Pacific gray whale 'declining'

Pacific gray whale 'declining': "Reduced numbers of gray whales will also have an impact on other species in the Pacific Ocean, the researchers add. The whales dig troughs in the seabed for food, sending food to the surface which other animals live on. The feeding plumes of gray whales also provide foraging grounds for Arctic seabirds. 'Despite our best efforts these genetic results suggest gray whales have not fully recovered from whaling. They might be telling us that whales now face a new threat - from changes to the oceans that are limiting their recovery,' said Professor Palumbi. 'Decades ago, whales were the first creatures to tell us that we were overfishing the oceans. Maybe now they trying to tell us the oceans are in deeper trouble.'"