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Topic: Crab

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Crab Nebula

horseshoe crab

crab spider

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blue crabs

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	Blue Crab Facts
		The blue crab is a important bottom-dwelling predator and a member of the swimming crab family, Portunidae.
		The blue crab is one of the most important species harvested in the Bay, and has the highest value of any commercial fishery and supports a recreational fishery of significant, but undetermined, value.
		The crab pot is the most widely used gear throughout the Bay and harvests approximately 60% of hard crabs landed in Maryland.
	www.dnr.state.md.us /fisheries/education/crab/bluecrabfacts.html (1566 words)

	Crab (animal) - MSN Encarta
		Crabs are divided into two groups: true crabs (about 4500 species) and hermit crabs and their allies (about 1400 species).
		Crabs are related to lobsters and shrimps, but their evolutionary development has enabled them to walk or run sideways and to burrow as well as swim.
		Fiddler crabs belong to the genus Uca, sand crabs to the genera Emerita and Blepharipoda, and hermit crabs to the genus Pagurus.
	encarta.msn.com /encyclopedia_761564259/Crab_(animal).html (825 words)

	Crab - Wikipedia, the free encyclopedia
		Crabs are a very diverse group, mostly found in saltwater, but with some groups living in freshwater or on land.
		In females, these are on the third pereiopod, or nearby on the sternum in higher crabs; in males, the gonopores are at the base of the fifth pereiopods or, in higher crabs, on the sternum nearby.
		The crab louse is the origin of the slang term "crabs" for an infestation of pubic lice.
	en.wikipedia.org /wiki/Crab (568 words)

	Fiddler Crab Reference List
		Flux of crab larvae in a mangrove creek in the Gulf of Nicoya, Costa Rica.
		In vitro excystment of the metacercariae of Gynaecotyla adunca and Probolocoryphe uca (Microphallidae) from the fiddler crab, Uca pugilator.
		In vitro synthesis of vitellin by the ovary of the fiddler crab, Uca pugilator.
	www.fiddlercrab.info /uca_references.html (10877 words)

	Pacific Seafood Group
		Blue king crab, which can be distinguished from red king crab by the more pronounced dark coloring on the tip of their legs, are almost as large as red king crab.
		Brown, or "golden," king crab is noticeably smaller and can easily be distinguished by its uniform red/orange color on their legs (the underside of red and blue king crab legs are a creamy white).
		Crab are caught and processed on board catcher-processor boats or delivered live to shore-based or floating processors.
	www.pacseafood.com /products/king_crab.html (926 words)

	Ocean Crabs by Jim Cornish
		Harmless to humans and not particularly aggressive in general, the spider crab's main defense against predators is camouflage: the hook-like hairs on the crab's shell (carapace) hold algae and other small debris in place.
		The world's largest population of horseshoe crabs scrambles from the ocean to their spawning grounds on the Delaware Bay from the end of May until the end of June.
		Fiddler crabs are small, semi-terrestrial crabs of the genus Uca that are characterized by extreme cheliped asymmetry in males.
	www.cdli.ca /CITE/oceancrabs.htm (790 words)

	Ghost crab - Wikipedia, the free encyclopedia
		These crabs are called ghosts because of their ability to disappear from sight almost instantly, scuttling at speeds up to 10 miles per hour, while making sharp directional changes.
		At dusk, these crabs will sprint to the ocean in order to obtain oxygen from the water which washes over their gills, and in June, females will release their eggs into the ocean.
		The common ghost crab or smooth-handed ghost crab (Ocypode cordimana) is found on the northern Australian coast from the Kimberley region of Western Australia to New South Wales, being particularly common in New South Wales.
	en.wikipedia.org /wiki/Ghost_crab (306 words)

	Offshore / Inshore Fisheries Development & Technologies: Species - Atlantic Snow Crab
		Snow crabs are common in the estuary and the Gulf of St. Lawrence, around Cape Breton Island and in the bays of Newfoundland, from Fortune Bay to White Bay.
		Snow crabs live most commonly on muddy or sand-mud bottoms at temperatures ranging from -0.5 to 4.5°C. In the Gulf of St. Lawrence, they are usually found at depths of 70 to 140 m, while in Cape Breton the depth varies from 45 to 245 m, and 170 to 380 m off Newfoundland.
		Crab traps are frames with iron rods and are covered with polyethylene rope webbing, and may be either cone-shaped or rectangular.
	www.mi.mun.ca /mi-net/fishdeve/crab.htm (1666 words)

	Dungeness Crab of California and Its Close Relatives
		These crabs are all of the family Cancridae and the genus Cancer, meaning hard shell, and are characterized by a carapace that is broadly oval and sawtoothed on the front side.
		During the period when the shell is cast off, the crab is known as a "soft" crab and it is during this interval of a few days that the crab undergoes a period of rapid growth before the new shell becomes calcified and fixes the size of the crab until the next molt.
		The legal measurement for crabs is defined as the shortest distance through the body from the edge of the shell to the edge of the shell directly from front of points (lateral spines).
	www.dfg.ca.gov /mrd/dungeness_crab.html (1959 words)

	Crab Pot Crabbing
		The Maryland crab pot is an enclosed framework of wire with four openings where the crabs enter to eat the bait.
		If the crab is trapped and cannot escape from your equipment, then the device is referred to as a crab pot, which is similar to what commercial crabbers use.
		Crabs are removed from the pot by disengaging the wire hook at the top; this allows an opening along one side.
	www.vims.edu /adv/ed/crab/pot.html (363 words)

	Blue Crab
		The blue crab is a 10-legged crustacean, related to the shrimp, lobster and crayfish.
		A female carrying a cluster of orange eggs beneath her apron is known as a ‘sponge crab' and is nearly ready to spawn.
		The average lifespan of a crab is up to three years, however the maximum age may be as long as five to eight years.
	www.chesapeakebay.net /blue_crab.htm (1206 words)

	Ocean Crabs by Jim Cornish
		Harmless to humans and not particularly aggressive in general, the spider crab's main defense against predators is camouflage: the hook-like hairs on the crab's shell (carapace) hold algae and other small debris in place.
		The world's largest population of horseshoe crabs scrambles from the ocean to their spawning grounds on the Delaware Bay from the end of May until the end of June.
		Fiddler crabs are small, semi-terrestrial crabs of the genus Uca that are characterized by extreme cheliped asymmetry in males.
	www.stemnet.nf.ca /CITE/oceancrabs.htm (790 words)

	crab on Encyclopedia.com (Site not responding. Last check: )
		The blue crab of the Atlantic coast of the United States is a swimming crab that is much used for food.
		The sluggish, long-legged spider crabs are often disguised by the algae, barnacles, and sea anemones that attach themselves to the carapace.
		The horseshoe crab, which also is called by the name king crab, is not a crustacean, and the hermit crab, although a crustacean, is not a true crab.
	www.encyclopedia.com /html/c1/crab.asp (761 words)

	crab - Search Results - MSN Encarta (Site not responding. Last check: )
		Crab (animal), common name for any of a group of crustaceans characterized by a reduced abdomen and an enlarged and broadened anterior portion of...
		Cancer (astrology), the fourth sign of the zodiac, symbolized by a crab.
		Cancer (astronomy) (Latin for “crab”), constellation whose name is derived from a Greek myth about a crab who fought the Greek hero Heracles...
	encarta.msn.com /encnet/refpages/search.aspx?q=crab (205 words)

	Good Bug Bad Bug: Crab Spiders (Site not responding. Last check: )
		Although some crab spiders have an angular abdomen with a hump bulging out of both sides, the species I’ve seen most often are creamy white with a smooth round to oblong abdomen.
		Among the crab spiders that cannot change color, if the spider is moved to another color flower or location, it will quickly leave in search of another flower that matches its hue.
		Crab spider populations are kept under control by the spider’s many predators, including birds, frogs, ants, beetles, centipedes, parasitic wasps and other spiders.
	www.bmi.net /roseguy/gbcrab.html (523 words)

	Sea and Sky: Crustaceans Page 1
		Because the crab's abdomen is soft and vulnerable, its uses discarded snail shells to protect itself.
		The Purple Shore Crab is commonly found on the open rocky seashores of the pacific coast of North America.
		This crab is usually found within the stinging tentacles of a number of anemone species where it uses its large well-developed claws to keep clownfishes from stealing its home.
	www.seasky.org /reeflife/sea2e.html (459 words)

	New Jersey Scuba Diver - Marine Biology - Crustaceans: Crabs
		Recreational crabbing is particularly important in the Upper Barnegat, Little Egg Harbor and Maurice River estuaries, comprising 65 to 86 percent of the total recreational harvest in these areas.
		Crabs are abundant all along the Jersey coast, from the Hackensack River to Delaware Bay.
		Mud Crabs are often abundant in sponge colonies, among bushy bryzoans and hydroids on pilings, and intertidally under rocks or other debris on protected shores.
	www.njscuba.net /biology/sw_crabs.html (1293 words)

	Legend of the Five Rings -- Broken Blades (Site not responding. Last check: )
		The Crab are still adjusting to the return of the Great Bear, Hida Kisada, who has crossed over from the spirit world to become mortal once more.
		The Crab are currently very strong, holding alliances with the Crane and Unicorn while having open conflict with no faction in the Empire.
		The Crab are aware of a growing conflict in the Shadowlands.
	www.legendofthefiverings.com /factions/crab.html (180 words)

	Horseshoe Crab
		Horseshoe crabs are important because their eggs provide food for migrating shorebirds, which stop along the Delaware Bay shores each spring to rest and feed on the protein-rich eggs before resuming their flight north to breeding and nesting grounds.
		A clotting factor in the crab's blood, which can be removed without harming the crab, is used to detect bacteria in human blood, in intravenous drugs, and even in prosthetics such as heart valves prior to implantation.
		The horseshoe crab's decline is attributed to factors ranging from the loss of sandy beaches the animal needs to lay its eggs, to overharvesting, particularly of females, for use as eel and conch bait.
	www.ocean.udel.edu /kiosk/hshoecrab.html (596 words)

	Crab Spiders
		The archetypal ambush hunter of the arachnids is undoubtedly the crab spider.
		Crab spiders, on the other hand, are very slow moving and therefore ineffectual hunters.
		Crab spiders are easy to identify since their first two pairs of legs are much longer than the others.
	home.att.net /~larvalbugrex/crab.html (569 words)

	Alaska King Crabs: Wildlife Notebook Series - Alaska Department of Fish and Game
		King crabs have “tails,” or abdomens, that are distinctive, being fan-shaped and tucked underneath the rear of the shell.
		King crabs are eaten by a wide variety of organisms including but not limited to fishes (Pacific cod, sculpins, halibut, yellowfin sole), octopuses, king crabs (they can be cannibalistic), sea otters, and several new species of nemertean worms, which have been found to eat king crab embryos.
		A near peak harvest of red king crabs occurred in the 1980/81 season, but three years later the fishery crashed, as harvests were down sixty-fold, and the four top historical producing areas were closed completely to red king crab fishing for the first time.
	www.adfg.state.ak.us /pubs/notebook/shellfsh/kingcrab.php (1333 words)

	Alaskan king crab - Hutchinson encyclopedia article about Alaskan king crab (Site not responding. Last check: )
		The king crab is an ancient life form, almost identical to fossils from the Triassic period about 225 million years ago.
		It is caught for food in large numbers off the eastern coast of North America from Florida to Nova Scotia, and off the eastern coast of Asia.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /Alaskan+king+crab (215 words)

	Horseshoe crab biology
		The prosoma is the front, semicircular part of the horseshoe crab and combines the head and thorax under a hard shell or exoskeleton.
		The horseshoe crab lacks jaws to chew its food, so as it moves, the gnathobases work to tear and shred the worm or clam.
		A horseshoe crab is virtually a "walking hotel," with any number of creatures living attached to its shell — barnacles, blue mussels, slipper shells, bryozoans, sponges, flatworms, diatoms, fungi, and bacteria.
	www.ocean.udel.edu /horseshoecrab/History/biology.html (708 words)

	Blue Crab
		Aging crabs is difficult, as they lose in the molting process many of the characteristics that scientists generally use to define age.
		Blue crab abundance is highly variable and appears to fluctuate cyclically, with years of peak abundance usually followed by years of declining abundance, before the trend reverses.
		The annual Blue crab catch in the Texas inshore shrimp fishery is estimated at 85,000,000 crabs; that in the Louisiana shrimp fishery is estimated at 20,500,000 pounds.
	blueocean.org /seafood/species/6.html (4856 words)

	APOD Search Results for "crab"
		Like its cousin in astrophysical waters, the Crab Nebula, IC 443 is known to harbor a neutron star, the collapsed core of the massive star that exploded over 30,000 years ago.
		In fact, the Crab is now known to be a supernova remnant, an expanding cloud of debris from the explosion of a massive star.
		Crab pulsars - bizarre, spinning stellar corpses known to be neutron stars - are the two brightest gamma-ray sources.
	antwrp.gsfc.nasa.gov /cgi-bin/apod/apod_search?crab (5833 words)

	WDFW - Aquatic Nuisance Species: European Green Crab (Site not responding. Last check: )
		The European green crab is native to the Atlantic coast of Europe and northern Africa, from Norway and the British Isles south to Mauritania.
		Dungeness crabs spend part of their juvenile life in the intertidal zone, and may therefore be at risk from European green crab predation.
		In 2002 the number of crabs caught had increased but, no new recruits were found and there was a drop in the number of older crabs, suggesting that the original 1998-99 year classes were dying out.
	wdfw.wa.gov /fish/ans/greencrab.htm (4573 words)

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