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Table 2 Changes in behaviours, reserves, and other individual properties when parameters are increased in asymmetric models. The parameters specific to player two were systematically altered as detailed in the methods section. Results given come from visual inspection of result sets: '↑↑' denotes a strong tendency for the property to increase with an increase in the parameter investigated; '↑' denotes a noisier but visible increase; '↓↓' denotes a strong tendency for the property to decrease; '↓' denotes a noisier but visible decrease; '-' denotes that the value of the property investigated did not change in response to changes in the value of the parameter; and '×' denotes that changes in the value of the parameter led to unpredictable changes in the property measured. Note that in the columns referring to changes in player two's metabolic cost of resting and predation risk whilst resting, the parameter value systematically being increased is lower than that of player one: this leads to the difference between the parameter values of the two players becoming smaller as the value of player two's parameter increases. In the other four columns, player two's parameter is greater than that of player one, and so an increase in its value leads to an increase in the difference between the values for the two players.

From: The emergence of leaders and followers in foraging pairs when the qualities of individuals differ

Property Changes in property in response to
  Increase in Increase in Increase in predation risk when
  Energetic gain Foraging cost Resting cost Foraging alone Foraging together Resting
Likelihood player one forages ↓↓ ↑↑ ↑↑ × -
   Player two forages ↓↓ ↑↑ ↑↑ ↓↓ ↑↑
Likelihood both players forage ↓↓ ↑↑ ↑↑ ↓↓ ↑↑
   One forages, two rests ↓↓ - ↑↑ ↓↓
   One rests, two forages ↓↓ × ↑↑
   Both players rest ↑↑ ↓↓ ↓↓ ↑↑ × ↓↓
Synchrony coefficient, D' × - ×
Mean energy reserves player one ↓↓ ↑↑ ↓↓ × ×
   Player two ↑↑ ↓↓ ↓↓ ↓↓
Immediate energy reserves difference within pair × ↑↑ -
Length of time player one repeats behaviour - - - -
Length of time player two repeats behaviour × ↓↓ -
C – Player one ↓↓ ↑↑ ↑↑ ↓↓
   Player two ↓↓ ↑↑ ↑↑ ↓↓
S – Player one ↓↓ ↑↑ ↑↑ × ↓↓
   Player two ×