U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Natural Products Utilization Research: Oxford, MS
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Location Research Units
                        National Sedimentation Laboratory
                                    Natural Products Utilization Research Unit
                                    Water Quality and Ecology Research Unit
                                    Watershed Physical Processes Research UnitSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Oxford, Mississippi Natural Products Utilization Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Schrader, Kevinitem
                                            TUCKER, CRAIG - MS STATE UNIV.item
                                            MISCHKE, CHARLES - MS STATE UNIV.
  Submitted to: Water Science and Technology
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 1/26/2007
                                    Publication  Date: 9/13/2007
                                    Citation: Schrader, K., Tucker, C.S., Mischke, C.C. 2007. Preliminary Pond Evaluation of a Natural-Based Algicide for Managing Musty Off-Flavor in Channel Catfish Aquaculture. Water Science and Technology. V. 69:360-366.Interpretive Summary: A patented, natural-based algicide was tested in a catfish aquaculture pond for its effectiveness in reducing the abundance of a type of blue-green algae that causes musty "off-flavor" in farm-raised channel catfish in Mississippi and Alabama.  This patented algicide was found to be effective in reducing the abundance of the musty blue-green alga in catfish pond water and subsequently helped reduced levels of the musty-odor compound in the flesh of the channel catfish.
                                Technical Abstract: Environmentally-derived "off-flavors" such as "earthy" and "musty" in channel catfish aquaculture are attributed to the presence of certain species of cyanobacteria (blue-green algae) in the catfish ponds.  Most catfish producers manage off-flavor episodes by the application of algicides; however, these algicides have high environmental persistence and broad-spectrum toxicity.  Recent research has discovered several natural and natural-based quinones that are effective and selective in reducing the abundance of the MIB-producing cyanobacterium Oscillatoria perornata.  In this study, efficacy testing of one of these quinones, anthraquinone-59, in a catfish pond found that it is effective in reducing O. perornata and MIB levels.  Also, anthraquinone-59 and the commercial product SeaKleen(trademark) which contains a water-soluble derivative of menadione (vitamin K3 or 2-methyl-1,4-naphthoquinone) were evaluated using a laboratory bioassay for their selective toxicity towards Pseudanabaena sp. LW349, a MIB-producing cyanobacterium isolated from a municipal drinking water reservoir.  Anthraquinone-59 was found to be more toxic than SeaKleen towards Pseudanabaena LW349.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov