Relationships Between Chlorinated Hydrocarbon Concentrations and Rearing Mortality of Chinook Salmon (Oncorhynchus Tshawytscha) Eggs from Lake Michigan

摘要: Abstract 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 salmon in October, 1982, were analyzed for mortality. Polychlorinated biphenyls, toxaphene, fifteen other hydrocarbons quantified. Also, individual PCB congeners We found 78 quantifiable congeners, only three which non-ortho substituted. Mean Arocloi ® 1242, 1254 1260 1.7, 5.4, 1.1 μg/g, respectively. The concentration toxaphene-like material 3.3 μg/g, the mean total DDT complex 1.0 μg/g. Concentrations ranged approximately 10-fold among fish. An analysis variance components demonstrated that this variability represented among-fish variation not due errors sampling or quantification. Duplicate studies egg viability fry mortality, at 10, 11, 15°C, correlated with residue concentrations. While some significantly negatively survival fry, others positively correlated. Thus, we observed no consistent trends Pearson, pairwise-correlations either swim-up stage When residues classified into four principal components, two contained primarily toxaphene stage.