Dr Ciarán Byrne, chief executive of Inland Fisheries Ireland  with Dr Cathal Gallagher, head of research and development, at the Inland Fisheries Ireland at the launch of a report on pike. Photograph: Dara Mac Dónaill

A study of the fearsome, predatory pike – cherished by coarse fisherman; dreaded by brown trout anglers – has revealed a dramatic change in the balanc(...)