Figure 2
From: Spatio-temporal optimization of sampling for bluetongue vectors (Culicoides) near grazing livestock
From the field data: The probability of falsely detecting absence on the field as a function of the number of traps used for sampling. Left: Five catch nights with more than 90% zero-catches. Right: 11 catch nights with less than 90% zero-catches. On five catch nights there was no probability of falsely detecting absence. Dotted lines show the 5% and 10% probability of falsely detecting absence of vectors.