United States Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
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Document Type
Article
Date of this Version
2006
Citation
North American Journal of Aquaculture (2006) 68: 47-52
doi: 10.1577/A05-031.1
Abstract
The aeration effectiveness of a diffused oxygen system was compared with that of a tractor-powered paddlewheel during eight harvests of channel catfish Ictalurus punctatus at Top Cat II Fishery in Chicot County, Arkansas. Dissolved oxygen and water temperature data were collected from a grading net aerated by the diffused oxygen system, from a grading net aerated by a paddlewheel, and from the open culture pond between the two grading nets and were not significantly different. However, comparison of estimated oxygen consumption by the biomass confined in each grading net indicated that the aeration effectiveness of the diffused oxygen system equaled or exceeded that of a paddlewheel during six field trials. An informal cost comparison indicated that a diffused oxygen system can be placed in service for a smaller capital investment than a tractor-powered paddlewheel and that the hourly operating expense of the diffused oxygen system is comparable to that of the paddlewheel. Results of the study indicate that the diffused oxygen system is a viable alternative to the tractor-powered paddlewheel for aeration of channel catfish held in grading nets.
Comments
United States government work