File this one under the more we know, the less we wish we knew.
A three-year study by Florida International University (FIU) and Bonefish & Tarpon Trust (BTT) has discovered pharmaceutical contaminants in the blood and other tissues of bonefish in Biscayne Bay and the Florida Keys.
Since the study began in 2018, FIU scientists and BTT research associates, in partnership with Sweden’s Umeå University and the University of Agricultural Sciences (SLU), have sampled 93 fish in South Florida, finding an average of seven pharmaceuticals per bonefish.
One bonefish had an incredible 17 pharmaceuticals in its system!
The list includes blood pressure medications, antidepressants, prostate treatment medications, antibiotics and pain relievers. Researchers also found pharmaceuticals in bonefish prey—crabs, shrimp and fish—suggesting that many of Florida’s valuable fisheries are exposed, not only the bonefish fishery.
While the amount of the drugs is minimal in most cases, and the level needed to cause harm to the fish is not known at this point, the fact that they are there, and widespread, and that multiple prescription drugs are involved indicates that southeast Florida and the Keys have sewage treatment and waste disposal issues.
According to the USGS, drugs get into U.S. sewage systems both because prescriptions consumed are not fully utilized in the human system and so go into the waste system, and also because most of us flush unused pills down the drain. While treatment gets rid of many of the harmful components of sewage, it evidently does not get rid of the remnant drugs. Read more