Report of the Study Group on Toxicological Mechanisms Involved in the Impact of Acid Rain and its Effects on Salmon

The study Group met at lCES Headquarters from 11-15 March 1989 to consider the questions asked in C.Res.1988/3:2:

"A Study Group on Toxicological Mechanisms Involved in the Impact of Acid Rain and its Effects on Salmon will be established under the chairmanship of Pr H. Leivestad (Norway) and will meet at lCES Headquarters from 11-15 March 1989 at national expense to:

a) examine the basis of the toxicological impact of acid rain on water quality of the habitat of salmonid species, particularly the factors that interact to ameliorate or worsen the effects of low pH,

b) resolve the question of the apparent differences in either water chemistry or stock sensitivity in rivers in northeastern North America relative to rivers in other regions of interest to lCES, e.g., Scandinavia and the UK,

c) provide estimates of acidification in the NASCO, the number of salmon lost due to North-East Atlantic Commission Area of

d) describe the effectiveness of mitigation measures and the extent to which the measures are in current use.