Dolphin

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Introduction1

Dictionary

dolphin : any of various small marine toothed whales (family Delphinidae) with the snout more or less elongated into a beak and the neck vertebrae partially fused

Note: While not closely related, dolphins and porpoises share a physical resemblance that often leads to misidentification. Dolphins typically have cone-shaped teeth, curved dorsal fins, and elongated beaks with large mouths, while porpoises have flat, spade-shaped teeth, triangular dorsal fins, and shortened beaks with smaller mouths. — Webster   See also   OneLook

Encyclopedia

Dolphins are a widely distributed and diverse group of aquatic mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and Pontoporiidae (the brackish dolphins), and the extinct Lipotidae (baiji or Chinese river dolphin). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Their closest living relatives are the hippopotamuses, having diverged about 40 million years ago. — Wikipedia

Dolphin (Encyclopædia Britannica)

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Innovation

Science

Biology is the scientific study of life. Biologists study life at multiple levels of organization, from the molecular biology of a cell to the anatomy and physiology of plants and animals, and evolution of populations. Biologists also study and classify the various forms of life, from prokaryotic organisms such as archaea and bacteria to eukaryotic organisms such as protists, fungi, plants, and animals. — Wikipedia

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Preservation

Library

Subject: Dolphin (WorldCat)

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Participation

Education

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources

Community

Occupation

Zoologists and Wildlife Biologists (CareerOneStop, U.S. Department of Labor, Employment and Training Administration)

Organization

American Institute of Biological Sciences

News

BioScience (American Institute of Biological Sciences)
Dolphin (EurekaAlert, American Association for the Advancement of Science)
Dolphin (Phys.org)
Dolphin (Science News)
Dolphin (NPR Archives)

Government

Document

Dolphin (USA.gov)

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More News …


Dolphins and Whales News -- ScienceDaily Whales and dolphins. Whale songs, beaching, endangered status -- current research news on all cetaceans.

  • Gray whale numbers continue decline
    on October 10, 2022 at 3:54 pm

    Gray whales that migrate along the West Coast of North America continued to decline in number over the last 2 years, according to a new assessment. The population is now down 38 percent from its peak in 2015 and 2016, as researchers probe the underlying reasons.

  • Sound reveals giant blue whales dance with the...
    on October 5, 2022 at 5:29 pm

    Tracking blue whales by their booming vocalizations, researchers have revealed how these ocean giants find dense aggregations of food.

  • Detailed observation of orcas hunting white...
    on October 4, 2022 at 9:58 pm

    A new article presents direct evidence of orcas killing white sharks in South Africa.

  • Long-term tracking of whale feeding behavior via...
    on October 3, 2022 at 8:45 pm

    Researchers have developed a new satellite tag that allows them to better track whales' behavior, including previously unobservable feeding events during dives.

  • Family ties give animals reasons to 'help or...
    on September 26, 2022 at 3:49 pm

    The structure of family groups gives animals an incentive to help or harm their social group as they age, new research shows.


Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Disease carried by cats, pigs kills two spinner...
    on November 18, 2022 at 4:23 pm

    Two spinner dolphins died from toxoplasmosis after becoming infected with the parasite Toxoplasma gondii, according to researchers at the University of Hawaiʻi at Mānoa Health and Stranding Lab. One dolphin was stranded on Hawaiʻi Island in 2015 and the other on Oʻahu in 2019.

  • Learning from animal evolution to reproduce...
    on November 7, 2022 at 7:45 pm

    Through millions of years of evolution, nature has produced biological systems with exceptional properties and functionalities. Many organisms have adapted to their particular environment by creating extraordinarily efficient materials and structures. These materials are optimized in terms of their mechanical, thermal, and optical properties in a way that sometimes even technology is still unable to reproduce.

  • Prehistoric reptile casts turn out to be copies...
    on November 2, 2022 at 1:43 pm

    Scientists found copies of a lost fossil destroyed in WWII hiding in a U.S. museum.

  • Playing sea soundscapes can summon thousands of...
    on October 27, 2022 at 5:10 pm

    Imagine you're in a food court and spoilt for choice. How will you choose where to eat? It might be the look of the food, the smell, or even the chatter of satisfied customers.

  • New peril for gray whale survival? Predatory...
    on October 24, 2022 at 5:50 pm

    A deadly new threat may be on the horizon for gray whales—a species already suffering from a mysterious decline in population.

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Related

Here are links to pages about closely related subjects.

Knowledge Realm

Terrestrial   (Earth)

Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
Animal
Invertebrate
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Vertebrate
Fish Seahorse, Ray, Shark
Amphibian Frog, Salamander
Reptile Turtle, Tortoise, Dinosaur
Bird Penguin, Ostrich, Owl, Crow, Parrot
Mammal Platypus, Bat, Mouse, Rabbit, Goat, Giraffe, Camel, Horse, Elephant, Mammoth
Walrus, Seal, Polar Bear, Bear, Panda, Cat, Tiger, Lion, Dog, Wolf
Cetacean Whale, Dolphin
Primate Monkey, Chimpanzee, Human

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Notes

1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.