About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Concentration of Mercury in Fish Responds Directly to Changes in Its Deposition

by Gandhi on September 19, 2007 at 3:07 PM
Font : A-A+

Concentration of Mercury in Fish Responds Directly to Changes in Its Deposition

A study conducted as a joint venture between Canadian-American research teams has established that changes in the atmospheric deposition of mercury is reflected directly on its concentration in fish. This is a first of its kind and as a part of the study, the researchers conducted a whole ecosystem experiment, increasing the mercury load to a lake and its watershed by the addition of enriched stable mercury isotopes.

The isotopes allowed the scientists to distinguish between experimentally applied mercury and mercury already present in the ecosystem and to examine bioaccumulation of mercury deposited to different parts of the watershed.

Advertisement

The researchers found that fish methylmercury concentrations responded rapidly to changes in mercury deposition over the first three years of study.

"Up to now a direct link has been difficult to establish because of all the other factors that affect mercury levels in fish and large pools of mercury already in the environment. By adding stable mercury isotopes to an entire ecosystem for several years, our team was able to zero in on the effects of changing atmospheric mercury deposition," said lead author Reed Harris of Tetra Tech.
Advertisement

"The results were very dramatic. Using the stable isotope approach has revealed a great deal about the cycling of mercury in watersheds. We look forward to continuing our study to provide guidance in mitigating the legacy left by the years of high mercury deposition,' added co-author Dr. Andrew Heyes of the University of Maryland Center for Environmental Science Chesapeake Biological Laboratory.

Dr. Heyes said the study showed the "clear benefits of regulating mercury emissions, and the near-term effectiveness of emission reductions".

"This is good news. It means that a reduction in new mercury loads to many lakes should result in lower mercury in fish within a few years," added Harris.

The international research began in 2001 at the Experimental Lakes in Northern Ontario, and is featured in this week's Proceedings of the National Academy of Sciences.

Source: ANI
GAN/C
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News Category
What's New on Medindia
Health Benefits of Sea Buckthorn
Contraceptive Pills in Polycystic Ovary Syndrome (PCOS) Curtail Type 2 Diabetes Risk
Mushroom May Help Cut Down the Odds of Developing Depression
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Fish Health Benefits Benefits of Meditation / Meditation Therapy Fish: The Best and The Worst Seven Surprisingly Healthy Foods Health Benefits of Tuna Fish 

Recommended Reading
Advantages of Eating Fish Foods - Caution on Mercury
Fish found in polluted water is not safe for consumption as some of them could unhealthy levels of ....
Benefits of Meditation / Meditation Therapy
Meditation therapy is one of the best Alternative Therapies. It is a Mind-Body Medicine....
Fish Health Benefits
Fish is one of the staple food of coastal inhabitants. Nutrition in fish includes protein, calcium a...
Fish: The Best and The Worst
Some fish are contaminated with high levels of methyl mercury. Methyl mercury is a neurotoxin, which...
Health Benefits of Tuna Fish
Tuna, a low glycemic index (GI) food, is rich in selenium, niacin, Vitamin (B12, B6), protein. It pr...
Seven Surprisingly Healthy Foods
Here are some food items whose health advantage may come as a surprise to you....

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use