The critical swimming speed of Iberian barbel Barbus bocagei in relation to size and sex

Authors

  • C. S. Mateus,

    1. * Institute of Oceanography, Centre of Oceanography, Faculty of Sciences of the University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal and Biology Department, University of Évora, 7002-554 Évora, Portugal
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  • B. R. Quintella,

    Corresponding author
    1. * Institute of Oceanography, Centre of Oceanography, Faculty of Sciences of the University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal and Biology Department, University of Évora, 7002-554 Évora, Portugal
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  • P. R. Almeida

    1. * Institute of Oceanography, Centre of Oceanography, Faculty of Sciences of the University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal and Biology Department, University of Évora, 7002-554 Évora, Portugal
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‡Tel.: + 351 217 500 146; fax: + 351 217 500 009; email: bquintella@netcabo.pt

Abstract

The swimming capacity of Barbus bocagei was measured with the critical swimming speed (Ucrit) standard test in a modified Blažka-type swim tunnel. Sixty B. bocagei were tested and they exhibited a mean ±s.d. Ucrit of 0·81 ± 0·11 m s−1 or 3·1 ± 0·86 total lengths per second (LT s−1). Sex had no effect on Ucrit but significant differences were found between the swimming performance of fish with distinct sizes.

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