QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by WEBB, P. W. Search for Related Content PubMed Articles by WEBB, P. W.

Journal of Experimental Biology 96,93-106 (1982)
Published by Company of Biologists 1982

Fast-Start Resistance of Trout

P. W. WEBB ¹

¹ University of Michigan, School of Natural Resources, Ann Arbor, Michigan 48109

Rainbow trout (Salmo gairdneri Richardson) with a body mass of 268 ± 36 g were used to determine the acceleration resistance of a fish during fast-starts. The mass of the fish was increased by mass loads of 75, 150, 225 and 335 g. The loads were made from nesting horseshoe-shaped brass saddles which fitted snugly over the fish so that the extra mass was equally distributed in all planes about the stretched-straight body centre of mass. The weight of the saddles was taken up by a 291 cm line attached to the dorsal surface of the fish above its centre of mass. The other end of the line was attached to the ceiling. The performance of the fish with and without saddles was measured during fast-starts, initiated by a 1 v.cm^-1 d.c. electric shock. Performance was determined in terms of the distance travelled with time, measured from high speed movie films (240 frames s^-1). The relationships between distance travelled and time were described by power functions for fish with and without mass loads. Exponents were not significantly different for the fish with various mass loads showing that frictional and form drag made negligible contributions to acceleration resistance in a fast-start. The resistance of the fish in a fast-start, due to fish mass and a resistance component of added water mass (apparent mass), was calculated using hydromechanical theory for representative fast-start sequences. The apparent mass was estimated at 320 g, which is 1.2xfish body mass.

This article has been cited by other articles:

				R. W. Blake and K. H. S. Chan Swimming in the upside down catfish Synodontis nigriventris: it matters which way is up J. Exp. Biol., September 1, 2007; 210(17): 2979 - 2989. [Abstract] [Full Text] [PDF]

				M. J. McHenry and G. V. Lauder The mechanical scaling of coasting in zebrafish (Danio rerio) J. Exp. Biol., June 15, 2005; 208(12): 2289 - 2301. [Abstract] [Full Text] [PDF]

				J. O. Dabiri and M. Gharib Sensitivity analysis of kinematic approximations in dynamic medusan swimming models J. Exp. Biol., October 15, 2003; 206(20): 3675 - 3680. [Abstract] [Full Text] [PDF]