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
 Harry K. Dupree Stuttgart National Aquaculture Research Cntr: Stuttgart, AR
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Stuttgart, Arkansas Harry K. Dupree Stuttgart National Aquaculture Research Cntr 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
- IACUC Summary

Title:   Author  item
                                            ROBINSON, CHRISTOPHER - Florida Atlantic Universityitem
                                            WILLS, PAUL - Florida Atlantic Universityitem
                                            Riche, Martinitem
                                            Straus, David

                                                         - *Dave*
  Submitted to: North American Journal of Aquaculture
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 3/6/2012
                                    Publication  Date: 1/31/2013
                                    Citation: Robinson, C.B., Wills, P.S., Riche, M.A., Straus, D.L. 2013. Tissue-specific copper concentrations in red drum Sciaenops after long-term exposure to sublethal levels of waterborne copper and a 21-day withdrawal. North American Journal of Aquaculture. 75:1-6.Interpretive Summary: Juvenile red drum were exposed to a low dose (0.25-0.35 mg/L) copper treatment in a recirculating aquaculture system for 242 days to control disease organisms.  The treatment was followed by a 21-day purging period.  Skin, muscle, gill, liver and intestinal tissues were sampled for copper concentrations over the 21-day purging period.  The liver and intestine accumulated copper at a rate strongly influenced by the water copper concentration.  Skin, gill, and muscle tissue did not accumulate substantial amounts of copper.  The rank order of copper concentration in each tissue was intestine > liver > gills > skin > muscle.  Red drum cultured in recirculating aquaculture systems had low copper levels in muscle tissue relative to wild caught red drum.  A 21-day purging period following long-term copper treatments < or = 0.35 mg/L appears to be sufficient to meet the safety standards for human consumption.
                                Technical Abstract: Juvenile red drum Sciaenops ocellatus were exposed to sublethal waterborne copper (Cu) concentrations (0.25-0.35 mg/L Cu) using a chelated Cu compound for 242 days as a prophylactic treatment to control ectoparasites followed by a 21-day withdrawal period in two 43 m3 recirculating aquaculture systems.  Skin, muscle, gills, liver and intestinal tissues were collected on days 1, 3, 5, 15, and 21 during the 21-day depuration.  Liver and intestine accumulated Cu at a rate strongly influenced by the environmental Cu load.  Skin, gill, and muscle tissue did not accumulate substantial amounts of Cu despite its presence at therapeutic levels.  The rank order of Cu concentration in each tissue was intestine > liver > gills > skin > muscle.  Predictive equations for tissue Cu concentration in ug/g relative to time of withdrawal (day) and waterborne Cu concentrations (mg/L) were generated using trend analysis.  Red drum cultured in recirculating aquaculture systems had low (26-52 ug/g) detectable Cu concentrations in muscle tissue relative to wild caught red drum (414 ug/g).  A 21-day withdrawal following prophylactic Cu treatments < or = 0.35 mg/L in red drum appears to be sufficient to meet the safety standards for human consumption.


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