Copper, zinc and cadmium in marine cage fish farm sediments: an extensive survey.
The diet of cage-farmed Atlantic salmon contains a range of trace metals, some of which have toxic properties, e.g. zinc, copper and cadmium. A survey of metal concentrations (ICP-MS analysis) in surface sediments of ca. 70 stations was carried out in both May and December 2000 around a Scottish fish farm. Additionally, at 13 stations on 2 orthogonal transects centered on the farm, sediments were analysed at 1cm intervals to 8 cm depth. Maximum concentrations in surface sediments were 921, 805 and 3.5 microg g(-1) for Zn, Cu and Cd, respectively, and were found at stations near the fish farm. The calculated losses from the farm (feed input minus fish output) were 87.0%, 4.3% and 14.0% of the background-corrected inventories for Zn, Cu and Cd, respectively, indicating that for Cu and Cd at least, the feed is not the only source.
Dean
Rebecca J
RJ
Scottish Association for Marine Science, Ecology Department, Dunstaffnage Marine Laboratory, Oban, Argyll PA37 1QA, Scotland, UK.
Shimmield
Tracy M
TM
Black
Kenneth D
KD
D000818:Animals; D017756:Aquaculture / Q000379:methods*; D002104:Cadmium / Q000032:analysis*; D003300:Copper / Q000032:analysis*; D004032:Diet / Q000009:adverse effects; D017753:Ecosystem; D004781:Environmental Exposure / Q000009:adverse effects; D004785:Environmental Pollutants / Q000032:analysis*; D019015:Geologic Sediments / Q000737:chemistry*; D012474:Salmon; D012606:Scotland; D012621:Seasons; D014867:Water / Q000737:chemistry; D015032:Zinc / Q000032:analysis*
D004785:Environmental Pollutants; D002104:Cadmium; D014867:Water; D003300:Copper; D015032:Zinc