SUMMARY—Carp (Cyprinus carpio Linnaeus) were transferred from a river site receiving little industrial effluent (control fish) and from a location receiving effluents from a major municipality (test fish) to a spring‐fed and to a run‐off pond. Holding for as long as 18 days in either pond failed to improve the aroma or flavor of test carp. The over‐all mean score for flavor of control fish was higher (P<0.05) than for test fish. Mean scores for flavor were higher for carp held in the spring‐fed pond than for those in the runoff pond but this difference was significant (P<0.05) only for the
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