Predicting Nighttime Dissolved Oxygen Decline in Ponds used for Tilapia Culture
- 1 November 1978
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 107 (6) , 804-808
- https://doi.org/10.1577/1548-8659(1978)107<804:pndodi>2.0.co;2
Abstract
A computer simulation model for predicting nighttime dissolved O2 (DO) loss was developed for manured and unmanured tilapia ponds. The model incorporated data from the literature on O2 diffusion, respiration by the planktonic community, fish and benthic organisms, and O2 consumption by organic manure. The average absolute deviation between calculated and measured DO concentrations was 0.49 mg/l for unmatured ponds and 0.38 mg/l for manured ponds. The contribution of plankton respiration to the total DO loss averaged 75% and 80% in unmanured and manured ponds, respectively. The utility of the model for predicting DO loss over a wide range of plankton densities, fish standing crops and percentage O2 saturation values at dusk was demonstrated. The nighttime DO model should apply to other fish cultures providing reliable method for estimating O2 consumption by the cultured organism(s) is available.This publication has 0 references indexed in Scilit: