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EXTRACTING MORE OUT OF RELOCATION DATA: BUILDING MOVEMENT MODELS AS MIXTURES OF RANDOM WALKS
A framework for fitting multiple random walks to animal move- ment paths consisting of ordered sets of step lengths and turning angles, which allows for identification of different movement states using several properties of observed paths and lead naturally to the formulation of movement models. Expand
Are there general mechanisms of animal home range behaviour? A review and prospects for future research.
A review of recent advances in modelling home range behaviour focuses particularly on the problem of identifying mechanisms that lead to the emergence of stable home ranges from unbounded movement paths, and discusses the issue of spatiotemporal scale, which is rarely considered in modelling studies. Expand
Forage Quality and Aggregation by Large Herbivores
- J. Fryxell
- The American Naturalist
- 1 August 1991
Simulations based on the energy-intake model suggest a number of key environmental factors that should determine the impact of forage maturation and spatial variation on herbivore distribution patterns. Expand
Human Activity Mediates a Trophic Cascade Caused by Wolves
Elk population density diverged over time in the two treatments, such that elk were an order of magnitude more numerous in the low- wolf area compared to the high-wolf area at the end of the study, which support the wolf-caused trophic cascade hypothesis. Expand
Scale and heterogeneity in habitat selection by elk in Yellowstone National Park
Abstract Resource selection functions (RSF) can be used to explore the role of scale in determining patterns of habitat use. We estimated RSFs for 93 radiocollared adult female elk (Cervus… Expand
Wildlife Ecology, Conservation and Management
The ecology of behavior, population regulation, fluctuation and competition within species, and competition and facilitation between species reveal a complex web of interactions between species and the environment. Expand
Genetic isolation by distance and landscape connectivity in the American marten (Martes americana)
Empirical studies of landscape connectivity are limited by the difficulty of directly measuring animal movement. ‘Indirect’ approaches involving genetic analyses provide a complementary tool to… Expand
Can parks protect migratory ungulates? The case of the Serengeti wildebeest
The conservation of migratory species can be problematic because of their requirements for large protected areas. We investigated this issue by examining the annual movements of the migratory… Expand
Causes and consequences of migration by large herbivores.
Seasonal migration has important implications for the structure and dynamics of large herbivore communities and can have an important impact on the long-term persistence of plant-herbivore systems, particularly in areas with slow rates of vegetation regeneration. Expand
Why are Migratory Ungulates So Abundant?
It is concluded that increased efficiency in resource use by migrants is insufficient to explain the order-of-magnitude disparities in abundance seen in some African ecosystems, and differences in the modes of regulation explain the predominance of migratory herbivores in some grassland ecosystems. Expand