Fish Growth Model with Feed Quality Factor in Wastewater Oxidation Pond

Full Text PDF PDF
Author(s) Bayu Tara Wijaya | Isnani Darti | Agus Widodo
Pages 93-98
Volume 4
Issue 3
Date March, 2015
Keywords Fish Growth Models, Oxidation Pond, Feed Quality, Bod, Food Assimilation Efficiency
Abstract

The present paper describes the fish growth model which is including new parameters, i.e. feed quality (q) are determined based on nitrogen-carbon ratio. The model is analyzed in form of differential equation model of fish growth in wastewater oxidation ponds views from the aspect of anabolism and catabolism individually. Function q is proportional to food assimilation efficiency (b), a percentage of assimilated feed for catabolism, and rate of feed intake. Fish growth models are constructed, be applied to growth Nile tilapia (Oreochromis niloticus). Fish growth model will decrease if nitrogen-carbon ratio which is produced by fish during limited nitrogen have greater than nitrogen-carbon ratio in fish, otherwise will increase if nitrogen-carbon ratio which is produced by fish during limited nitrogen have smaller than nitrogen-carbon ratio in fish. Decreasing growth, also influenced by the function b are relatively small and biochemical oxygen demand (BOD) values are enough high. Overall the results of simulations and observations, the parameter q has fair influence to the fish growth model with condition that b function has greater, and BOD values close to BODmax values.

< Back to March Issue