Results 41 to 50 of about 7,420 (240)

Comparing autumn duck use of intensely managed wetlands in Michigan using a novel approach

The Journal of Wildlife Management, EarlyView.
Camera traps, a relatively novel method for assessing waterfowl use of wetlands, show ducks in southeastern Michigan are influenced by hunting disturbance, vegetation type, season progression, and diel period. Abstract Socioeconomic value derived from duck hunting has contributed to autumn habitat use becoming a particular focus for the natural ...
Trey McClinton, David R. Luukkonen, Daniel B. Hayes   +2 more
wiley   +1 more source

Comparative patterns of winter habitat use by muskoxen and caribou in northern Alaska [PDF]

, 1992
Thesis (M.S.) University of Alaska Fairbanks, 1992Snow depth and hardness strongly influenced selection of feeding zones, (i.e., those areas used for foraging), in late winter by both muskoxen (Ovibos moschatus) and caribou (Rangifer tarandus grand) in ...
Biddlecomb, Mark Edward
core  

Neo‐Taphonomic Analysis of Prey Bone Remains Accumulated by Golden Eagle (Aquila chrysaetos): A Case of Nests in Southern France

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT The golden eagle (Aquila chrysaetos) nests in rock cavities where it accumulates prey bone remains during the breeding season. Because nests can be reoccupied from year to year, these faunal elements can form remarkable bone accumulations and, in the sub‐fossil record, be mixed with assemblages derived from human or other predator activities ...
Juliette Ripond, Véronique Laroulandie, Jean‐Baptiste Mallye, Renaud Nadal, Patrick Bayle, Christian Itty   +5 more
wiley   +1 more source

Peary caribou (Rangifer tarandus pearyi) and muskoxen (Ovibos moschatus) on northwest Victoria Island, Northwest Territories

Rangifer, 2013
An aerial population survey of Peary caribou (Rangifer tarandus pearyi) and muskoxen (Ovibus moschatus) on Victoria Island, Northwest Territories, was conducted in July 2010.
Tracy Davison, Judy Williams
doaj   +1 more source

Snowmelt Onset and Caribou (Rangifer tarandus) Spring Migration

Remote Sensing
Caribou (Rangifer tarandus) undergo exceptionally large, annual synchronized migrations of thousands of kilometers, triggered by their shared environmental stimuli. The proximate triggers of those migrations remain mysterious, though snow characteristics play an important role due to their influence on the mechanics of locomotion.
Mariah T. Matias, Joan M. Ramage, Eliezer Gurarie, Mary J. Brodzik   +3 more
openaire   +2 more sources

Impacts of reindeer grazing on phosphorus sorption and nutrient availability in a tundra site

Oikos, EarlyView.
Reindeer Rangifer tarandus, a large circumpolar herbivore, can influence whether nitrogen (N) or phosphorus (P) is the primary limiting nutrient in tundra plant communities. Specifically, findings from a site in northern Scandinavia suggest that under conditions where reindeer grazing stimulates inorganic N availability, grazing may drive ecosystems ...
Jerzy Szejgis, Johan Olofsson, Henni Ylänne, Michael J. Gundale, Reiner Giesler, Maja K. Sundqvist   +5 more
wiley   +1 more source

Seasonal variation of leaf functional traits in sub‐Arctic plants

Oikos, EarlyView.
Leaf functional traits are informative of plant fitness and functions in ecosystems. These functional traits and their variation across geographic extents are much studied but less is known about their temporal variation over a growing season. Here, we provide an analysis of the seasonal variation in six leaf functional traits of 11 sub‐Arctic vascular
Pekka Niittynen, Marija Merkurjeva, Julia Kemppinen   +2 more
wiley   +1 more source

Population Ecology of Caribou in British Columbia

Rangifer, 1996
The abundance and geographic range of woodland caribou (Rangifer tarandus caribou) decreased in many areas of British Columbia during the 1900's. Recent studies have found that predation during the summer is the major cause of mortality and current ...
D.R. Seip, D.B. Cichowski
doaj   +1 more source

Epidemiology of the lymphatic-dwelling filarioid nematode Rumenfilaria andersoni in free-ranging moose (Alces alces) and other cervids of North America [PDF]

, 2016
Background: Moose (Alces alces) are a culturally and economically valued species in Minnesota, where the northeast population has decreased by 60 % since 2006.
Carstensen, Michelle, Elam, Jacob, Gerhold, Richard W., Grunenwald, Caroline M., Hildebrand, Erik, Laaksonen, Sauli, Oksanen, Antti   +6 more
core   +2 more sources

From the brink of extinction to regulation: northern Europe's white‐tailed eagles now face density dependence and climate constraints after rapid population growth

Oikos, EarlyView.
Population growth reflects the combined influence of regulation and density‐independent factors operating through demographic processes. Under exceptional circumstances (e.g. populations recovering from near‐extinction), growth may initially be weakly regulated but typically slows as negative density dependence (NDD) sets in.
Bård‐Jørgen Bårdsen, Elisabeth Hansen, Jan Ove Bustnes   +2 more
wiley   +1 more source