2004 Annual Report 4.What were the most significant accomplishments this past year? D. This report serves to document research conducted under a Specific Cooperative Agreement(#58-6402-4-075; CRIS #6402-13320-002-06S) which was established on June 16, 2004 under this parent CRIS between ARS and the University of Nebraska-Lincoln (Nebraska). Additional details of research can be found in the report for the parent CRIS 6402-13320-002-00D, Optimizing Catfish/Water Quality Interactions to Increase Catfish Production Efficiency. This project will terminate on April 30,2006. Remote sensing methods have not been developed to detect cyanobacterial blooms, the major type of harmful algal blooms in catfish production systems. The approach will be to model data from field collections made at the TCNWAC field facility (data from 2003), and compare model efficacy using 2004 data. Data has been provided to the collaborator from the 2003 collection period.