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Area of Science:

  • Behavioral Ecology
  • Cognitive Ecology
  • Animal Movement

Background:

  • Animals typically establish home ranges, presumed to enhance fitness through landscape knowledge.
  • The link between spatial memory, home range development, and selection pressures remains empirically underexplored.

Purpose of the Study:

  • To investigate how spatial memory influences home range development in pheasants.
  • To determine if natural selection acts on spatial memory through its effect on space use and mortality risk.

Main Methods:

  • Assayed spatial reference memory in juvenile pheasants before wild release.
  • Utilized high-throughput tracking to monitor home range development and mortality events.
  • Correlated cognitive abilities with movement patterns, home range size, and causes of death.

Main Results:

  • Individuals with superior spatial memory exhibited larger home ranges.
  • Predation risk was highest in peripheral home range areas with less learned spatial information.
  • Greater spatial memory and larger core home ranges were associated with reduced mortality.

Conclusions:

  • Spatial memory, assessed via cognitive assays, significantly shapes home range development and variation.
  • Predation risk appears to select for spatial memory, favoring individuals who learn landscape risks more effectively.
  • Experience-dependent spatial variation in mortality highlights the adaptive significance of spatial memory in wild populations.