Relationships Between Chlorinated Hydrocarbon Concentrations and Rearing Mortality of
By John P. Giesy, John Newsted, Donald L. Garling
Journal of Great Lakes Research, Volume 12, Issue 1, 1986, Pages 82-98, ISSN 0380-1330, DOI: 10.1016/S0380-1330(86)71702-4.
A study was conducted to investigate a possible correlation between chlorinated hydrocarbon concentrations and rearing mortality of chinook salmon. Eggs, collected from adult Lake Michigan chinook salmon in October, 1982, were analyzed for chlorinated hydrocarbon concentrations and rearing mortality. Polychlorinated biphenyls, toxaphene, and fifteen other chlorinated hydrocarbons were quantified. Also, concentrations of individual PCB congeners were quantified. We found 78 quantifiable PCB congeners, only three of which were non-ortho substituted. Mean concentrations of Arocloi(R) 1242, 1254 and 1260 were 1.7, 5.4, and 1.1 [mu]g/g, respectively. The concentration of toxaphene-like material was 3.3 [mu]g/g, and the mean concentration of the total DDT complex was 1.0 [mu]g/g. Concentrations of chlorinated hydrocarbons ranged approximately 10-fold among individual fish. An analysis of variance components demonstrated that this variability represented among-fish variation and was not due to errors in sampling or quantification. Duplicate studies of egg viability and fry mortality, conducted at 10, 11, and 15[degree sign]C, correlated with residue concentrations. While some residue concentrations were significantly negatively correlated with egg viability and survival of fry, others were positively correlated. Thus, we observed no consistent trends in Pearson, pairwise-correlations between either egg viability or survival of fry to swim-up stage and individual residue concentrations. When the residues were classified into four principal components, two of the principal components which contained primarily the toxaphene and PCB concentrations were negatively correlated with survival of fry to the swim-up stage.
Keywords: Toxic substances; fish eggs; polychlorinated biphenyls; toxaphene