Spontaneous rhythmical impedance changes in the trout’s egg

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Abstract
Unfertilized and fertilized eggs of the rainbow trout show spontaneous periodic changes of impedance. At an input frequency of 3000 cycles the maximum change in impedance per egg cycle corresponds to an approximate 0.4% impedance change in the equivalent parallel resistance and capacitance network in the standard arm of the bridge. The maximum capacitance and resistance changes in the latter are approximately 4.0 and 0.4% respectively. The frequency of impedance change is about 1.5 min. The effect occurs only alter about 7 hr. immersion in water. Killing the egg abolishes the effect. An increase in temp. increases the frequency and vice versa.

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