This e-mail is not exlusively about marine mammals but many researchers in this field have conducted or are interested on stable isotope analyses. This is an invitation to subscribe to the new electronic list ISESECOL-AR (isotopes estables en ecologia Argentina – stable isotope ecology in Argentina), a discussion about the use of stable isotopes in ecological studies in Argentina. This list was created with one general objective, to enhance communication among researchers interested in the use of stable isotopes in ecology in Argentina and further develop this field both in Argentina and South America in general. Although the list was initiated by ecologists, we hope that researchers from other fields such as anthropology, archaeology, physiology and forensics will subscribe and find it useful as well. We hope that ISESECOL-AR will be a great place for the exchange of ideas and information such as courses, meetings, funding sources, collaboration in research projects and access to specialized literature and laboratories conducting stable isotope analyses. To subscribe send an e-mail to: isesecol-ar-subscribe@googlegroups.com For more information about the list or about us, you can send and e-mail to: isesecol@gmail.com or contact us directly using our contact info below. Sincerely, Luciana Riccialdelli and Luciano O. Valenzuela Luciana Riccialdelli Licenciada en Biología CADIC-CONICET Bernardo Houssay 200. CPV9410CAB Ushuaia, Tierra del Fuego, Argentina Tel: (54) (2901) 422310 int. 149 lriccialdelli@gmail.com Luciano O. Valenzuela Postdoctoral Researcher Department of Biology University of Utah 257 South 1400 East Salt Lake City, UT, 84112, USA Phone: 1-801-587-3405 valenzuela@biology.utah.edu