A new Irish study has revealed levels of genetic diversity in Irish populations that are greater than genetic diversity between the entire human race. 13 different varieties of brown trout in Lough Corrib had already been identified by Inland Fisheries Ireland.
‘’Thin and streamlined like a herring, croneen trout are a pelagic fish, designed to swim long distances to spawn. The croneen population in the Lough Derg catchment of the Shannon’s main stem retreat to the small Camcor river in Co Offaly, 50 kilometres away, to spawn.
Another trout variety in the river Suir, which hasn’t yet been named, was found to travel 78km from the river Nier in Co Waterford, where it is born, down to the main stem of the Suir’’.