Objections are also made against finfish farms on the grounds of the alleged effects of escapes from these farms on wild fisheries. Complainants argue, for example, that escaped fish interbreed with wild fish and contaminate the gene pool. There is an onus on fish farmers to take all appropriate measures to avoid escapes from their operations and to have plans in place for dealing with the containment of any escape that may occur. In the event of an escape, the fish farmer must notify the authorities and all possible steps must be taken to capture the escaped fish. The arrangements for preventing escapes, and for dealing with any that may occur, will also be examined in the overall review of enforcement and control arrangements.