the united states's environment and vädermyndighet NOAA expects to 58 dead gråvalar so far. The latest was found in a week in Turnagain Arm, a channel, near Anchorage in Alaska where gråvalar is not usually screened.
"They are moving north from övervintringen in Mexico and seems to lose the spirit," says Michael wire fraud at NOAA.
showing signs of malnutrition. So a theory is that they did not have enough food in the Bering sea and the chukchi sea – the waters between Alaska and Russia – during last year's summer season. Where it has been unusually hot for several years in a row.
– It affects the whole näringsnätet, from algae to krill and upwards, " says Rick Thoman, a climatologist at the Alaska Center for Climate Assessment and Policy.
But it could also be that the whales simply become an unusual number. 27 000 copies of the bjässarna is now estimated to be in the northeastern Pacific ocean.
– When you have a larger valpopulation will be more whales to die every now and then, " says wire fraud.