Marine Biologist Reacts to Polar Bear Footage That Changes Everything
Polar bears wore collar cameras so biologists could see if the bears can adapt to longer summers and shrinking sea ice. A marine biologist reacts to the surprising footage.
00:00 - Polar Bears
00:36 - Are Polar Bear Populations Recovering
01:55 - Can Polar Bears Survive Without Sea Ice?
03:05 - How Do Polar Bears Hunt Seals?
04:43 - Polar Bear Adaptations
05:43 - How Much Do Polar Bears Eat?
06:18 - How Many Polar Bears are Left?
08:56 - Polar Bears International
09:29 - Polar Bears and Climate Change
Polar Bears International → https://polarbearsinternational.org/a...
Polar bears are classified as marine mammals because they spend most of their lives on the Arctic Ocean, depending on sea ice for their food and habitat. The way ice moves, melts, and forms varies from region to region. The dynamics are so different that scientists from Polar Bears International divided the polar bear’s range into four distinct ecoregions. The Archipelago, Convergent, Divergent, and Seasonal Sea Ice Ecoregions.
Spread across these 4 regions are 19 distinct polar bear populations. 2 of the polar bear populations are growing. 4 are likely stable. 3 have seen significant loss in the number of bears. The other 10 polar bear populations are a complete mystery.
Polar bears have perfectly evolved to prey on ringed seals and bearded seals, which polar bears catch from atop the sea ice. Seals will cut 10 to 15 breathing holes in the ice and they’ll keep these holes open all winter long. Every 5-15 minutes, seals will surface to breathe at one of the holes or at air pockets trapped under the ice. Polar bears can smell a seal's breathing hole from more than half a mile away. When a seal surfaces… the polar bear strikes.
Polar bear heads are longer and more slender than other bears so they can fit into these holes. Even polar bear teeth are specialized for seals. Polar bears have a larger gap between their sharp, front canines and back molars. This is known as a diastema and it acts like a hook for a polar bear to snag a seal. Polar bear skulls have an elongated crest - the longest of any bear - giving polar bears the strength to pull a seal out of the water.
Healthy polar bears only eat the seal blubber, leaving the carcass for scavengers such as ravens and arctic foxes. One polar bear can eat 45 kg (or 100 lbs) of seal blubber in a single sitting, providing about a week’s worth of energy.
In 1980, there were 1,100 polar bears in the Seasonal Sea Ice Ecoregion. As of 2022 the population was just over 600 polar bears.
Sources
[1] https://polarbearsinternational.org/p...
[2] https://www.nature.com/articles/s4146...
[3] https://www.science.org/content/artic...
[4] https://royalsocietypublishing.org/do...
[5] https://www.sciencedirect.com/science...
[6] https://crowdsourcingsustainability.o...
[7] https://www.usgs.gov/search?keywords=...
Join the KPassionate channel:
/ @kpassionate
-------------------------
Check out KPassionate Patreon!
→ / kpassionate
-------------------------
Learn more → / kpassionate
→Twitch: / kpassionate
→Instagram: / kp.assionate
→TikTok: / k_passionate
→Discord: / discord
Merch
→https://shop.kpassionate.com
---------------------
Music
Cody Martin - soundstripe.com
Additional Imagery
USGS
NASA
World Wildlife Federation
Nature.ca
CGTN
San Diego Zoo
Mikhail Nilov
Kiliii Yuyan
markoconnell - soundstripe.com
ER Creative Services - stock.adobe.com
BlackBoxGuild - soundstripe.com
Creuxnoir - stock.adobe.com
Zacklabe.com
videodive - stock.adobe.com
Robbie Mallett - youtube.com
Fabrizio Moglia - stock.adobe.com
Nick Dale - stock.adobe.com
Ran Manolov
Anita Ritenour - flickr
hhuntington2 - stock.adobe.com
NSRECTube
Tatyana - stock.adobe.com
rickray - stock.adobe.com
Silver - stock.adobe.com
Vertop - stock.adobe.com
Ranel - stock.adobe.com
zech - stock.adobe.com
mcwehrle - soundstripe.com
Robert - stock.adobe.com
JensKlingebiel - soundstripe.com
WildlifewithDrBILL - youtube.com
Sam Junus/Wirestock Creators - stock.adobe.com
vasttt - soundstripe.com
MediaFuzeBox - soundstripe.com
Sky - stock.adobe.com
Jorm Sangsorn - stock.adobe.com
icsnaps - soundstripe.com
danr13 - soundstripe.com
Dmytro Kosmenko - stock.adobe.com
Skywardkick_Exclusive - soundstripe.com
#polarbear #bear #kpassionate