Benthic Macroinvertebrate Response To Grass Carp Introduction In Three Florida Lakes

Three natural lakes were studies to determine effects of grass carp (Ctenopharyngodon idella Val.) introduction on invertebrates. Benthic macroinvertebrate populations were changed after the introduction of grass carp changed the existing habitat in the 3 natural lakes. Species diversity (d), number of taxa and pollution-intolerant organisms decreased in all lakes after grass carp introduction. Macrophytes were also reduced in all study areas and several native species were eliminated. Changes in benthos corresponded to changes in water quality and aquatic vegetation.

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