Related Experiment Video
Updated: Jul 10, 2026
08:23
Assessing Burrowing, Nest Construction, and Hoarding in Mice
Published on: January 5, 2012
Influence of pellet size on rat's hoarding behavior
1Faculty of Medicine, Département de Physiologie, Université Laval, Québec, Canada G1K 7P4.
Physiology & Behavior
|July 28, 2004
Summary
Food pellet size does not affect the body weight threshold for rat hoarding behavior. However, rats adjust their hoarding effort based on pellet size, indicating a flexible response to food deprivation.
Area of Science:
- Animal Behavior
- Neuroscience
- Physiology
Background:
- Hoarding behavior in rats is a key indicator of body weight regulation.
- Understanding factors influencing hoarding is crucial for studying appetite and energy balance.
Purpose of the Study:
- To investigate if food pellet size influences rat hoarding behavior and thresholds.
- To determine the relationship between food deprivation, pellet size, and hoarding effort.
Main Methods:
- Rats were offered large (5g) or small (2g) food pellets, with body weights maintained within a narrow range.
- Hoarding thresholds were assessed, and the relationship between hoarded food mass and body mass was analyzed.
- Experiment 2 verified findings by counting pellets instead of weighing hoarded food.
Main Results:
- Food pellet size did not significantly alter the hoarding threshold.
- A significant difference was observed in the relationship between hoarded food and body mass based on pellet size (ratio of 2.7).
- Counting pellets yielded similar results to weighing hoarded food, confirming its reliability as an indicator.
Conclusions:
- Hoarding threshold is independent of food pellet size.
- Rats exhibit a flexible hoarding strategy, increasing search effort with greater food deprivation, irrespective of pellet size.
- Weighing hoarded food is a reliable measure for quantifying hoarding behavior in rats.
