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Research article - Peer-reviewed, 1998

Sublethal Effects in Caged Rainbow Trout during Remedial Activities in Lake Järnsjön

Blom, Sonja; Norrgren, Leif; Förlin, Lars


Caging juvenile rainbow trout in the PCB-polluted Lake Jarnsjon in 1991 prior to remediation resulted in induction of liver ethoxyresorufin-O-deethylase (EROD) activity, liver lesions, skin lesions and fin erosions, all of which can be caused by subchronic exposure to PCB. During the remediation in 1993 and 1994, pronounced induction of the liver EROD, bile-duct proliferation and a relatively high incidence of necrotic hepatocytes were seen in the rainbow trout caged in Lake Jarnsjon. The histopathological damage noted in the liver was reflected in changes in plasma ASAT activities. In 1998, two years after the remedial activities, the EROD activity was still slightly induced in caged rainbow trout in Jarnsjon, but the fish showed no sign of histopathological changes. In addition, the liver EROD activity was induced in some sites downstream of Jarnsjon. These results indicate a downstream transport of contaminants following the remedial action.

Published in

AMBIO: A Journal of the Human Environment
1998, volume: 27, number: 5, pages: 411-418

Authors' information

Blom, Sonja
University of Gothenburg
Swedish University of Agricultural Sciences, Department of Pathology
Förlin, Lars
University of Gothenburg

UKÄ Subject classification

Environmental Sciences

URI (permanent link to this page)