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+--- Thread: Mercury concentrations in Hawaiian yellowfin tuna (/showthread.php?tid=15503)
Mercury concentrations in Hawaiian yellowfin tuna - Wao nahele kane - 02-02-2015
Mercury concentrations in Hawaiian yellowfin tuna are increasing at a rate of 3.8 percent or more per year, according to a new University of Michigan-led study that suggests rising atmospheric levels of the toxin are to blame.
Read more at: http://phys.org/news/2015-02-mercury-hawaiian-yellowfin-tuna.html#jCp
http://phys.org/news/2015-02-mercury-hawaiian-yellowfin-tuna.html
RE: Mercury concentrations in Hawaiian yellowfin tuna - pahoated - 02-02-2015
"The heavy metal accumulates in tuna and other fish in an especially toxic form, methylmercury, which comes from mercury released by coal-fired power plants and other industrial or natural sources, such as volcanoes."
Very dirty oil fired electric plants and very active volcanoes about sums it up for the increase around Hawaii. Phasing out oil fired electric plants is something that could be done to reduce levels.
"Mahalo nui Pele, 'ae noho ia moku 'aina" - kakahiaka oli
RE: Mercury concentrations in Hawaiian yellowfin tuna - kalakoa - 02-02-2015
Phasing out oil fired electric plants
Replacing them with geothermal, perhaps?
RE: Mercury concentrations in Hawaiian yellowfin tuna - Guest - 02-02-2015
Mercury is found in active volcano gasses here in Hawaii, true or false?
The wells drilled by geothermal into the heart of this active volcano exposes our community to more of this possible mercury from this volcano, true or false.
How are these ahi tuna being tested so often to come up with such data or facts, could our communities people or catchments be worth such a study?. We swim these waters too.
Could higher doses of mercury in our Hawaiian atmosphere have any effect on our Ohia?
How dangerous is mercury for our areas keiki if they are eating this fish or subjected to the same conditions or atmosphere? Thanks.
RE: Mercury concentrations in Hawaiian yellowfin tuna - Obie - 02-02-2015
"Mercury is found in active volcano gasses here in Hawaii, true or false?"
TRUE
"The wells drilled by geothermal into the heart of this active volcano exposes our community to more of this possible mercury from this volcano, true or false."
FALSE
RE: Mercury concentrations in Hawaiian yellowfin tuna - opihikao - 02-02-2015
quote:Gypsy69, here's a good read to start:
Originally posted by gypsy69
Mercury is found in active volcano gasses here in Hawaii, true or false?
The wells drilled by geothermal into the heart of this active volcano exposes our community to more of this possible mercury from this volcano, true or false.
How are these ahi tuna being tested so often to come up with such data or facts, could our communities people or catchments be worth such a study?. We swim these waters too.
Could higher doses of mercury in our Hawaiian atmosphere have any effect on our Ohia?
How dangerous is mercury for our areas keiki if they are eating this fish or subjected to the same conditions or atmosphere? Thanks.
A Local Guide to Eating Fish Safely
health.hawaii.gov/wic/files/2013/05/mercury.pdf
JMO.
RE: Mercury concentrations in Hawaiian yellowfin tuna - Wao nahele kane - 02-02-2015
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?
RE: Mercury concentrations in Hawaiian yellowfin tuna - leilanidude - 02-02-2015
There are lots of volcanoes in the Pacific Ocean, including Japan.
RE: Mercury concentrations in Hawaiian yellowfin tuna - Wao nahele kane - 02-02-2015
Note the dates. Is this a possible source?
"China's coal production has more than doubled since 1990, from one billion tonnes then[4] to 2.72 billion in 2008."
Read more at: http://www.sourcewatch.org/index.php?title=China_and_coal
RE: Mercury concentrations in Hawaiian yellowfin tuna - leilanidude - 02-02-2015
Good point. You may be correct.