Abstract
An individual-based model for Sparus aurata was developed, taking into account the effects on the growth rate of water temperature, food availability and diet composition. The model was identified on the basis of the recent literature regarding the physiological ecology of this species. It was subsequently calibrated and validated by using original field data collected at two Italian fish farms located, respectively, in the Adriatic and Tyrrhenian Seas. The mass budget of uneaten food and faeces was computed using the model at each farm: the optimal ingestion rate of a fish was computed based on its wet weight and the temperature of the water, while the faeces estimation considered the different digestibility of lipids, carbohydrates and proteins in the diet. From an applied perspective, the future use of this growth model in relation to mariculture site selection and monitoring might typically be to estimate both the yield and the amount of uneaten food and faeces discharged from a fish cage. This second output represents a useful input for deposition models which are routinely used in the field of mariculture monitoring by different EU countries. The integration of growth and deposition models in a single system could provide a useful tool for the site-selection and monitoring of finfish mariculture operations in Mediterranean environments.
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Acknowledgments
This work was partially funded by EU project no. 006540 (ECASA, http://www.ecasa.org.uk). The authors would like to thank Dr. Simone Libralato at OGS Trieste for the help given in the early stages of the model development. The authors would also like to thank the personnel at “Il Vigneto” farm in Porto Ercole and the “Co. Pro. Mar.” farm in Bisceglie for actively collaborating in carrying out the field work.
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Brigolin, D., Pastres, R., Tomassetti, P. et al. Modelling the biomass yield and the impact of seabream mariculture in the Adriatic and Tyrrhenian Seas (Italy). Aquacult Int 18, 149–163 (2010). https://doi.org/10.1007/s10499-008-9232-4
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DOI: https://doi.org/10.1007/s10499-008-9232-4