I have worked out the bio-availability of Cu, Ni, Fe, Co, Mn, Cr and Zn in 3 different water bodies and their accumulation in the model fish channa punctatus. I don't get any trend in relation to availability and accumulation in tissues. Can anybody tell me whether any relationship exists between these two?
If i am not wrong , i may see from the other side. It might be due to the constancy or saturation level intake of bio organisms irrespective of the concentrations of the source of heavy metals.
I assume you calculated aqueous bioavailability? If you are working in wild systems and/or wild fish, a large portion of the accumulation will be through diet, which is much more complex to predict. You can back-calculate uptake from concentrations in stomach contents, but predictive models of accumulation through the gut are extremely complex because of the very complex and variable nature of the gut environment.
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