| estimating naphthenic acids concentrations in laboratory-exposed fish and in fish from the wild. | naphthenic acids (nas) are the most water-soluble organic components found in the athabasca oil sands in alberta, canada, and these acids are released into aqueous tailing waters as a result of bitumen extraction. although the toxicity of nas to fish is well known, there has been no method available to estimate nas concentrations in fish. this paper describes a newly developed analytical method using single ion monitoring gas chromatography-mass spectrometry (gc-ms) to measure nas in fish, down ... | 2008 | 18667226 |
| potential health risks posed by polycyclic aromatic hydrocarbons in muscle tissues of fishes from the athabasca and slave rivers, canada. | polycyclic aromatic hydrocarbons (pahs) are released to the environment from oil sands operations and from natural sources in alberta, canada. concentrations of 16 usepa priority pahs were measured in tissues of fishes collected from three locations on the athabasca river in alberta and two downstream locations on the slave river in the northwest territories, canada. a total of 425 individual fish were collected including 89 goldeye (hiodon alosoides), 93 whitefish (coregonus clupeaformis), 104 ... | 2017 | 26972698 |
| investigations of mercury concentrations in walleye and other fish in the athabasca river ecosystem with increasing oil sands developments. | recent studies have reported an increasing trend of mercury concentrations in walleye (sander vitreus) from the athabasca river, north eastern alberta (canada); these studies were based on three years of comparison and attributed the mercury increase to expanding oil sands developments in the region. in order to conduct a more comprehensive analysis of mercury trends in fish, we compiled an extensive database for walleye, lake whitefish (coregonus clupeaformis), northern pike (esox lucius) and l ... | 2012 | 22652822 |
| blinded taste panel evaluations to determine if fish from near the oil sands are preferred less than fish from other locations in alberta, canada. | the oil sands industry is rapidly expanding surface mining and bitumen extraction operations near the athabasca river in northeastern alberta, canada. there are anecdotal comments that the fish from the athabasca river have an off-taste, implying that the oil sands operations are the cause. this study was done to determine if the taste of wild fishes caught near the athabasca oil sands was less preferred than the taste of fishes collected from two other river basins in alberta. in blinded experi ... | 2011 | 21247102 |
| elevated mercury concentrations in fish in lakes in the mackenzie river basin: the role of physical, chemical, and biological factors. | during the mid-1990s and through the early 2000s, researchers determined that elevated mercury concentrations were a common occurrence in predatory fish in many lakes in the mackenzie river basin (mrb), located in northern canada. here we present the results of studies investigating factors contributing to higher mercury concentrations in fish in many of these lakes. twenty-two percent of lake trout, 33% of northern pike, and 50% of walleye populations had mean mercury concentrations >0.5 microg ... | 2005 | 16183101 |