Fish farmers in the mid eighties harvest salmon during the early days of the industry, when it was seen as a 'croft' or part-time activity.

Nowadays, fish-farming is big business in the Hebrides.

Multinational companies produce many thousands of tons of salmon per year and control most of the sea and freshwater lochs.

This intensive form of food production brings hundreds of jobs to fragile local communities. But there is increasing concern about a host of environmental issues, such as the effects on wild salmon stocks and the sea bed life.

In the post-BSE public backlash against intensively farmed foods, which has seen sales of organic produce sky-rocket, some are also voicing concerns about the methods used to produce farmed salmon.