Warmer oceans could raise mercury levels in fish

Oct 03, 2013
Dartmouth and other researchers studied killifish under varying temperatures in the lab and in salt marsh pools in Maine. Credit: NOAA

Rising ocean surface temperatures caused by climate change could make fish accumulate more mercury, increasing the health risk to people who eat seafood, Dartmouth researchers and their colleagues report in a study in the journal PLOS ONE.

Until now, little has been known about how global warming may affect mercury bioaccumulation in marine life, and no previous study has demonstrated the effects using fish in both laboratory and field experiments. Mercury released into the air through industrial pollution can accumulate in streams and oceans and is turned into methylmercury in the water.

The researchers studied killifish under varying temperatures in the lab and in salt marsh pools in Maine. Fish in the marshes ate insects, worms and other natural food sources, while the lab fish were fed mercury-enriched food. Results showed the in warmer waters ate more but grew less and had higher methylmercury levels in their tissues, suggesting increases in their metabolic rate caused the increased uptake of the toxic metal.

Explore further: Concerns over mercury levels in fish may be unfounded

More information: www.plosone.org/article/info%3… journal.pone.0058401

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User comments : 7

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Humpty
2.1 / 5 (19) Oct 03, 2013
I think researchers who are always couching their results in "May" and "Could" and "Suggests" as a straight forward kind of a verifiable issue, should be dragged out and shot.

I am tired of reading about "Oh it might / could / indicates / appear too" being served up as quantifiable fact.
Neinsense99
2.1 / 5 (14) Oct 03, 2013
I think researchers who are always couching their results in "May" and "Could" and "Suggests" as a straight forward kind of a verifiable issue, should be dragged out and shot.

I am tired of reading about "Oh it might / could / indicates / appear too" being served up as quantifiable fact.

Your comment speaks for itself, and what it says is not flattering.
VendicarE
3 / 5 (7) Oct 03, 2013
"I think researchers who are always couching their results in "May" and "Could" and "Suggests" a straight forward kind of a verifiable issue, should be dragged out and shot." - Humpty

I think that Humpty is absolutely certain that the sun will rise tomorrow.

As scientists, we know that there is no certainty in Humpty's belief.

He is an intellectual child.

Scarlett
1.5 / 5 (15) Oct 04, 2013
"Warmer oceans could raise mercury levels in fish"

I guess it's a good thing the oceans have been COOLING OFF for at least the last 15 years, then, huh?

Another purely political, anti-science alarmist piece from Phys.org! :D
VendicarE
3.1 / 5 (7) Oct 04, 2013
Another lie from the denialist camp.

"I guess it's a good thing the oceans have been COOLING OFF for at least the last 15 years, then," - ScarletTard

In fact as the following plot shows, global average ocean temperatures have risen by about 0.01'C since 2000.

http://www.woodfo...rom:2000

We expect to see ocean temperatures increase at that kind of rate since the heat capacity of water is 2 orders of magnitude greater than that of air.

ScarletTard is incapable of comprehending that fact.
Humpty
1.4 / 5 (11) Oct 06, 2013
According to research, it current indicates, that all the people who have appeared to have responded to this post, could actually have responded and may in fact have responded, which might, demonstrate that they could have appeared to have responded, which appears to support current research.

However the results are merely indicative.
Howhot
4 / 5 (4) Oct 09, 2013
According to research, it current indicates, that all the people who have appeared to have responded to this post, could actually have responded and may in fact have responded, which might, demonstrate that they could have appeared to have responded, which appears to support current research.

However the results are merely indicative.


And thus spoke a once spoiled cute little boy, now stoned and being an ass.