More outright fraud from polar bear researcher Steven Amstrup: "We have no evidence that they can forage successfully in open water or on land"

Was This Polar Bear a Victim of Climate Change? | Weather Underground

Polar bears' diet consists almost exclusively of ringed seals, so they must hunt on sea ice to find enough food, notes Dr. Steven Amstrup, the chief scientist at Polar Bears International.
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"We have no evidence that they can forage successfully in open water or on land," he said

The Polar Bear | Terrestrial Foraging

Feeding Habits based on Age and Gender

Terrestrial diet of summer bears includes: berries, seaweed, grass, carrion, eggs, sedges, rodents, birds, other vegetation and food wastes (Practical Dictionary of Siberia and the North, 2005). However there have been documented cases of polar bears hunting caribou and readily hunting birds (Derocher, Stirling and Andriashek, 1993.
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Feeding on berries in adult females can be linked to the required energy stores needed for successful reproduction (Derocher, Stirling and Andriashek, 1993, p. 252) and survival of the newborn cubs (Derocher, Lunn and Stirling, 2004, p. 165; Derocher, Stirling and Andriashek, 1993, p. 253).
Similarly, summer scavenging of reindeer carcasses in Svalbard by females with cubs may be a crucial aspect of cub survival in the family’s first spring (Derocher, Wiig and Bangjord, 2000, p. 677).