Home range scaling: intraspecific and comparative trends

Area of Science:

• Ecology
• Zoology
• Wildlife Biology

Background:

• Intraspecific variation in home range size and body mass is crucial for understanding ecological strategies.
• Dietary composition significantly influences resource needs and spatial ecology in carnivore species.
• Previous cross-species studies have established correlations between body mass, diet, and home range.

Purpose of the Study:

• To examine intraspecific and intrasexual variation in home range size, body mass, and ecological productivity.
• To compare intraspecific findings with existing cross-species ecological studies.
• To investigate the relationship between home range size, latitude, and diet in three carnivore species.

Main Methods:

• Analysis of home range size and body mass variation within and between sexes for three carnivore species.
• Statistical correlation of home range size with latitude and dietary composition (proportion of meat).
• Comparison of intraspecific results with published cross-species data on carnivore ecology.

Main Results:

• A significant positive correlation was found between home range size and body mass in bobcats (Felis rufus).
• Home range size strongly correlated with latitude across all three species (Felis rufus, Canis latrans, Ursus americanus) in both intraspecific and intrasexual analyses.
• The scaling of home range size with latitude was steepest for the most carnivorous species (Felis rufus) and shallowest for the most herbivorous (Ursus americanus).

Conclusions:

• Dietary meat proportion influences the steepness of the relationship between home range size and latitude in carnivores.
• Findings support models of trophic level biomass changes with productivity and parallel cross-species dietary differences.
• Intraspecific variation in spatial ecology is strongly linked to both latitude and diet, reflecting fundamental ecological principles.