• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
    • přihlásit
    registrace
    ztracené heslo?
    KEVIN00Chobotnice
    KEVIN00
    KEVIN00 --- ---
    +6
    I chobotnice mají záchvaty vzteku. „Fackují“ během nich ryby
    Chobotnice jsou fascinující živočichové, kteří se vyznačují mimořádně vysokou inteligencí. Pokud ale zrovna mají špatnou náladu, nejdou daleko pro ránu. Alespoň podle výzkumu zveřejněného v žurnálu Ecology.

    KEVIN00
    KEVIN00 --- ---
    CEPHALOPODS’ INVISIBILITY POWERS COULD SOMEDAY BE OURS, NOW THAT WE KNOW HOW TO CONTROL THEM
    If you’ve ever wanted your own invisibility cloak, just like Harry Potter's, it could soon be (sort of) possible.

    The wizardry of changing color, or at least wearing something which changes color, might be more than just fantasy. Reflectins are the light-reflecting proteins that make cephalopods like squid, octopi, and cuttlefish such masters of disguise. These proteins reflect light to help a cephalopod disappear into its surroundings so it seems invisible to predators. Now scientists at UC Irvine have finally figured out the structure of reflectins at a molecular level and are able to manipulate them — almost like magic.

    KEVIN00
    KEVIN00 --- ---
    Octopuses Are Eight-Armed Taskmasters
    Even a crafty hunter like an octopus sometimes needs help. On tropical coral reefs around the world, the day octopus scours the seafloor in search of tiny mollusks and crustaceans that hide within calcified crevices. But every so often, this prey eludes the octopus’s many-armed grasp. Unfortunately for the fleeing prey, groups of fishes—sometimes four or five different species—might be lying in wait, ready to cut off its escape and leaving it within the octopus’s reach.

    KEVIN00
    KEVIN00 --- ---
    +1
    https://phys.org/news/2020-12-reveal-molecular-secrets-cephalopod-powers.html
    Reflectins, the unique structural proteins that give squids and octopuses the ability to change colors and blend in with their surroundings, are thought to have great potential for innovations in areas as diverse as electronics, optics and medicine. Scientists and inventors have been stymied in their attempts to fully utilize the powers of these biomolecules due to their atypical chemical composition and high sensitivity to subtle environmental changes.

    KEVIN00
    KEVIN00 --- ---
    +1
    Molecular Secrets of Cephalopod Skin
    Cephalopods—a class of marine animals that includes squids, octopuses and cuttlefish—can readily change the appearance of their skin to blend into their surroundings or mimic other species. These stunning camouflage abilities come from optical components in the skin, such as light-reflecting cells and pigmented organs, along with an underlying musculature that alters the skin’s texture and shape.

    KEVIN00
    KEVIN00 --- ---
    MBL Virtual Programs
    These free events are part of the MVP (MBL Virtual Programs) webinar series. This virtual series ran from July 6-17 and included offerings from many of our summer programs including the advanced research training courses and the Logan Science Journalism program. We are very excited to reconnect with our friends and colleagues, learn from distinguished speakers, and engage in lively scientific discussion. Webinars were recorded and are available for viewing via the links below.

    KEVIN00
    KEVIN00 --- ---
    +1
    ..Chobotnice.. - Mořští mistři intelektu - Dokument CZ HD (2020)
    https://www.youtube.com/watch?v=NEOd1U6ceKA&ab_channel=BooktoCZ
    KEVIN00
    KEVIN00 --- ---
    +2
    Specieswatch: each octopus arm may have a mind of its own
    Mollusc’s neurons located in body and arms enable complex work independent of central brain

    KEVIN00
    KEVIN00 --- ---
    Madrona Point Nov 28 2020
    https://www.youtube.com/watch?v=WSvNNgmRMhs&feature=emb_title
    KEVIN00
    KEVIN00 --- ---
    +1
    Under Water Time Lapse Video: Octopus Cleaning Self at Mukilteo TDock
    https://www.youtube.com/watch?v=at9Lc19sBcE&feature=emb_title
    KEVIN00
    KEVIN00 --- ---
    +3
    Octopuses taste their food when they touch it with their arms

    Octopuses can taste their prey before eating it by using their arms to “lick” it, which researchers say adds to evidence that the cephalopods’ eight appendages are analogous to tongues with “hands” and “brains”.

    KEVIN00
    KEVIN00 --- ---
    +2
    How Octopuses Use Their Suction Cups to Taste Through Touch
    A new study reveals that the invertebrates use a novel kind of receptor embedded in their suckers to explore their ocean habitats.

    KEVIN00
    KEVIN00 --- ---
    +1
    How octopuses taste their meals by touching them, according to a new study
    "A lot of people say an octopus is like an alien," says filmmaker Craig Foster in his new Netflix documentary "My Octopus Teacher."
    "But the strange thing is, as you get closer to them you realize that you're very similar in a lot of ways."

    KEVIN00
    KEVIN00 --- ---
    +1
    When It Comes to Octopuses, Taste Is for Suckers
    Octopuses can taste what their arms touch, and scientists have figured out how.

    KEVIN00
    KEVIN00 --- ---
    +1
    Touch and taste? It’s all in the suckers
    Octopuses have captured the human imagination for centuries, inspiring sagas of sea monsters from Scandinavian kraken legends to TV’s “Voyage to the Bottom of the Sea” and, most recently, Netflix’s less-threatening “My Octopus Teacher.” With their eight suction-cup covered arms, their very appearance is unique, and their ability to use those appendages to touch and taste while foraging further sets them apart.

    KEVIN00
    KEVIN00 --- ---
    +1
    Molecular Basis of Chemotactile Sensation in Octopus
    • The distributed octopus arm nervous system uses unique chemotactile receptors (CRs)
    • CRs detect poorly soluble natural products mediating touch-taste arm behavior
    • CRs form ion channel complexes to mediate diverse signal detection and filtering
    • Signals transduced by specific sensory cells regulate complex exploratory behavior

    KEVIN00
    KEVIN00 --- ---
    ZUULUU: Dokument je na nástěnce, ale to není důvod k mazání příspěvků :)
    GOZER1
    GOZER1 --- ---
    +3
    Dobrodružství vědy a techniky: Chobotnice - mořští mistři intelektu — iVysílání — Česká televize
    https://www.ceskatelevize.cz/ivysilani/1098111603-dobrodruzstvi-vedy-a-techniky
    GOZER1
    GOZER1 --- ---
    ±0

    https://a.aliexpress.com/_mPdCHRp
    KOZINA
    KOZINA --- ---
    KEVIN00: co a odkud jí to vyjíždí v 3:09?
    Kliknutím sem můžete změnit nastavení reklam