Dr. Cathal Gallagher:

The proportion of that has not been determined. Whether the Cathaoirleach is talking about high seas fisheries or fisheries by-catch, there is no exact figure. It has been investigated a number of times but it is very difficult in light of the size of the ocean. When you consider all the populations of fish in the ocean, the salmon population is small when you go out in that big ocean even though it is big in our rivers. It is therefore very hard to define how much of an impact that might be having. It potentially has an impact.