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Title: Do fish growth rates correlate with PCB body burdens?

Author: Rypel, Andrew L.; Bayne, David R..;

Date: 2010

Source: Environmental Pollution 158:2533-2536.

Publication Series: Scientific Journal (JRNL)

Description: We evaluated whether growth rates of six fish species correlated with PCB concentrations in a moderately-to-heavily polluted freshwater ecosystem. Using a large dataset (n ΒΌ 984 individuals), and after accounting for growth effects related to fish age, habitat, sex, and lipids, growth correlated significantly, but positively with lipid-corrected PCB concentrations for 4 of 6 species. Remaining species showed no correlations between growth and PCBs. Comparisons with regional, lentic growth averages for four species confirmed growth was on par and in three of four cases higher than regional averages in the PCB-polluted ecosystem. We conclude that for these species, at the range of concentrations examined, these PCBs do not exert negative impacts on growth. Rather, factors often cited as influential to growth were also driving growth trends in this study. Future studies that evaluate whether pollution affects growth must account for major growth drivers prior to attributing growth differentials to pollution alone.

Keywords: Biodilution Contaminant Growth dilution Otolith Production

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Rypel, Andrew L.; Bayne, David R.. 2010. Do fish growth rates correlate with PCB body burdens? Environmental Pollution 158:2533-2536.


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