Submitted to: North American Journal of Aquaculture
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/11/2006
Publication Date: 1/10/2007
Citation: Pearson, P.R., Beecham, R.V. 2007. Estimating liquid oxygen requirements for aeration of fasted channel catfish. North American Journal of Aquaculture. 69:41-43.
Interpretive Summary: A Microsoft Excel© spreadsheet, based on the results of scientific experiments, estimates the volume of oxygen consumed by a given biomass of channel catfish Ictalurus punctatus during a specified time period. Users enter the water column temperature, an estimate of catch weight, average individual live fish weight, diffuser efficiency, and the expected holding period. Channel catfish farmers and transporters of live fish can use computed values as a guide for setting aerator flow rates in grading nets and haul tanks, respectfully. Users of liquid oxygen can estimate liquid oxygen expense and the ratio of liquid oxygen expense to gross revenue by entering the unit sale price for the fish, the cost of one gallon of liquid oxygen, and a per unit value for amortization of capital investment in liquid oxygen equipment.
Technical Abstract: A review of scientific literature concerning channel catfish Ictalurus punctatus respiration resulted in development of a Microsoft Excel© spreadsheet for estimating the volume of oxygen consumed by a given fasted channel catfish biomass. Channel catfish farmers and live haulers using diffused oxygen aeration systems can use computed estimates of oxygen consumption as a guide for setting flow rates for diffusers placed in grading nets and haul tanks. Entry of eight variables into the spreadsheet provides estimates of oxygen gas consumption with respect to time and biomass, the liquid oxygen equivalent of that volume, liquid oxygen expense, and the ratio of liquid oxygen expense to gross revenue.