Figure 4. Comparisons of time-series changes of Japanese jack mackerel eDNA concentrations for (a) nuS and (b) nuL observed in field sampling. Circles and triangles in the plots show the time-series changes of target eDNA concentrations (original concentrations + 0.1 followed by log-transformed) with and without BAC addition, where regression lines are indicated in black and gray lines and the corresponding 95 % CIs are indicated in solid and dotted lines, respectively. In (a), we note that the lower CI of the regression line in the treatment without BAC addition is not visualized.