Rainbow trout, Salmo gairdnerii Richardson, spermatozoa: effects of cations and pH on motility

Authors

  • S. M. Baynes,

    1. Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research, Fisheries Laboratory, Lowestoft, Suffolk NR33 OHT, U.K.
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  • A. P. Scott,

    1. Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research, Fisheries Laboratory, Lowestoft, Suffolk NR33 OHT, U.K.
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  • A. P. Dawson

    1. Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research, Fisheries Laboratory, Lowestoft, Suffolk NR33 OHT, U.K.
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    • *

      School of Biological Sciences, University of East Anglia, Norwich, Norfolk, NR4 7TJ, U.K.


Abstract

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 Ca2+ and Mg2+ 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.

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