Effects of polychlorinated biphenyls (PCBs) on the respiration of the speckled sanddab (Citharichthys stigmaeus) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/vx021j438

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  • Specimens of Citharichthys stigmaeus, the speckled sanddab, were taken from Yaquina Bay, Newport, Oregon and exposed for eight days to dissolved measured concentrations ranging from 2.9 μg/l to 190 μg/1 of the polychlorinated biphenyl, Aroclor® 1260. Oxygen consumption was measured to determine any change from routine levels of respiration. This research produced the following conclusions: 1) a relationship exists between oxygen consumption and measured concentrations of Aroclor® 1260 in the water as demonstrated by high negative partial correlations and subsequent significant water concentration terms in the regression equations for two of the four experiments: also, a relationship exists between oxygen consumption and tissue concentration of Aroclor® 1260 as demonstrated by high negative partial correlations and subsequent significant tissue concentration terms in the regression equations for three out of four experiments, (because of the inherent variability in oxygen consumption measurements and difficulties of predicting PCB concentrations in both water and tissue, the evidence is difficult to interprete); 2) acetone, used as a solvent for the toxicant, may change oxygen consumption levels and interfere with determining PCB effects; 3) after an eight day dosing period the concentration of Aroclor® 1260 in whole body tissue can be described by the equation: Y = 4.48(1 - e [superscript -.0365x]) where Y is the concentration of Aroclor® 1260 in the tissue and x is the measured Aroclor® concentration in the water; 4) after eight days a constant level of Aroclor® 1260 is present in the tissue if the animal is exposed to water levels of Aroclor® 1260 above approximately 25 μg/1.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-04-02T15:51:27Z (GMT) No. of bitstreams: 1 HainesVirginiaEwald1976.pdf: 562692 bytes, checksum: e4937483de8b3f634646cd9236b7c40b (MD5)
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