Abstract
Ultrastructural biomarkers in gill, liver, andkidney of brown trout (Salmo truttaf. fario) and stone loach (Barbatulabarbatula) were investigated over afive year period. The cellular damage of theorgans was assessed semi-quantitatively basedon a three-step classification ofultrastructural responses. Data obtained forfish exposed under semi-field conditions in twodifferently polluted test streams and in thelaboratory demonstrated that the ultrastructureof the organs can be correlated with differentpollutant exposure conditions. Cellular damagewas generally more severe in fish exposed to acomplexly polluted stream than in those exposedto a moderately polluted stream or to tap waterin the laboratory. Histopathological effects inliver and gill of trout were more pronounced inferal fish than in transplanted fish, whereasresponses in the kidney in both species, and inliver and gill of loach, were similar forintroduced and feral fish. In a laboratoryexperiment where trout were exposed todifferent mixtures of pollutants includingpesticides, PAH, and ammonia, only theultrastructure of kidney and liver showedsignificant differences between the threeexperimental set-ups. In a recovery experiment,where trout were transferred from thesemi-field condition back to the laboratory,ultrastructural investigations showed adifferential capacity of the respective organsto recover from stress under field conditions.Kidney and liver fully recovered after threemonths under control condition whereas gillsdemonstrated only partial recovery.
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Gernhöfer, M., Pawert, M., Schramm, M. et al. Ultrastructural biomarkers as tools to characterize the health status of fish in contaminated streams. Journal of Aquatic Ecosystem Stress and Recovery 8, 241–260 (2001). https://doi.org/10.1023/A:1012958804442
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DOI: https://doi.org/10.1023/A:1012958804442