Echo-sounding can discriminate between fish and macroinvertebrates in fresh water (pages 912–923)JUHA JURVELIUS, FRANK REIER KNUDSEN, HELGE BALK, TIMO J. MARJOMÄKI, HEIKKI PELTONEN, JOUNI TASKINEN, ANTTI TUOMAALA and MARKKU VILJANEN
Article first published online: 2 JAN 2008 | DOI: 10.1111/j.1365-2427.2007.01944.x