from Part I - Evolution of Learning Processes
Published online by Cambridge University Press: 26 May 2022
Insects demonstrate an impressive repertoire of learned behaviors and are specifically suitable for studies on evolutionary processes because of their high fecundity and short life span. In this chapter I focus on the evolutionary processes that shape learning ability in insects on the relatively short-term evolutionary scale. For cognitive traits and behavior to evolve under direct natural selection the following requirements must be met: (1) variation in cognitive ability between individuals, (2) this variation is heritable, and (3) this variation is related to fitness (reproduction or survival) in specific environments. First, I describe natural variation in learning ability and how this variation can be maintained in natural populations. Second, I discuss work on heritability of cognition, as well as related studies on artificial selection and experimental evolution. Finally, I discuss the benefits and costs of learning in relation to fitness.
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