Anemone wars: clone armies deploy scouts, attack tidally.The first description of clashing armies of sea anemones has revealed unsuspected military tactics. "Sea anemone fights are amazing," says David Ayre of the University of Wollongong History The University of Wollongong was founded in 1951 when a Division of the then New South Wales University of Technology (re-named the University of New South Wales in 1958) was established in Wollongong. in Australia. Although anemones move in slow motion, a group-living species from the shores of California, Anthopleura elegantissima, fields a sophisticated army, report Ayre and Richard Grosberg of the University of California, Davis The University of California, Davis, commonly known as UC Davis, is one of the ten campuses of the University of California, and was established as the University Farm in 1905. . Researchers some 50 years ago noticed specialized anemone anemone (ənĕm`ənē) or windflower, any of the perennial herbs, wild or cultivated, of the genus Anemone of the family Ranunculaceae (buttercup family). tentacles that inflate but aren't used for snagging food. In the 1970s, Stanford University biologist Liz Francis found that these structures, called acrorhagi, lash stinging cells onto enemy anemones. Certain individuals, which she called warriors, have many acrorhagi but a dearth of ripe gonads. Francis coaxed individual anemones, or polyps Polyps A tumor with a small flap that attaches itself to the wall of various vascular organs such as the nose, uterus and rectum. Polyps bleed easily, and if they are suspected to be cancerous they should be surgically removed. , to attach to table tennis balls set afloat in the lab. When she mixed balls carrying various genetic types, the polyps sorted themselves by clone. In the wild, hostilities break out "Hostilities Break Out" is an episode of the series Ōban Star-Racers. The 'Earth Team' arrives on Alwas, site of the preliminaries and discovers that Eva, who calls herself 'Molly', has followed them. at borders between dense colonies, each made up of genetically identical anemones. Scientists find it almost impossible to study A. elegantissima patches in the wild, says Grosberg, because at low tide these anemones sit with their tentacles pulled in, and when the water rises and the animals become active, waves block the view. However, he and Ayre moved a large boulder with two adjacent anemone clones into the lab. Regular flushing of the aquarium built around the boulder revealed that anemone hostilities follow the tides. As water rushed in, warrior polyps located several rows back from the border inflated their acrorhagi, tripled their body length, and began bending around as if looking for Looking for In the context of general equities, this describing a buy interest in which a dealer is asked to offer stock, often involving a capital commitment. Antithesis of in touch with. trouble. They could reach far enough to strike an alien polyp polyp, in medicine, a benign tumor occurring in areas lined with mucous membrane such as the nose, gastrointestinal tract (especially the colon), and the uterus. Some polyps are pedunculated tumors, i.e. that had crept close to the patch. "We'd had no idea they could do this," says Ayre. Another surprise came from the small polyps along the outermost out·er·most adj. Most distant from the center or inside; outmost. outermost Adjective furthest from the centre or middle Adj. 1. edge. A no-clone zone as wide as several polyps lies between hostile patches, and small polyps now and then creep into that zone. Typically, they get stung a few times and then retreat to their home colonies. One polyp, nicknamed Stumpy, took such a drubbing that when it retreated to its home patch, it was attacked by its own team. Grosberg says that it must have picked up so many alien-clone stinging cells that its clone mates didn't recognize it. Grosberg says that the incident suggests that these small polyps work as scouts. The idea that information passes from the border to polyps located farther back in the patch sounds plausible, comments Sam Beshers of the University of Illinois at Urbana-Champaign Early years: 1867-1880 The Morrill Act of 1862 granted each state in the United States a portion of land on which to establish a major public state university, one which could teach agriculture, mechanic arts, and military training, "without excluding other scientific . "They could be playing 'telephone' with some molecules they've picked up," he says. Studying anemone clones could shed light on the interplay of environment and genetics in the division of labor, Grosberg argues. For example, lab experiments found that repeated contact with alien clones encourages the growth of acrorhagi. His and Ayre's studies are described in a report entitled "Behind anemone lines" in an upcoming Animal Behaviour. |
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