Comparative metabolic rates of common western North Atlantic Ocean sciaenid fishes

Authors

  • A. Z. Horodysky,

    Corresponding author
    1. Department of Fisheries Science, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, U.S.A.
      Author to whom correspondence should be addressed at present address: Living Marine Resources Cooperative Science Center, Department of Marine and Environmental Science, Hampton University, Hampton, VA, U.S.A. Tel.: +1 757 728-6665; email: andrij.horodysky@hamptonu.edu
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  • R. W. Brill,

    1. Cooperative Marine Education and Research Program, Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, Woods Hole, MA, U.S.A.
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  • P. G. Bushnell,

    1. Department of Biological Sciences, Indiana University South Bend, South Bend, IN, U.S.A.
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  • J. A. Musick,

    1. Department of Fisheries Science, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, U.S.A.
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  • R. J. Latour

    1. Department of Fisheries Science, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, U.S.A.
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Author to whom correspondence should be addressed at present address: Living Marine Resources Cooperative Science Center, Department of Marine and Environmental Science, Hampton University, Hampton, VA, U.S.A. Tel.: +1 757 728-6665; email: andrij.horodysky@hamptonu.edu

Abstract

The resting metabolic rates (RR) of western North Atlantic Ocean sciaenids, such as Atlantic croaker Micropogonias undulatus, spot Leiostomus xanthurus and kingfishes Menticirrhus spp., as well as the active metabolic rates (RA) of M. undulatus and L. xanthurus were investigated to facilitate inter and intraspecific comparisons of their energetic ecology. The RR of M. undulatus and L. xanthurus were typical for fishes with similar lifestyles. The RR of Menticirrhus spp. were elevated relative to those of M. undulatus and L. xanthurus, but below those of high-energy-demand species such as tunas Thunnus spp. and dolphinfish Coryphaena hippurus. Repeated-measures non-linear mixed-effects models were applied to account for within-individual autocorrelation and corrected for non-constant variance typical of noisy RA data sets. Repeated-measures models incorporating autoregressive first-order [AR(1)] and autoregressive moving average (ARMA) covariances provided significantly superior fits, more precise parameter estimates (i.e. reduced s.e.) and y-intercept estimates that more closely approximated measured RR for M. undulatus and L. xanthurus than standard least-squares regression procedures.

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