Franz Josef Land and snow bunting. Some ivory gulls, little auks and Brünnich's guillemots opt to spend the winter on the islands. The polar bear population of Franz Josef Land lies within the Barents Sea subpopulation, which also includes polar bears inhabiting Svalbard and the western coast of Novaya Zemlya. In 2004, the Barents Sea subpopulation was estimated at 2,650. There is also a population of Arctic fox, which typically have their territories near seabird habitats. Being declared as a marine mammal sanctuary, the island has rich biodiversity of rare marine mammals. Three species of seals habit the archipelago. Harp seal is the
Belushya Guba as an anchorage by Russian convoys between the Barents Sea and Archangelsk. A Soviet naval base was established in Belushya Guba in 1944. The settlement started to flourish in 1954, when Novaya Zemlya became established as a nuclear test site. In 1956, the whole indigenous population of Novaya Zemlya, mostly Nenets, were resettled from the islands. Belushya Guba is located in a deep bay with the same name, within a geographical area that is influenced by warm ocean currents. The natural conditions allow year-round sailing of all types and classes of vessels with minimal cost for icebreaking support. The bay