Document Type

Article

Publication Date

7-2017

Publication Title

Bulletin of Environmental Contamination and Toxicology

Keywords

Kingston Harbour, stable isotopes, biomagnificaiton, toxicokinetics, POPs

Abstract

Multiple sizes of Sea bream were collected from Kingston Harbour, Jamaica, to assess steady state bioaccumulation of polychlorinated biphenyls (PCBs) in a tropical fish. Sea beam fork lengths ranged from 7.3-21.5 cm (n=36 fish) and tissue lipids decreased with body length. Larger fish had lower δ13C isotopes compared to smaller fish, suggesting a change in diet. Linear regressions showed no differences in lipid equivalent sum PCB concentrations with size. However, differences in individual congener bioaccumulation trajectories occurred. Less hydrophobic PCBs decreased with increasing body length, intermediate PCBs showed no trend, whereas highly hydrophobic (above log KOW of 6.5) PCBs increased. The different congener patterns were interpreted to be a result of decreases in overall diet PCB concentrations with increased fish length coupled with differences in PCB toxicokinetics as a function of hydrophobicity yielding dilution, pseudo-steady state and non-steady state bioaccumulation patterns.

DOI

10.1007/s00128-017-2132-4

Comments

Article Accepted for Publication Jun, 2017

The final publication is available at Springer: https://doi.org/10.1007/s00128-017-2132-4

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