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1

Przypadki nietypowego ubarwienia rzęsorka rzeczka (Neomys fodiens Pennant, 1771) (Insectivora, Soricidae)

100%
Rachowiak P.
Przegląd Zoologiczny
|
1990
|
tom 34
|
nr 1
2

Description and phylogenetic relationships of Pojmanskatrema balcanica n. gen., n. sp. (Digenea: Dicrocoeliidae) from the Eurasian water shrew Neomys fodiens (Mammalia: Soricidae) in Bulgaria

100%
Hildebrand J., Tkach V. V.
Acta Parasitologica
|
2019
|
tom 64
|
nr 2
3

Variations in the hematological parameters of shrews

100%
Wolk E.
Acta Theriologica
|
1974
|
tom 19
|
nr 14-25
4

Differences in the microhabitat preferences of Neomys fodiens (Pennant 1771) and Neomys anomalus Cabrera, 1907 in Saxony, Germany

100%
Keckel M. R., Ansorge H., Stefen C.
Acta Theriologica
|
2014
|
tom 59
|
nr 4
The two semi-aquatic shrew species Neomys fodiens and Neomys anomalus are very similar in their ecology and morphology. Thus, they tend to be strong competitors for resources when they occur syntopically in habitats. We analysed the microhabitat selection of both species based on 14 parameters at two study sites in western Saxony (Germany). At the first study site, the results show segregation into different preferred microhabitats. In comparison to N. fodiens, N. anomalus occurred in low distance to the oxbow lake at places with denser herbal cover. Thus, we verified the hypothesis of Rychlik (Acta Theriologica 42:351-388 1997) who assumed differences in microhabitat niches for both shrew species to avoid competition. Furthermore, there was a spatial segregation within N. fodiens depending on their age. While adults occurred close to the water at areas with sparse herb layer, the juveniles and subadults were predominantly captured in some distance to the stream at denser vegetation. We assume that this is the result of different microhabitat preferences in N. fodiens depending on age and not a result of intraspecific antagonism. Moreover, the possibility to build subsurface burrows (and as an equivalent to this, crevice systems resulting of bank fixation with large stones) seems to be the main limiting factor for the occurrence of N. fodiens at the other surveyed site. At this site, no differences in microhabitats were visible between the age classes of N. fodiens.
5

Trypanosoma [Megatrypanum] ornata sp. n., a parasite of the Eurasian water shrew Neomys fodiens [Pennant, 1771]

100%
Karbowiak G., Wita I., Rychlik L.
Acta Protozoologica
|
2005
|
tom 44
|
nr 4
6

Effects of latitude and allopatry on body size variation in European water shrews

100%
Krystufek B., Quadracci A.
Acta Theriologica
|
2008
|
tom 53
|
nr 1
We studied the intra- and interspecific size variability of 271 water shrewsNeomys fodiens (Pennant, 1771) andN. anomalus Cabrera, 1907 from seven sample sites along a latitudinal transect from Bosnia and Herzegovina to Poland.Neomys anomalus was the only water shrew in three Dinaride karst fields, while it was sympatric with N.fodiens in remaining sites. The first principal component scores (PC1; 72.2% of variance explained), derived from principal components analysis of 13 cranial, mandibular and dental measurements, were used as the size factor. One-way ANOVA detected significant interpopulation variation in both species; intraspecific variation, however, was much more pronounced inN. anomalus. No latitudinal size pattern was found in N. fodiens (r = −0.42, p = 0.58), while mean PC1 scores correlated significantly and negatively with latitude inN. anomalus (r = −0.92, p = 0.004). Therefore, along a north to south transect,N. anomalus converged in size towards N. fodiens, which suggests that the former species occupies increasingly more aquatic habitats in the same direction. Individuals from allopatric populations ofN. anomalus from Slovenia and Bosnia and Herzegovina were, on average, larger than sympatric conspecific populations from the same latitudinal zone, which is consistent with the hypothesis of character displacement.
7

Aggressiveness of a Neomys fodiens parous female towards conspecific and N.anomalus intruders

100%
Krushinska N. L., Rychlik L.
Acta Theriologica
|
1994
|
tom 39
|
nr 3
Reactions of a Neomys fodiens (Pennant, 1771) parous female [FP] to 4 conspecific and 3 N. anomalus Cabrera, 1907 intruders were studied quantitatively in enclosure (135 x 135 cm) experiments. Total time of observations was 30 hr. FP initiated 5.6 intraspecific conflicts per 1 hr (1.95/hr of these were pouncings and fightings) with adult males, 0.8 conflicts/hr with a juvenile female, and 4.7 conflicts/hr with a N. ano­malus adult male. Reactions of N. fodiens parous female were several times more aggressive than interactions between non-breeding 'residents' and 'immigrants' of both water shrew species tested under the same conditions in earlier studies.
8

Agonistic interactions between resident and immigrant sympatric water shrews: Neomys fodiens and N.anomalus

100%
Krushinska N. L., Rychlik L., Pucek Z.
Acta Theriologica
|
1994
|
tom 39
|
nr 3
Behavioral mechanisms which control resident-immigrant relations in wild popula­tions of Neomys fodiens (Pennant, 1771) and N. anomalus Cabrera, 1907 were studied by quantitative analysis of agonistic interactions between animals inhabiting the enclosure for at least 1 week ('residents') and animals newly introduced ('immigrants'). Tested animals (46 N. fodiens and 24 N. anomalus) were observed in one- and two-species groups or pairs in enclosures of 275 x 135 or 135 x 135 cm built in a laboratory room. During 214 hours of direct observation, social behaviour and patterns of hiding place usage were registered. Individual occupation of the neat boxes, a great number of conflicts among/bdiens-'residents', and a targe number of conflicts between /bdiens-'immigrants' and -'residents' suggest that strong territorial competition in breeding females and strong competition for females in adult males occur between residents and immigrants of the wild N. /odtercs-populations. Group occupation of the nest boxes, a very low degree of aggressiveness among anoma/iis-'residents' and the tolerant interactions between anom.a/«s-'immigrants' and -'residents' suggest that, in wild populations, N. anomalus are gregarious and inhabit given areas in groups. The low number of interspecific conflicts between 'residents' suggests that in the two-spe­cies stabilized groups, behavioral mechanisms exist, which allow N. anomalus to avoid conflicts with the more aggressive N. fodiens. Since the number of conflicts between /bdiercs-'residents' and arioma/us-'immigrants' is much greater than between 'residents' of the two species, it seems that these mechanisms are active learning rather than simple habituation. The decrease in the number of interspecific conflicts within 1-3 days suggests high efficiency of these mechanisms.
9
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Życie w zimie - przypadek najmniejszych ssaków świata

80%
Bogdziewicz M.
Wszechświat
|
2012
|
tom 113
|
nr 01-03
10

Morphology and topography of the nuclei of the geniculate bodies in insectivores

80%
Galert D.
Folia Morphologica
|
1986
|
tom 45
|
nr 1
11

Live-trapping small mammals under snow: a protocol for maximising captures and minimising mortality

80%
Rychlik L., Churchffig.,ref.ield S., Taylor J. R. E., Kardynia P., Oldakowski L.
Polish Journal of Ecology
|
2012
|
tom 60
|
nr 3
Difficulties in investigating shrews in the wild in winter, especially in trapping them and keeping them alive during live-trapping studies, have been the main reason for serious deficiencies in our knowledge of their ecology. We developed a live-trapping protocol which allowed us to maximise capture rates and minimise mortality of shrews. We used wooden box traps with a nest-chamber, which we set in plywood ‘chimneys’ with removable roofs. Chimneys facilitated suitable positioning of traps and protected them from being blocked by snow. This resulted in a high trappability (up to 20.2 shrews and 8.2 voles per 1000 trap hours), a large proportion of recaptures (most shrews were recaptured, often repeatedly) and a very low mortality rate (<0.09 shrews and 0 rodents per 1000 trap hours) despite sub-zero temperatures and deep snow cover. This allowed us to pursue an intensive live-trapping study, using the CMR-method, of shrews wintering in the Narewka river valley (north-east Poland). Because of the high trappability and minimal mortality, the presented protocol can be recommended to study winter ecology and conservation biology of such fragile and strictly protected small mammals as shrews.
12

Rozmieszczenie ryjówkowatych Soricidae w polskich Tatrach

80%
Wazna A., Cichocki J., Mierczak Z., Piksa K., Zwijacz-Kozica T.
Chrońmy Przyrodę Ojczystą
|
2014
|
tom 70
|
nr 2
W pracy przedstawiono aktualne dane dotyczące występowania ryjówkowatych w Tatrach polskich i u ich podnóży. W latach 1993–2012 odnotowano na 124 stanowiskach 301 osobników należących do pięciu gatunków ryjówkowatych: ryjówki aksamitnej Sorex araneus, ryjówki malutkiej S. minutus, ryjówki alpejskiej S. alpinus, rzęsorka rzeczka Neomys fodiens i rzęsorka mniejszego N. anomalus. Najpospolitszym gatunkiem była ryjówka aksamitna, którą wykazano na 64 stanowiskach (208 osobników). Znacznie rzadziej stwierdzana była ryjówka malutka (34 stanowiska i 61 osobników) i ryjówka górska (19 osobników w 16 miejscach). Rzęsorek rzeczek (11 osobników) obserwowany był na ośmiu stanowiskach zlokalizowanych w sąsiedztwie górskich potoków. Tylko dwukrotnie u podnóża Tatr, przy wlocie Doliny Strążyskiej (885 m n.p.m.) i na Polanie Zazadniej (910 m) został stwierdzony rzęsorek mniejszy
13

Shrews Soricidae of the Silesian Beskid Mountains

80%
Myslajek R., Nowak S., Kurek K.
Fragmenta Faunistica
|
2009
|
tom 52
|
nr 1
During a study conducted in 2002–2008 the following 6 species of shrews were recorded in the Silesian Beskid Mts. (Western Carpathians, S Poland): Sorex araneus, S. minutus, S. alpinus, Neomys fodiens, N. anomalus and Crocidura suaveolens. The most widespread was S. araneus (63.4% of locations), followed by S. alpinus (13.4%), S. minutus (12.2%), N. fodiens (7.3%), N. anomalus (2.4%) and C. suaveolens (1.2%). Among dead shrews (n=47) S. araneus comprised 56.6%, S. minutus 21.7%, S. alpinus 10.9%, C. suaveolens 4.3%, N. anomalus 4.3% and N. fodiens 2.2%. During capture with live traps only S. araneus was recorded, constituting 2.5% of all small mammals captured. It was most frequently caught in deforested areas.
14

Two new hymenolepidid species [Cestoda, Hymenolepididae] from water shrews Neomys fodiens Pennant [Insectivora, Soricidae] in Bulgaria

80%
Vasileva G. P., Tkach V. V., Genov T.
Acta Parasitologica
|
2005
|
tom 50
|
nr 1
Two new hymenolepidid species, Coronacanthus magnihamatus sp. nov. and Triodontolepis boyanensis sp. nov. are described from the European water shrew, Neomys fodiens, in Bulgaria. The most important differentiating features of C. magnihamatus are the length of the rostellar hooks (26-28 um, mean 27 µm) and the thick-walled uterus, which does not form capsules in gravid proglottids. T. boyanensis is distinguished from other members in the genus by the number (16) and size (47-48 µm, mean 48 µm) of the rostellar hooks, the non-capsulate gravid uterus, containing relatively large number of eggs (35-70, mean 49) and the embryophore, possessing polar filaments. The types of uterine development in hymenolepidids of Neomys spp. are discussed.
15

Differences in foraging behaviour between water shrews: Neomys anomalus and Neomys fodiens

80%
Rychlik L.
Acta Theriologica
|
1997
|
tom 42
|
nr 4
The modes and efficiency of foraging in the terrestrial and aquatic habitats in water shrews Neomys anomalus Cabrera, 1907 and N. fodiens (Pennant, 1771) were compared in order to investigate if these species can avoid competition for food when they occur syntopically. Seven individuals of N. anomalus and five of N. fodiens, caught in the Białowieża Primeval Forest, were tested individually in the terrarium of size 3 x 0.5 m, containing a 0.25-m-wide 'stream' with flowing water of an average depth 25 cm. Six experimental variants, simulating different habitat conditions, were established. Each animal was tested in a given variant during 3 succeeding days for 6 h a day. In total, 738 h of shrews' behaviour were recorded in darkness using 2 infra-red sensitive video-cameras. Results obtained on four N. fodiens tested with similar methods (648 h; Ruthardt 1990) were included for comparison. N. anomalus swam and dived significantly shorter than N. fodiens, and they did not take food under water, even when there was no food on land. N. fodiens found and took food placed under water and foraged quite efficiently here. They found on average 17.7% of food portions placed under water in the most similar to natural conditions and 19.4% when there was no food on land. In both species foraging time on land was much longer than in water. The presence of natural structures increased duration and efficiency of foraging, but this influence was stronger in N. anomalus than in N. fodiens. These results and literature data suggest that in the wild: (1) both species forage in shallow water and in muddy grounds of wet habitats (wading foraging mode), and also in drier terrestrial habitats (epigeal and hypogeal foraging); (2) only N. fodiens forage in deep water (aquatic foraging); (3) the competition for food between N. anomalus and N. fodiens may be very weak, when potential aquatic prey are available.
16

Behavioural mechanisms of conflict avoidance among shrews

80%
Rychlik L., Zwolak R.
Acta Theriologica
|
2005
|
tom 50
|
nr 3
Stable co-existence of similar species should be facilitated by mechanisms impairing, besides exploitative, interference competition. We investigated avoidance of intra- and interspecific conflicts in a four-species community of shrews [Sorex minutus Linnaeus, 1766,S. araneus Linnaeus, 1758,Neomys anomalus Cabrera, 1907, andN. fodiens (Pennant, 1771)], using the method of dyadic encounters in a neutral arena. We tested whether the use of passive (habituation, reduction of mobility, increase of inter-individual distance, and stillness) and active (‘to-and-fro’ and ‘keeping distance’ behaviours) forms of conflict avoidance depends on species, size or domination rank. The duration of conflicts was positively correlated with mobility and negatively with inter-individual distance, whereas it was unrelated to time of stillness and the active forms. The repertoire of conflict avoidance mechanisms was not species-specific and the display of these mechanisms depended rather on the size and domination rank of animals participating in a given interaction. In contrast to rodents, shrews did not avoid conflicts by the most passive forms: freeze and stillness reactions. All other forms were used with a higher or lower efficiency by all species. However, consistent with our predictions, large shrews (asN. fodiens) used mainly the passive mechanisms of conflicts avoidance (‘wait-and-see’ strategy), whereas small shrews (asS. minutus) invest proportionally more time in active forms (‘escape’ strategy).
17

Overlap of temporal niches among four sympatric species of shrews

80%
Rychlik L.
Acta Theriologica
|
2005
|
tom 50
|
nr 2
Hypotheses about the dependence of circadian activity from metabolic rate and the segregation of temporal niches among competing species were verified by the study of activity patterns in a shrew community of two semiaquatic species,Neomys anomalus Cabrera, 1907 andN. fodiens (Pennant, 1771), and two terrestrial species,Sorex araneus Linnaeus, 1758 andS. minutus Linnaeus, 1766, co-existing in wet habitats of Białowieża Forest (E Poland). In ten trapping sessions, performed in early summer between 1991 and 2000, traps were open 24 hours continuously and patrolled at 1:00, 5:00, 10:00, 15:00, and 20:00. All the shrew species were most active between 20:00 and 1:00, and least active around mid-day (10:00–15:00). However, activity of the twoSorex species was lower than that of the twoNeomys species in the period 20:00–1:00, but higher in the period 15:00–20:00. BothNeomys species displayed clearly nocturnal, unimodal patterns of activity. In contrast, activity of bothSorex species was relatively evenly distributed over 24 hours and they increased their activity earlier (ie after 15:00) than bothNeomys species (after 20:00). These results confirm the idea that small shrew species with higher metabolic rate have more frequent and more equally distributed activity bouts than large species. Overlap of temporal niches was the highest within genera (99.29% between bothNeomys species and 98.36% between bothSorex species), the lowest betweenN. fodiens andS. araneus (88.26%) andS. minutus (89.34%), and intermediate betweenN. anomalus and bothSorex species (91.78 and 93.34%, respectively). Such high interspecific overlaps in activity suggest a joint-action of other mechanisms that separate ecological niches of these species also in other dimensions (eg food, microhabitat).
18

Small-mammal assemblages inhabiting Sphagnum peat bogs in various regions of Poland

71%
Ciechanowski M., Cichocki J., Wazna A., Pilacinska B.
Biological Letters
|
2012
|
tom 49
|
nr 2
19

Heavy metals concentrations in small mammals from Borecka Forest

71%
Sawicka-Kapusta K., Zakrzewska M., Kowalska A., Lenda B., Skrobacz M.
Archiwum Ochrony Środowiska
|
1995
|
nr 3-4
20

Rzesorki Neomys fodiens [Pennant] emituja ultradzwieki

70%
Harmata W.
Wszechświat
|
1995
|
tom 96
|
nr 01
23
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