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Tag: "mollusks" at biology news

Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

...cal Bulletin. __IMAGE_2 Nudibranchs—a group of mollusks lacking outer shells—have developed sophisticated chemical defense mechanisms, which is particularly important because promising industrial and medicinal products have been isolated from known species. New species may provide cures for diseases that...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

The unusual mollusks of oceanic cold seeps--strange clams, mussels and ...record is a full epoch earlier than that of marine mollusks in general, according to Steffen Kiel and Crispin Little of the University of Leeds. These findings...

Scientist's persistence sheds light on marine science riddle

... www.data.acnatsci.org/wasp ) documents species of mollusks in the Western Atlantic, from Greenland to Antarctica. Scientists have suggested several explanations for the evolution of body size in animals isolated on islands: reduced area, fewer predators, less competition, and resource limitation. "Only res...

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

...ings are especially important for scientists using mollusks in experimental systems, according to Edgar Walters, Ph.D., a professor of integrative biology and pharmacology at the University of Texas Medical School at Houston, who was not involved in the research. "Few animals other than Aplysia allow scie...

Mussels evolve quickly to defend against invasive crabs

... Freeman. "We wanted to know, how is it that these mollusks can recognize a crab that is historically not present in North America?" Freeman exposed mussels native to the northern ?above mid-coast Maine ?and southern New England to both Carcinus and the Hemigrapsus. Both populations thickened their shells w...

A dichotomy in migration patterns found for sea turtles in east Atlantic

...nt-were larger, and they feed on thearthropods and mollusks that are normally abundant in this food-richecosystem. In contrast, adults foraging in the open ocean are smaller, havea more limited capacity for diving, and most likely feed on a somewhatdifferent set of prey that includes small, floating plants an...

Study finds evolution doesn't always favor bigger animals

...regulate their internal body temperatures, such as mollusks to turtles, also follow this rule. "It is a bit of a puzzle why Bergmann's Rule holds in cold-blooded animals like ostracodes," said Hunt. Hunt and Roy found that as ocean temperatures declined by some 10 degrees centigrade, from 40 million years...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

...t have already begun to bury the delicate mats and mollusks established within the underwater environment. He added that there may be a sense of urgency to investigate the unusual seafloor ecology below the Larsen shelf because of the likelihood of increased sediment deposition. In addition, he suggests that...

Nature provides inspiration for important new adhesive

...cles. "I was amazed at the ability of these small mollusks to attach themselves so strongly to rocks," said Li, who is an expert in wood chemistry and adhesives in the OSU Department of Wood Science and Engineering. "Thinking about it, I didn't know of any other type of adhesive that could work this well in ...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

... which release toxins in the water that can poison mollusks and fish. Excessively large blooms can also overwhelm a marine ecosystem by depleting oxygen in the water. Scientists suspect that many harmful blooms are artificially fueled by fertilizer runoff from farms, which dump tons of excess nitrogen into ri...

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