Why do Atlantic walruses in island chains like the Canadian Arctic tend to rest on land more routinely than their Pacific relatives?

Answer

Their prime feeding grounds are often situated closer to shore

A key behavioral distinction observed between the two main walrus subspecies relates to their choice of substrate for hauling out—sea ice versus land. Atlantic walruses, particularly those inhabiting the island chains of the Canadian Arctic, exhibit a tendency to rest on land more consistently compared to Pacific walruses. This behavior is linked to the geography of their feeding areas; their prime benthic feeding grounds are frequently located in closer proximity to the shoreline. This geographical reality means they do not need to rely as heavily on drifting sea ice as a resting platform between foraging dives, allowing for more frequent and observable terrestrial congregations.

Why do Atlantic walruses in island chains like the Canadian Arctic tend to rest on land more routinely than their Pacific relatives?

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