NMFS issues this temporary rule pursuant to its authority to issue emergency measures under the Magnuson-Stevens Fishery Conservation and Management Act (Magnuson-Stevens Act). This emergency action increases the butterfish allowable biological catch (ABC) for the 2011 fishing year from 1,500 mt to 1,811 mt, and applies the increase to the butterfish mortality cap in the Loligo squid fishery, based on the most recent and best available scientific information.