Key words: grizzly bear, High Arctic, hybrid, Melville Island, microsatellite analysis, Northwest Territories, Paulatuk, polar bear, Ursus arctos, Viscount Melville Sound
The best-documented sighting during this period was by biologist Mitch Taylor: during a helicopter survey of Viscount Melville Sound on 4 May 1991, he observed a grizzly bear on the sea ice (73[degrees] 47'N, 112[degrees] 17'W) about 60 km south of the Dundas Peninsula, Melville Island (Taylor, 1995).
During a helicopter survey of southern Dundas Peninsula, Melville Island, on 25 July 2003, a field party was dropped off by helicopter inland of Viscount Melville Sound, near Cape Clarendon.
On the sea ice of Viscount Melville Sound, the remains of seals, as well as female polar bears and their cubs, have been attributed to kills by grizzly bears (Taylor, 1995).
They spent much of their time offshore, near or beyond the shelf break and in the polar pack ice of the estuary, or in Amundsen Gulf, M'Clure Strait, and Viscount Melville Sound.
Amundsen Gulf, M'Clure Strait, and Viscount Melville Sound are comparatively deep bodies of water (maximum depths = ca.
Viscount Melville Sound is also partially ice-free by mid-August.
Eight of these males arrived in Viscount Melville Sound between 25 and 31 July.
In the west, the highest dwell-times were in the Mackenzie Estuary and within a deep trench located within M'Clure Strait and Viscount Melville Sound.
In the Beaufort Sea and Baffin Bay regions, they also seek deep areas (300-600 m) in the summer, particularly in Viscount Melville Sound, Amundsen Gulf, and Peel Sound (Smith and Martin, 1994; Richard et al.
In 1993 and 1995, most males tagged in the Mackenzie Estuary moved to Viscount Melville Sound, where they remained in a deep trench 500+ m deep (Richard et al.