| 国家 | 地点 | 描述 | 年代 | Qualitative Value | 参考文献 |
|---|---|---|---|---|---|
| Alaska | Beaufort Sea | 2012 - 2014 | extremely abundant | 118138 | |
| Alaska | Chukchi Sea | 2004 - 2004 | common | 118514 | |
| Alaska | Chukchi Sea | 2009 - 2009 | rare | 118514 | |
| Alaska | Chukchi Sea | 2010 - 2010 | extremely abundant | 118514 | |
| Alaska | Chukchi Sea | 2012 - 2012 | rare | 118514 |