from Part I - Evolution of Learning Processes
Published online by Cambridge University Press: 26 May 2022
Although reductionistic studies of mechanisms of learning in a broad range of model species have advanced our understanding of neural mechanisms, our integrated understanding of mechanisms, behavior, ecology, and evolution of learning remains patchy. A more wholistic research approach in a model lineage of species related to the sea hare, Aplysia californica, has revealed a complete loss of mechanisms of sensitization in one sea-hare genus, Dolabrifera, with concomitant changes in its behavior and ecology. A partial loss of sensitization via different mechanisms in a sister genus, Phyllaplysia, provides further information for our evolving understanding of the evolution of learning and memory. Does a relatively specific “change in diet” hypothesis, or a more universal “generalist versus specialist” hypothesis better predict the patterns? Further analyses of sensitization in a half-dozen additional sea-hare genera will distinguish the predictive powers of these and other synthetic evolutionary theories.
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