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Dissertations / Theses on the topic 'Flying squirrels'

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Published: 4 June 2021
Last updated: 4 March 2023

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1

Yu, Fahong. "Systematics and biogeography of flying squirrels in the eastern and the western Trans-Himalayas." Connect to this title online, 2002. http://purl.fcla.edu/fcla/etd/UFE0000621.

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2

Cotton, C. Laine. "Winter habitat use and activity patterns of northern flying squirrels in sub-boreal forests." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ62469.pdf.

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3

Daosavanh, SANAMXAY. "Systematic Study of Flying Squirrels (Mammalia, Sciuridae) in Lao PDR." Kyoto University, 2020. http://hdl.handle.net/2433/252971.

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4

Flaherty, Elizabeth A. "Using energetics and diet to predict the movements of northern flying squirrels (Glaucomys sabrinus) in the managed forests of southeast Alaska." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1799828911&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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5

Smith, Joseph Tyler. "Movement and gene flow of northern flying squirrels across an interstate highway." Thesis, Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/smith/SmithJ0511.pdf.

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Roads are a pervasive cause of habitat fragmentation around the world. Roads can present barriers to movement through direct mortality, behavioral avoidance, or by acting as an impassable physical object in the landscape. The barrier effect of roads has been demonstrated for species from multiple taxa. Species inhabiting the interior of forests may be particularly sensitive to roads because of their inability or disinclination to traverse gaps in forest cover. We combined telemetry and molecular genetic techniques to examine the effects of a high-speed, high-volume highway on the movement and population genetic structure of northern flying squirrels (Glaucomys sabrinus) in the Cascade Mountains of Washington, USA. During 2009 and 2010, we trapped and radio-tracked flying squirrels (n = 17) to gather data on movement within their home ranges and to detect movement across the highway. Additionally, we tested for effects of the highway on genetic variation in the study area using DNA extracted from cheek cells of 59 squirrels and genotyped at 11 microsatellite loci. Seven of the 17 radio-tracked squirrels crossed the highway at least once during their nightly movements. The width of the gap between forest edges across the highway appeared to negatively influence crossing rates and no crossings were observed at a site where the average gap width exceeded 80 meters. Genetic analysis provided no evidence that either geographic distance or the presence of the highway was associated with genetic differences between sites at the landscape scale. Results suggest that populations on either side of the highway are well connected demographically and genetically, and that connectivity can be maintained if gaps in forest canopy associated with the highway are kept to a width within the gliding range of flying squirrels.
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6

Cook, Melaney Birdsong. "Comparative Mitochondrial DNA Sequence Diversity in Isolated and Open Populations of Southern Flying Squirrels." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc2222/.

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Three populations of Southern flying squirrels were studied in the Ouachita Mountains of Arkansas to assess the impact of population subdivision-due to island formation--on the population genetics of Glaucomys volans. One island, one mainland, and one open population were investigated. A 367 nucleotide hypervariable region of mitochondrial DNA was sequenced in individuals from each population. Individuals and populations were compared to assess relatedness. Higher sequence diversity was detected in the open and island populations. One island individual shared characters with both the island and mainland populations. Results support the hypothesis that the mainland population may have reduced gene flow. Also, the island population may have been originally founded by at least two maternal lineages.
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7

Seto, Nickie Liu. "The Effects of Polyphenol Concentration on the Feeding Behavior of Japanese Giant Flying Squirrels." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/321939.

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8

Krishna, Murali C., Awadhesh Kumar, Om Prakash Tripathi, and John L. Koprowski. "Diversity, Distribution and Status of Gliding Squirrels in Protected and Non-protected Areas of the Eastern Himalayas in India." ASSOC TERIOLOGICA ITALIANA, 2016. http://hdl.handle.net/10150/625220.

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The tropical forests of South and Southeast Asia hold the highest gliding squirrel diversity but our knowledge of species diversity, ecology and major threats is limited. The present study was undertaken in Arunachal Pradesh, Northeast India between June 2011 and March 2015 to address the paucity of data available on gliding squirrels. Based on field and literature surveys, 14 species of gliding squirrels were detected in the state of Arunachal Pradesh. However, species such as Biswamoyopterus biswasi, which is reported as endemic to Namdapha National Park, were not detected. The high gliding squirrel diversity in this region could be related to a diversity of forest types and its location between the Himalayas and the Indomalayan region. Encounter rates with four different species revealed that Petaurista petaurista was most frequently detected in Namdapha National Park. Major threats include hunting for traditional medicine, cultural purposes or bushmeat, and habitat loss due to forest degradation caused by shifting cultivation. In addition, more intensive studies on population, ecology and conservation status are needed in order to design species and site specific conservation action plans in this region which represents the highest diversity of gliding squirrels globally.
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9

Diggins, Corinne Ashley. "Determining Habitat Associations of Virginia and Carolina Northern Flying Squirrels in the Appalachian Mountains from Bioacoustic and Telemetry Surveys." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82128.

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The Virginia northern flying squirrel (Glaucomys sabrinus fuscus) and the Carolina northern flying squirrel (G. s. coloratus) are geographically isolated subspecies of the northern flying squirrel found in montane conifer-northern hardwood forests the Appalachian Mountains of the eastern United States. Both subspecies were listed under the Endangered Species Act in 1985 as endangered, and accordingly, the Virginia northern flying squirrel and the Carolina northern flying squirrel are considered high conservation priorities by state and federal agencies. Although the listing prompted work to determine the broad distribution and habitat associations of both subspecies, numerous data gaps remain, particularly with regard to habitat management and development of efficient monitoring techniques. Regional interest in restoration of red spruce (Picea rubens) forests in the central and southern Appalachian Mountains, considered to be the flying squirrels' primary habitat, increases the importance of understanding habitat selection and managers' ability to detect squirrels at multiple spatial and temporal scales. I compared two novel survey techniques (ultrasonic acoustics and camera trapping) to a traditional technique (live trapping) to determine which method had higher probability of detection (POD) and lower latency to detection (LTD, number of survey nights to initial detection) of northern flying squirrels in the region. Both novel techniques performed better than the traditional techniques with higher POD and lower LTD. I found that ultrasonic acoustics and camera trapping had similar POD, whereas LTD was significantly lower with ultrasonic acoustics versus camera trapping. Additionally, the ability to distinguish between northern flying squirrels and the parapatric southern flying squirrel (G. volans) also is possible with ultrasonic acoustics, but not with camera trapping. This ultimately makes ultrasonic acoustics the most effective and efficient method to obtain detection/non-detection data. To better inform management decisions and activities (i.e., red spruce restoration), this method should be used in conjunction with existing traditional monitoring techniques that provide demographic data such as nest boxes. I assessed habitat selection of radio-collared Virginia and Carolina northern flying squirrels at multiple spatial scales with use-availability techniques. I analyzed field data from paired telemetry and random points and determined Virginia northern flying squirrels microhabitat (within-stand habitat) selection showed preference for conifer-dominant stands with deep organic horizons, a factor that might be directly linked to food (hypogeal fungi) availability. Similar to previous studies on the Virginia northern flying squirrel on the landscape- and stand-level using Euclidean distance based analysis, Carolina northern flying squirrels also selectively preferred montane conifer forests in greater proportion than their availability on the landscape. Additionally, Carolina northern flying squirrels did not select for or against northern hardwood forests regardless of availability on the landscape. Habitat preference of both subspecies indicates that red spruce restoration activities may be important for the persistence of Appalachian northern flying squirrels into an uncertain future, as anthropogenic climate change may cause further reduction of the quality and extent of high-elevation montane conifer forests in the region.
Ph. D.
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10

Terry, Tamara M. "Glaucomys sabrinus fuscus habitat and nest box use in West Virginia with management recommendations for Kumbrabow State Forest." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3782.

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Thesis (M.S.)--West Virginia University, 2004.
Title from document title page. Document formatted into pages; contains xi, 83 p. : ill. (some col.), col. maps. Includes abstract. Includes bibliographical references.
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11

Bourgeois, Maryse C. "An examination of two unconventional methods to assess resource use by two New Brunswick forest mammals the marten and the northern flying squirrel /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq22025.pdf.

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12

Selonen, Vesa. "Spacing behaviour of the Siberian flying squirrel : effects of landscape structure." Helsinki : University of Helsinki, 2002. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/selonen/.

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13

Hurme, E. (Eija). "Ecological knowledge towards sustainable forest management:habitat requirements of the Siberian flying squirrel in Finland." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514289392.

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Abstract Maintaining biodiversity in boreal forest landscapes in conjunction with forestry is a challenging task. This requires ecological understanding that is based on empirical research. In this thesis, I examined spatial and temporal occupancy patterns as well as predictability of the occurrence of the Siberian flying squirrel (Pteromys volans L.) in Finland. I used thematic maps which matched habitat requirements of the flying squirrel in forested landscapes and data on species presence and absence, which were gathered in suitable forest habitats. The results of this thesis provide applications for landscape management. First, the preferred habitat characteristics of the flying squirrel were linked to available forest data. In addition, some predictive habitat models could be used to estimate the distribution of the flying squirrel within a region. Second, based on a five year study the forests were classified as continuously occupied, continuously unoccupied and variable-occupancy patches. The dynamic occupancy pattern emphasizes the need for repeated surveys to also locate the seldom-used suitable habitats in a landscape. Third, a comparison of simulated future scenarios in long-term forest planning suggested that flying squirrel habitat might be maintained without considerable loss of timber in a landscape. Thus, a combination of ecological and economic goals in forestry planning is an encouraging alternative. Fourth, there were more polypore species in forests occupied by the flying squirrel. This suggests that conservation of the flying squirrel habitats would protect other naturally co-occurring species, and thus the flying squirrel could be assigned as an umbrella species in mature spruce-dominated forests. Based on these findings, I suggest that the flying squirrel could be used as one of the target species for forest management in boreal forest landscapes. Further research challenges are related to the examination of habitat thresholds and to the projection of future scenarios where ecological, economic and social aspects are combined to assist in complex decision making processes.
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14

Dunham, Loren N. "Habitat Use of the Southern Flying Squirrel (Glaucomys volans) in Bluff Forests of Southwestern Illinois." Thesis, Southern Illinois University at Edwardsville, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1583447.

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Increased agriculture and urbanization in southwestern Illinois have severely fragmented the forests of the region. Habitat fragmentation may cause lower species richness, population declines, or extirpation due to phenomena such as edge effects, inbreeding depression, and stochasticity. The effects of habitat fragmentation on suburban wildlife are poorly understood, especially for small mammals such as the Southern Flying Squirrel (Glaucomys volans). Flying squirrels are arboreal rodents whose presence in a forest is indicative of habitat quality, as this species prefers mature and relatively open forest stands. Flying squirrels can be found in the forested areas of the Southern Illinois University Edwardsville (SIUE) campus. Demographic features of this population and habitat use among forest patches were unknown. Artificial nest boxes were utilized to perform a mark-recapture study of the flying squirrel population as well as examine habitat use. Objectives were to obtain demographic information, and to create a predictive habitat model relating habitat characteristics to presence or absence of nest box materials using logistic regression. Study sites consisted of 145 randomized plots in three forest patches located within the SIUE campus, which were monitored November 2013 through October 2014. A model was generated for combined activity (nesting or feeding materials were present) at plots, which contained forest age, dominance of hard mast at a plot, tree density, topographic position, richness of the shrub layer, and the 90th percentile diameter at breast height. Habitat models were also generated for specified response variables of feeding material presence and nesting material presence. The top model for predicting feeding material presence in a nest box contained dominance of hard mast on a plot, richness of the shrub layer, and basal area of logs. The top model for predicting nesting material presence in a nest box contained the shrub layer stem count, roughness of the nest box tree bark, proximity to edge, cavity count, and the average hard mast dominance in the area surrounding the plot. Models tended to include characteristics regarding hard mast dominance and refugia, suggesting nest box use was influenced by avoidance of predation and food resource availability.

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15

Meyer, Robert Timothy. "The Trophic and Spatial Ecology of the Southern Flying Squirrel (Glaucomys volans) and Non-lethal Deterrent Methods." Thesis, Mississippi State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10792999.

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Southern flying squirrels (SFS; Glaucomys volans) are known kleptoparasites on the endangered red-cockaded woodpecker’s (RCW; Picoides borealis) cavities and cost land managers time and money to control, and the ecology of SFS in habitats managed for RCWs is poorly understood. This study is designed to obtain a better understanding of the general ecology of SFSs surrounding RCW habitat and provide possible non-lethal deterrent methods to prevent harmful interactions between SFSs and RCWs. Spatially-explicit capture-recapture showed generally higher SFS densities and habitat associations outside of RCW cluster partitions. Stable isotope analysis of SFS diets across Mississippi and Alabama revealed a narrow dietary breath relative to food items, thus habitat management may still be viable option to control SFSs. Lastly, investigation of odor deterrents resulted in the greatest avoidance of cavities containing gray rat snake (Pantherophis spiloides ) feces and warrants further investigation.

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16

Sparks, James Lincoln Jr. "Genetic Variability, Pathogen Susceptibility, Subspecies Identity and Conservation of the Endangered Northern Flying Squirrel (Glaucomys sabrinus) in Virginia." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1390.

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I examined the population genetic structure of three known subspecies of Glaucomys sabrinus from Appalachia, Washington State, and two previously unexamined populations from Mount Rogers National Recreation Area (MRNRA) in Southwestern Virginia. Mean FST (0.107) and an AMOVA (P G. sabrinus subspecies populations in the southern Appalachians are genetically differentiated. Glaucomys sabrinus at MRNRA were less inbred than expected. Gene flow, a consensus tree based on Nei's genetic distance, elevated heterozygosity and morphometric data suggest that the MRNRA G. sabrinus population is an intergrade of the two recognized Appalachian subspecies, G. s. fuscus and G. s. coloratus. I compared inbreeding and the level of parasite infestation in the two MRNRA populations of G. sabrinus and found that Whitetop Mountain (150 ha habitat) was more inbred than the population on Mount Rogers (400 ha habitat, P Strongyloides robustus were greater in the more fragmented Whitetop Mountain population, although the difference was not statistically significant (P= 0.278). A Mantel comparison of genetic diversity and parasite infestation among individuals did show a highly significant negative correlation (P G. sabrinus form a unique insular population with high genetic diversity that is nonetheless susceptible to increased inbreeding, and elevated parasitism caused by fragmentation. MRNRA G. sabrinus should retain endangered species status.
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17

Reunanen, P. (Pasi). "Landscape responses of the Siberian flying squirrel (Pteromys volans) in northern Finland:the effect of scale on habitat patterns and species incidence." Doctoral thesis, University of Oulu, 2001. http://urn.fi/urn:isbn:9514264967.

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Abstract Spatial structure of habitats has been found to affect the species abundance and distribution patterns in heterogeneous environments. In this thesis, I studied landscape responses of the Siberian flying squirrel in a boreal forest context in northern Finland. Studies were conducted at several spatial scales in order to identify landscape characteristics that are associated with the species occurrence at a local scale and its distribution patterns at a regional scale. Data on species presence and absence in forest areas were collected in the field. Habitat patterns in landscapes were analysed from satellite images and landscape metrics concerning landscape structure were quantified in Geographic Information Systems (GIS). Results of this study are in agreement with the general landscape ecological theory and findings in the field. In northern Finland, the distribution of the Siberian flying squirrel primarily follows the spatial extent of spruce-dominated forests but that its actual occurrence is dependent on the scale of observation and the habitat structure. At a home range scale the abundance of deciduous trees in old spruce forest increases the probability that a forest site is occupied by the species, whereas at a local scale the amount of such spruce forests and linkages between habitat patches play an important role. At a regional scale, an increase in open areas and the dominance of pine makes the habitat unsuitable and restricts the presence of the species. Findings of the present research forward practical forest management planning at a large scale and may help set general conservation goals for the Siberian flying squirrel. When managing the species in a complex network of habitat patches in heterogeneous landscapes, spatial dispersion of potential habitat patches as well as connecting habitat and their temporal development should be considered carefully. For this purpose, remote sensed images and GIS are valuable and useful tools. Satellite-image based landscape analysis is presently developing rapidly and hopefully this methodology will soon become a common practice in landscape ecological research and everyday forest management planning.
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18

Evans, Andrew Micheal. "Modeling the Distribution of the Northern Hardwood Forest Type in Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus) Recovery Areas of the Southern Appalachians." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/23269.

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The northern hardwood forest type is a critical habitat component for the endangered Carolina northern flying squirrel (CNFS; Glaucomys sabrinus coloratus) for denning sites and corridor habitats between montane conifer patches where the squirrel forages. This study examined terrain data, and patterns of occurrence for the northern hardwood forest type in the recovery areas of CNFS in western North Carolina and southwestern Virginia with the purpose of creating a more robust predictive model of this forest type for spatial delineation. I recorded overstory species composition as well as terrain variables at 338 points throughout the study area in order to quantitatively define the northern hardwood forest type. These data were used in conjunction with digital terrain data for creation of the predictive model. Terrain variables we examined to attempt to differentiate northern hardwoods from other forest types included elevation, aspect, slope gradient, curvature, and landform index. I used an information-theoretic approach to assess six models based on existing literature and a global model.  My results indicate that on a regional, multi-state scale, latitude, elevation, aspect, and landform index (LFI) of an area are significant predictors of the presence of the northern hardwood forest type in the southern Appalachians.  My model consisting of Elevation + LFI was the best approximating model based on lowest AICc score.  Our Elevation + LFI model correctly predicted northern hardwood presence at 78.2% of our sample points observed to be northern hardwoods. I then used this model to create a predictive map of the distribution of the northern hardwood forest type in CNFS recovery areas.
Master of Science
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19

Evans, Andrew M. "Modeling the Distribution of the Northern Hardwood Forest Type in Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus) Recovery Areas of the Southern Appalachians." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23269.

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The northern hardwood forest type is a critical habitat component for the endangered Carolina northern flying squirrel (CNFS; Glaucomys sabrinus coloratus) for denning sites and corridor habitats between montane conifer patches where the squirrel forages. This study examined terrain data, and patterns of occurrence for the northern hardwood forest type in the recovery areas of CNFS in western North Carolina and southwestern Virginia with the purpose of creating a more robust predictive model of this forest type for spatial delineation. I recorded overstory species composition as well as terrain variables at 338 points throughout the study area in order to quantitatively define the northern hardwood forest type. These data were used in conjunction with digital terrain data for creation of the predictive model. Terrain variables we examined to attempt to differentiate northern hardwoods from other forest types included elevation, aspect, slope gradient, curvature, and landform index. I used an information-theoretic approach to assess six models based on existing literature and a global model.  My results indicate that on a regional, multi-state scale, latitude, elevation, aspect, and landform index (LFI) of an area are significant predictors of the presence of the northern hardwood forest type in the southern Appalachians.  My model consisting of Elevation + LFI was the best approximating model based on lowest AICc score.  Our Elevation + LFI model correctly predicted northern hardwood presence at 78.2% of our sample points observed to be northern hardwoods. I then used this model to create a predictive map of the distribution of the northern hardwood forest type in CNFS recovery areas.
Master of Science
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20

Lampila, Satu. "The causes and consequences of population declines of two boreal forest species : the case of the willow tit (Parus montanus) and the Siberian flying squirrel (Pteromys volans) /." Oulu : Oulun Yliopisto, 2009. http://herkules.oulu.fi/isbn9789514290718.

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Lampila, S. (Satu). "The causes and consequences of population declines of two boreal forest species:the case of the willow tit (Parus montanus) and the Siberian flying squirrel (Pteromys volans)." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514290718.

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Abstract I used individual-based capture-mark-recapture data and genetic markers to gain understanding of the demographic and genetic processes operating in small and declining populations of two different species, the willow tit Parus montanus and the Siberian flying squirrel Pteromys volans. Both species have declined in Finland and the flying squirrel has been considered to be vulnerable. The willow tit study was conducted in northern Finland, near city of Oulu. The population size in the studied area has on average been stable during the past decade. Adult survival in the willow tit was high and fairly stable and was positively correlated with recruitment. Adult survival has been the most influential vital rate to the population growth rate. Local recruitment and immigration have high variation, inducing variation in the population growth rate. Female willow tits use extrapair copulations to maximise offspring heterozygosity. Heterozygous individuals are supposedly of higher quality than homozygous ones. I found weak negative association between individual homozygosity and recruitment probability. The flying squirrel populations have declined during the past ten years. Furthermore, adult survival has declined in one of the populations, most likely due to habitat loss and fragmentation that decrease the adult survival and limit dispersal. The flying squirrel populations were studied in western Finland. The flying squirrel densities in the studied areas are the highest in Finland and therefore these areas have been regarded as favourable for the flying squirrel. My results question this view. Microsatellite analyses strengthen the view of populations doing poorly, because the heterozygosities in all the populations and particularly in the most isolated one were rather low. High FST values indicate low dispersal even between adjacent populations. Following work should investigate the spatial variation in individual performance and the dispersal processes in these populations. For the flying squirrel it is vital to determine the size and quality of the patches that can support flying squirrels and the ones that apparently can not. Present estimates of survival and genetic diversity can be used to reconstruct a meaningful PVA and projections for these populations.
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Ransome, Douglas B. "Population ecology and resource limitation of northern flying squirrels and Douglas squirrels." Thesis, 2001. http://hdl.handle.net/2429/13790.

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Habitat preferences and population dynamics of northern flying squirrels (Glaucomys sabrinus) and Douglas squirrels (Tamiasciurus douglasii) were examined in old-growth and mature second-growth stands in British Columbia, Canada. Using mark-recapture techniques to estimate population dynamics, I tested the hypothesis that old-growth stands provided higher quality habitat than second-growth stands for these species. Populations were monitored in two old-growth and two mature second-growth stands from August 1995 to May 1999. There were no differences in movement, density, recruitment, weight of males, survival, percentage of the population breeding, and the duration that individuals remained on the study plots between stand types for G. sabrinus. Similarly, with the exception of recruitment, there were no differences in these parameters between stand types for T. douglasii. Recruitment of T. douglasii was higher in second-growth than old-growth stands. Old-growth stands were not higher-quality habitat than second-growth stands for either species for the period of enquiry and the parameters I measured. Population dynamics of G. sabrinus and T. douglasii were also examined in thinned and unthinned stands. I tested the hypothesis that unthinned stands provided higher-quality habitat than thinned stands for these species. Populations were monitored using mark-recapture techniques on two thinned and two unthinned stand from August 1995 to May 1999. Commercial thinning was initiated 9 and 7 months following the first trap session. There were no differences in movement, density, recruitment, weight of males, survival, percentage of males breeding, and the duration that individuals remained in thinned and unthinned stands for G. sabrinus and T. douglasii. Unthinned stands were not higher-quality habitat than commercially-thinned stands for either species for the period o f enquiry and the parameters I measured. Finally, effects of food and den site supplementation on the population dynamics of G. sabrinus and T. douglasii were examined in mature second-growth stands in British Columbia, Canada. I tested the hypothesis that populations of these squirrels were limited primarily by abundance of food, not den sites. The experimental design included a randomized complete block design with three replicates and four treatments (food supplementation, food and nest box supplementation, nest box supplementation, and control). Populations were sampled intensively from June 1996 to March 1999. There were no differences in movement, density, recruitment, weight of males, percentage of males breeding, and the duration that individuals remained on the grids among treatments for G. sabrinus and T. douglasii. However, survival of G. sabrinus decreased significantly from pre- to post-treatment periods in stands without food supplementation. When food was added, survival increased significantly or remained unchanged. In addition, occupancy rate of nest boxes in stands supplemented with nest boxes and food was 6- to 12- times higher (1998 - 88.4%, 1999 - 75.0%) than in stands with nest boxes only (1998 - 7.0%, 1999 - 12.2%o). G. sabrinus occupied the majority of the nest boxes. Nest boxes in stands supplemented with food primarily contained covered nests (76.5%) while beds dominated (68.3%) those in stands supplemented with nest boxes only. I concluded that G. sabrinus readily used nest boxes but their populations were not limited by the availability of den sites; availability of food appeared to limit their populations. Populations of T. douglasii were not limited by the availability of food or den sites during my study.
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Ransome, Douglas Bruce. "Food limitation and habitat preference of northern flying squirrels and red squirrels." Thesis, 1994. http://hdl.handle.net/2429/5097.

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Food limitation and habitat preference of northern flying squirrels (Glaucomys sabrinus) and red squirrels (Tamiasciurus hudsonicus) were examined in the Montane Spruce (MSdm2) and Engelmann-Spruce-Subalpine-Fir (ESSFdc2) (transition area) biogeoclimatic zones (Meidinger and Pojar 1991) in the south-central interior of British Columbia. I tested the hypotheses that: 1) flying squirrel and red squirrel populations are limited by food availability, 2) flying squirrel abundance is positively related to the abundance of cavities for nesting and, 3) second-growth stands are sub-optimal habitat for flying squirrels and red squirrels. Populations were monitored on 6 study areas; 2 second-growth lodgepole pine stands (controls), 2 second-growth stands with food supplementation (treatments: 25-ha blocks with sunflower seeds aerially applied for 3 summers, starting in June 1991), and 2 old-growth lodgepole pine stands. Northern flying squirrel and red squirrel populations were examined for two summers, starting June in 1992. From hypothesis 1, I predicted that population size, proportion of adults breeding, body weight, recruitment, and survival would be higher in treatment stands that received supplemental feeding than in control stands. Treatment stands had significantly more flying squirrels than control stands (P < 0.00 1). Average densities of flying squirrels were twice as high in treatment stands (1.38 and 1.50 squirrels/ha) than control stands (0.64 and 0.68 squirrels/ha). In 1992, the abundance of red squirrels was not significantly different between control and treatment stands (P = 0.74). In 1993, treatment stands had significantly more red squirrels (P = 0.008) than control stands. The average weight of adult males, survival rates, and the proportions of female and male flying squirrels, and male red squirrels in breeding condition were not significantly different in control and treatment stands. The proportion of female red squirrels in breeding condition was significantly higher in control than treatment stands. Consequently, population size of flying squirrels and red squirrels appeared to be limited by food availability, but individual squirrels did not appear to benefit from food supplementation. An intensive survey of cavities, coupled with subsequent cavity checks, indicated that flying squirrels did not require cavities and their population size was not limited by the availability of cavities. These results do not support the hypothesis that flying squirrel abundance is positively related to the abundance of cavities. Population size of flying squirrels, body weight, recruitment, and survival of flying squirrels and red squirrels were not significantly different in second-growth and old-growth stands. Population sizes for red squirrels were significantly higher in second-growth than old growth stands. There was no consistent difference in the proportion of squirrels in breeding condition between second-growth and old-growth stands. These results do not support the hypothesis that second-growth stands are sub-optimal habitat for northern flying squirrels and red squirrels.
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Martin, Karl J. "Movements and habitat asociations of northern flying squirrels in the Central Oregon Cascades /." 1994. http://hdl.handle.net/1957/9201.

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25

Rosenberg, Daniel K. "Characteristics of northern flying squirrel and Townsend's chipmunk populations in second -and old-growth forests." Thesis, 1990. http://hdl.handle.net/1957/37825.

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26

Smith, Jaya Rupa. "Spatial organization, habitat preference, and management of northern flying squirrels, Glaucomys sabrinus, in the northern Sierra Nevada." Diss., 2009. http://proquest.umi.com/pqdweb?did=1987414101&sid=1&Fmt=2&clientId=48051&RQT=309&VName=PQD.

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27

Anderson, Janice. "The relationship between the production of hypogeous sporocarps and the denisity and diet of northern flying squirrels in western hemlock forests of coastal British columbia." Thesis, 2003. http://hdl.handle.net/2429/14989.

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The northern flying squirrel, Glaucomys sabrinus (Shaw), is an arboreal sciurid inhabiting forested habitats across North America. Hypogeous fruit bodies of mycorrhizal fungi (truffles) are a predominant food eaten by northern flying squirrels. Previous studies have suggested that the abundance of truffles in a stand may be an important factor associated with the density of northern flying squirrels. Over a twoyear period, five second-growth western hemlock (Tsuga heterophylla (Raf). Sarg.) forests in coastal British Columbia were used year-round to sample truffles and to live trap northern flying squirrels, in order to: (1) describe the occurrence and production of truffles; (2) determine the importance of truffles in the seasonal diet of squirrels; (3) identify which truffle taxa were selectively consumed by this species; and 4) evaluate associations between the density of northern flying squirrels and the production of truffles. Truffle production from each site was determined using results from the primary collection period, which included four samples at 10-week intervals from April 1998 to December 1998. Eleven species representing six genera of truffles were collected, with Elaphomyces making up over 9 3% of the total number and 99% of the total biomass. Truffle production at each site during the primary collection period ranged from 1.68 kg ha⁻¹ year⁻¹ to 15.72 kg ha⁻¹ year⁻¹. Plant material was a major year-round component of the diet of northern flying squirrels, suggesting a more generalist feeding strategy than reported elsewhere. Truffle spores were most frequent in the summer and fall diets. Nine additional truffle taxa were present in squirrel diets than were collected in the field. Northern flying squirrels consumed on average 1.9 times more truffle taxa than were found during concurrent fungal surveys. The fungi genera Elaphomyces and Hydnotrya were under-represented and several taxa were over-represented in squirrel feces relative to their abundance at the site. Densities of flying squirrels could not be explained by truffle production alone at the five sites. Efforts to enhance populations of northern flying squirrels to improve foraging habitat for the endangered northern spotted owl (Strix occidentalis caurina Merriam) should consider measures that affect a broad array of food items and that enhance diversity as well as abundance of food supply.
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28

(9191999), Ashley L. Archer. "Habitat Associations Between the Northern Flying Squirrel and Red Spruce." Thesis, 2020.

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Red spruce forests, one of the most critically endangered ecosystems in the United States

provides critical habitat for several endemic species or subspecies of the Appalachian Mountains, including the Virginia northern flying squirrel. Once listed as threatened under the Endangered Species Act, the Virginia northern flying squirrel was delisted in 2013. Managers are currently focusing their efforts on projects that increase the extent and connectivity of the squirrel’s habitat through red spruce restoration. At present, there is a paucity of available data to assess the implications of the silvicultural activities associated with red spruce restoration on the movement and occupancy of the Virginia northern flying squirrel. In order to inform management activities, I measured home range, fine-scale habitat use, and estimated detection and occupancy for northern flying squirrels across a gradient of red spruce stands in the Monongahela National Forest. I concluded that home ranges for northern flying squirrels within this region are comprised primarily of red spruce and that northern flying squirrels were selecting larger diameter trees compared to the nearest available neighbor. Additionally, I found that microhabitat characteristics alone did not sufficiently predict northern flying squirrel occupancy and that acoustic methods for surveying northern flying squirrels will require further refinement. Future research efforts should focus on a combination of landscape-level and microhabitat covariates to best predict occupancy of this species across the landscape. Future red spruce management should be approached with caution regarding the potential impact on northern flying squirrel habitat in the short-term. I recommended using spatially-explicit modeling to assess the long-term effects of proposed red spruce restoration projects on northern flying squirrel population demographics, dispersal, and metapopulation connectivity prior to the implementation of silvicultural treatments.
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29

Wheatley, Matthew Thompson. "Ecological scale and species-habitat modeling: studies on the Northern flying squirrel." Thesis, 2010. http://hdl.handle.net/1828/3651.

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Although scale is consistently identified as the central problem in ecology, empirical examinations of its importance in ecological research are rare and fundamental concepts remain either largely misunderstood or incorrectly applied. Due to the mobile and wide-ranging nature of wildlife populations, species-habitat modeling is a field in which much proliferation of multi-scale studies has occurred, and thus provides a good arena within which to test both scale theory and its application. Insufficient examination of a relevant breadth of the scale continuum could be an important constraint in all multi-scale investigations, limiting our understanding of scalar concepts overall. Here I examine several concepts of ecological scale by studying free-ranging populations of northern flying squirrels (Glaucomys sabrinus), purported to be a keystone species in northern forests. Coarse-grain digital forest coverage revealed that flying squirrels in the boreal and foothills of Alberta were not conifer specialists, rather forest generalists regarding stand type and age. Lack of coarse-grain scale effects led me to examine fine-grain data, including an assessment of scale domains using a novel continuum approach. Fine-grain data revealed important scale-related biases of trapping versus telemetry, namely that, at fine-grain scales, different habitat associations could be generated from the same data set based on methods alone. Then, focusing on spatial extent, I develop a true multi-scalar approach examining scale domains. First, I quantify only forest attributes across multiple extents, and demonstrate unpredictable scale effects on independent variables often used in species-habitat models. Second, including both independent (habitat) and dependent (squirrel telemetry) variables in the same approach, I demonstrate that the relative ranking and strength-of-evidence among different species-habitat models change based on scale, and this effect is different between genders and among life-history stage (i.e., males, females, and dispersing juveniles). I term this the “continuum approach”, the results of which question the validity of many published species-habitat models. Lastly, I attempt to clarify why existing models should be scrutinized by reviewing common rationales used in scale choice (almost always arbitrary), outlining differences between “observational scale” and the commonly cited “orders of resource selection”, and making a clear distinction between multi-scale versus multi-design ecological studies.
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30

Lan, Yi-Feng, and 藍一逢. "Analysis of Insertion Sequences in a Cecal Prokaryotic Metagenome of a Flying Squirrel." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/79067578988759514178.

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31

Shen, Pei-shan, and 沈霈珊. "Acoustic Behavior of White-faced Flying Squirrel (Petaurista lena) in Guanghua Village, Alishan." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/81041653014731140991.

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碩士
國立中山大學
生物科學系研究所
101
Olfactory or vocal communication is usually more important than visual communication in exchanging information for nocturnal animals. The white-faced flying squirrel (Petaurista lena) is a nocturnal animal and frequently use calls to communicate. However, the relationship between their calls and behavior is not clear. The goals of this study were to describe their calls produced by the white-faced flying squirrel, understand the calling pattern and infer their functions by combining the data collected by call recording and context observation. The field works was conducted in a secondary broad-leaved forest in Guanghua Village, Chiayi County from March 2012 to February 2013. Their calls and accompanied behavior were recorded for two nights per month. The results showed that they called most frequently during 7-9 pm and 3-5 am. The calls were divided into four call types based on their acoustic characteristics. Some call types were associated with one or two contexts more frequency than the other. However, the calls have different functions, namely alarm, affiliative interaction and agonistic interaction. The call rates of call type A and B were significantly higher in reproductive season than non-reproductive season. The call type A were not significantly different between male and female but different among some individuals which possibly due to their low degree of sociality.
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CHI-CHIEN, KUO, and 郭奇芊. "Diet, Home Range and Activity Pattern of Red-Giant Flying Squirrel(Petaurista petaurista) in Fushan Experimental Forest." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/91573189809544553000.

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33

Chen, Hsueh-Chen, and 陳雪溱. "Roost Characteristics and Temperature Buffering of Female Red-Giant Flying Squirrel (Petaurista philippensis) in Fushan Experimental Forest." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/30340913389607371596.

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碩士
國立臺灣大學
生態學與演化生物學研究所
103
To examine whether roost characteristics affect temperature in roosts and roost preference or fidelity of female Petaurista philippensis, we measured the characteristics and temperature inside and outside of roosts of P. philippensis, and monitored roosts utilizing frequency and home range of adult females at difference reproductive stages by observation and radio tracking at Fushan Research Center. We radio-tracked 5 female adults and found 89 roosts during July 2011 to April 2013. Results of this study indicated that the average home range of these females is 0.96 ± 0.13 ha. The percentage of home range overlap between these females was very low, and roosts utilizing was distinct. Female P. philippensis showed preference to roosts with low canopy cover in winter, large volume and small entrance as maternity roosts. They also showed preference and higher fidelity to roosts with better temperature buffering capacity. In addition, roost with large volume showed higher minimum temperature, average temperature in summer and daily temperature range in winter. It suggests that female P. philippensis prefer specific roost characteristics which are related to better temperature buffering capacity. The temperature buffering capacity of roost partly explained the preference and fidelity for roost characteristics for female P. philippensis. However, there may be other non-temperature factors affecting roost preference and fidelity of female P. philippensis.
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34

Lin, Chih-Kang, and 林致綱. "Home range and nest use of Indian giant flying squirrel (Petaurista philippensis grandis) in the Wufeng area of Taichung." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/79524610868306512082.

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碩士
國立臺灣師範大學
生命科學研究所
100
Indian giant flying squirrel Petaurista philippensis grandis is the well-known and the most studied flying squirrel in Taiwan. However, there are few studies about behavior and ecological habitat of this species in lowland Taiwan. In this study, we investigated the behavior of this species in lowland to know its home range , nest use, and breeding performance. We set up 112 nest boxes at orchard, betel-nut palm, and plantation in Wufeng Taichung. Nineteen flying squirrels were captured in nest box between 2010 and 2011. Twelve male and 5 female squirrels were tagged with radio transmitter for tracking. The results show that mean monthly home range size of male (15.90±3.17 ha, 95%MCP, n=7) is larger than female (7.60±1.98 ha, 95%MCP, n=3; p= 0.0538, Mann–Whitney U test). Home range size of flying squirrels overlap between sexes, males, and females, and the overlapped area almost locate at the nest boxes region that female breed there. Six types of nest are used by flying squirrels, including tree cavity, nest box, and rock cave of “cavity type nest” and drey, vine nest, and palm nest of “external type nest”. Occupancy ratio of nest box in females (53.33%) is higher than that in males (21.63%). And females occupied more number of nest boxes than males (male=5.25, female=11.25). On the contrary, males occupied more number of other type nests than females (male=10.5, female=4.5, p= 0.932, Mann–Whitney U test). Otherwise, females occupied more number of cavity type nest than males (p=0.508, Mann–Whitney U test). The high probability of nest boxes occupancy by females might be due to the breeding need of females to care for their young in a safer nesting site. And nest boxes may meet the criteria because they are relatively weatherproof in comparison with other nest types.
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35

Chung, Tang I., and 唐一中. "The Effect of Brown Wood Owl and Tawny Owl Playback on the Calling Behaviour of White-Faced Flying Squirrel." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/14852151566897386721.

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碩士
國立屏東科技大學
野生動物保育研究所
92
This research is to figure out the effect of the calls of brown wood owls (Strix leptogrammica) and tawny owls (Strix aluco) to the calling reaction of flying squirrels. From January 2003 to April 2004, I accustomed myself to different calls of flying squirrels in the field of Wu-Ling Farm in Shei-Pa National Park, and then recorded flying squirrel species and their call types heard along Road 7th, 8th and 14th across different altitudes. Based on the playback of two kinds of brown wood owls’ calls and one of tawny owls’, I tested the effect of them to white-faced flying squirrels’ (Petaurista alborufus) calling behaviours. In the result were 4 number by times of brown wood owls at medium altitude, 40 of tawny owls at medium and high altitude. I also recorded 25 number by times of red-giant flying squirrels’ (Petaurista petaurista) calls at low altitude and 56 at medium altitude. Their main vocal type is 「En…」 at low, accounting to 64％ but 「Shi…」 at medium, accounting to 63％. Besides, I recorded 787 number by times of white-faced flying squirrels distributed at altitude from 100 m to 3200 m. They mainly made the sound「Fi－」. It is over 79%. In my study, the playback showed significant effect to tawny owls (P＜0.05) but not to brown wood owls. It might be resulted from the greater difficulty to attract brown wood owls who have wider home range than tawny owls. At medium altitude where brown wood owls were active, there was no significant difference in the effect of both white-faced flying squirrels’ calling behaviours after the playback of brown wood owl’s calls (P＞0.05). It might be for the distance and the high percentage of flying squirrels situated at up slope. At high altitude where brown wood owls were not active, its’ call 「Hu˙Hu˙Hu˙Hu－」 made no difference to the white-faced flying squirrels’ calling frequency（P＞0.05）, but the other call「Wow－」decreased the times of flying squirrels’ calls 「Fi－」（P＜0.05）. It might be caused by the higher percentage of flying squirrels at high altitude situated at down slope and the high frequency voice「Wow－」. It can be inferred further that the defence behaviour of white-faced flying squirrels to brown wood owls at high altitude was affected by the combination of distance and seasonal vertical migration. Besides, after the playback of tawny owls’ calls, flying squirrels'' behaviour did not change (P＞0.05), which I supposed to be related to the size and food option of tawny owls.
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36

Holloway, Gillian Lynn. "Flying squirrel (glaucomys sabrinus and G. volans) habitat use and ecology in landscapes managed with partial harvesting silviculture in central Ontario /." 2006. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=442448&T=F.

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37

Lu, Hsiao-Pei, and 呂曉沛. "Using metagenomic and metatranscriptomic approaches to study the composition and function of the gut microbiota in the leaf-eating flying squirrel (Petaurista alborufus lena)." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/71088706797950599541.

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博士
國立臺灣大學
動物學研究所
101
White-faced flying squirrels (Petaurista alborufus lena) inhabiting in subtropical forests of Taiwan, feed on leaves of diverse tree species. The predominant feature of their gastrointestinal tracts is an enlarged cecum that serves as an anaerobic container for microbial fermentation. Symbiotic gut microorganisms providing metabolic activities lacking in the host, are essential for energy extraction from the nutritionally poor diet. Although the importance of gut microbiota has been well demonstrated in humans and lab mice, there is a paucity of knowledge regarding gut microbial constituents and their functional capabilities in wild animals. Therefore, in this research, we applied culture-independent molecular tools and high-throughput sequencing techniques to provide the comprehensive understanding of the gut microbial communities in the wild-caught flying squirrels. Chapter 2 described the bacterial communities of various gut compartments based on 16S rRNA gene sequences. Chapter 3 provided the phylogenetic and functional profiles of the cecal microbiota based on fosmid end-sequences. Chapter 4 revealed the metabolic characteristics of the cecal microbiota based on the comparison of metagenomic and metatranscriptomic sequences. No matter using which approaches, Firmicutes was the predominant group of the gut microbiota. All results indicated that the microbial functions greatly contributed to nutrient cycling (including degradation of carbohydrates, metabolism of proteins, and synthesis of vitamins) in the gut environments. High gene expression for sugar degradation, detection and uptake revealed microbial adaptations for plant biomass usage in small folivorous mammals.
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