Surveying and monitoring distribution and population trends of the Eurasian otter (Lutra lutra) : guidelines and evaluation of the standard method for surveys as recommended by the European section of the IUCN/SSC Otter Specialist Group Author(s) Reuther, Claus Dolch, Dietrich Green, Rosmary Jahrl, Jutta Jefferies, Don Krekemeyer, Anna Kucerova, Marcela Madsen, Aksel Bo Romanowski, Jerzy Roche, Kevin Ruiz-Olmo, Jordi Teubner, Jens Trindade, Anabela
