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Skill trade-offs promote persistent individual differences and specialized tactics.

Frédérique Dubois1

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Individual differences in competitive and cognitive abilities drive foraging tactic specialization. A trade-off between these traits explains the coexistence of different foraging strategies in animal populations.

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Area of Science:

  • Behavioral Ecology
  • Evolutionary Biology
  • Animal Cognition

Background:

  • Individual variation in behavioral performance is common but poorly understood.
  • The producer-scrounger (PS) paradigm models interactions between individuals searching for resources versus exploiting others' discoveries.

Purpose of the Study:

  • To investigate if trade-offs between cognitive and competitive abilities explain individual differences in foraging tactics.
  • To determine if these trade-offs create disruptive selection, maintaining diverse strategies.

Main Methods:

  • Utilized the producer-scrounger (PS) paradigm to analyze foraging behavior.
  • Modeled the relationship between cognitive traits (finding food) and competitive traits (stealing food).

Main Results:

  • Individual differences in competitiveness can explain short-term specialization in foraging tactics.
  • Stronger competitors may favor scrounging, while weaker competitors may favor producing, especially with low finder's advantage.

Conclusions:

  • A trade-off between competitive and cognitive abilities is necessary for persistent individual specialization.
  • Social and ecological contexts influence the degree of behavioral specialization.
  • Understanding alternative tactics is crucial for predicting trait evolution, including cognitive traits.