Predicting Nighttime Dissolved Oxygen Decline in Ponds used for Tilapia Culture

Autor:	Claude E. Boyd, William J. Collis, Robert P. Romaire
Rok vydání:	1978
Předmět:	food.ingredient Ecology fungi chemistry.chemical_element Tilapia Aquatic Science Plankton Biology Oxygen Absolute deviation Animal science food chemistry Benthic zone parasitic diseases Respiration O2 consumption Organic manure Ecology Evolution Behavior and Systematics
Zdroj:	Transactions of the American Fisheries Society. 107:804-808
ISSN:	1548-8659 0002-8487
DOI:	10.1577/1548-8659(1978)107<804:pndodi>2.0.co;2
Popis:	A computer simulation model for predicting nighttime dissolved oxygen (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/liter for unmanured ponds and 0.38 mg/liter 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 have universal applicability to other fish cultures provided a reliable method for estimating oxygen consumption by the cultured organism(s) is available.
Databáze:	OpenAIRE
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