Fisheries management issues are no longer exclusively limited to fishe
ries sustainability. General environmental concerns have become criter
ia in assessing the success of fisheries management and have opened up
possibilities for new kinds of conflict between interest groups. As a
n example the disagreement between bird conservation and fisheries at
the Shetland Islands shows how the introduction of new world views mak
e management more complex. Quantitative tools of fisheries assessment
can be used to identify scientific uncertainties but the resolution of
conflicts demands new approaches to the whole management structure, w
hich must facilitate a systematic treatment of different values and th
e trade-offs these imply. This paper discusses the application of deci
sion-analytic methods for this purpose. (C) 1997 Elsevier Science Ltd.