The hypotheis in the study is that zebra mussels change lake chemistry in a way that alters pre-existing, inert mercury into a form that can be absorbed by bugs and other organisms in the food chain. As game fish directly eat bugs and small organisms that have higher levels of mercury in their systems or indirectly by eating baitfish that preyed upon contaminated bugs and small organisms, mercury levels in game fish increase.
The higher mercury levels are not from game fish directly eating zebra mussels.
Karry Kyllo
Posts: 1269
November 21, 2024 at 11:14 am
#2300524