Abstract
This report considers the potential effects on fishes of the underwater sounds generated by impact pile driving and, where appropriate, other underwater sound sources. Using a comprehensive review of the scientific literature since 2005, the report considers what is now known about underwater sound and the effects of anthropogenic sound on behavior, physiology, and anatomy. The report then evaluates current (2008) guidelines in the light of new data, and proposes the incorporation of newer (2014) guidelines in future regulatory decisions. The report concludes with a discussion of major data gaps that need to be filled to further improve criteria and recommends research programs that will help fill these gaps.