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Topic: Basking Shark


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  Basking Shark - Wikipedia, the free encyclopedia
Like other large sharks, Basking Sharks are at risk of extinction due to a combination of low resilience and overfishing through mankind's increasing demands for the sharks' flesh and organs: the flesh for food and fishmeal, the fins for shark fin soup, the hide for leather, and the liver for its oil.
Although Basking Sharks are often sighted close to land and in enclosed bays during warmer months, they are highly migratory and seem to disappear entirely during the fall and winter; during this time they remain at the bottom in deep water where they may hibernate and lose their gill rakers: this hypothesis is however disputed.
Basking Sharks are ovoviviparous: the developing embryos first rely on a yolk sac, and as there is no placental connection, they later rely on unfertilized ova produced by the mother (a behaviour known as oophagy).
en.wikipedia.org /wiki/Basking_Shark   (911 words)

  
 Shark - Wikipedia, the free encyclopedia
Shark eyes are similar to the eyes of other vertebrates, including similar lenses, corneas and retinas, though their eyesight is well adapted to their marine environment with the help of a tissue called tapetum lucidum.
Sharks include everything from the hand-sized Pygmy Shark, a deep sea species, to the Whale Shark, the largest fish (although sharks are not closely related to bony fish) which is known to grow to a maximum length of approximately 15 metres (49 feet) and which, like the great whales, feeds only on plankton.
Sharks are often killed for shark fin soup, in which many sharks are hunted for their fins, which are cut off with a hot metal blade before the live animal is tossed back into the water.
en.wikipedia.org /wiki/Shark   (3661 words)

  
 Florida Museum of Natural History Ichthyology Department   (Site not responding. Last check: 2007-10-13)
The basking shark is typically seen swimming slowly at the surface, mouth agape in open water near shore.
Basking sharks are often seen traveling in pairs and in larger schools of up to a 100 or more.
Basking sharks are not considered dangerous to the passive observer and are generally tolerant of divers and boats.
www.flmnh.ufl.edu /fish/Gallery/Descript/baskingshark/baskingshark.html   (1888 words)

  
 Basking Shark   (Site not responding. Last check: 2007-10-13)
The basking shark is recognized by its large size, a conical snout, a subterminal mouth and enormous gill slits.
When basking shark (Cetorhinus maximus) fin cartilage was extracted for 41 days in 1 M guanidine solution and tested for anti-angiogenic activity against V2 carcinoma in the rabbit cornea, the vascular growth of the treated animals was 25% that of the control.
The distribution and the times of the main catches of the basking shark, C. maximus (Gunnerus), in the commercial fishery off the coast of Norway during the seasons of 1971, 1972 and 1973 are given and analyzed.
www.angelfire.com /hi2/haaitje/kindsofsharks/baskingshark.html   (1849 words)

  
 Basking Shark
The basking shark's most important characteristics are its long gill slits which almost encircle the head and its pointed snout.
Basking sharks can be found on the northern hemisphere off the coast of China, Korea and around Japan, on the East coast of the U.S., from Newfoundland down to Florida, around Great Britain and Norway, but also in the Mediterranean.
They have a habit of swimming directly underneath the surface of the water ("basking" means to sun oneself or bask in the sun) and are frequently observed swimming in a row so that their dorsal fins and the upper lobes of their caudal fins penetrate the water.
www.worldshark.com /species/basking/basking.html   (729 words)

  
 THE BASKING SHARK IN UK WATERS
Basking sharks are believed to have been the inspiration for many "sea monster" tales, particularly where a number were spotted together basking at the surface, showing a multitude of noses, tails and fins.
Equally, many stranded basking sharks in varying stages of decomposition were misidentified as monsters, including the famous "Stronsay monster" found in the Orkney Isles, and the "Broad headed gazer" discovered in Cornwall.
The basking shark, in common with many other elasmobranchs, is a slow maturing, low fecundity animal ill equipped in reproductive terms to deal with concentrated fisheries effort.
www.pacfish.org /sharkcon/documents/speedie.html   (1515 words)

  
 Basking shark - Cetorhinus maximus: More Information - ARKive
The basking shark is found throughout the world mainly in cool and temperate waters (5), although some sharks have recently been tagged, and found in tropical waters (12), although it was probably never very abundant (1).
These sharks are found at the surface of coastal waters during the summer to feed on seasonally abundant copepods which bloom in frontal areas during spring and summer, but it is thought they migrate further offshore or to deeper waters during winter (7).
Basking sharks are usually solitary, although pairs and groups of up to 100 individuals have been seen (2).
www.arkive.org /species/GES/fish/Cetorhinus_maximus/more_info.html   (1048 words)

  
 BASKING SHARK - Zoom Sharks
Basking sharks have hundreds of teeth (each having a single cusp, curving backwards) but they are tiny and are of little use.
Basking sharks are filter feeders that sieve small animals from the water.
The number of basking sharks is unknown, but it may be decreasing since the basking shark is hunted for its meat, fins and oil.
www.enchantedlearning.com /subjects/sharks/species/Baskingshark.shtml   (615 words)

  
 Jeffreys Ledge: Basking Shark
Basking sharks on the Ledge: Basking sharks are seen most often on the Ledge in late summer.
Distinctive Characteristics: Basking sharks are commonly noted from a distance by their big, floppy triangular dorsal fin; upon closer inspection, the dorsal tip of the tail can also be seen.
The slow reproduction of basking sharks makes them very prone to over-fishing, as it would be easy for reproduction to fail to keep up to the level of a fishery take.
www.jeffreysledge.org /cmsharktext.htm   (545 words)

  
 Basking shark
It is chiefly during the warm half of the year that basking sharks are encountered off the northeastern United States and in the northern part of their range in the opposite side of the Atlantic.
And the only report that might be based on the basking shark on the offshore fishing banks that we have received from fishermen has been of a number of unusually large sharks of some sort, seen by Capt. Henry Klimm on the southeast part of Georges Bank during late June and early July 1947.
Basking sharks are still the object of intermittent small vessel fisheries off the coast of Iceland, around the Orkneys, off western Ireland, and off southern Norway; also off Ecuador and Peru in the Pacific.
octopus.gma.org /fogm/Cetorhinus_maximus.htm   (2286 words)

  
 Basking shark
Since the basking sharks periodically sheds the gillrakers during the colder months and because the amount of plankton varies with the season the question arise as to how the shark feeds during the winter.
Another explanation is that the shark changes the diet and feeds in deeper water or on the bottom until the gillrakers grow back, and still another one supports an overall reduced activity while the shark relies on its stored oil (in the liver) for energy.
The basking shark is believed to have a long gestation period, three and a half years, and to give birth to relatively few young.
www.sharkology.com /species.html   (656 words)

  
 Biology of the Basking Shark
The Basking Shark is the largest of the lamnoids and a true titan among sharks.
Basking Sharks have tiny teeth that do not seem to function in feeding as an adult, but they may be useful before birth as this species seems to feed on unfertilized eggs in utero.
Basking Sharks resemble and are closely related to the mackerel sharks (family Lamnidae).
www.elasmo-research.org /education/shark_profiles/cetorhinus.htm   (2442 words)

  
 Basking Shark
The basking shark is usually grayish-brown in colour and often seems to have a mottled appearance.
Basking sharks are a migrating species and are believed to overwinter in deep waters.
In Canadian waters the basking shark is often seen during the summer and fall (May to September) near and around the coastline.
new-brunswick.net /new-brunswick/sharks/species/basking.html   (590 words)

  
 The Pelagic Shark Research Foundation - The Sharks of the Monterey Bay - Pelagic Sharks
The basking shark is recognized by its huge size, conical snout, sub-terminal mouth, extremely large gill slits, dark bristle-like gill rakers inside the gills (present most of the year), strong caudal keels on the caudal peduncle, and a lunate tail.
When first seen in the water, the basking shark's large size has sometimes caused it to be mistakenly identified as a great white shark (Carcharodon carcharias) but this gentle giant is a planktivore.
Basking sharks are highly elusive and poorly understood creature whose movements and migrations are a complete mystery.
www.pelagic.org /montereybay/pelagic/baskingshark.html   (1212 words)

  
 basking shark on Encyclopedia.com   (Site not responding. Last check: 2007-10-13)
Distribution and apparent abundance of the basking shark, Cetorhinus maximus, off the central and southern California coast, 1962-85.
A 9-meter Cetorhinus maximus known as basking shark, and weighing 2.5 tons, is pictured in Chalkidiki, 01 February 2006.
Greek fishermen found the shark tangled in their net and they transported it to a fish market where it was put on display.
www.encyclopedia.com /html/b1/baskings.asp   (497 words)

  
 Basking Shark   (Site not responding. Last check: 2007-10-13)
Basking sharks are the second-largest fish in the world; the whale shark is the largest.
The young are born live, at about 1.5-2m in length, and newborn sharks of this size are seen from time to time, although the average size of sharks recorded in recent years has been around five metres.
Unlike the whale shark, which can rely on a supply of plankton all year in warmer waters, the basking shark depends on the spring, summer and early autumn bursts of plankton.
www.coverack.org.uk /pages/baskingshark.htm   (526 words)

  
 Basking Shark
The basking shark is usually grayish-brown in colour and often seems to have a mottled appearence.
The basking shark is a pelagic animal, occurring in both coastal and oceanic waters from 200 to 2000 m deep, but often straying inshore.
The basking shark is often killed by boats and entangled in nets in the same manner as whales, and is considered endangered in some parts of the world.
www.marinebiodiversity.ca /shark/english/basking.htm   (732 words)

  
 Basking Shark Excites Beach Crowd   (Site not responding. Last check: 2007-10-13)
They belonged to a lone basking shark, which seemed to be doing laps only about 25 yards out yesterday, prompting park officials to take the rare step of temporarily closing the beach for swimming.
The basking shark sightings began on June 10, when six were spotted swimming off Georgica Pond in the Hamptons.
The shark sighting wasn't scary for Kaitlin Shore, 9, and her sister Kristen, 7, who were at the beach to celebrate Father's Day with their dad Tim and family friend George Ghossn.
www.flmnh.ufl.edu /fish/sharks/innews/baskingbeach2004.html   (470 words)

  
 Cetorhinidae: Basking Shark
Despite its tiny teeth and placid grazing habits, the enormous Basking Shark (Cetorhinus maximus) is clearly closely related to the large-toothed, actively predaceous mackerel sharks of the family Lamnidae - which includes the Great White and its closest relatives.
Based on morphological evidence, shark systematist Leonard Compagno (1990) proposed that the Basking Shark is the primitive sister taxon to the lamnids.
In their 1976 review of Basking Shark systematics, ichthyologists Stewart Springer and Perry W. Gilbert suggested that most of the differences between the various species noted by E. Siccardi (1961) may be due to allometry (changes in relative proportions associated with growth).
www.elasmo-research.org /education/shark_profiles/cetorhinidae.htm   (545 words)

  
 Boattalk.com - The Basking Shark   (Site not responding. Last check: 2007-10-13)
Gill rakers are bristly structures in the shark's mouth that trap the small organisms which the shark then swallows.
Basking Sharks can be found along the southern states of Australia from about Port Stephens on the east coast of New South Wales south and to Busselton in Western Australia.
Basking sharks eat plankton and they move along with their mouths open wide filtering as they go.
www.boattalk.com /sharks/basking.htm   (395 words)

  
 Sea-Monster or Shark: An Alleged Plesiosaur Carcass   (Site not responding. Last check: 2007-10-13)
This should not be surprising, since basking sharks are known to decompose into "pseudoplesiosaur" forms, and their carcasses have been mistaken for "sea-monsters" many times in the past.
As mentioned, some scientists believed from the start that the carcass in question was probably a shark, based on their knowledge of basking shark decay, and similar "sea serpent" carcass incidents of the past.
Basking sharks have large deposits of fat in the white muscle and liver.
paleo.cc /paluxy/plesios.htm   (6707 words)

  
 [No title]
The basking shark is also known as "sun fish" for its habit of basking in the sun at the surface of the water, and "sail fish" for its large dorsal fin which resembles a sail.
Basking sharks are migratory and may move inshore or offshore depending on the season.
Basking sharks were traditionally killed for their liver oil (used for lighting and tanning), meat for human consumption and animal feed, and skin for leather.
www.ifaw.org /ifaw/general/default.aspx?oid=13106   (887 words)

  
 Basking Sharks   (Site not responding. Last check: 2007-10-13)
Biology: The basking shark is the second largest fish in the world and can grow to over 10m in length and seven tonnes in weight.
Exploitation: Basking sharks are very vulnerable to over-exploitation in fisheries due to their late sexual maturity (18 years), low fecundity (4-5 'pups' every 3-4 years) and long lives (50 years).
All countries trading in basking shark parts will now be obliged to keep proper records of the level of trade they are involved in.
www.bornfree.org.uk /baskingsharks   (418 words)

  
 Basking Shark Cetorhinus maximus (Gunnerus, 1765)
Basking sharks were observed outside Whaler's Cove, Point Lobos CA, USA.
Slideshow of 2.92 m TL male juvenile basking shark caught in Porto Moniz (North-West coast of Madeira), on 29 Jan 2000.
Tim Thomas on basking shark fishery in Monterey Bay.
homepage.mac.com /mollet/Cm/Cm_Fishery.html   (417 words)

  
 The Basking Shark   (Site not responding. Last check: 2007-10-13)
The Basking Shark is the sole member of its family, Cetorhinidae, and its species, Cetorhinus.
These sharks are probably ovoviviparous, i.e., the eggs hatch in the uterus and the pups are born live.
The Basking Shark '...is found in subpolar and temperate seas throughout the world, occasionally straying into warmer seas in winter.
www.skin-diver.com /departments/encounters/TheBaskingShark.asp?theID=270   (571 words)

  
 Basking Shark, Cetorhinus maximus
The Basking Shark is recognised by its large size, five long gill slits, two dissimilar sized dorsal fins, its lunate caudal fin and the single keel on each side of the caudal peduncle.
Basking Sharks swim with their huge mouths open and use the brush-like gill rakers to strain food from the water.
The underwater images show a Basking Shark off Peel, on the west coast of the Isle of Man. These images were taken while snorkeling, by K. Watterson, Chairperson of the Basking Shark Society.
www.amonline.net.au /fishes/fishfacts/fish/cmaximus.htm   (223 words)

  
 Basking Shark Proposal
The basking shark has become rare in areas where the species was once common.
The basking shark is caught primarily for its fins, which are used in the increasingly popular shark fin soup.
In China and Japan, basking sharks are also killed for their livers, which are used in aphrodisiac preparations, health supplements, and cosmetics.
www.hsus.org /wildlife/issues_facing_wildlife/wildlife_trade/cites_in_santiago_54_decisions_that_will_affect_the_international_wildlife_trade/species_proposals_at_cites/basking_shark_proposal.html   (367 words)

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