Natural factors to consider when using acetylcholinesterase activity as neurotoxicity biomarker in Young-Of-Year striped bass (<Emphasis Type="Italic">Morone saxatilis</Emphasis>) |
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| Authors: | Eric D H Durieux Thomas B Farver Patrick S Fitzgerald Kai J Eder David J Ostrach |
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| Institution: | 1.Pathobiology, Conservation & Population Biology Laboratory, John Muir Institute of the Environment, Center for Watershed Sciences,University of California, Davis,Davis,USA;2.Centre de Recherche Halieutique Méditerranéenne et Tropicale,IFREMER, Laboratoire Ressources Halieutiques,Sète cedex,France;3.Population Health and Reproduction Department, School of Veterinary Medicine,University of California, Davis,Davis,USA |
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| Abstract: | Acetylcholinesterase (AChE) activity is one of the most common biomarkers of neurotoxicity used in aquatic organisms. However,
compared to its extensive use as biomarker, the effects of natural factors on AChE activity remain unclear especially in estuarine
fishes. The aim of this study was to evaluate the effects of natural factors on AChE activity of striped bass (Morone saxatilis) juveniles. Brain AChE activity was measured in YOY (Young-Of-Year) individuals collected monthly from August 2007 to January
2008 at 12 different sites in the San Francisco Estuary system. The spatio-temporal variability of AChE was analyzed relative
to water temperature and salinity as well as fish size. AChE activity was highly positively correlated with water temperature
and to a lesser extent negatively with fish size while no relationship was detected with salinity. Taking into account these
natural factors when using AChE as a biomarker will help to determine and understand the effects of neurotoxic contaminants
on fish in estuarine systems. |
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