Abstract
Summary Objective To investigate and quantify the extent of predation by specific pisciverous fish and non-native crustacean species on diadromous fish within the freshwater and estuarine environments. Specifically, to determine the potential predation impact of signal crayfish on the eggs and larval stages of Atlantic salmon, determine the habitat use and territory size of wild Atlantic salmon parr in the presence and absence of signal crayfish, determine the potential predation impact by stocked and escapee trout on emigrating salmon smolts, and determine the potential predation impact of sea bass on emigrating salmon smolts. Key Customer Purpose Advise Defra, other management authorities and stakeholders in England and Wales on the management of migratory salmonid stocks and the species that prey on them. Results will be used to inform the resolution of potential conflicts between the management plans for different fish species and to advise on the control or eradication programmes for non-native species such as signal crayfish.
United Kingdom