Establish deviation ponds in fish farms to reduce predation of fish stock by mammals to reduce human-wildlife conflict
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
Background information and definitions
Some mammals can become significant predators of fish being reared in fish farms. For example, one study found that rainbow trout Onchorhynchus mykiss from a fish farm formed 87% of biomass of prey consumed by otters Lutra lutra in the vicinity (Marques et al. 2007). Deviation ponds are sites where fish are made easily accessible to predators in order to keep them away from other, more valuable, fish kept elsewhere on the site. If effective, this intervention could reduce incentives for carrying out lethal control of mammalian predators of fish.
Marques C., Rosalino LM. & Santos-Reis M. (2007) Otter predation in a trout fish farm of Central-east Portugal: Preference for 'fast-food'? River Research and Applications, 23, 1147–1153.