgrabczynska E., Pilacinska B.

Acta Theriologica

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2002

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tom 47

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nr 2

Two family-groups of wood mice Apodemus sylvaticus (Linnaeus, 1758) were observed: one in the laboratory (terrarium 100 x 60 x 60 cm) and the other under enclosure conditions (outdoor enclosure 200 x 100 x 100 cm). Three consecutive periods in the social relations of the family-groups were described: the linear hierarchy, the multidirectional social relations, and the variable dominance-subordination relations. The linear social hierarchy was reflected in the subordination behaviour of family members in relation to the dominant male, the father of the family. During the period of coexistence of a pair of parents with two litters of juveniles, both in the laboratory and under enclosure conditions, amicable relations between individuals occurred. Advanced forms of social care (paternal care, allomaternal lactation, transportation and licking by relatives) were also observed. In the laboratory, agonistic interactions were lacking during the linear hierarchy period, but the attainment of sexual maturity by individuals of the first two litters, accompanied by an increase in the number of mice, resulted in aggression between mature males and competition for dominance. Further, under increasingly crowded conditions, agonistic behaviour prevailed over other types of social interaction, and the survival rate of juveniles decreased. Under enclosure conditions a seasonal variation in agonistic interaction between mature individuals was recorded, similar to that observed in the wild. Despite the systematic increase in population density, no attacks by mature males on juveniles were observed.

2

B chromosomes in the wood mice [genus Apodemus]

100%

Zima J., Macholan M.

Acta Theriologica. Supplement

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1995

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nr 03

Spatial and temporal distribution of supernumerary or B chromosomes were studied in natural populations of wood mice. A total of 859 individuals belonging to several species from Eurasia were examined. A very high percentage of individuals possessing B chromosomes was found in Apodemus peninsulae (97.9%, n = 47), a high percentage in A. flavicollis (42.5%, n = 362), and a low one in A. syluaticus (2.4%, n = 210). No B chromosomes were observed in A. uralensis (n = 10), A. fulvipectus {n = 19), A. hermonensis (n = 1), A. agrarius (n = 58), A. mystacinus (n = 7), and in Apodemus species collected in Turkey (n = 74), Israel (n = 1), Azerbaijan (n = 2), Tadjikistan (n = 24), and Kyrghyzstan (n = 44). A modest to high frequency of B chromosomes was thus observed particularly in the species confined to a forest environment, whereas no B's were found in the species dwelling in open, steppe-like or rocky habitats. Both in A. peninsulae and A. flavicollis the frequency of B chromosomes varied among local populations. Follow-up studies revealed stability in the respective proportions of B chromosomes during subsequent years. However, no unambiguous interrelationship could be found between the frequency of B chromosomes and various biological and/or ecological variables. Therefore it seems that the incidence of B chromosomes is mainly determined by stochastic effects operating within the specific genetic background of a population.

3

Are baseline glucocorticoid levels linked to aggressive behaviour in wild wood mice?

84%

Hernandez M. C., Navarro-Castilla A., Pineiro A., Silvan G., Illera J. C., Barja I.

Polish Journal of Ecology

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2020

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tom 68

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nr 1

4

Morphometric, biochemical and molecular traits in Caucasian wood mice [Apodemus-Sylvaemus], with remarks on species divergence

84%

Hille A., Tarkhnishvili D., Meinig H., Hutterer R.

Acta Theriologica

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2002

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tom 47

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nr 4

We analysed Caucasian wood mice from Georgia (n = 60) and supplementary reference material of the Apodemus/Sylvaemus species group to evaluate the reliability of taxon identification. Traditional "expert knowledge" plus three different methodological approaches were employed and combined to perceive their discriminatory power for a reliable taxon assignment. Graphs of principal component scores derived from the analysis of 14 skull metrics displayed taxon membership of individuals. Individual multi-locus (L = 18) electrophoretic profiles were used to re-assess specimens to a specific genepool by an assignment test based on allele frequencies indicative of populational taxon samples of the respective sampling locations. Genotyped individuals were re-allocated to those taxa, for which they yielded the highest probability score. Genetic distances among the taxa were computed and clustered in a neighbour-joining tree. PCR-fragments of 1074bp amplified from the mitochondrial cytochrome b gene were cut with 2 six- and 4 four-cutter restriction enzymes, and resulting RFLP patterns were analysed phenetically to classify the specimens according to their molecular similarity. Partial cytochrome b sequences were used to construct a phylogenetic tree by computing neighbour-joining clusters from a matrix of percent nucleotide differences. The power of the combined classification approaches and their congruence is discussed. It is concluded that the joint application of traditional, morphometric and biochemical or genetic techniques for taxon allocation of specimens of wood mice encountered problems in species delimitation. The mtDNA topology obtained was not congruent with protein polymorphism that indicated differential historical and/or recent introgression and incomplete lineage sorting in substructured populations. Cytochrome b sequence DNA data analysed were not as adequate as expected to resolve phylogenetic relationships among Caucasian and European members of the Apodemus-Sylvaemus complex. Altogether, morphometric, biochemical and sequence data sets did not support the hypothesis of the evolutionary independence of European and Caucasian lineages of wood mice. Nonetheless, extended combined morphological and genetic analyses are considered necessary prerequisites to an in-depth study of the evolutionary lineages of the Apodemus/Sylvaemus group. More sequence data of a variety of genes (and plenty of nuclear markers) are needed to resolve the various levels of differentiation of the extant lineages.

5

Edge effects and patterns of winter abundance of wood mice Apodemus sylvaticus in Spanish fragmented forests

84%

Garcia F. J., Diaz M., De Alba J. M., Alonso C. L., Carbonell R., De Carrion M. L., Monedero C., Santos T.

Acta Theriologica

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1998

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tom 43

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nr 3

This paper analyzes the winter pattern of abundance of wood mice Apodemus sylvaticus (Linnaeus, 1758) as related to the distance from forest edges in two Spanish fragmented forests. Mouse abundance was measured by means of pitfall traps located at a range of distances from forest edges in large forests, in small woodiots, and in the agricultural matrix surrounding both woodiots and forests (both close to forest edges and far from them). Mouse abundances were larger in forests than in croplands, and tended to become larger in woodiots and forest edges as compared to forest interior, and close to woodland as compared to far from it in the croplands surrounding forests. Overall, wood mouse distribution appeared as clearly affected by edge effects, the species behaving as a typical ecotonic, soft-edge species, as expected by its generalist habitat selection behaviour. The implications of this pattern of winter distribution are discussed in relation to the well-documented increased abundances of wood mice in fragmented forests, as well as to the potential negative effects of wood mouse populations on forest species through predation and exploitative competition.

6

Juvenile dispersal in relation to adult densities in wood mice Apodemus sylvaticus

84%

Plesner J. S.

Acta Theriologica

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1996

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tom 41

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nr 2

Two alternative hypotheses explaining low densities of juvenile wood mice Apodemus sylvaticus (Linnaeus, 1758) early in the breeding season were compared: the Adult Aggression Hypothesis and the Habitat Saturation Hypothesis. They predict different ratios between adult and juvenile densities, which were tested using trapping data from mixed deciduous woodland and from lowland arable field margins. According to the Adult Aggression Hypothesis, juveniles have a poor persistence rate early in the breeding season as a result of aggressive behaviour shown by the adults. As the breeding season progresses, a drop in adult aggression levels results in increased juvenile persistence, which, in turn, leads to increased densities. The Habitat Saturation Hypothesis proposes that juveniles disperse from their parents' territories until the surrounding habitats are saturated and that this gradual saturation results in increased densities as the breeding season progresses. The observed correlations between adult and juvenile densities both in woodland and on field margins were consistent with the predictions of the Habitat Saturation Hypothesis.

7

Ecological distribution of bank voles and wood mice in disturbed habitats: preliminary results

84%

Douglass R. J., Douglass K. S., Rossi L.

Acta Theriologica

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1992

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tom 37

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nr 4

The ceological distribution of bank voles Clethrionomys glareolus (Schreber, 1780) and wood mice Apodemus sylvaticus (Linnaeus, 1758) was studied over one breeding season in the Maritime Alps of Italy. These species are found in habitats that are continuously disturbed by domestic livestock grazing as well as habitats unattainable by livestock. Average numbers per 50 live traps of these two species were similar (7.1 bonk voles/habitat/month and 7.9 wood mice/habitat/mnnth) but they were distributed differently among six habitats (niche overlap = 0.33). Within habitats, bank voles preferred features associated with forests while wood mice preferred features associated with open habitats. Populations of the two species behaved demographically differently from each oLhcr. Bank voles exhibited more stable populations with a narrower ecological amplitude (B = 2.8) but persisted in more habitats than wood mice. Wood mouse populations were less stable but had a broader ecological amplitude (B = 3.8) than bank voles. Bank voles and wood mice apparently survive equally well under continuous disturbance but they do so demographically differently and in different habitats.

8

Hepatic parasitosis in two wood mice, Apodemus sylvaticus (Rodentia: Muridae), due to Aonchotheca annulosa (Nematoda: Trichuridae), and Eucoleus bacillatus (Nematoda: Trichuridae). Erratic parasitism or post mortem migration?

67%

Debenedetti A. L., Saez-Duran S., Sainz-Elipe S., Galan-Puchades M. T., Fuentes M. V.

Acta Parasitologica

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2014

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tom 59

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nr 4

Aonchotheca annulosa and Eucoleus bacillatus are two capillariin nematodes parasitizing the intestinal and stomach mucosa, respectively, of various rodent species, and two, among others, component species of the helminth fauna of the wood mouse, Apodemus sylvaticus. A capillariin each was found in the liver parenchyma of two wood mice in a post-fire regeneration enclave in Serra Calderona Natural Park (Valencian Community, Spain). Due to their location, the preliminary identification of the helminths corresponded to Calodium hepaticum, a hepatic capillariin with rodents as its main host. So far, this species had never been found in Serra Calderona. To verify the preliminary identification, a comparative morphometric study between the specimens from Serra Calderona and a preserved individual of C. hepaticum from another enclave was carried out. Morphometric analysis revealed that the adult helminth as well as the eggs found in the liver of the first mouse belonged to A. annulosa, whereas the second one was identified as a male E. bacillatus. Moreover, the liver from both hosts showed a visible pathology, being the consequence of aberrant migration of the parasites. This is the first evidence that A. annulosa and E. bacillatus may migrate erratically and thus produce ectopic foci in other organs.

9

Ecological study of the wood mouse helminth community in a burned Mediterranean ecosystem in regeneration five years after a wildfire

67%

Fuentes M. V., Sainz-Elipe S., Galan-Puchades M. T.

Acta Parasitologica

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2007

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tom 52

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nr 4

Parasites are used as biological tags in environmental impact studies. However, terrestrial systems in general and small mammals in particular are rarely considered in these ecological studies. Based on the effects of a wildfire which occurred in the Spanish Serra Calderona Natural Park — a typical Mediterranean ecosystem — the regeneration process of the wood mouse population and its helminth community is analysed. A total of 217 individuals of Apodemus sylvaticus were studied in a five year period, from the second to the fifth post-fire year: 152 mice originating from the burned area and 65 from the control — non-burned — area. The helminth community for both burned and non-burned areas as well as the effect of intrinsic (host age and sex) and extrinsic (site, period and season of capture) factors on helminth prevalences and abundances were analysed. Taking into account the most important results of this study, various aspects of the helminth community dynamics of the wood mouse are postulated as biological tags of the environmental impact of a wildfire, such as the changes in the frequency distribution of the helminth species, the higher diversity in the burned area, and the prevalences of helminth species having biological cycles directly affected by climatic conditions and the vegetal regeneration process. Consequently, the helminth species of A. sylvaticus should be considered suitable biological tags of environmental perturbations, such as a wildfire, and the wood mouse/helminth model can be applied to predict the consequences for helminth species in general.

10

The attractiveness of conspecific and interspecific odor for bank voles Clethrionomys glareolus

67%

Andrzejewski R., Babinska-Werka J., Liro A., Owadowska E., Szacki J.

Acta Theriologica

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1997

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tom 42

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nr 2

We investigated the reaction of bank voles Clethrionomys glareolus (Schreber, 1780) to odors of conspecific individuals and that of wood mice Apodemus sylvaticus (Linnaeus, 1758) in a mature forest in central Poland (52°20'N, 27°25'E). Our results show no difference in catching bank voles in traps using conspecific or wood mouse odors as bait.

Ograniczanie wyników

Social relations in family-groups of wood mice Apodemus sylvaticus under laboratory and enclosure conditions

B chromosomes in the wood mice [genus Apodemus]

Are baseline glucocorticoid levels linked to aggressive behaviour in wild wood mice?

Morphometric, biochemical and molecular traits in Caucasian wood mice [Apodemus-Sylvaemus], with remarks on species divergence

Edge effects and patterns of winter abundance of wood mice Apodemus sylvaticus in Spanish fragmented forests

Juvenile dispersal in relation to adult densities in wood mice Apodemus sylvaticus

Ecological distribution of bank voles and wood mice in disturbed habitats: preliminary results

Hepatic parasitosis in two wood mice, Apodemus sylvaticus (Rodentia: Muridae), due to Aonchotheca annulosa (Nematoda: Trichuridae), and Eucoleus bacillatus (Nematoda: Trichuridae). Erratic parasitism or post mortem migration?

Ecological study of the wood mouse helminth community in a burned Mediterranean ecosystem in regeneration five years after a wildfire

The attractiveness of conspecific and interspecific odor for bank voles Clethrionomys glareolus