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Preliminary Study on the Water Drag of Schlegel＇s Black Rockfish Sebastes schlegeli

Drag forces acting on Schlegel's black rockfish Sebastes schlegeli were studied. A new drag force transducer was designed and used to measure the water drag on Schlegel's black rockfish in a vertical recirculating flume tank. Fourteen individuals were investigated, yielding two mean drag coefficients referred to the cross-sectional area and volume2/3 respectivelyat water velocities ranging from 0.3 to 1.0 m s-1. The drag coefficients can be used for estimating the drag forces acting on Sebastes schlegeli in water.