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Favorite Images of Kermode Bears
Animals list created by kathy
A list of my favorite images of Kermode bears.
The Kermode bear (Ursus americanus kermodei), also known as the "spirit bear" (particularly in British Columbia), is a rare subspecies of the American black bear living in the Central and North Coast regions of British Columbia, Canada.
While most Kermode bears are black, there are between 100 and 500 fully white individuals. The white variant is most common on three islands in British Columbia (Gribbell, Princess Royal and Roderick), where 10–20% of bears are white.
Kermode bears hold a prominent place in the oral traditions of the indigenous peoples of the area. It is the official provincial mammal of British Columbia.
The Kermode bear was named after Frank Kermode, former director of the Royal B.C. Museum, who researched the subspecies and was a colleague of William Hornaday, the zoologist who described it.
White Kermode bears are not albinos as they still have pigmented skin and eyes. Rather, a single, non-synonymous nucleotide substitution in the MC1R gene causes melanin to not be produced. This mutant gene is recessive, so Kermode bears with two copies of this mutant, nonfunctional gene appear white, while bears with one copy or no copies appear black.
It is possible for two black bears to mate and produce a white cub if both of these black bears are heterozygous, carrying one copy of the mutant MC1R gene, and both mutant genes are inherited by the cub.
Additional genetic studies found that white Kermode bears breed more with white Kermode bears and black Kermode bears breed more with black Kermode bears in a phenomenon known as positive assortative mating. One hypothesis is that this happens because young bears imprint on their mother's fur color.
Kermode bears are omnivorous for most of the year, subsisting mainly on herbage and berries except during autumn salmon migrations, when they become obligate predators.
During the day, white bears are 35% more successful than black bears in capturing salmon. Scientists have also found that salmon evade large, black models about twice as frequently as they evade large white models, giving white bears an advantage in salmon hunting.
On some islands, white Kermode bears have more marine derived nutrients in their fur, indicating that white Kermode bears eat more salmon than the black Kermode bears.
53 votesMy Bear Images Collection (15 lists)
list by kathy
Published 6 years, 5 months ago
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