Management of invasive freshwater fish: striking the right balance!

摘要: Management of invasive species is integral to the maintenance freshwater environments. Habitat protection alone will not protect full range indigenous communities or ecosystem services. It also contentious as it may involve removal valued introduced sport fishes. An fish can be defined any that significantly adversely affects long-term survival genetic variation native species, integrity sustainability natural communities. Implications for fish, particularly trout, must considered within context they are by public, have statutory protection, and their presence contributes conservation New Zealand’s fresh waters. Standard pest management criteria demonstrates widespread some likely neither socially acceptable, nor technically fiscally feasible. Nevertheless there circumstances under which required. Invasive include exotic threaten impact upon waterway condition The continued spread indicates requires urgent attention a coordinated multi-agency approach. Any response should draw established terrestrial frameworks, experience operations (national international), island eradications international fishery restoration programmes. 1 . I N T R O D U C In developing workshop on was aware were number people who questioned need fish. Landuse impacts streams loss habitat seen many much higher priority. Equally, concerns raised about implications considering highly salmonid ‘pest’ strong public sector interest in maintaining these fisheries even though based species. debate highlighted during consultation phase Zealand Biodiversity Strategy. Sport advocates voiced sports just ‘thin edge wedge’of process aimed