Results 101 to 110 of about 85,904 (291)

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics

Journal of Glaciology, 2017
Fine resolution topographic data derived from methods such as Structure from Motion (SfM) and Multi-View Stereo (MVS) have the potential to provide detailed observations of geomorphological change, but have thus far been limited by the logistical ...
JOSEPH MALLALIEU, JONATHAN L. CARRIVICK, DUNCAN J. QUINCEY, MARK W. SMITH, WILLIAM H.M. JAMES   +4 more
doaj   +1 more source

Epidemiology and economic impact of Johne's disease in Irish dairy herds [PDF]

, 2008
End of project reportThis project addressed two aspects of an emerging infectious disease of Irish cattle; the epidemiology and the economic impacts of Johne’s disease (paratuberculosis).
Mee, John F, Richardson, Esther K. B.
core  

Navigating a landscape of contrasting hunting regimes and habitats: red deer responses to risk and resources

Wildlife Biology, EarlyView.
Habitat selection of ungulates is influenced by various factors, with human interactions playing a significant role. Human disturbances through hunting strongly affect ungulate behaviour, often forcing them to modify their habitat choices by avoiding areas where the risk from humans outweighs other habitat benefits. Gaining insights into these dynamics
Juliana Eggers, Michael Maroschek, Rupert Seidl, Sina Greiner, Matthias Loretto, Sebastian Seibold, Rudolf Reiner   +6 more
wiley   +1 more source

Seasonality and Costs of Production on Irish dairy farms from 1994-2008 [PDF]

, 2010
working paperPrevious research has highlighted the economic advantages of spring calving in countries such as Ireland that have a long spring/summer grazing season. However, the widespread adoption of such a production system leads to a highly seasonal
Harte, Laurence, Hennessy, Thia, Smyth, Paul   +2 more
core  

Hunting regulations and movements of alpine reindeer

Wildlife Biology, EarlyView.
Most ungulate populations are regulated by hunting, and harvest rate is regulated through quotas and hunting season duration. Hunting is well known to affect behaviour of ungulates, but how annual variation in quotas and hunting season duration affects individual behaviour remains uncertain.
Atle Mysterud, Bram Van Moorter, Olav Strand, Christer M. Rolandsen   +3 more
wiley   +1 more source

Comparison of the effects of high and low milk-replacer feeding regimens on health and growth of crossbred dairy heifers [PDF]

, 2019
Context: Pre-weaning growth in dairy heifers is highly dependent on the amount of milk fed. Both milk replacer (MR) and associated labour are costly, encouraging restricted milk rations and once-a-day feeding.
Johnson, Kate F., Nair, R. Vinod, Wathes, D. C.   +2 more
core   +2 more sources

Micro‐habitat selection by boreal woodland caribou improves access to food

Wildlife Biology, EarlyView.
Bio‐logging sensors attached to radiotelemetry receivers have great potential to transform our understanding of the ecological, physiological, and energetic constraints that shape patterns of wildlife movement under field conditions. We used video camera collars to assess microhabitat selectivity by woodland caribou Rangifer tarandus in boreal forests ...
Ian D. Thompson, Philip A. Wiebe, Arthur R. Rodgers, Douglas Reid, James A. Baker, Brent R. Patterson, Eric McNeill, Romain Dejeante, John M. Fryxell   +8 more
wiley   +1 more source

DNA metabarcoding reveals wolf dietary patterns in the northern Alps and Jura Mountains

Wildlife Biology, EarlyView.
Understanding predator–prey interactions is crucial for wildlife management and human–wildlife coexistence, particularly in multi‐use landscapes such as western Europe. As wolves Canis lupus recolonize their former habitats, knowledge of their diet is essential for conservation, management and public acceptance.
Florin Kunz, Eduard Mas‐Carrió, Philippine Surer, Fridolin Zimmermann, Philippe Christe, Luca Fumagalli, Nina Gerber   +6 more
wiley   +1 more source

Tidewater calving [PDF]

Journal of Glaciology, 1996
AbstractData from Columbia Glacier are used to identify processes that control calving from a temperate tidewater glacier and to re-evaluate models that have been proposed to describe iceberg calving. Since 1981, Columbia Glacier has been retreating rapidly, with an almost seven-fold increase in calving rate from the mid-1970s to 1993. At the same time,
openaire   +1 more source

Estimating red deer Cervus elaphus population density using drones in a steep and rugged terrain

Wildlife Biology, EarlyView.
Precise and accurate information about population density, crucial for wildlife management, is difficult to obtain for elusive species living in dense forests or steep and inaccessible terrain. Using unmanned aerial vehicles (UAVs), we developed a method for obtaining absolute population estimates of ungulates living in steep, rugged, and partly ...
Julie Bommerlund, Torbjørn Ergon, Simon Filhol, Atle Mysterud   +3 more
wiley   +1 more source