Ecological changes as a plausible explanation for differences in uptake of contaminants between European perch and eelpout in a coastal area of the Baltic Sea.
Unexpected increasing trends in the concentration of contaminants in European perch (Perca fluviatilis) and in activity of ethoxyresorufin-O-deethylase (EROD) in European perch and eelpout (Zoarces viviparus) have been observed at a Swedish coastal reference site. This study uses data from different sources to investigate plausible explanations. The results showed that a change in diet and an improved overall condition coincide with an increase in mercury in European perch. Furthermore, an increase in several organic contaminants in European perch coincided with the introduction of an invasive deep-burrowing polychaete, which likely contributed to the release of contaminants through bioturbation. The increase in EROD-activity in both species seems to be related to contaminants that reach the fish through the water rather than the diet. The results show that for contaminants that are taken up via the diet, trends in contamination can be opposite for different species of fish in the same area.
['Hanson|Niklas|N|', 'Larsson|Åke|Å|', 'Parkkonen|Jari|J|', 'Faxneld|Suzanne|S|', 'Nyberg|Elisabeth|E|', 'Bignert|Anders|A|', 'Henning|Helene Ek|HE|', 'Bryhn|Andreas|A|', 'Olsson|Jens|J|', 'Karlson|Agnes M L|AML|', 'Förlin|Lars|L|']
D000818:Animals D059001:Aquatic Organisms D000079687:Biological Monitoring D015415:Biomarkers D017753:Ecosystem D008628:Mercury D009792:Oceans and Seas D010471:Perches D011077:Polychaeta D012623:Seawater D013548:Sweden D014874:Water Pollutants, Chemical
Mercury EROD-activity Fish Biomarkers Biomonitoring PCB