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- W2019908215 abstract "Juvenile Pacific herring, Clupea pallasi, were exposed both acutely (96 h) and chronically (9 weeks) to three concentrations of the water-soluble fraction (WSF) of North Slope crude oil. Mean (± S.E.) total PAH (TPAH) concentrations at the beginning of the acute exposure experiment were: 9.7 ± 6.5, 37.9 ± 8.6 and 99.3 ± 5.6 μg/L. TPAH concentrations declined with time and the composition of the WSF shifted toward larger and more substituted PAHs. Significant induction of hepatic cytochrome P450 content, ethoxyresorufin O-deethylase and glutathione-S-transferase activities in WSF-exposed fish indicated that hydrocarbons were biologically available to herring. Significant but temporary, elevations in plasma cortisol (4.9-fold and 8.5-fold increase over controls in the 40 and 100 μg/L groups, respectively), lactate (2.2-fold and 3.1-fold over controls in the 40 and 100 μg/L groups) and glucose (1.3-fold, 1.4-fold and 1.6-fold over controls in the 10, 40 and 100 μg/L groups) occurred in fish exposed acutely to WSF. All values returned to baseline levels by 96 h. Similar responses were seen with the first of several sequential WSF pulses in the chronic exposure study. Subsequent WSF pulses resulted in muted cortisol responses and fewer significant elevations in both plasma lactate and glucose concentrations. Hematocrit, leucocrit, hemoglobin concentration and liver glycogen content were not affected by acute or chronic WSF exposure. Plasma [Cl−], [Na+] and [K+] were significantly higher in the 100 μg/L WSF-exposed group by 96 h compared to control fish, and continued to be elevated through the entire chronic exposure period. Unlike the measured stress parameters, ionoregulatory dysfunction was not modulated by WSF pulses. The results of this study suggest that chronic exposure to WSF affects at least two important physiological systems in herring: the ability of fish to maintain ion homeostasis and the interrenally-mediated organismal stress response." @default.
- W2019908215 created "2016-06-24" @default.
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- W2019908215 date "2005-09-01" @default.
- W2019908215 modified "2023-09-25" @default.
- W2019908215 title "Ion homeostasis and interrenal stress responses in juvenile Pacific herring, Clupea pallasi, exposed to the water-soluble fraction of crude oil" @default.
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- W2019908215 doi "https://doi.org/10.1016/j.jembe.2005.02.021" @default.
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