It is my understanding that mercury is a byproduct of salt. The larger a fish gets, the more it eats from that environment, the more its body transforms that salt content into mercury. Case in point; Barracuda is considered edible until it reaches a certain size, at which time the mercury content is considered dangerous.
In a fresh water environment, salinity is minimal and unless it receives large amounts of salt from an outside source, I dont "THINK" mercury is an issue.
I've seen a lot of warnings on public water regarding fish consumption, but it usually pertains to carcinogens that have been industrially introduced into the system. Never saw one regarding mercury.
.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!
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