FIGURE 2.

The proportion of bearded seal stomach content samples with detectable concentrations of domoic acid (DA) (a, b) and saxitoxin (STX) (c, d) from May–September in the Bering (a, c) and Chukchi (b, d) Seas by year. Sample size is listed to the right of each corresponding data point. Lines represent logistic regressions comparing presence/absence of toxin over the years, and shaded areas represent associated 95% confidence intervals. The only significant trend (p = .004) was in the Bering Sea (a).