Fig. 3. Effects of cross adaptation to Mg²⁺ on olfactory responses to Ca²⁺ in Carassius auratus. Two consecutive olfactory electroencephalogram (EEG) responses (lower traces) and their integrated activities (upper traces) to 10 mmol l^-1 Ca²⁺ (black horizontal bars) in the absence (open horizontal bar) and presence (shaded horizontal bar) of 100 mmol Mg²⁺. Note that the response to calcium is bluntened, but not abolished, in the presence of excess Mg²⁺.

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