Tracking toads from dusk till dawn: linking inter- and intra-individual variation in movement behavior.

Area of Science:

• Ecology
• Animal Behavior
• Movement Ecology

Background:

• Individual variation in animal movement is crucial for understanding population dynamics.
• Previous studies often overlook individual differences in movement patterns.
• Understanding these variations is key to population distribution studies.

Purpose of the Study:

• To investigate the link between individual animal movements and population distributions.
• To analyze how within-individual movement variation affects population-level patterns.
• To assess the role of movement behavior in shaping population distributions.

Main Methods:

• Radio-tracking of 13 Fowler's Toads (Anaxyrus fowleri) in Ontario, Canada.
• High-resolution coordinate recording (every 30 min) over nightly periods.
• Application of Hidden Markov Models to classify movement types (directed/non-directed) and states (foraging/transit/searching).

Main Results:

• Movement type and state switched within individuals, irrespective of time.
• Within-individual variation in movement switching occurred throughout the night.
• Significant differences in movement distances were observed among individuals, while movement states showed time-dependency.

Conclusions:

• Individual movement behavior variation scales up to influence population-level distributions.
• A multi-scale approach is essential for studying animal movement patterns.
• Movement routines may be conserved across individuals, but behavioral switching introduces variability.