02-02-2015, 12:40 PM
Volcanic Source of Mercury?
Yellowfin Tuna -
- "The average life span is 8 years."
- "Yellowfin tuna, Thunnus albacares, travel long distances. Migratory patterns have shown distances traveled from the US Pacific Coast to Japan."
Source - http://marinebio.org/species.asp?id=139
Recent long term eruption of Kilauea begins around January 1983.
Test sample dates from initial article.
-"Drevnick and his colleagues reanalyzed data from three studies that sampled the same yellowfin tuna population near Hawaii in 1971, 1998 and 2008."
-"Drevnick and his colleagues included yellowfins between 48 and 167 pounds and used a computer model that controls for the effect of fish body size. Data from 229 fish were analyzed: 111 from 1971, 104 from 1998 and 14 from 2008."
-"The researchers found that mercury concentrations in the yellowfins did not change between the 1971 and 1998 datasets. However, concentrations were higher in 2008 than in either 1971 or 1998."
1983 to 1998 is 15 years volcanic eruption exposure with no signs of increased mercury in the 1998 samples.
Is it a volcanic source of mercury?
The increased mercury appears in 2008 thus sometime between 1998 and 2008 an increase in mercury is introduced. Source?
Yellowfin Tuna -
- "The average life span is 8 years."
- "Yellowfin tuna, Thunnus albacares, travel long distances. Migratory patterns have shown distances traveled from the US Pacific Coast to Japan."
Source - http://marinebio.org/species.asp?id=139
Recent long term eruption of Kilauea begins around January 1983.
Test sample dates from initial article.
-"Drevnick and his colleagues reanalyzed data from three studies that sampled the same yellowfin tuna population near Hawaii in 1971, 1998 and 2008."
-"Drevnick and his colleagues included yellowfins between 48 and 167 pounds and used a computer model that controls for the effect of fish body size. Data from 229 fish were analyzed: 111 from 1971, 104 from 1998 and 14 from 2008."
-"The researchers found that mercury concentrations in the yellowfins did not change between the 1971 and 1998 datasets. However, concentrations were higher in 2008 than in either 1971 or 1998."
1983 to 1998 is 15 years volcanic eruption exposure with no signs of increased mercury in the 1998 samples.
Is it a volcanic source of mercury?
The increased mercury appears in 2008 thus sometime between 1998 and 2008 an increase in mercury is introduced. Source?