Check out the "Orcanet" orca tracking website for recent Photo Blog and news about orcas from the Pacific Coast.
Conservation Concern: Pollutants in the Ocean
Orcas as an apex predator are one of the most susceptible mammals to bioaccumulation of human-made contaminants. As mammals, we store pollutants in our fatty tissue. As apex predators which feed at the top of the food chain, orcas are consuming chemicals stored in their prey and then concentrating them in their own fat. The levels of PCBs and DDEs in the orca's blubber layer is frightening. This contaminant load will compromise their immune system making them more prone to disease and may lower reproductive success. This is bad news for these marvelous whales. We humans need to clean up our act and our oceans.