Title: Effect of daily minimum pond dissolved oxygen concentration on hybrid striped bass fingerling yield Authors
Submitted to: Book of Abstracts Aquaculture America
Publication Type: Abstract Only
Publication Acceptance Date: September 25, 2012
Publication Date: February 21, 2013
Citation: Green, B.W., Fuller, S.A., Mcentire, M.E. 2013. Effect of daily minimum pond dissolved oxygen concentration on hybrid striped bass fingerling yield [abstract]. Book of Abstracts Aquaculture America 2013: Strike a Chord for Sustainable Aquaculture, February 21-25, 2013, Nashville, Tennessee. p.428. Technical Abstract: Management of dissolved oxygen (DO) concentration in ponds at night during the growing season is important because fish growth and yield are greater in ponds with higher nightly DO concentrations. The purpose of this study was to quantify the production and water quality responses of hybrid striped bass (Morone chrysops x M. saxatilis) fingerlings exposed to a range of daily minimum pond DO concentrations. Fish (mean weight 16.4 g/fish; mean total length 99.4 mm/fish) were stocked into 9 0.04-ha earthen ponds at 12,662 fish/ha. Three replicate ponds were assigned randomly to each minimum dissolved oxygen concentration treatment. Minimum dissolved oxygen concentration in each pond was maintained by an electric paddlewheel aerator (13.8 kW/ha) that was activated by data logger to maintain a minimum dissolved oxygen concentration of 25%, 40%, or 55% of saturation. Fish were fed daily as much 46% protein feed as they would consume in a 20-min period. Water quality was monitored weekly. Hybrid striped bass fingerling growth was impacted by minimum pond dissolved oxygen concentration. Fish in the high dissolved oxygen treatment consumed more feed and grew faster than those in the low dissolved oxygen treatment.