1 silver AlertA Silver Alert has been issued for Rebecca Anne Manktelow by the N.C. 2  silver AlertA Silver Alert has been issued for Tyrese Grant by the N.C. 3  silver AlertA Silver Alert has been issued for Olivia Strong by the N. 4 C. silver AlertA Silver Alert has been issued for Tyler Isiah McCormick by the N. C.
While this mutation allows the Hudson River tomcod to thrive in toxic waters, its effect on other organisms in the ecosystem is likely not so positive. Tomcod that carry the mutation can withstand high levels of PCBs, which are stored in the fishes' fat.
A number of studies show that farmed salmon accumulate PCBs from the fishmeal they are fed. The feed is often designed to have high amounts of fish oil and is made largely from ground-up small fish. PCBs concentrate in oils and fat, and previous tests of salmon feed have consistently found PCB contamination.