Publication
Bio-energetic modeling of growth and waste production of Nile tilapia (Oreochromis niloticus L.) in recirculation systems
Details
Author(s):
M.C.J. Verdegem; A.A. van Dam; A.A. Cabarcas-Nunez; L. Oprea
Type of Document:
Conference Proceeding or Document
Publisher/Journal:
American Tilapia Association and Departamento de Pesca e Aquicultura/Ministerio da Agricultura e do Abastecimento
Date of Publication:
n.d.
Place of Publication:
Rio de Janeiro, Brazil
Links
Description
Abstract: A bio-energetic fish growth simulation (FGS) model was developed for Clarias gariepinus and
subsequently adjusted for the culture of Oreochromis niloticus, Oncorhynchus mykiss and Colossoma macropomum. The FGS model was extended with a fish waste module (FWM) to calculate the total waste production due to feeding by tilapias grown in indoor recirculation systems. Wastes calculated included the amount of uneaten feed, feces and NH4+ production. The amounts of wastes produced were expressed as g nitrogen (N). The model was calibrated and validated using 3 independent data sets, together comprising 175 aquarium experiments, monitoring growth in all cases and changes in proximate body composition of O. niloticus between stocking and harvesting in 51 cases. Fishes were grown in the individual weight range of 1
