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Patch discrimination as a function of handling time
1Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742, USA.
Poultry Science
|February 14, 2007
Summary
Broiler chickens adjust foraging behavior based on feed profitability and competitor numbers. Birds preferred patches requiring less handling time, demonstrating an ability to assess resource value and competition dynamics.
Area of Science:
- Animal Behavior
- Avian Ecology
- Foraging Theory
Background:
- Understanding foraging decisions in broiler chickens is crucial for optimizing welfare and productivity.
- Group size (GS) and feed handling time can influence resource competition and patch selection.
Purpose of the Study:
- To investigate how group size and feed handling time affect patch choice in broiler chickens.
- To determine if broiler chickens can discriminate between patches with varying profitability based on handling time.
Main Methods:
- Male broiler chickens were tested in three different group sizes (GS).
- A three-patch discrimination trial was used with patches varying in filler content (affecting handling time and profitability).
- Key behavioral metrics including food consumption, foraging duration, and patch residence time were recorded.
Main Results:
- Broiler chickens significantly preferred patches requiring less handling time (higher profitability).
- Food consumption and foraging activity were higher in more profitable patches.
- Larger group sizes led to more birds utilizing all patches, but aggression increased only with decreased handling time, suggesting scramble competition.
Conclusions:
- Broiler chickens can assess the handling time required for feed acquisition and adjust foraging behavior accordingly.
- Resource monopolization was not observed; birds engaged in scramble competition, especially at profitable patches.
- Findings highlight the interplay between group size, resource profitability, and competition in shaping broiler chicken foraging strategies.
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