TABLE 1.
Prevalence of domoic acid (DA) and saxitoxin (STX) in gastrointestinal samples by species. Maximum concentrations did not reach regulatory limits for either DA (regulatory limit = 20,000 ng DA/g shellfish a ) or STX (regulatory limit = 800 ng STX equivalents/g shellfish a ).
| Species | Collection years | n DA positive/n DA tested (%DA positive) | n STX positive/n STX tested (%STX positive) | n DA and STX positive (%co‐occurrence) | Maximum DA concentration (ng/g) | Maximum STX concentration (ng/g) |
|---|---|---|---|---|---|---|
| Bearded seal, Erignathus barbatus | 2005–2019 |
157/344 (46%) |
96/404 (24%) |
69 (17%) |
1,353 | 464 |
| Ringed seal, Pusa hispida | 2005–2019 |
61/289 (21%) |
47/263 (18%) |
31 (12%) |
1,740 | 180 |
| Spotted seal, Phoca largha | 2005–2016 |
14/268 (5%) |
9/257 (4%) |
1 (0%) |
90 | 66 |
| Ribbon seal, Histriophoca fasciata | 2008–2016 |
1/28 (4%) |
0/28 (0%) |
0 (0%) |
33 | 0 |
Note: n = number of animals.
a
Regulatory limit units have been converted to match those reported in the table above.