An analysis of the ion-exchange characteristics of fish-egg chorions.
The chorions of rainbow trout were investigated to measure their ion-exchange characteristics. These characteristics have been incorporated into a model, based on ion-exchange theory, which attempts to describe interactions between chorions and a range of water qualities, in terms of the distribution of K(+). The model was tested by comparing predicted K(+) accumulation by chorions with that actually measured in experimental conditions. The model successfully predicted the influence of combinations of K(+) and Ca(2+) on K(+) accumulation, and was able to predict the direction of changes in K(+) accumulation in the presence of aluminium and low pH.
Dept. of Biological Sciences, University of Buckingham, MK18 1EG, Buckingham, England.
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Shephard