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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Daily activity rhythms in the flying squirrel, Glaucomys volans

DeCoursey, P. J. January 1959 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1959. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 148-162).
62

An examination of two unconventional methods to assess resource use by two New Brunswick forest mammals : the marten and the northern flying squirrel

Bourgeois, Maryse C. January 1900 (has links) (PDF)
Thesis (M. Sc.)--Acadia University, 1997. / Includes bibliographical references. Also available on the Internet via the World Wide Web.
63

An examination of two unconventional methods to assess resource use by two New Brunswick forest mammals : the marten and the northern flying squirrel /

Bourgeois, Maryse C. January 1900 (has links) (PDF)
Thesis (M. Sc.)--Acadia University, 1997. / Includes bibliographical references. Also available on the Internet via the World Wide Web.
64

The 'how' : the role of learning and flexibility in problem solving in grey and red squirrels

Chow, Pizza Ka Yee January 2015 (has links)
Recent studies have advanced our knowledge of factors that could affect problem solving performance, and also of the positive effects of problem solving ability on fitness measures (the ‘what’ of problem solving). However, a missing linkage exists between this ‘what’ and the corresponding ‘how’. Such linkage requires the understanding of how these factors contribute to problem solving. Therefore, the central aim of this thesis is to examine this ‘how’. The roles of learning and behavioural flexibility in the context of problem solving are shown across the experiments, primarily with laboratory and free-ranging grey squirrels and to a lesser extent with wild red squirrels. Under a recurring change, laboratory grey squirrels showed a rapid decrease in the number of errors they made per reversal phase in a serial spatial reversal learning task. Such efficiency is achieved by a gradual tactic change, from sequential to integrative tactics, with increased experience. It also involves support from cognitive mechanisms such as attention and inhibitory control. In a puzzle box task, wild grey squirrels showed that they were better problem solvers than the wild red squirrels. However, red squirrels that solved the puzzle box were more efficient than the grey solvers. Detailed analysis of the results showed that learning and flexibility play independent roles in problem solving. Each process is associated with particular traits that to increase efficiency. For grey squirrels, behavioural selectivity (effective behaviours) and persistence increased with increased experience. Flexibility, however, showed minimal positive effect for them, given that it decreased behavioural selectivity. In contrast, flexibility primarily provided a positive effect for red squirrels’ solving efficiency. These results showed that the two species appear to use both similar and different cognitive processes in solving the task. The discussion gathers the results and explores how learning and flexibility, along with other behavioural traits, vary in their contributions to problem solving performance. As learning and flexibility are definitely not limited in problem solving, the discussion also addresses how these two processes might be involved a construct of general intelligence (‘g’) in animals, and how they are relevant to wilder ecological aspects.
65

Systematic Study of Flying Squirrels (Mammalia, Sciuridae) in Lao PDR / ラオス産滑空性リス類(哺乳綱リス科)の分類学的研究

Daosavanh, SANAMXAY 23 March 2020 (has links)
京都大学 / 0048 / 新制・論文博士 / 博士(理学) / 乙第13320号 / 論理博第1567号 / 新制||理||1663(附属図書館) / (主査)教授 本川 雅治, 准教授 中野 隆文, 教授 曽田 貞滋 / 学位規則第4条第2項該当 / Doctor of Science / Kyoto University / DFAM
66

Hematological variation associated with altitude, season, sexual activity and body in the Uinta ground squirrel

Kinchloe, Ralph Theodore 01 August 1967 (has links)
Hematological comparisons were made on the Uinta ground squirrel (Citellus armatus) trapped at different altitudes and during vari ou s stages of seasonal activity in 1965 and 1966. Hematological variation due to sex, sexual activity and body weight were also analyzed. Ground squirrels were secured from the Mt. Timpanogos area near Provo, Utah County, Utah. Erythrocyte count, hematocrit, total blood hemoglobin, mean erythrocyte volume, mean erythrocyte hemoglobin and reticulocyte counts were measured using standard procedures; banding patterns of hemoglobin and serum proteins wer e determined by means of electrophoresis with polyacetate strips.
67

Physiological variations in the Uinta ground squirrel (Citellus armatus) in relation to seasonal activity and altitude

Kohler, Marden Reed 01 May 1967 (has links)
The purpose of this investigation was to study the weight changes of selected internal organs to determine possible physiological variation occurring at six different altitudes ranging from 5,800 to 8,500 feetand during the summer season. This report was limited to the study of changes in the adrenal glands, kidneys, testes, heart and intestines. Electrocardiogram, heart and respiration rates were investigated also. These changes were statistically analyzed to determine possible seasonal differences along with any significant changes occurring at different elevations. The results of the study should in part overcome the lack of current experimental data for Citellus armatus.
68

A study of the golden-mantled ground squirrel (Citellus lateralis) in a sagebrush-grass community

Peterson, Dennis E. 01 May 1967 (has links)
Golden-mantled ground squirrels (Citellus lateralis Say) typically inhabit coniferous forest regions, but they occasionally occur in desert shrub habitats. The principal purpose of this study was to observe activities of mantled squirrels in a sagebrush community, and to ascertain factors which contribute to their success in an unusually arid habitat. Squirrels of this community belong to the subspecies C. l. lateralis; however, intergradation between typical C. l. lateralis and C. l. castanurus is evident. This community is in the Wasatch Mountains at an elevation of 5,750 feet, and in the Upper Sonoran Zone. These three conditions were not previously recorded for members of this subspecies.
69

Locomotion, Morphology, and Habitat use in Arboreal Squirrels (Rodentia: Sciuridea)

Essner, Richard L., Jr. January 2003 (has links)
No description available.
70

A study of the habits and management of the gray squirrel in Virginia (Continued)

Cross, Richard H. January 1942 (has links)
Master of Science

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