Fish conservation : a guide to understanding and restoring global aquatic biodiversity and fishery resources / Gene S. Helfman. Helfman, Gene S. Fishes Conservation. Biodiversity conservation. SH327.7 .H46 2007 333.95611 22 HEF Includes bibliographical references (p. 485-563) and indexes. Washington : Island Press, c2007. c2007. 2007 Text xiv, 584 p. : http://www.loc.gov/catdir/toc/ecip079/2007001842.html http://www.loc.gov/catdir/enhancements/fy0732/2007001842-b.html http://www.loc.gov/catdir/enhancements/fy0732/2007001842-d.html eng