Great Bustard Memorandum of Understanding Herzegovina, Bulgaria, Croatia, Czech Republic, European Union, Germany, Greece, Hungary, Moldova, Poland, Romania, Slovakia, Slovenia, The Republic of Macedonia and Ukraine). As of August 2012, 13 range states have signed the MoU as well as a number of cooperating organizations. To implement the decision of the Fourth Conference of the Parties of CMS to list the great bustard ("Otis tarda") on Appendix II of the Convention as a consequence of its unfavourable conservation status and the conviction that the species could benefit from an international agreement for its conservation and management and the middle-European population on Appendix I of the
Edwardsiella tarda along with maintaining suitable sanitation of water. Other stress factors include drastic changes in temperature, pH, and dissolved oxygen levels in the water. In order to manage properly for edwardsiellosis water must be checked constantly in order to keep fish stocks completely free of pathogens. Some of the most recent research done on "Edwardsiella tarda" was performed by Griffin et al. (2013) to assess what the literature refers to as "the intra-specific variability of "E. tarda" isolates from 4 different fish species in the eastern United States." These intra-specific variations that they were looking for occur in other parts of