Data from: Generalized movement strategies for constrained consumers: ignoring fitness can be adaptive
Galanthay, Theodore E.; Flaxman, Samuel M. (2011), Data from: Generalized movement strategies for constrained consumers: ignoring fitness can be adaptive, Dryad, Dataset, https://doi.org/10.5061/dryad.hd301f6n
Movements made by real organisms---such as movements involved in dispersal, migration, and habitat selection---are expected to be suboptimal occasionally due to realistic constraints imposed by incomplete information, perceptual limitations, and stochasticity. Previous theory considering such constraints has shown that movements appropriately conditioned upon habitat or resource characteristics can balance out suboptimal components of movement and thereby lead organisms to ideal free distributions and fitness maxima, whereas movements conditioned upon fitness differentials cannot. These findings suggest a somewhat paradoxical hypothesis: even if organisms have information about their fitness, movement strategies that maximize fitness may be conditioned upon something other than fitness per se. We test this hypothesis by investigating the evolutionary stability of generalized, conditional movement strategies that vary in their use of information on fitness versus information on habitat characteristics. We show that when costs of sensory machinery are included, natural selection should favor movement strategies that completely ignore fitness information. Finally, we synthesize previous work by showing how several previous important theoretical results on adaptive movement strategies are united under our one general model.