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Nov 15, 2015 · Dickenson describes pinnepeds, the clade of carnivorous, semi-aquatic mammals that include the Phocidae, or true seals, which are the focus of this book. If you have not spent much time along a coast where seals are common, then the pinniped you are likely the most familiar with is actually a sea lion.
- (22)
- Paperback
adult males African fur seal animals Año Nuevo Island Antarctic fur seal Arctic areas Australian sea lion bearded seals biology of marine Boeuf Bonner breeding season bulls California sea lions cetaceans colony copulate crabeater seal dive fish food resources foraging Galápagos fur seal Galápagos sea lion give birth grey seals groups harbor seals harp seals Hawaiian monk seal Hooded seal ...
- Seals Are Related to Bears, Skunks, and Badgers
- "Earless" True Seals Actually Do Have Ears
- The Largest Seal Weighs More Than Four Tons
- Mothers and Pups Bond with A Unique Call
- They Have "Smokers' Blood" to Help Survive Deep Dives
- The Baikal Seal Is The World's only Freshwater Pinniped
- Their Brain Temperature Drops When They Dive
- They Can Eat A Lot of Seafood
- Climate Change Is Their Newest Threat
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 cont...
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 pinniped...
A male southern elephant seal has an average weight of 8,000 pounds—quite the hefty seal fact—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...
Researchers performed vocalization playback experiments on 18 breeding female harbor seals to assess their abilities to recognize the calls of their pups 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' respo...
Both seals and heavy human smokers have high levels of carbon monoxide in their bloodstreams, a lesser-known seal fact. While humans acquire it from burning tobacco, 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 att...
One of the smallest true seals, the Baikal represents the seal's evolutionary journey from terrestrial to semi-aquatic, when seals likely spent time in freshwater before making their transition from land to oceans. Lake Baikal, a freshwater lake in Siberia, is home to a whole host of interesting creatures and is the oldest and deepest lake on the p...
Research on hooded seals illustrated a drop in brain temperature by 3 degrees Celsius over the course of a 15-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 es...
Because seals are typically found along coastlines, they primarily consume fish, squid, and shrimp, as well as other crustaceans, mollusks, and zooplankton organisms. Researchers theorize that their terrestrial ancestors were insectivores.Larger seals can eat 10 pounds of food per day. As some populations have increased in recent decades, researche...
In the last century, both the Japanese sea lion and the Caribbean monk seal have become extinct, the latter considered a harbinger of human-caused extinction in coral reef systems. Historically, seals have faced threats from hunting, accidental trapping, marine pollution, and conflicts with local people.More recently, seals face a new threat in the...
The placental mammal order Carnivora encompasses many charismatic taxa, from dogs and cats to bears, otters, hyaenas, and seals. Perhaps more than any other mammalian clade, carnivorans are a source of fascination for humans, partially due to our intimate observation of the domesticated species that reside in many of our own homes.
- Anjali Goswami
- 2010
May 1, 2016 · Then, the book goes into the types of seal families, which there are three different families. The book also talks about the smallest seal, the biggest seal, and the different characteristics a seal has. The book ends by saying that seals are normally kept in captivity and trained to do tricks for entertaining people. Evaluation: "All about ...
- (3)
- Paperback
- Ibi Kaslik
This book was a project between myself, Danielle (Mama), and my daughter, Zehnya, age 6. Danielle: Zehnya's new favourite toy is a big seal called Elemeno, I suggested we make a book on seals, and she agreed. I opened Wikicommons, and searched for public domain photos of seals. Zehnya: I picked the seal photos out for the book, they were very cute.
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The oldest definitive pinniped fossils date from approximately 30.6–23 million years ago (Ma) in the North Pacific. Pinniped monophyly is consistently supported; the group shares a common ancestry with arctoid carnivorans, either ursids or musteloids. Crown pinnipeds comprise the Otariidae (fur seals and sea lions), Odobenidae (walruses), and Phocidae (seals), with paraphyletic ...
