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.
PCB-contaminated sediments in lakes or rivers can slowly release PCB back into water, from which it eventually evaporates. In water, a small amount of PCBs may remain dissolved, but most stick to organic particles and bottom sediments. PCBs are taken up by small organisms and fish in water. They are also taken up by other animals that eat these aquatic animals as food. PCBs accumulate in fish and marine mammals, reaching levels that may be many thousands of times higher than in water. Farmed salmon contain higher levels of PCBs than wild ones.