Winberg revisited: convergence of routine metabolism in larval and juvenile fish

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Abstract:

We examined whether Winberg's concept of a single general model describing the relationship between mass and respiration rate in fish can be reliably extended to include larval stages (<1 mg dry weight) that were not assessed in his original analysis. To address this question, we developed an independent data set consisting of 42 sets and incorporating 25 species. Sensitivity analysis (Monte Carlo simulation) verified that the number of data sets used was more than sufficient to establish a general equation of the form sought. The resulting model converged with extrapolation of Winberg's model to the size range of interest and to extrapolation of the Clarke and Johnston model, which, like Winberg's, was restricted to postlarval fish. Thus, the generalization sought by Winberg exists. A single general model derived from first principles of the formreliably describes the relationship between respiration rate and mass for fishes over the size range 1-108 µg dry weight. The curvilinearity of this model reflects the reality that the mass exponent in the relationship between body size and respiration rate decreases during ontogeny.

Selon Winberg, il existe un modèle général unique qui décrit la relation entre la masse et le taux de respiration chez les poissons. Nous avons regardé si le modèle pouvait être étendu afin de tenir compte des larves de poissons non incluses dans l'analyse originale. Pour ce faire, nous avons monté une banque de données indépendantes composée de 42 séries de mesures sur 25 espèces. Une analyse de sensibilité (simulation de Monte Carlo) a permis de vérifier si le nombre de séries de données que nous avons utilisé était suffisant pour établir une équation du type requis. Le modèle obtenu convergeait avec l'extrapolation du modèle de Winberg pour les tailles visées et celle du modèle de Clarke et Johnston, les deux modèles ayant été développés pour des poissons qui ont terminé leur vie larvaire. La généralisation recherchée par Winberg existe donc. Un modèle général unique dérivé des principes premiers de la formedécrit efficacement la relation qui existe entre le taux de respiration et la masse chez les poissons dont la masse sèche varie entre 1 à 108 µg. La curvilinéarité du modèle souligne le fait que l'exposant de la masse dans la relation entre la taille du corps et le taux de respiration décline durant l'ontogenèse.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: January 1, 2001

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  • Published continuously since 1901 (under various titles), this monthly journal is the primary publishing vehicle for the multidisciplinary field of aquatic sciences. It publishes perspectives (syntheses, critiques, and re-evaluations), discussions (comments and replies), articles, and rapid communications, relating to current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems. The journal seeks to amplify, modify, question, or redirect accumulated knowledge in the field of fisheries and aquatic science. Occasional supplements are dedicated to single topics or to proceedings of international symposia.
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