scholarly journals Seasonal movements of caribou in arctic Alaska as determined by satellite

1989 ◽  
Vol 67 (3) ◽  
pp. 644-650 ◽  
Author(s):  
S. G. Fancy ◽  
L. F. Pank ◽  
K. R. Whitten ◽  
W. L. Regelin
Keyword(s):  
Adult Female ◽  
Rangifer Tarandus ◽  
Satellite Telemetry ◽  
Activity Data ◽  
Seasonal Movements ◽  
Terrestrial Mammal ◽  
Daily Movement ◽  
Movement Rates ◽  
Arctic Alaska

Between 1985 and 1987, 49 283 locations and 79 101 sets of activity data were obtained for 34 adult female caribou (Rangifer tarandus granti) of the Porcupine and Central Arctic herds using satellite telemetry. Daily movement rates of female caribou from the two herds, which differ greatly in size and separation of seasonal ranges, were similar except during the spring and fall migration periods. Movement rates in July exceeded those during migration in both herds. The minimum annual distances travelled by caribou cows, ranging to 5055 km, were the longest movements documented for any terrestrial mammal.

scholarly journals Winter distribution of woodland caribou in relation to clear-cut logging in west-central Alberta

2000 ◽  
Vol 78 (8) ◽  
pp. 1433-1440 ◽  
Author(s):  
Kirby G Smith ◽  
E Janet Ficht ◽  
David Hobson ◽  
Troy C Sorensen ◽  
David Hervieux
Keyword(s):  
Rangifer Tarandus ◽  
Timber Harvest ◽  
Timber Harvesting ◽  
Home Range Size ◽  
Woodland Caribou ◽  
Daily Movement ◽  
Movement Rates ◽  
Clear Cut ◽  
Winter Range ◽  
West Central

The responses of a herd of migratory woodland caribou (Rangifer tarandus caribou) to timber harvesting that fragmented about 11% of their winter range in west-central Alberta were examined in this study. From 1981 to 1996, 45 caribou were radio-collared and monitored during the initiation and completion of first-pass timber harvest (50% removal). Variables examined were home-range size, daily movement rates, and distance to the nearest cut block for radio-collared individuals. Daily movement rates and individual winter range sizes decreased as timber harvesting progressed. Caribou avoided using recently fragmented areas by an average of 1.2 km. If fragmentation of the winter range continues through timber harvesting and other industrial activities, the "spacing out" antipredator strategy used by caribou may be compromised. Based on these findings, timber-harvesting strategies are recommended that (i) ensure an adequate area of usable habitat to support the current population, (ii) minimize the amount of fragmented area, and (iii) in the short term avoid presently defined core use areas.

scholarly journals Use of satellite telemetry data, GIS, and HTML to create an interactive display of caribou movements

Rangifer ◽  
2003 ◽  
Vol 23 (5) ◽  
pp. 101
Author(s):  
Alexander K. Prichard ◽  
Geoffry M. Carroll ◽  
John C. George ◽  
Stephen M. Murphy ◽  
Mike D. Smith ◽  
...  
Keyword(s):  
General Public ◽  
Annual Variation ◽  
Satellite Telemetry ◽  
Telemetry Data ◽  
Daily Movement ◽  
Movement Rates ◽  
Interactive Display ◽  
Wintering Areas

The use of animation clearly reveals the large annual variation in wintering areas and large differences in daily movement rates for this herd. This interactive display can be adapted for school groups, subsistence hunters, the general public, or scientists.

scholarly journals Regional and age-dependent differences in the effect of wind on the migratory routes of Eleonora’s falcon

2015 ◽  
Vol 61 (3) ◽  
pp. 428-434 ◽  
Author(s):  
Ugo Mellone ◽  
Rubén Limiñana ◽  
Pascual López-López ◽  
Vicente Urios
Keyword(s):  
Satellite Telemetry ◽  
Daily Movement ◽  
Movement Rates ◽  
Equatorial Africa ◽  
Ecological Barriers ◽  
Age Dependent ◽  
Migratory Routes ◽  
Wintering Area ◽  
Orientation Mechanism ◽  
Eleonora’S Falcon

Abstract During migration, birds can show different responses to wind in relation to distance to the goal, experience, ecological barriers and visibility of landmarks. We analysed the effect of wind (tailwinds and crosswinds) on daily movement rates (forward and perpendicular) of Eleonora’s falcons using ARGOS satellite telemetry, during their trans-continental autumn migration to Madagascar, in relation to the different crossed regions and individuals’ age class. Our results showed that the effect of wind on daily movement rates was not uniform, being stronger in the farthest region from the migration goal, the Sahara desert, with adults being more affected than juveniles in this region. In the Sahel, the results were more conflicting, perhaps because daily movements were more shaped by the distribution of food resources. In Equatorial Africa, daily movement rates were mainly affected by crosswinds. Still, it remains unclear which orientation mechanism allows Eleonora’s falcons to reach such a narrow wintering area compensating also for wind displacement.

Range use and movement rates of woodland caribou in Saskatchewan

2001 ◽  
Vol 79 (11) ◽  
pp. 1933-1940 ◽  
Author(s):  
W James Rettie ◽  
François Messier
Keyword(s):  
Predator Avoidance ◽  
Site Fidelity ◽  
Rangifer Tarandus ◽  
Satellite Telemetry ◽  
Woodland Caribou ◽  
Telemetry Data ◽  
Movement Rates ◽  
Range Use ◽  
Seasonal Movement ◽  
Calf Mortality

We employed satellite-telemetry data to examine seasonal movement rates, annual- and seasonal-range sizes, and season-to-season range fidelity of female woodland caribou (Rangifer tarandus caribou) from five populations in the boreal forest of Saskatchewan. The populations studied are limited by predation, and we investigated whether female caribou exhibited movement and range use consistent with predator avoidance. Additionally, we document an animal-centred technique for assessing site fidelity on the basis of individual range use throughout a year. Females accompanied by calves had lower movement rates and smaller seasonal ranges than females without calves. Movement rates among female caribou tended to decline between the rut and the postcalving and summer seasons. Trends indicated that seasonal ranges were larger prior to calving than during the postcalving and summer seasons. We interpreted the range sizes and movement rates observed as being consistent with predator avoidance in nonmigratory caribou populations. Despite these results and high rates of calf mortality in the area, we did not find interannual fidelity to calving sites.

scholarly journals Extensive daily movement rates measured in territorial arctic foxes

2021 ◽  
Author(s):  
Marie‐Pier Poulin ◽  
Jeanne Clermont ◽  
Dominique Berteaux
Keyword(s):  
Daily Movement ◽  
Movement Rates ◽  
Arctic Foxes

scholarly journals Biochemical indicators of condition, nutrition and nitrogen excretion in caribou

Rangifer ◽  
1996 ◽  
Vol 16 (4) ◽  
pp. 201 ◽  
Author(s):  
Ray Case
Keyword(s):  
Body Composition ◽  
Adult Female ◽  
Rangifer Tarandus ◽  
Nitrogen Excretion ◽  
Late Winter ◽  
Marrow Fat ◽  
Urea Nitrogen ◽  
Biochemical Indicators ◽  
Fat Reserves ◽  
Nitrogen Concentrations

Urinary urea nitrogen to creatinine ratios, urinary Nt-methylhistidine to creatinine ratios, serum urea nitrogen concentrations (SUN mg/dl), and serum Nt-methylhistidine concentrations were compared with physical measures of body composition in adult female barren-ground caribou (Rangifer tarandus groenlandicus) from the Bathurst and Southampton Island herds during late winter. Body weight and UUC were used to estimate urinary urea nitrogen (urea-N) excretion in free ranging caribou. Only mean UUC reflected differences in fat reserves between populations. None of the biochemical indicators were directly related to body composition. However, elevated UUC were only observed in caribou with depleted fat reserves as demonstrated by low kidney fat index (KFK40) and/or reduced femur marrow fat (FMF<80). UUC greater than 0.25 were indicative of undernourished animals with depleted fat reserves. SUN and UN -MHC showed no clear relationship with fat reserves. The mean estimated daily urea-N excretion for adult female caribou in late winter was extremely low (0.11+0.01SE g urea-N/day, n=76, range=0.011-0.510). The results of my study suggest that UUC can be used to detect nutritionally stressed caribou with depleted fat reserves on lichen winter ranges.

scholarly journals Movements of Subadult Male Grizzly Bears, Ursus arctos, in the Central Canadian Arctic

2004 ◽  
Vol 118 (2) ◽  
pp. 239 ◽  
Author(s):  
Robert J. Gau ◽  
Philip D. McLoughlin ◽  
Ray Case ◽  
H. Dean Cluff ◽  
Robert Mulders ◽  
...  
Keyword(s):  
Home Range ◽  
Long Range ◽  
Rangifer Tarandus ◽  
Ursus Arctos ◽  
Canadian Arctic ◽  
Grizzly Bears ◽  
Home Ranges ◽  
Adult Males ◽  
Subadult Male ◽  
Daily Movement

Between May 1995 and June 1999, we equipped eight subadult male (3-5 yrs old) Grizzly Bears (Ursus arctos) with satellite radio-collars within a study area of 235,000 km2, centred 400 km northeast of Yellowknife, Northwest Territories, Canada. Subadult male annual home ranges were extraordinarily large (average = 11,407 km2, SE = 3849) due, in part, to their movement's occasional linear directionality. We believe their long-range linear movements may reflect some individuals tracking the migration of Caribou (Rangifer tarandus). Seasonal daily movement patterns were similar to adult males that were previously reported. The areas used by these bears are the largest ranges reported for any Grizzly Bears and the scale of their movements may put individual bears in contact with humans even when developments are hundreds of kilometres from the central home range of an animal.

scholarly journals Migration Paths of the Adult Female and Male Loggerhead Turtles Caretta caretta Determined through Satellite Telemetry

1997 ◽  
Vol 63 (4) ◽  
pp. 547-552 ◽  
Author(s):  
Wataru Sakamoto ◽  
Takeharu Bando ◽  
Nobuaki Arai ◽  
Norihisa Baba
Keyword(s):  
Adult Female ◽  
Satellite Telemetry ◽  
Caretta Caretta ◽  
Loggerhead Turtles

Movement patterns of female feral camels in central and northern Australia

2001 ◽  
Vol 28 (3) ◽  
pp. 283 ◽  
Author(s):  
Glenn P. Edwards ◽  
Stephen R. Eldridge ◽  
David Wurst ◽  
David M. Berman ◽  
Vanessa Garbin
Keyword(s):  
Kernel Method ◽  
Satellite Telemetry ◽  
Movement Patterns ◽  
Annual Rainfall ◽  
Northern Australia ◽  
Buffer Zones ◽  
Movement Rates ◽  
Environmentally Sensitive Areas ◽  
Large Home Range ◽  
Pattern Of Variation

Movement patterns of female feral camels were studied over four years (February 1993 to December 1996) in central and northern Australia using satellite telemetry. Areas used over 12-month periods (calculated using the fixed kernel method) were large (449–4933 km 2 ) and increased with increasing aridity as measured by long-term mean annual rainfall. No consistent pattern of variation was detected in movement rates of camels across seasons. Data collected over several years are needed to classify movements in feral camels. The only telemetered camel that has been monitored for longer than two years (this study) appeared to move within a large home range over the concluding 3.5 years that it was tracked. Because the areas used are large, extensive buffer zones will be needed in arid regions to protect environmentally sensitive areas from the impacts of feral camels.

Sign in / Sign up

Export Citation Format

Share Document