Figure 4

Validation of the method. (A) The density distribution of the calculated bias between the daily averaged drift rate from summarized data (SDDR) and the observed daily averaged drift rate (ODDR) for the three seals. Grey shadowed area covers the 95% confidence interval, and vertical red line is drawn at the median. (B) The calculated bias versus the ODDR, evidencing a lack of any trend (horizontal red line set at Y = 0). (C) The positive linear relationship between the ODDR and the SDDR and the 95% confidence interval (SDDR = −0.001 + 0.986ODDR, r2 = 0.984).