Lek mating females away from the hotshot. A manipulative experiment using the little bustard, "Tetrax tetrax", was done to test the various lek evolution models. The experiment involved varying the size and sex ratio of leks using decoys. To test whether or not the presence of a hotshot determined lek formation, a hotshot little bustard decoy was placed within a lek. After the fake hotshot was added to the lek, both male and female visitation to the lek increased. The hotspot model considers the female density to be the catalyst for the clustering of males. This model predicts that leks will form
Edwardsiella tarda in routine tests. This led to the description of two novel species from fish viz "Edwardsiella piscicida" (Abayneh et al., 2013) and "Edwardsiella anguillarum" (Shao et al. 2015) that were previously mis-classified as E. tarda. This might have addressed the arguments between the Japanese and American investigators with regard to the difficulty of differentiating isolates from fish and humans by the time and ended up classifying all into same species i.e. "Edwardsiella tarda". "Edwardsiella tarda" is widely distributed throughout the world. It has been found from the water in Japan all the way to the United States. In Japan it