Submitted to: Global Aquaculture Advocate
Publication Type: Trade Journal
Publication Acceptance Date: 3/2/2016
Publication Date: 3/6/2016
Citation: Green, B.W. 2016. Biofloc production technology promising in temperate zones – Channel catfish perform during winter months. Global Aquaculture Advocate. Available: http://advocate.gaalliance.org/biofloc-technology-production-promising-in-temperate-zones/.
Technical Abstract: A study was conducted to assess the feasibility to grow Channel catfish (Ictalurus punctatus) in an outdoor biofloc system during winter in a temperate zone. High biomasses of market-size channel catfish were successfully maintained through the winter with high survival and in good condition in both treatments. Net yield was negative in both treatments, but might have been positive had feeding begun at a threshold temperature of 10 deg C instead of 16 deg C. Ammonia bio-transformation persisted through the winter in biofloc waters where phytoplankton or suspended solids predominated and in the absence of sustained input of ammonia-nitrogen.