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A randomized design was used to test the difference in growth rates of juvenile green sunfish (Lepomis cyanellus) subjected to three treatments (food ration, temperature and salinity). Food ration and water temperature were similarly important in affecting growth of juvenile green sunfish. Juvenile green sunfish were found to accomplish similar growth with scarce food and optimum temperature as with abundant food and sub-optimum temperature. This equal and independent relation to biotic and abiotic factors should be expected in a ubiquitous generalist species, such as green sunfish.