My previous post involving in part egg production got me thinking back to my college environmental studies classes--poisons, including radioactives, tend to concentrate up the food chain, especially in things like eggs and milk. Again, I am half-remembering recent work being done with algaes to capture and concentrate radioisotopes in watersystems that have had radioactive contamination. Shellfish are also notorious collectors of poisonous substances by nature of their being filters.
Hmmm...the only problem is, you couldn't eat the clams or oysters grown, or feed the algae to your livestock. This could be a fun thing to throw at hungry, unsuspecting, or larcenous PC's., or use as a Deus-ex-machina booby trap to take out raiders to the PC's food supply. "Oh, sorry, we forgot to warn you about eating clams out of season"
