Analysing the growth of turbot (<Emphasis Type="Italic">Psetta maxima</Emphasis>) in a commercial recirculation system with the use of three different growth models |
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| Authors: | A Baer C Schulz I Traulsen J Krieter |
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| Institution: | 1.Institute of Animal Breeding and Husbandry,Christian-Albrechts-University,Kiel,Germany;2.GMA, Gesellschaft für Marine Aquakultur mbH,Büsum,Germany |
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| Abstract: | The growth data of a commercial aquaculture recirculation system were analysed to investigate the growth performance of reared
turbot (Psetta maxima). Three common growth models (von Bertalanffy, Gompertz and Schnute) were fitted to the growth data documented over a time
period of 6 years. To determine the most suitable model, three different criteria were used: (1) the Akaike index criterion,
(2) the sum of squared residuals and (3) the average daily deviation between the estimated final weight and the observed final
weight. The evaluation of the growth models showed that the Schnute model had the lowest Akaike index, the lowest sum of squared
residuals and the lowest daily deviation between estimated and real weight of all tested growth models. The Schnute model
produced sigmoid growth curves. The estimated growth coefficients were the most realistic ones in regard to biological interpretation.
In contrast, the von Bertalanffy growth model and the Gompertz model estimated inaccurate exponential growth curves and are
therefore unable to simulate the growth data as well as the Schnute model. The results indicate that the von Bertalanffy growth
model is not the optimal model to simulate the present growth data and that the growth potential of reared turbot has probably
not yet been fully exploited in the aquaculture system(s) examined (so far). |
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