Lake Naivasha is a shallow, freshwater lake in the eastern Rift Valley of Kenya. Its fish community now comprises only introduced species. Oreochromis spirulus niger was stocked in 1925 as a forage fish for the largemouth bass, Micropterus salmoides , introduced in 1929 for sport fishing. Further introductions of tilapiines followed for commercial exploitation. A gillnet fishery opened in 1959, and the annual species catch com...

Inland fisheries in England and Wales have high economic and social values. Managing participation to maximise fishery performance is key to maintaining this status. The capital value of fishing rights for migratory salmonid fisheries is €165 million. Coarse fisheries contribute €1030 million to the economy. The central tenet to increasing participation in recreational salmonid fisheries is that an increase in stock size will...

The increase in popularity of ‘big game’ type angling in the UK has lead to a proliferation of waters stocked with non‐native species. Many introductions have been illegal and the potentially irreversible ecological consequences are yet to be realised. Some case histories are presented and show the potential impacts of these species to involve the effects of predation, competition, disease, hybridisation and habitat degradatio...