Comparative metabolic rates of common western North Atlantic Ocean sciaenid fishes

• Main Authors: Horodysky, A. Z., Brill, R. W., Bushnell, P. G., Musick, Jack A., Latour, R. J.
• Format: Text
• Language: unknown
• Published: W&M ScholarWorks 2011
• Subjects: intermittent-flow respirometry; metabolism; mixed-effects models; repeated measures; Sciaenidae; Fisheries Science Peer-Reviewed Articles; Aquaculture and Fisheries; North Atlantic
• Online Access: https://scholarworks.wm.edu/vimsarticles/2068; https://doi.org/10.1111/j.1095-8649.2011.03017.x; https://scholarworks.wm.edu/context/vimsarticles/article/3066/viewcontent/j.1095_8649.2011.03017.x.pdf

The resting metabolic rates (R ) 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 (R ) of M. undulatus and L. xanthurus were investigated to facilitate inter and intraspecific comparisons of their energetic ecology. The R of M. undulatus and L. xanthurus were typical for fishes with similar lifestyles. The R 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 R 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 R for M. undulatus and L. xanthurus than standard least-squares regression procedures.