Publication Abstract

Regression models for assessing trends in cadmium and PCBs in cod livers from Oslo Fjord

M.D. Nicholson, N.W. Green and S.J. Wilson

Trend studies of contaminants measured in fish liver have expressed concentrations on different bases (e.g. liver-weights, dry-weights or fat-weights) and regressed them against different variables. This makes the results of studies difficult to compare. A simple model is presented which shows that various combinations of bases and variables are equivalent. The model is used to assess trends in cadmium and PCBs in cod (Gadus) livers from the Oslofjord for 1981-86. Implications of the fitted equations for future data collection are considered.

Reference:

M.D. Nicholson, N.W. Green and S.J. Wilson, 1991. Regression models for assessing trends in cadmium and PCBs in cod livers from Oslo Fjord. Marine Pollution Bulletin, 22: 77-81.