Field and Laboratory

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While considerable experimentation has been done on aquatic plant control and reduction of fish populations by chemicals, we know little of how these agents act on those smaller animals that serve as fish food…. I have attempted here to find what happens to a few of the smaller crustaceans and immature aquatic insects (as well as two of the common genera of aquatic snails) when standardized concentrations of the more commonly used herbicides are introduced into the water. I have also employed the fish poison, rotenone.

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