2008 /39/2

ISSN: 0024-7774 (print), 1804-6460 (online)
Vedoucí redaktor: Benda Petr

Stav poznania rozšírenia sysľa pasienkového (Spermophilus citellus) na Slovensku v rokoch 1996 až 2008 [Current knowledge on the distribution of the European Ground Squirrel (Spermophilus citellus) in Slovakia in 1996–2008]

The paper summarises current knowledge on the distribution of the European ground squirrel in Slovakia gained by mapping of the species since 1996. We used literature data as well as unpublished information from other scientific projects (for example epidemiological) to map and detect the present…

Do European Ground Squirrels (Spermophilus citellus) in Austria adjust their life history to anthropogenic influence? [Odráží se vliv člověka na změnách biologie sysla obecného (Spermophilus citellus) v Rakousku?]

While the European ground squirrel in Austria is sometimes near to extinction in its natural habitat, aggregations in altered habitats often achieve exceptional densities. In an effort to clarify this phenomenon, we compared demographic and life-history variations of five focal populations exposed…

Distribution and status of the European Ground Squirrel (Spermophilus citellus) in Bulgaria [Rozšíření a stav populace sysla obecného (Spermophilus citellus) v Bulharsku]

The European ground squirrel (Spermophilus citellus) is an endangered species and typically inhabits steppes and open woodland of Central Europe and the Balkans. Knowledge about its distribution and status in the southern part of its range is scanty. Distribution of the species in Bulgaria over two…

Ecology and space use in a relict population of the European Ground Squirrel (Spermophilus citellus) at the north-western edge of its distribution range [Ekologie a prostorové uspořádání v reliktní populaci sysla obecného (Spermophilus citellus

The study is focused on demography and space use in an isolated population of European ground squirrel (Spermophilus citellus) living on the periphery of its distribution range. Data were collected during the three year period using standard mark-recapture method combined with frequent observations…

Distribution of the European Ground Squirrel (Spermophilus citellus) in the Czech Republic in 2002–2008 [Rozšíření sysla obecného (Spermophilus citellus) v České republice v letech 2002 až 2008]

In 2002–2008, occurrence of the European ground squirrel was recorded at or reported from 45 sites in the Czech Republic. However, only 35 sites were verified to host ground squirrel colonies in 2008. Most of the colonies (91%) were found in some kind of artificial habitat with high anthropogenic…

Does kinship affect the alarm call structure in the Yellow Ground Squirrel (Spermophilus fulvus)? [Ovlivňují příbuzenské vztahy strukturu varovných signálů sysla žlutého (Spermophilus fulvus)?]

While the closer vocal similarity between mothers and their offspring compared to other conspecifics has been reported in many mammals, e.g. whales, bats and primates, no evidence is available that vocalizations of closely related kin encode relatedness in rodents. In the yellow ground squirrel…

Body mass and timing of the active season in European Ground Squirrels (Spermophilus citellus) at high and low population density [Tělesná hmotnost a načasování období aktivity sysla obecného (Spermophilus citellus) při vysoké a nízké popula

In this study we compared timing of the active season and body mass in a colony of European ground squirrels (Spermophilus citellus) in years with high and low population density. Data were collected in a suburban area near Vienna, Austria, over a decade. Ground squirrels were live-trapped and…

Speckled Ground Squirrel (Spermophilus suslicus): current distribution, population dynamics and conservation [Současné rozšíření, populační dynamika a ochrana sysla perličkového (Spermophilus suslicus)]

The speckled ground squirrel, Spermophilus suslicus (Güldenstead, 1770) was formerly a widely distributed species in eastern Europe, and it was even considered a pest species. The distribution range of the speckled ground squirrel is now fragmented, most of its settlements are small and separated…

Home ranges of European Ground Squirrels (Spermophilus citellus) in two habitats exposed to different degrees of human impact [Domovské okrsky sysla obecného (Spermophilus citellus) ve dvou biotopech s odlišnou intenzitou antropogenního vliv

Because of habitat loss and alteration, European ground squirrel populations in Austria are increasingly restricted to isolated fragments, where, however, they can reach conspicuous densities. To investigate potential effects of habitat alteration and population density on space use, we…

Population density does not affect the alarm call characteristics in the Speckled Ground Squirrel (Spermophilus suslicus) [Populační hustota neovlivňuje vlastnosti varovných signálů sysla perličkového (Spermophilus suslicus)]

While the environmental effects on animal vocalizations have been studied in many birds, mammals and in particular in the ground-dwelling sciurids, the influence of social surrounding on the call structure is poorly understood. The main idea we test here is that in the animals using alarm calls to…