| first case of echinococcus multilocularis infection in a zoo-housed flying squirrel (pteromys volans orii). | a 33 month-old male flying squirrel kept in a zoo developed progressive dyspnea and died. macroscopically, the liver and lung were enlarged with numerous nodular vesicles. histologically, these organs were replaced by numerous collapsed vesicles demarcated by fibrous tissues. the cysts lined by a cellular, germinal layer contained numerous brood capsules with abundant production of well-developed protoscolices. protoscolices were about 80-100 μm in diameter, and had hooks being visible as refrac ... | 2013 | 23257604 |
| competitive exclusion within the predator community influences the distribution of a threatened prey species. | while much effort has been made to quantify how landscape composition influences the distribution of species, the possibility that geographical differences in species interactions might affect species distributions has received less attention. investigating a predator-prey setting in a boreal forest ecosystem, we empirically show that large-scale differences in the predator community structure and small-scale competitive exclusion among predators affect the local distribution of a threatened for ... | 2012 | 22928409 |
| trypanosoma (herpetosoma) kuseli sp. n. (protozoa: kinetoplastida) in siberian flying squirrels (pteromys volans). | all trypanosome species classified in the subgenus herpetosoma in sciurid hosts have been recorded from ground and tree squirrels to date, but not from any flying squirrels. we describe in this paper a novel trypanosome species, trypanosoma (herpetosoma) kuseli sp. n., from siberian flying squirrels (pteromys volans) imported from china, and compare it with t. (h.) otospermophili in richardson's ground squirrels (spermophilus richardsonii) and columbian ground squirrels (spermophilus columbianus ... | 2007 | 17334786 |
| multilevel landscape utilization of the siberian flying squirrel: scale effects on species habitat use. | animals use and select habitat at multiple hierarchical levels and at different spatial scales within each level. still, there is little knowledge on the scale effects at different spatial levels of species occupancy patterns. the objective of this study was to examine nonlinear effects and optimal-scale landscape characteristics that affect occupancy of the siberian flying squirrel, pteromys volans, in south- and mid-finland. we used presence-absence data (n = 10,032 plots of 9 ha) and novel ap ... | 2017 | 29075450 |
| pulsed food resources, but not forest cover, determine lifetime reproductive success in a forest-dwelling rodent. | the relative contributions of habitat and food availability on fitness may provide evidence for key habitat features needed to safeguard population persistence. however, defining habitat quality for a species can be a complex task, especially if knowledge on the relationship between individual performance and habitat quality is lacking. here, we determined the relative importance of the availability of suitable forest habitat, body mass and food from masting tree species on female lifetime repro ... | 2017 | 28636171 |
| role of breeding and natal movements in lifetime dispersal of a forest-dwelling rodent. | the lifetime movements of an individual determine the gene flow and invasion potential of the species. however, sex dependence of dispersal and selective pressures driving dispersal have gained much more attention than dispersal at different life and age stages. natal dispersal is more common than dispersal between breeding attempts, but breeding dispersal may be promoted by resource availability and competition. here, we utilize mark-recapture data on the nest-box population of siberian flying ... | 2017 | 28405284 |
| immigration ensures population survival in the siberian flying squirrel. | linking dispersal to population growth remains a challenging task and is a major knowledge gap, for example, for conservation management. we studied relative roles of different demographic rates behind population growth in siberian flying squirrels in two nest-box breeding populations in western finland. adults and offspring were captured and individually identifiable. we constructed an integrated population model, which estimated all relevant annual demographic rates (birth, local [apparent] su ... | 2017 | 28331593 |
| siberian flying squirrels do not anticipate future resource abundance. | one way to cope with irregularly occurring resources is to adjust reproduction according to the anticipated future resource availability. in support of this hypothesis, few rodent species have been observed to produce, after the first litter born in spring, summer litters in anticipation of autumn's seed mast. this kind of behaviour could eliminate or decrease the lag in population density normally present in consumer dynamics. we focus on possible anticipation of future food availability in sib ... | 2016 | 27842537 |
| erratum to: home-range use patterns and movements of the siberian flying squirrel in urban forests: effects of habitat composition and connectivity. | [this corrects the article doi: 10.1186/s40462-016-0071-z.]. | 2016 | 27087979 |
| home-range use patterns and movements of the siberian flying squirrel in urban forests: effects of habitat composition and connectivity. | urbanization causes modification, fragmentation and loss of native habitats. such landscape changes threaten many arboreal and gliding mammals by limiting their movements through treeless parts of a landscape and by making the landscape surrounding suitable habitat patches more inhospitable. here, we investigate the effects of landscape structure and habitat availability on the home-range use and movement patterns of the siberian flying squirrel (pteromys volans) at different spatial and tempora ... | 2016 | 26893904 |
| phylogeography of the siberian flying squirrel (pteromys volans l., 1785) and the history of the formation of the modern species range: new data. | | 2015 | 26163215 |
| complete mitochondrial genome of the eurasian flying squirrel pteromys volans (sciuromorpha, sciuridae) and revision of rodent phylogeny. | in this study, the complete mitochondrial genome of the eurasian flying squirrel pteromys volans (rodentia, sciuromorpha, sciuridae) was sequenced and characterized in detail. the entire mitochondrial genome of p. volans consisted of 16,513 bp and contained 13 protein-coding genes, 22 trna genes, two rrna genes, and two non-coding regions. its gene arrangement pattern was consistent with the mammalian ground pattern. the overall base composition and at contents were similar to those of other rod ... | 2013 | 23114915 |
| condition-dependent, phenotype-dependent and genetic-dependent factors in the natal dispersal of a solitary rodent. | 1. dispersal can be condition- and phenotype-dependent and related to individual genetic differences. few studies have addressed the relative importance of these factors on dispersal. we studied the factors behind philopatry and dispersal in juvenile siberian flying squirrels, pteromys volans l. 2. the dispersal distance and the distances explored before abandoning the natal nest were not related to any of the condition-dependent factors studied such as the area of high-quality habitat or the nu ... | 2010 | 20561101 |
| natal habitat-biased dispersal in the siberian flying squirrel. | theoretically, dispersers should target the habitat where prospects for fitness will be highest. aiming for a habitat similar to the natal area (natal habitat-biased dispersal) has been hypothesized as a probable rule of thumb for dispersers, but has received very little empirical support to date. we investigated similarities between natal and post-dispersal settlement sites with radio-collared siberian flying squirrels (pteromys volans l.). juveniles born in small patches and raised in nests cl ... | 2007 | 17567559 |
| habitat exploration and use in dispersing juvenile flying squirrels. | 1. variation in behaviours involved in habitat selection is important for several evolutionary and ecological processes. for example, habitat use during dispersal may differ from breeding habitat use, and for dispersers the scale of habitat familiarity is determined by exploratory behaviour. we studied habitat use and exploration of 56 radio-collared juvenile flying squirrels pteromys volans l. within natal home range and during dispersal, and compared habitat use between juveniles and 37 adults ... | 2006 | 17032376 |
| phylogeography of the russian flying squirrel (pteromys volans): implication of refugia theory in arboreal small mammal of eurasia. | a phylogeographical study of the russian (siberian) flying squirrel (pteromys volans) was carried out using the complete mitochondrial (mt) cytochrome b gene sequences with special reference to the refugia theory for the arboreal traits of this species. we examined 31 specimens from 24 localities, resulting in 28 haplotypes. one breeding specimen with a unique haplotype from hokkaido, japan was included in the phylogenetic analysis. there were three mtdna lineages: hokkaido, far eastern, and nor ... | 2005 | 15773945 |
| predation risk landscape modifies flying and red squirrel nest site occupancy independently of habitat amount. | habitat choice often entails trade-offs between food availability and predation risk. understanding the distribution of individuals in space thus requires that both habitat characteristics and predation risk are considered simultaneously. here, we studied the nest box use of two arboreal squirrels who share preferred habitat with their main predators. nocturnal ural owls (strix uralensis) decreased occurrence of night-active flying squirrels (pteromys volans) and diurnal goshawks (accipiter gent ... | 2018 | 29596438 |
| weather and biotic interactions as determinants of seasonal shifts in abundance measured through nest-box occupancy in the siberian flying squirrel. | it is much debated whether the direct effects of weather or biotic interactions determine species' responses to climate change. for example, an important biotic factor for herbivores in northern ecosystems is the availability of winter food. if the food availability changes because of the changing climate, it likely has major impact on the abundance of herbivores. to evaluate this, we need to know the relative roles of weather and biotic interactions, such as food availability and risk of predat ... | 2020 | 32879335 |
| home range estimates and habitat use of siberian flying squirrels in south korea. | conservation measures or management guidelines must be based on species' ecological data. the home range of the target species was studied to understand its spatial ecology, in order to protect it. the siberian flying squirrel is the only flying squirrel species present and is considered as a protected species in south korea. in this study, we investigated the home range, habitat use, and daily movement of siberian flying squirrels from february 2015 to june 2016 at mt. baekwoon, gangwon provinc ... | 2020 | 32784486 |
| body-size scaling is related to gut microbial diversity, metabolism and dietary niche of arboreal folivorous flying squirrels. | thermal homeostasis of mammals is constrained by body-size scaling. consequently, small mammals require considerable energy to maintain a high mass-specific metabolic rate (msmr) and sustain target body temperature. in association with gut microbiota, mammalian hosts acquire absorbable molecules and fulfill their metabolic requirements. our objective was to characterize gut microbes in wild mammals and relate those findings to host body-size scaling. two large (petaurista philippensis grandis an ... | 2020 | 32385374 |
| population fluctuations and spatial synchrony in an arboreal rodent. | climatic conditions, trophic links between species and dispersal may induce spatial synchrony in population fluctuations. spatial synchrony increases the extinction risk of populations and, thus, it is important to understand how synchrony-inducing mechanisms affect populations already threatened by habitat loss and climate change. for many species, it is unclear how population fluctuations vary over time and space, and what factors potentially drive this variation. in this study, we focus on fa ... | 2019 | 31667601 |
| hair cortisol concentration in siberian flying squirrels is unrelated to landscape and social factors. | intact ecosystems are being lost or modified worldwide, and many animal species are now forced to live in altered landscapes. a large amount of scientific studies have focused on understanding direct effects of habitat alterations on species occurrence, abundance, breeding success, and other life history aspects. much less attention has been placed on understanding how habitat alterations impact on the physiology of species, e.g., via elevated chronic stress when living in an altered landscape. ... | 2019 | 31144037 |
| variations in gut microbiota of siberian flying squirrels correspond to seasonal phenological changes in their hokkaido subarctic forest ecosystem. | gut microbial communities of animals are influenced by diet and seasonal weather changes. since foraging strategies of wild animals are affected by phenological changes, gut microbial communities would differ among seasons. however, interactions of plant-animal-microbiota with seasonal changes have not been well characterized. here, we surveyed gut microbial diversity of siberian flying squirrels (pteromys volans orii) from a natural forest in hokkaido during spring and summer of 2013 and 2014. ... | 2019 | 30411188 |
| fecal progesterone metabolites in postpartum siberian flying squirrels. | the siberian flying squirrel ( pteromys volans) produces up to two litters a year. to deliver second litters in breeding season, p. volans may have a postpartum estrus similarly to that of a variety of small mammals. if this were the case, females would have periods of elevated progesterone levels because of the formation of corpora lutea (cl) after postpartum ovulation. to test this hypothesis, fecal progesterone metabolite dynamics was investigated during lactation in this species using an enz ... | 2018 | 29517445 |