Winter Activity Patterns of Two Radio-Marked Beaver Colonies

1982 ◽  
Vol 63 (4) ◽  
pp. 598-606 ◽  
Author(s):  
R. A. Lancia ◽  
W. E. Dodge ◽  
J. S. Larson
Keyword(s):  
Activity Patterns ◽  
Winter Activity

Winter activity patterns of females in two moose populations

1989 ◽  
Vol 67 (6) ◽  
pp. 1516-1522 ◽  
Author(s):  
Göran Cederlund ◽  
Roger Bergström ◽  
Finn Sandegren
Keyword(s):  
Food Availability ◽  
Activity Pattern ◽  
Average Length ◽  
Activity Patterns ◽  
Body Motion ◽  
Active Time ◽  
Low Level ◽  
Winter Activity ◽  
Radio Signals ◽  
High Level

Data on activity patterns of nine radio-tagged female moose (Alces alces) in an area with a high level of nutrition (Grimsö) and seven radio-tagged female moose in an area with a low level of nutrition (Furudal) are presented. The study was done during January–May in 1982–1986 at Grimsö and in 1986 in Furudal, comprising 6063 and 4136 h of recording, respectively. The character of the radio signals allowed separation of active (any kind of body motion, mainly movements) and inactive (a motionless state, mainly in lying position) bouts. The 24-h activity pattern was similar between the two areas during all winter months. Active bouts showed a polyphasic pattern with prominent peaks around sunrise and sunset. The average active time per 24-h interval varied (30–50%) through the winter months, and increased rapidly in April and May. The average length of active bouts was similar in both areas during midwinter (60–70 min) but developed more rapidly in April and May among moose at Grimsö. The moose at Furudal rested for longer periods than those at Grimsö, and in both areas bouts became shorter towards spring (around 120 min). The moose at Grimsö kept the number of bouts per 24-h interval almost unchanged throughout winter (11.0–11.9), while the number consistently increased at Furudal (9.9–12.7 bouts per 24-h interval). Differences in activity pattern are discussed in relation to food availability and overbrowsing.

Winter activity patterns of the North American badger (Taxidea taxus) at its northwestern periphery

2019 ◽  
Vol 101 (1) ◽  
pp. 199-210
Author(s):  
Stephen A Symes ◽  
Richard Klafki ◽  
Roger Packham ◽  
Karl W Larsen
Keyword(s):  
North American ◽  
Activity Patterns ◽  
Winter Climate ◽  
Taxidea Taxus ◽  
The North ◽  
Remote Cameras ◽  
Fat Reserves ◽  
Winter Activity ◽  
Winter Foraging ◽  
American Badger

Abstract The North American badger (Taxidea taxus) is a nonhibernating carnivore that occurs in areas with highly seasonal climates, such as in Canada where the animal reaches its northern limits. There, winter climate is harsh and conventional habitat is limited and patchy, possibly leading to additional energetic constraints. Using radiotelemetry and remote cameras, we documented winter activities of 16 badgers (12 females, 4 males) between 2007 and 2011 in British Columbia, at the northwestern periphery of the species’ range. In comparison to their summer ecology, the animals reduced home range sizes by up to 98% and showed fidelity to particular burrows. Burrow fidelity was variable (mean 27 days; range 0–108) and coincided with reduction in body temperatures, suggesting the onset of torpor. Despite lengthy use of the same burrow, badgers emerged frequently and conducted excursions that appeared to represent foraging behavior. Burrow emergence was not related to ambient temperature or snow depth; rather, it was best explained by the amount of days elapsed since the start of winter. Despite these trends, winter activity also was variable among individual badgers. It may be that limited fat reserves and higher energetic costs in northwestern ranges require winter foraging activities.

Winter activity patterns of northern flying squirrels in sub-boreal forests

2000 ◽  
Vol 78 (11) ◽  
pp. 1896-1901 ◽  
Author(s):  
C Laine Cotton ◽  
Katherine L Parker
Keyword(s):  
Boreal Forests ◽  
Activity Patterns ◽  
Conservation Strategy ◽  
Temperature Sensitive ◽  
Data Logging ◽  
Flying Squirrels ◽  
Winter Activity ◽  
Northern Flying Squirrels ◽  
Field Season ◽  
Using Data

We described autumn-winter activity patterns of northern flying squirrels (Glaucomys sabrinus) in northwestern British Columbia during 1996-1997 and 1997-1998. Nineteen flying squirrels (12 males and 7 females) were fitted with temperature-sensitive radio collars. We located animals in 82 daytime nests using radiotelemetry techniques and monitored 268 nights of activity using data-logging receivers placed at the base of nest trees. The average temperature of the animals, as determined by the collar sensors while the animals were in nests, was 39.2 ± 0.1°C, with no significant differences among animals, tree species, or tree sizes. Activity periods in a mild field season followed a dusk- and dawn-activity pattern, but activities in harsh winter conditions shifted towards a shorter single activity bout or two very short activity bouts in the middle of the night. No long activity bouts (>1.9 h) were observed at temperatures below -20°C. This reduction in time spent active and adjustment of the timing of activity during extremely low temperatures likely serve as an energy-conservation strategy.

scholarly journals Winter activity patterns in an invading Mediterranean population of American mink (Neovison vison)

2011 ◽  
Vol 60 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Yolanda Melero ◽  
Santiago Palazon ◽  
Eloy Revilla ◽  
Joaquim Gosalbez
Keyword(s):  
American Mink ◽  
Activity Patterns ◽  
Neovison Vison ◽  
Mediterranean Population ◽  
Winter Activity

Late-winter activity patterns of moose (Alces alces gigas) in western Alaska

1992 ◽  
Vol 70 (2) ◽  
pp. 293-299 ◽  
Author(s):  
Michael P. Gillingham ◽  
David R. Klein
Keyword(s):  
Alces Alces ◽  
Activity Patterns ◽  
Late Winter ◽  
Time Budgets ◽  
Ambient Conditions ◽  
Direct Observations ◽  
Winter Activity ◽  
Gravel Bars ◽  
Alces Alces Gigas ◽  
Free Ranging

Activity patterns of free-ranging moose (Alces alces gigas) on the central Seward Peninsula were polyphasic but not highly synchronized among individuals from March through May 1987. Female–calf pairs, however, showed nearly identical activity patterns (92.6% of 2353 five-minute scans). Based on data collected between 06:00 and 24:00, we estimate that moose exhibit ~5 or 6 active bouts per 24-h period. Our direct observations of moose (980 moose-h) showed that moose were active 57.2% of the time from 06:00 to 24:00. Inactive bouts lasted ~2.5 times longer than active bouts. Calves tended to lie for longer [Formula: see text] than adult females (143.1 ± 15.5 min) or males (109.0 ± 17.9 min). Time budgets for moose in late winter were intermediate between values reported in previous studies for moose in midwinter and late spring. Our data showed that moose spend much more time walking (8%) than previously reported. We think this reflects their use of the snow-packed river and gravel bars as movement and feeding corridors. Direct observations of moose showed that many active and inactive bouts were less than 10 min in duration; these bouts are not detected by most telemetric systems. We also present evidence that without predation in winter, ambient conditions (e.g., operative temperature) may cause synchrony in the activity patterns of individual moose in northwestern Alaska.

Predicting spatial activity patterns in a neural map from a probabilistic atlas of 3-D reconstructed neurons

1995 ◽  
Vol 53 ◽  
pp. 812-813
Author(s):  
G. Jacobs ◽  
F. Theunissen
Keyword(s):  
Activity Patterns ◽  
Three Dimensional ◽  
Sensory System ◽  
Neural System ◽  
Probabilistic Atlas ◽  
Uniform Sample ◽  
Dimensional Reconstruction ◽  
The Time Domain ◽  
And Function ◽  
Visualization Techniques

In order to understand how the algorithms underlying neural computation are implemented within any neural system, it is necessary to understand details of the anatomy, physiology and global organization of the neurons from which the system is constructed. Information is represented in neural systems by patterns of activity that vary in both their spatial extent and in the time domain. One of the great challenges to microscopists is to devise methods for imaging these patterns of activity and to correlate them with the underlying neuroanatomy and physiology. We have addressed this problem by using a combination of three dimensional reconstruction techniques, quantitative analysis and computer visualization techniques to build a probabilistic atlas of a neural map in an insect sensory system. The principal goal of this study was to derive a quantitative representation of the map, based on a uniform sample of afferents that was of sufficient size to allow statistically meaningful analyses of the relationships between structure and function.

Inducing Unconscious Stress

2020 ◽  
Vol 34 (3) ◽  
pp. 192-201
Author(s):  
Melanie M. van der Ploeg ◽  
Jos F. Brosschot ◽  
Markus Quirin ◽  
Richard D. Lane ◽  
Bart Verkuil
Keyword(s):  
Repeated Measures ◽  
Activity Patterns ◽  
Physiological Changes ◽  
Implicit Measures ◽  
Prime Word ◽  
Student Sample ◽  
Priming Task ◽  
Subject Design ◽  
The Relationship ◽  
Stress And Health

Abstract. Stress-related stimuli may be presented outside of awareness and may ultimately influence health by causing repetitive increases in physiological parameters, such as blood pressure (BP). In this study, we aimed to corroborate previous studies that demonstrated BP effects of subliminally presented stress-related stimuli. This would add evidence to the hypothesis that unconscious manifestations of stress can affect somatic health. Additionally, we suggest that these findings may be extended by measuring affective changes relating to these physiological changes, using measures for self-reported and implicit positive and negative affectivity. Using a repeated measures between-subject design, we presented either the prime word “angry” ( n = 26) or “relax” ( n = 28) subliminally (17 ms) for 100 trials to a student sample and measured systolic and diastolic BP, heart rate (HR), and affect. The “angry” prime, compared to the “relax” prime, did not affect any of the outcome variables. During the priming task, a higher level of implicit negative affect (INA) was associated with a lower systolic BP and diastolic BP. No association was found with HR. Self-reported affect and implicit positive affect were not related to the cardiovascular (CV) activity. In sum, anger and relax primes elicited similar CV activity patterns, but implicit measures of affect may provide a new method to examine the relationship between (unconscious) stress and health.

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