Abstract

The learning behaviour and memory formation of ectotherms, especially of fish, depend significantly on the acclimation temperature. Although temperature is known to affect different physiological factors in the nervous system, the exact manner in which memory and learning are affected by these alterations is not clear. Large variations in the acclimation time before learning takes place, are striking. With regard to long-lasting compensatory changes in the polarity of membrane-bound neuronal gangliosides (1) and in the bio-electrical activity of the CNS (post-synaptic potential amplitudes (2)) following thermal acclimation it was of interest to investigate the time course of acclimation on the learning ability of fish subjected to a new environmental temperature.

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