Using GPS technology and GIS cluster analyses to estimate kill rates in wolf—ungulate ecosystems

  title={Using GPS technology and GIS cluster analyses to estimate kill rates in wolf—ungulate ecosystems},
  author={H. Sand and Barbara Zimmermann and Petter Wabakken and H. Andr{\'e}n and H. C. Pedersen},
Abstract Predatory behavior of wolves (Canis lupus) was studied in 2 wolf territories in Scandinavia. We used hourly data from Global Positioning System (GPS)-collared adult wolves in combination with Geographic Information System (GIS) for detailed analyses of movement patterns. We tested the hypothesis that wolves spend 1–2 days close to larger prey such as moose (Alces alces) and reasoned that 1–2 locations per day would be enough to find all larger prey killed by the wolves. In total, the… Expand
Wolf Movement Patterns: a Key to Estimation of Kill Rate?
Abstract To estimate wolf (Canis lupus) kill rates from fine-scale movement patterns, we followed adult wolves in 3 territories of the Scandinavian wolf population using Global Positioning SystemsExpand
Use of GPS location clusters analysis to study predation, feeding, and maternal behavior of the Eurasian lynx
Analysis of global positioning system (GPS) location clusters (GLCs) is becoming increasingly popular in studies of carnivore ecology. While promising, this application of GPS technology is stillExpand
Estimating individual kill rates on moose calves by brown bears based on GPS technology and GIS cluster analysis
The brown bear Ursus arctos L. is an omnivorous species, utilising a range of different food sources. The Scandinavian brown bear is an efficient predator on moose calves Alces alces L. during theExpand
Influence of different GPS schedules on the detection rate of wolf feeding sites in human-dominated landscapes
The results indicate that using long time intervals between locations to study wolf feeding behavior in human-dominated landscapes will underestimate not only predation rates, but also the importance of scavenging events. Expand
Identification of kill sites from GPS clusters for jaguars (Panthera onca) in the southern Pantanal, Brazil
Abstract Context. Understanding predator–prey relationships is important for making informed management decisions. Knowledge of jaguar (Panthera onca) predation on livestock and native prey isExpand
Complementing GPS Cluster Analysis with Activity Data for Studies of Leopard (Panthera pardus) Diet
Despite their wide distribution, feeding habits of leopards, Panthera pardus, outside savanna and forest habitats are poorly understood. We explored a novel approach of combining both GPS cluster andExpand
Identifying bobcat Lynx rufus kill sites using a global positioning system
The role of predation in ecological systems has received considerable attention in scientific literature and is one of the most important, yet least understood aspects of carnivore ecology. KnowledgeExpand
Encounter frequencies between GPS-collared wolves (Canis lupus) and moose (Alces alces) in a Scandinavian wolf territory
Over 6,000 GPS fixes from two wolves (Canis lupus) and 30,000 GPS fixes from five moose (Alces alces) in a wolf territory in southern Scandinavia were used to assess the static and dynamicExpand
Movement patterns of snow leopard (Panthera uncia) around kills based on GPS location clusters
Research concerning movement patterns of wild animals has been advancing since GPS technology arrived. But studying the snow leopard (Panthera uncia) is still difficult because of the harsh territoryExpand
Determinants of winter kill rates of wolves inScandinavia
Winter wolf (Canis lupus) kill rates on moose (Alces alces) on the Scandinavian Peninsula are high and subject to strong variation, compared to other boreal wolf-moose systems. A more detailedExpand


Estimating cougar predation rates from GPS location clusters
Applying GPS technology to identify predation rates and prey selection will allow managers to efficiently estimate the ability of an area's prey base to sustain or be affected by cougar predation. Expand
Ecology of wolves in relation to a migratory Caribou Herd in northwest Alaska
There is a paucity of data concerning wolf (Canis lupus) demography, movement patterns, and predation characteristics in relation to migratory caribou (Rangifer tarandus granti). Consequently, duringExpand
Effects of Population Density and Pack Size on the Foraging Ecology of Gray Wolves
A decline in the gray wolf ( Canis lupus ) population in Isle Royale National Park prompted an intensive study of radiocollared individuals in 1988–1991, complementing an ongoing study begun in 1958.Expand
Kill rate by wolves on moose in the Yukon
Wolf predation was found to be mainly additive on both moose and caribou populations, and Wolves did not show a strong switching response away from moose as the ratio of caribus to moose increased in winter. Expand
Home range, activity and movements of a wolf pack in central Italy
By being essentially nocturnal, resident wolves appeared to adopt tactics of temporal segregation from people to exploit food resources safely in the proximity of human settlements to represent the most functional compromise between avoidance of human inteference and exploitation of the available food resources. Expand
Moose-wolf dynamics and the natural regulation of moose populations
Moose populations in southwestern Québec are regulated largely by predators at a density where competition for forage produces no detrimental effect, supporting the concept that wolf predation can have an important regulatory effect at low moose density but also a depensatory effect at higher densities. Expand
The recovery, distribution, and population dynamics of wolves on the Scandinavian peninsula, 1978-1998
Simulation of population growth based on known reproductions and mortalities showed a close similarity to the results from population censuses up to the mid-1990s. Expand
Examining moose-wolf interactions over a broad spectrum of moose densities with the primary objective to test empirically whether wolf predation can regulate moose numbers suggests that moose would stabilize at 2.0 moose/km2 in the absence of predators, and at - 1.3 moose/(km2) in the presence of a single predator, the wolf. Expand
Evaluation of a GPS collar for white-tailed deer.
This new GPS collar design can be used cost-effectively to obtain animal locations with great accuracy and precision and with little operator or equipment error. Expand
Surplus Killing of White-Tailed Deer by Wolves in Northcentral Minnesota
Evidence indicates that nutrition and extreme deterioration of condition of deer is the major link between winter severity (penetrability and depth of snow) and excessive killing by wolves, which may be predicted when snow depth exceeds 70 cm for 4–8 weeks. Expand