The effects of salinity on naphthenic acid toxicity to yellow perch: Gill and liver histopathology

Nero, Vincent P.; Farwell, Andrea J.; Lee, Lucy E. J.; Meer, T. Van; MacKinnon, Michael D.; Dixon, D. George

doi:10.1016/j.ecoenv.2005.07.009

Cited by 126 publications

(75 citation statements)

References 24 publications

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“…Alternatively, the progressive changes, including mucous cell and epithelial hyperplasia, could be considered as toxicopathic lesions following chronic exposure to a causative agent (Nero et al 2005; Lease et al 2003;Benli et al 2008;Miron et al 2008;Spencer et al 2008). The same type of gill degenerative changes identified in the current study was described by Gupta and Guha (2006) in Bloch Heteropneustes fossilis exposed to microcystin through intraperitoneal injection.…”

Section: Discussionmentioning

confidence: 51%

Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

Marchand

Dyk

Barnhoorn

et al. 2012

African Journal of Aquatic Science

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SummaryHistopathological changes were identified in selected target organs from two freshwater fish species, Clarias gariepinus and Oreochromis mossambicus, inhabiting a hyper-eutrophic freshwater aquatic system. The approach was to use a histology-based fish health assessment protocol which included a semi-quantitative histopathological assessment of six target organs (gills, liver, ovaries, testes, kidney, and heart). Results of water quality analysis showed selected variables to be above the recommended levels including pH, ammonia, nitrogen, chloride, and phosphorus. A number of histopathological alterations were identified in the target organs of both species, with the highest number observed in the liver. Species differences were identified in terms of the severity of the alterations within all the organs, with most alterations being regressive in nature. The results of this study provide valuable baseline data for two indicator species inhabiting a hyper-eutrophic system that could be useful for future bio-monitoring studies.2

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Section: Discussionmentioning

confidence: 51%

Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

Marchand

Dyk

Barnhoorn

et al. 2012

African Journal of Aquatic Science

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“…The disease impacts were also associated with gill lesions, particularly aneurysms of the secondary lamellae [18]. Follow-up laboratory studies with yellow perch using artificial salt mixtures and naphthenic acids extracted from oil sands material were conducted to attempt to determine causative agents [19,20]. The extracted naphthenic acids caused gill lesions at concentrations as low as 1.7 mg/L.…”

Section: Discussionmentioning

confidence: 99%

Reproductive development of yellow perch (Perca flavescens) exposed to oil sands–affected waters

Heuvel

Hogan

Roloson

et al. 2012

Enviro Toxic and Chemistry

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In similar experiments conducted in 1996 and 2009, yellow perch (Perca flavescens) were stocked into two experimental systems: a demonstration lake where oil sands fine tailings were capped with natural water and a lake in a watershed containing bitumen-bearing sodic clays. In both experiments, yellow perch were captured in May from a nearby reservoir and released into the experimental ponds. Perch were recaptured in the experimental systems, the source lake, and two reference lakes in late September and lethally sampled to examine reproductive parameters. In the 1996 experiment, gonad size and steroid hormones were not affected in either pond environment. In the 2009 experiment, male perch in the water-capped tailings pond showed a significant reduction in the testicular development and reductions in circulating testosterone and 11-ketotestosterone, while no reductions were seen in the second experimental pond. No changes were observed in ovarian size or circulating steroid levels in female perch. In the pond containing tailings, the release of water from underlying tailings caused approximately a twofold increase in salinity, alkalinity, and naphthenic acids, and a pH increase from 8.4 to 9.4 over the 13-year period of the study. In the pond influenced by unextracted oil sands materials, total dissolved solids, major ions, and pH did not change substantially. However, naphthenic acids in this system dropped more than twofold post-watershed reclamation. Because the selective reproductive effect observed in male perch in the experimental end-pit lake were accompanied by increases in naphthenic acids, alkalinity, and pH, a specific cause cannot be determined. The present study adds to the evidence, suggesting the presence of endocrine-disrupting substances in oil sands.

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“…The Merichem NAs mixture was diluted for use in degradation tests in 0.1 N NaOH (EMD Chemicals, Gibbstown, NJ, USA). The oil sands process-derived NA mixture was extracted from processed water collected from Mildred Lake Settling Basin (MLSB) located on the Syncrude Canada Ltd. lease (Alberta, Canada) following the method of Nero et al (2006). Briefly, MLSB water was acidified to pH 2 and centrifuged to collect the precipitate containing NAs and suspended solids.…”

Section: Naphthenic Acidsmentioning

confidence: 99%

“…Their prevalence, and findings of acute toxicity in oil sands tailings (MacKinnon and Boerger 1986) has led to investigations of the toxicity of oil sands process-derived NAs to fish (Nero et al 2006) and phytoplankton (Leung et al 2001;Hayes 2005). Although reviews by Headley and McMartin (2004), Quagraine et al (2005) and Clemente and Fedorak (2005) have highlighted the recent advances in the qualitative and quantitative analyses of NAs, such analyses continue to be a real challenge in studies initiated to assess the environmental risk and/or the biodegradation of NAs.…”

Section: Introductionmentioning

confidence: 99%

Examining the Microbial Degradation of Naphthenic Acids Using Stable Isotope Analysis of Carbon and Nitrogen

Videla

Farwell

Butler

et al. 2008

Water Air Soil Pollut

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The effects of salinity on naphthenic acid toxicity to yellow perch: Gill and liver histopathology

Cited by 126 publications

References 24 publications

Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

Reproductive development of yellow perch (Perca flavescens) exposed to oil sands–affected waters

Examining the Microbial Degradation of Naphthenic Acids Using Stable Isotope Analysis of Carbon and Nitrogen

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