Biphasic Retention of One-Trial Learning in a Clonal Fish (<Emphasis Type="Italic">Poecilia formosa</Emphasis>) |
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Authors: | W H RIEGE A CHERKIN |
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Institution: | 1.Psychobiology Research laboratory,Veterans Administration Hospital,Sepulveda;2.Psychobiology Research laboratory,Veterans Administration Hospital,Sepulveda;3.Department of Anesthesiology,University of California School of Medicine,Los Angeles |
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Abstract: | Most species used for behavioural studies are bisexual. Sexual dimorphism determines genotypic diversity and behavioural variation within a species. The relative contribution of a genome to a specific behaviour is for the most part indiscernible, but gene changes can alter behaviour in many different ways1. Within a species, strain differences can contribute to behavioural differences and many less clearly systematic behaviours, such as the aptitude to learn or to recall, may be genetically determined2. Genotypic diversity, on the other hand, obscures gene correlates of behaviour because each organism brings a unique repertoire of behaviours to the experimental situation. Against this, learning research has found basic phenomena of learning and memory to be valid across many vertebrate species. In an effort to reduce genotypic and behavioural variability in studying memory processing, we have used a unisexual clonal fish, Poecilia formosa, as suggested by Agranoff and Davis3. |
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