Fur seals

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Their Brain Temperature Drops When They DiveResearch on hooded seals illustrated a drop in brain temperature by 3 degree...
18/09/2022

Their Brain Temperature Drops When They Dive
Research on hooded seals illustrated a drop in brain temperature by 3 degrees Celsius over the course of a fifteen minute dive, in a process designed to reduce oxygen consumption by the brain. The seals circulated cold blood to the brain through the large superficial veins from their front flippers, ultimately reducing the brain's oxygen demand by an estimated 15-20%. This extends a seal's diving capacity substantially, and provides additional protection against hypoxic injury.

They Have "Smokers' Blood" To Help Survive Deep DivesBoth seals and heavy human smokers have high levels of carbon monox...
18/09/2022

They Have "Smokers' Blood" To Help Survive Deep Dives
Both seals and heavy human smokers have high levels of carbon monoxide in their blood streams. While humans acquire it from burning to***co, researchers think seals' blood carbon monoxide levels are connected to their deep dives. One study found that elephant seals' blood is around 10% carbon monoxide, which researchers attribute to the animals holding their breaths for about 75% of their lives. Exhaling is the only way for an animal to clear carbon monoxide from its body.

Mothers and Pups Bond With a Unique CallResearchers performed vocalization playback experiments on 18 breeding female ha...
17/09/2022

Mothers and Pups Bond With a Unique Call
Researchers performed vocalization playback experiments on 18 breeding female harbor seals to assess their abilities to recognize calls of their pup and to evaluate the effect of maternal protectiveness. They found that mothers were more responsive to the calls of their own pup than to non-filial pups after only three days. Mother seals' responses also varied depending on their protective behavior displayed towards their pup. And species of seals in which the young are more mobile and the colonies are more dense are more likely to strongly develop vocal recognition abilities.

The Largest Seal Weighs More Than Four Tons.A male southern elephant seal has an average weight of 8,000 pounds while fe...
11/09/2022

The Largest Seal Weighs More Than Four Tons.
A male southern elephant seal has an average weight of 8,000 pounds while females are much smaller. This drastically contrasts the smallest seal in the family of otariids, the Galapagos fur seal, which ranges between 60 to 140 pounds on average. Almost all seals, with the exception of the nearly-hairless walrus, are covered in thick fur, and have layers of fat to keep them warm called blubber.

"Earless" True Seals Actually Do Have EarsSeals' ability to hear can vary between species. "Earless" seals lack an exter...
09/09/2022

"Earless" True Seals Actually Do Have Ears
Seals' ability to hear can vary between species. "Earless" seals lack an external ear flap, present on fur seals and sea lions, but they still have ears present beneath the surface of the skin. True seals (phocids) hear higher frequencies under water than otariids (fur seals and sea lions), and the opposite is true for airborne sounds. All pinnipeds are more sensitive to underwater sounds than they are to airborne sounds.

Seals Are Related to Bears, Skunks, and BadgersEvolutionary biologists have been arguing over seals' origins for more th...
06/09/2022

Seals Are Related to Bears, Skunks, and Badgers
Evolutionary biologists have been arguing over seals' origins for more than a century. While relatively sure that pinnipeds evolved from land-dwelling carnivores, scientists are divided on the precise steps that occurred between terrestrial ancestors and modern marine mammals. Along with the three subclades of pinniped, the suborder Caniformia contains Ursidae (bears), Mustelidae (badgers, otters, weasels, and relatives), and Mephitidae (skunks and stink badgers). In 2007, a nearly complete skeleton of a new semi-aquatic carnivore from an early Miocene lake deposit in Nunavut, Canada, was discovered and became known as an evolutionary link between land mammals and seals.

How long do fur seals live?Male northern fur seals can live up to 18 years, while females can live up to 27 years
05/09/2022

How long do fur seals live?
Male northern fur seals can live up to 18 years, while females can live up to 27 years

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