Saving Seafood

Pollutants in Fish Could Disrupt Your Defenses to Toxins

April 18, 2016 — Human defense mechanisms could be disrupted by the presence of a class of organic pollutants in fish and other food, according to new research.

The study, published in the journal Science Advances, appears to be the first to identify the mechanism by which chemicals like flame retardants—present in many household furniture items, like sofas and mattresses—and the pesticide DDT block a key protein from removing toxins from the body. P-glycoprotein, the protein in question, defends against toxins that entered the body by transporting them for removal. The new research shows that persistent organic pollutants, known as POPs, latch onto proteins and prevent them from functioning.

“These environmental chemicals form intimate interactions,” says study author Amro Hamdoun of the Scripps Institution of Oceanography at the University of California, San Diego. “But instead of being expelled, these proteins interfere with the ability of p-glycoprotein from doing its job.”

Awareness about the risks of POPs is nothing new. Public health campaigners have sought to remove POPs from the environment for decades, and a 2001 treaty even committed countries to take measures to reduce human exposure to the pollutants.

Read the full story at Time

Ocean souring on climate change

April 18, 2016 — The West Coast’s famously abundant fisheries are at risk as the region’s waters become more acidic, a group of scientists have warned.

The researchers, with the West Coast Ocean Acidification and Hypoxia Science Panel, this month released a report that projects dire changes to ocean chemistry and marine life, and recommends ways to avert it, including restoring kelp forests and eelgrass beds, and combating local marine pollution.

The panel, including Andrew Dickson, a professor of marine chemistry at Scripps Institution of Oceanography, convened in 2013 to study how global carbon emissions are lowering pH and reducing oxygen levels in the ocean off the West Coast.

“Although ocean acidification is a global phenomenon, emerging research indicates that the U.S.-Canadian West Coast will face some of the earliest, most severe changes in ocean carbon chemistry,” the report states.

Read the full story at The San Diego Union-Tribune 

Toxic pollutants found in fish across the world’s oceans

February 1, 2016 — When you go out for seafood, are you aware of what that fish on your plate might have been exposed to while swimming around in the world’s oceans? According to new research, fish populations around the world have been contaminated with industrial and agricultural pollutants known as persistent organic pollutants (POPs).

Researchers from the Scripps Institution of Oceanography at the University of California San Diego examined hundreds of peer-reviewed reports that stretched from 1969 through 2012. Some of the pollutants that were identified in the study included 20th century “legacy” toxins like DDT, which is banned in the U.S. and no longer widely used worldwide, and mercury, as well as more contemporary pollutants like coolants and other industrial chemicals like flame retardants.

“Based on the best data collected from across the globe, we can say that POPs can be anywhere and in any species of marine fish,” study co-author Stuart Sandin said in a press release.

However, there were some signs of improvement. The researchers found that the concentrations of pollutants contaminating fish populations have been dropping at a consistent rate over the past 30 years.

Read the full story at CBS News