Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Scaling of pectoral fins in the genus Sebastes
Student Author(s): Goldstein, Dov
Faculty Advisor(s): Denny, Mark
Pages: 37
Location: Final Papers Biology 175H
Date: June 1989
Keywords: nearshore fishes
Abstract: A study of scaling of the pectoral fins in the genus Sebastes was conducted using 12 fish from a wide variety of species and ranging from 15.5 grams to 2891.0 grams. Measurements were made of angular velocity and an average drag coefficient. The angular velocity was found to be independent of body mass and was 7.85 radians per second. The average drag coeffecient was 0.0096. Measurements of total wet surface area and body length were made and were plotted as functions of body mass. The results show that the body of the fish is scaling isometrically. Measurements of pectoral fin area, radius, large muscle length, small muscle length, and muscle mass were made and plotted as functions of body mass. The results show that the pectoral fin is scaling isometrically. A model of a single pectoral fin power stroke of a fish was constructed. The model was used to generate velocity time plots for six hypothetical fish. The results suggest that the maximal velocity scales isometrically.