the island, fish comprise 28% of their diet. In Hokkaido, the brown bears' diet includes small and large mammals, fish, birds, and insects such as ants. Recent increases in size and weight, reaching , or possibly up to to , are largely caused by feeding on crops. Non-aggressive interactions with humans On Shiretoko Peninsula, especially in the area called "Banya", many females with cubs often approach fishermen and spend time near people. This unique behavior was first noted more than a half century ago, with no casualties or accidents ever recorded. The females are thought to take cubs to approach fishermen to avoid encountering aggressive adult males. Interactions with tigers Ussuri brown bears are occasionally preyed on by Siberian tigers, and constitute about 1% of their diet (and up to 18.5% together with Asian black bears in very particular cases). When preying on bears, tigers regularly target young bears, but adult female Ussuri brown bears are also taken outside their dens. Siberian tigers most typically attack brown bears in the winter in the bears' hibernacula. They are typically attacked by tigers more often than the smaller black bears, due to their habit of living in more open areas and their inability to climb trees. When hunting bears, tigers position themselves from the leeward side of a rock or fallen tree, waiting for the bear to pass by. When the bear passes, the tiger springs from an overhead position and grab the bear from under the chin with one forepaw and the throat with the other. The immobilised bear is then killed with a bite to the spinal column. After killing a bear, the tiger will concentrate its feeding on the bear's fat deposits, such as the back, legs and groin. Tiger attacks on bears tend to occur when ungulate populations decrease. From 1944 to 1959, more than 32 cases of tigers attacking bears were recorded in the Russian Far East. In the same period, four cases of brown bears killing female and young tigers were reported, both in disputes over prey and in self-defense. Gepnter et al. (1972) stated bears are generally afraid of tigers and change their path after coming across tiger trails. In the winters of 1970–1973, Yudakov and Nikolaev recorded one case of brown bear showing no fear of the tigers and another case of brown bear changing path upon crossing tiger tracks. Large brown bears may