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Spatial and temporal scaling of population density and animal movement

A power law approach
Ecoscience
Author(s): 
James A. Schaefer and Shane P. Mahoney

Many ecological patterns are sensitive to spatial and temporal scale, but no general protocol has emerged for dealing with scale-dependence. The authors suggest that power laws, regularly used in the study of body size, can be applied to many such features. The authors used these techniques to describe two scale-sensitive aspects of caribou (Rangifer tarandus): population densities of North American herds when measured at varying spatial extents, and speeds of radiotracked individuals when observed at varying temporal resolutions.

Spatial and Temporal Distributions of Moose-Vehicle Collisions in Newfoundland

Wildlife Society Bulletin
Author(s): 
Tammy L. Joyce and Shane P. Mahoney

In Newfoundland, 5,422 moose-vehicle collisions (MVCs) occurred between 1988 and 1994, resulting in 14 human and approximately 4,800 moose (Alces alces) fatalities. The authors examined daily, seasonal, and spatial distribution patterns of MVCs and used log-linear modeling to assess effects of darkness, posted speed limits, road condition, vehicle occupants, and road alignment on severity of human injury resulting from such collisions. Seventy-five percent of all MVCs occurred between dusk and dawn.

The relationship between weather and caribou productivity for the LaPoile Caribou Herd, Newfoundland

Rangifer
Author(s): 
Steven H. Ferguson and Shane P. Mahoney

To describe the relationship between weather and caribou (Rangifer tarandus) productivity, the authors compared weather variables (snow on ground, winter temperature and measures of growing season) with measures of productivity (calves seen by hunters, calves and yearlings in the harvest and percent calves and yearlings and pregnancy rate for caribou classified during fall and spring surveys) for the LaPoile Caribou Herd in southwestern Newfoundland. Hunter statistics reliably estimated changes in population demography.

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Spatial and temporal scaling of population density and animal movement

A power law approach
Ecoscience
Author(s): 
James A. Schaefer and Shane P. Mahoney

Many ecological patterns are sensitive to spatial and temporal scale, but no general protocol has emerged for dealing with scale-dependence. The authors suggest that power laws, regularly used in the study of body size, can be applied to many such features. The authors used these techniques to describe two scale-sensitive aspects of caribou (Rangifer tarandus): population densities of North American herds when measured at varying spatial extents, and speeds of radiotracked individuals when observed at varying temporal resolutions.

Spatial and Temporal Distributions of Moose-Vehicle Collisions in Newfoundland

Wildlife Society Bulletin
Author(s): 
Tammy L. Joyce and Shane P. Mahoney

In Newfoundland, 5,422 moose-vehicle collisions (MVCs) occurred between 1988 and 1994, resulting in 14 human and approximately 4,800 moose (Alces alces) fatalities. The authors examined daily, seasonal, and spatial distribution patterns of MVCs and used log-linear modeling to assess effects of darkness, posted speed limits, road condition, vehicle occupants, and road alignment on severity of human injury resulting from such collisions. Seventy-five percent of all MVCs occurred between dusk and dawn.

The relationship between weather and caribou productivity for the LaPoile Caribou Herd, Newfoundland

Rangifer
Author(s): 
Steven H. Ferguson and Shane P. Mahoney

To describe the relationship between weather and caribou (Rangifer tarandus) productivity, the authors compared weather variables (snow on ground, winter temperature and measures of growing season) with measures of productivity (calves seen by hunters, calves and yearlings in the harvest and percent calves and yearlings and pregnancy rate for caribou classified during fall and spring surveys) for the LaPoile Caribou Herd in southwestern Newfoundland. Hunter statistics reliably estimated changes in population demography.