What do you think for the use of rotifers as bio-indicators water quality in fish pond? We know that some species are have been designated as indicators of Eutrophy, and knowledge about morphological variations and physiological conditions of rotifers should be studied and then they can be used as better indicators of environmental quality.
Amartya K Saha
A community dominated by rotifers usually accompanies eutrophication, and hence, rotifers / nematodes and absence of other aq macroinverts could indicate undesirable water quality (as eutrophication = excess algae growth whose decomposition lowers dissolved oxygen for fish etc)..
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