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sea urchin
sea urchin
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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sea ur·chin
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n.
a marine echinoderm that has a spherical or flattened shell covered in mobile spines, with a mouth on the underside and calcareous jaws. Several families and genera and numerous species include the
Atlantic purple sea urchin (Arbacia punctulata, family Arbaciidae).
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Sea urchins and humans share substantially more genes than earlier believed
News Wire article from: The Hindustan Times; 11/10/2006; 700+ words
; ...acquired immunity systems, the sea urchin has some of the genes of the...third discovery was that the sea urchin has genes for sensory proteins...different structures in sea urchins and man. "The sea urchin reminds us of the underlying...
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Sea urchins primed for export success
Newspaper article from: Sunday Star-Times; 8/5/2001; ; 700+ words
; ...exports by enhancing sea urchins to make them...research was slow but sea urchins had been developed with...mean commercial sea urchin operators might have...rejected for export. Sea urchins were slow growing and...producing better tasting sea urchins was ...
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Red Sea Urchins Discovered to Be One of Earth's Oldest Animals.
News Wire article from: AScribe Science News Service; 11/4/2003; 700+ words
; ...light on why the red sea urchin resource was declining...in the 1960s, sea urchins were considered the...we believe oldest red sea urchins up to 19 centimeters...tagging of individual sea urchins and injection with tetracycline...incorporated into the sea ...
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Trap catch of green sea urchins Strongylocentrotus droebachiensis in kelp beds and barren grounds on the Norwegian coast.(Abstract)
Magazine article from: Journal of Shellfish Research; 12/1/2008; ; 700+ words
; ...diving to harvest green sea urchins (Strongylocentrotus...showed that starved sea urchins responded on tree different...fish (saithe), sea urchin fodder, and lamina...effective fishing method for sea urchins. Development of fishing...fleet, into the sea ...
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Sea Urchins Could Have Implications for Fertility
Magazine article from: Sea Technology; 10/1/2004; ; 623 words
; ...common assumptions about sea urchin reproduction do not hold...some places, different sea urchin species breed at different...are rare. The purple sea urchin has been the most closely studied of the urchins and, for several years...
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ZOOLOGY SEA URCHINS CAUSE TROUBLE FOR LOBSTERMEN TEAM'S PROPOSED SOLUTION WOULD BRING PROFITS AND RESTORE NATURAL ORDER
Newspaper article from: The Boston Globe; 5/3/1987; ; 700+ words
; ...their research, the sea urchin, resembles a 4-inch...Maine, it's the sea urchin's mouth that's causing...The spiney little urchins like to eat their way...We've been removing sea urchins from that site in order...than the surrounding urchin barrens." Harris believes...
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Effects of experimental harvest on red sea urchins (Strongylocentrotus franciscanus) in northern Washington.
Magazine article from: Fishery Bulletin; 10/1/2002; ; 700+ words
; ...Commercial harvest of red sea urchins began in Washington...distribution of sea urchin populations resulting...term management of the sea urchin fishery in Washington...Red sea urchins (Strongylocentrotus...harvested species of sea urchin on the west coast ...
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 "AAP General News (Australia)")
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SA: Dieting sea urchins could spark aquaculture industry
Newspaper article from: AAP General News (Australia); 3/30/2000; 445 words
; ...2000 SA: Dieting sea urchins could spark...the project, the sea urchins will be collected from...grains and oils. Sea urchin roe is regarded as a...large quantities of urchins. Should the project...estimated 5,000 tonnes of sea urchins could be harvested ...
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Assessing western gull predation on purple sea urchins in the rocky intertidal using optimal foraging theory.
Magazine article from: Canadian Journal of Zoology; 2/1/2007; ; 700+ words
; ...Abstract: Purple sea urchins (Strongylocentrotus...can control the urchin population and indirectly...inhabitant is the purple sea urchin (Strongylocentrotus...1998). Purple sea urchins may also prevent...intertidal purple sea urchins. Gulls...predators on ...
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Here today, gone tomorrow? Management plan for Maine sea urchins allowing recovery, expert says
Newspaper article from: Bangor Daily News Bangor, ME; 10/8/2009; ; 700+ words
; ...first day of the sea urchin dragging season...the sea life - sea urchins are plentiful...1980s, Japan's sea urchin harvest had...some of the finest urchins anywhere. When...was unregulated. Urchin landings skyrocketed...is on the state Sea Urchin ...
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Sea Urchins
Encyclopedia entry from: The Gale Encyclopedia of Science
...steep cliffs with ease. Sea urchins feed on a wide range...detritus feeders. All sea urchins have an elaborate feeding...directions and provide the urchin with an effective rasping...underside of the body. All sea urchins are dioecious —...
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sea urchins
Book article from: A Dictionary of Zoology
sea urchins See ECHINOIDEA .
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sea urchin
Book article from: The Columbia Encyclopedia, Sixth Edition
sea urchin spherical-shaped echinoderm...dig burrows in hard rock. Sea urchins feed on all kinds of plant...marine, they occur in all seas and at all depths but prefer...species of the latter, the red sea urchin ( S. franciscanus ) of the...
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urchin
Book article from: The Oxford Pocket Dictionary of Current English
...mischievous young child, esp. one who is poorly or raggedly dressed. ∎ archaic a goblin. 2. short for sea urchin . ORIGIN: Middle English hirchon , urchon ‘hedgehog,’ from Old Northern French herichon , based...
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Sea Lily
Encyclopedia entry from: The Gale Encyclopedia of Science
...a class that also includes the feather stars. Sea lilies are also related to more familiar echinoderms such as sea urchins, starfish, and sea cucumbers. Unlike these small, squat forms, however...
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