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Tag: "clams" at biology news

Deep in the ocean, a clam that acts like a plant

... vents deep in the ocean live communities of giant clams with no gut and no functional digestive system, de...," Eisen added. If you were thinking that giant clams sound tasty, think again. The hydrogen sulfide gives them a strong smell of rotting eggs. ...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

...nose rays also may inhibit recovery of oysters and clams from the effects of overexploitation, disease, habitat destruction, and pollution, which already have depressed these species," says Peterson, noting shellfish declines in areas occupied by cownose rays and examples of stable or growing shellfish pop...

Extraordinary life found around deep-sea gas seeps

...isting of live and dead shells of various types of clams and mussels. These were fringed with stands of another type of deep-sea tube worm that is also gutless and relies on symbiotic bacteria for its nutrition. Corals and, at two of the sites, numerous sponges, were also observed. 'We've collected samp...

RNA found in the cellular centrosome of surf clams

...ts use locally abundant marine organisms like surf clams and their eggs as research models. Clam eggs are modeled as simple versions of human cells, and biologists who study cell division value them for several reasons, according to Palazzo. The eggs develop fast, entering the process of cell division less...

Exxon Valdez oil found in tidal feeding grounds of ducks, sea otters

... sea otter ?digging three pits a day searching for clams and other prey ?would probably come into contact with Exxon Valdez oil at least once every two months. However, sea otters dig thousands of pits a year, and Short suspects they actually could be encountering oil far more often than estimated. ...

Paleontologists learn how not to become a fossil

...tituting a big fraction of animal diversity." Some clams are tiny while others are giants. They pursue life...aptured." Surprisingly, they found that burrowing clams living within sediments were no more likely to become fossils than similarly sized varieties that li...

There's something fishy about human brain evolution

...heir moms were dining on shoreline delicacies like clams and catfish. "The shores gave us food security and higher nutrient density. My hypothesis is that to permit the brain to start to increase in size, the fittest early humans were those with the fattest infants," says Dr. Cunnane, author of the book S...

New genetic test can detect clam disease

... significant impact on a local economy by killing clams and devastating shellfish harvests and commercial ...nd spread to nearby clam beds, killing nine of ten clams in many of the beds. The disease spreads from clam to clam, infecting the clam by secreting a thick ...

Prenatal exposure to marine toxin causes lasting damage

...amples of affected marine animals, including razor clams and Dungeness crabs. Fisheries are closed when domoic acid levels reach 20 parts per million (ppm) in the animals' tissues, the level at which the FDA deems the toxin unsafe for human consumption. Earlier studies in animals have focused on lethal a...

Gifts from the sea

...vision and the proteins associated with it. Female clams are fertile from May to July, and millions of eggs...on biology in action. MBL scientists studying surf clams have made discoveries that may be critical to understanding diseases such as cancer; progeria, a dis...

Mutation in clams protects against paralytic shellfish poisoning but raises human health risk

Just like people, clams can be affected by the toxins that cause paralytic..., but scientists have now identified a mutation in clams that gives some protection. PSP toxins interfere with nerve function, and the mutation, which change...

Survey finds silver contamination in North Pacific waters

...such high levels in the 1970s and early 1980s that clams stopped reproducing and some species of invertebrates disappeared from mudflats, he said. At that time, silver concentrations in the bay were 100 times higher than the levels Ranville and Flegal found in the open ocean. With stricter pollution contro...

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