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The food habits, metabolic rate and growth rate of juvenile scup (Stenotomus chrysops (L.)) in Narragansett Bay, R.I. were studied during the summer of 1987. The instantaneous gastric evacuation rate of this demersal fish species was determined in the laboratory. The linear estimate of this rate was 0.17/hour and the exponential estimate was 0.34/hour. Field studies were performed to determine the feeding periodicity of juvenile members of this species and the types of prey consumed. Scup were found to be daytime and therefore probably visual feeders. The types of prey consumed included polychaetes, mysids and other crustacea, molluscs, and fish eggs and larvae. Variation in the relative amounts of each prey type throughout a season indicated that this species is probably an opportunistic feeder. The daily ration was determined by combining data from the gastric evacuation study with a 24 hour field study. Two estimates of daily ration were obtained depending on the type of evacuation model used. The linear estimate of daily ration was 3.99% dry weight and the exponential estimate was 3.49% dry weight. The benthic consumption rate of scup in Narragansett Bay was found to equal 0.6-1.7 g dry wt/m2 between June 1st and September 30th.

The Biology of Juvenile Scup (Stenotomus chrysops (L.)) in Narragansett Bay, R.I.: Food Habits, Metabolic Rate and Growth Rate