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Earlier work on the factors influencing inhibition of activation of the spermatozoa of Salmo gairdnerii has been confirmed. Diluents containing K + and of pH less than 7.8 do not activate the spermatozoa. The presence of Na + in the diluent has a mildly antagonistic effect on this inhibition. It has now been demonstrated that both Ca 2+ and Mg 2+ markedly antagonize the inhibition due to low pH and K ‐ . It is suggested that inhibition due to potassium salts could account for the inhibition previously attributed to Androgamone I.
Baynes et al. (Tue,) studied this question.