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The effect of fish-eating birds on their fish-prey populations has been a matter ofconcern to conservationists, anglers and fishery interests, especially when both bird andfish species have conservation status and are afforded some protection by law.Understanding the predator-prey interactions will assist in managing these potentialconflicts. This situation could arise with the Common Kingfisher (Alcedoatthis), whose range covers many important Atlantic salmon (Salmosalar) rivers. In order to increase our knowledge on predator-prey interactionsbetween these species, we collected data on the diet and feeding rates of a kingfisherpopulation breeding in an Atlantic salmon river in southern England (River Frome). Resultsshowed that, during nestling period, kingfishers provided a mean of 62 fish per day to thenest and that the mean salmon intake was 2.5% of the entire diet, which is equivalent to86 salmon parr consumed by each kingfishers pair for the entire breeding period (assuming2.2 broods/pair/year). The total 0-group salmon population in the River Frome was 63 900.The estimated loss of 0-group salmon parr to the kingfishers over one season was 0.8%,thus supporting the view that the kingfisher has a negligible biological impact over thissalmon population

Impact of Common Kingfisher on a salmon population during the nestling period in southern England