A two-stage growth model for gilthead sea bream (Sparus aurata) based on the thermal growth coefficient

作者：Mayer P; Estruch V D^*; Jover M

来源：Aquaculture, 2012, 358: 6-13.

DOI：10.1016/j.aquaculture.2012.06.016

• Mathematical model
• Seasonal growth
• Temperature curve
• Marine cages production

Several authors have proposed models to describe fish growth taking the influence of temperature into account, and one of the most interesting is the %26quot;thermal unit growth coefficient%26quot; (TGC). Recent research has demonstrated that TGC varies throughout the growth cycle of fish, making it necessary to establish different stanzas. In this work, the original TGC model using 1/3 as an exponent was compared with a new model considering 2/3. Likewise, two stages for the growth of gilthead sea bream under commercial conditions in marine farms were detected by means of TGC seasonal models using the continuous temperature curve. A critical value for weight around 117g was obtained, which could mark the transition between two growth dynamics. To describe the weight evolution during a complete production cycle, the two growth stages were described by two separate seasonal TGC models (1/3-TGC model and 2/3-TGC model), and with an integrated model named the Mixed-TGC model, which presents interesting properties of continuity and differentiability and could be an important tool for fish farm management.

• 出版日期2012-8-15