Tag: "snail" at biology news

Drilled shells show extinction's lasting effects

Give a marine snail an easy life, and it will take its time drillingin... while thesnails risk losing their prey to another snail or being attackedthemselves by fish, crabs or other predators. High levels of competition should fa...

New painkiller was born in Utah

...e painkiller in the venom of the fish-hunting cone snail Conus magus, or magician's cone, which is about 1.5 inches long and thus too small to kill people it stings, as do some larger cone snails. McIntosh discovered a component or "factor" in the venom affected the nervous system. He purified it and det...

Biological clock may shut down long-term memory at night

...es several forms of long-term memory in the marine snail Aplysia. These studies involved experiments on the defensive reflexes and feeding responses of Aplysia. Eskin's results showed that Aplysia form long-term memory when they are trained during the day but not when they are trained at night. However...

Molecular miners find pain relief drugs from the sea

...ced in the venom of Conus victoriae, a marine cone snail found in tropical waters off the coast of Australi...many as 30 people are known to have died from cone snail envenomation. The cone snails that are dangerous to humans feed on fish by impaling them with a har...

Marine snail's neural network sheds light on the basis for flexible behavior

From snail to man, one of the hallmarks of the brain is the e...ow a relatively simple motor network of the marine snail Aplysia produces variants of a particular feeding behavior, researchers have found that the ability ...

DNA barcodes put to the test

...isit the issue with a diverse, extensively studied snail group, the ubiquitous, tropical marine cowries whose shell can command over $30,000. Meyer and Paulay found that while the barcode worked well for identifying specimens in highly characterized groups, it was much more error prone when used to discove...

Surprising killer of southeastern salt marshes: Common sea snails

...reefold. Outside the cages, in 11 of the 12 sites, snail overgrazing converted healthy marsh to exposed mudflats in as little as three months. When snail density was high, destruction was more extensive. Researchers also wanted to test the notion that in...

The rising tide of ocean plagues: How humans are changing the dynamics of disease

...ifornia. One particular worm starts its life in a snail where it reproduces and is released to the water a...e feces of birds and starts all over with the next snail encounter. "Trematodes require all of the pieces of the puzzle to complete their life cycle when ...

Lefties have the advantage in adversarial situations

...n the same direction. The overwhelming majority of snail species are right-handed -- their shells coil clockwise. Dietl studied a species of snail that are lefties, and have shells that coil counterclockwise. The left-handed advantage is realized...

Biotechnology Study Center honors Jean-Pierre Changeux, Charles Weissmann and Eric Kandel

...age in mice and implicit memory storage in the sea snail Aplysia, a simple organism that he has established as the model organism of choice in neurobiology. Working with Aplysia, he has recently raised the possibility that an active, prion-based mechanism maintains the persistence of long-term memory. Prev...

How healthy is that marsh? Biologists count parasites

...s. The worms' lifecycle thus typically begins in a snail and ends in a bird, with the intermediate host ani...mperial Beach at the U.S.-Mexico border. "The horn snail is a mobile data recorder," Lafferty said. "It is a hub for more than 20 trematode species." If any ...

Study shows that parasites form the thread of food webs

...s in the Carpinteria Salt Marsh food web. A common snail is the first intermediate host to at least 19 diff...as final hosts. The authors found that without the snail and its trematodes, 977 links would disappear from the corresponding food web. In related work, Laff...

Deadly cone snails liven up Philadelphia Shell Show, Oct. 7-8

Philadelphia -- A ruthless fish-eating snail holds the promise of relief from chronic pain, acc...ook. For years Olivera has been working with cone snail venom to develop a drug that would provide relief to people with chronic pain. He also has been work...

A new tool against brain disease

... "We discovered a new toxin from a venomous cone snail that may enable scientists to more effectively dev... J. Michael McIntosh. Discovery of the new cone snail toxin will be published Friday, Aug. 25 in The Journal of Biological Chemistry by a team led by McIn...

Venomous cone snail biologist named to Institute of Medicine

.... The drug was isolated from the fish-hunting cone snail Conus magus, or magician's cone, which is only 1.5 inches long and thus too small to kill people it stings. Prialt, sold by Ireland's Elan Corp., is pumped into fluid surrounding the spinal cord to treat chronic, intractable pain suffered b...

A new target for painkillers

...y of Sciences. The study in rats found that cone snail toxins named RgIA and Vc1.1 can treat nerve hypers...rmed The toxins in the study come from two cone snail species that eat worms, unlike relatives that eat fish or snails and occasionally deliver a fatal st...

This party doesn't start until the hosts arrive

...ed this. "We saw a lot of genetic variation among snail populations in Japan but the North American snails...nd could only establish in North America after the snail hosts arrived," adds Mark Torchin, of the Smithsonian Tropical Research Institute. "This is because...

'Home run' study on spread of disease published

...ological invasions. He explained that the imported snail has wiped out the native snails, changing the ecos...ara. "We saw a lot of genetic variation among snail populations in Japan but the North American snails are genetically most similar to those from northe...

How many genes does it take to learn? Lessons from sea slugs

.... -- Scientists analyzing the genomics of a marine snail have gotten an unprecedented look at brain mechanisms, discovering that the neural processes in even a simple sea creature are far from sluggish. At any given time within just a single brain cell of sea slug known as Aplysia, more than 10,000 genes...

Antarctic marine explorers reveal first biological changes after collapse of polar ice shelves

...ally new sea anemone, co-existing on the back of a snail their symbiotic relationship providing locomotion for one and protection for the other. Extensive analyses will be conducted to prove whether or not candidate specimens are in fact new species. Confirmed new species will be logged in the Census o...

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(Date:4/22/2014)... 2014 Scientists from the Florida campus of The ... that plays a critical but previously unknown role in ... showed a novel role for a protein known as ... eLife , a publisher supported by the Howard ... Wellcome Trust. , "This is a critical building block ...
(Date:4/22/2014)... International Science Consortium Ltd.,s nanotechnology expert will present a ... hazard assessment" at the 7th International Nanotoxicology Congress ... Turkey. , Dr. Monita Sharma will outline a ... National Academy of Sciences, " Toxicity Testing in the ... recommends use of non-animal methods involving human cells and ...
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