More broadly, selecting the appropriate instrument mix will require taking into account local and regional priorities, as well as international commitments under the CBD and other agreements. Biodiversity policy may affect broader national priorities, such as poverty alleviation, sustainable development and economic growth, and these need to be considered in a coherent way so as to maximise synergies and address any trade-offs (OECD, 2012). For example, if an over-exploited fish stock is on the verge of collapse, a (temporary) ban on fishing may be most effective, so as to allow the stock to recover.