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  • notochord
  • tripartite brain and paired cranial sense organs, cranium with anterior notochord, semi-circular canal(s), 1 heart, kidneys. (palaeos.com)
  • As chordates, all craniates develop a notochord, which is primitively large (hagfishes, lampreys), but becomes transitory in most vertebrates and is replaced by elements of the vertebral column, the centra and arcualia. (factbites.com)
  • eels
  • Lampreys resemble eels in external appearance and, although not related to the true eels, are sometimes called lamprey eels. (encyclopedia.com)
  • One irony is that rivers that were once too polluted even for lampreys have been cleaned up so well that they are now havens for the spawning eels. (blogspot.com)
  • The invasion of the lamprey eels should be more than enough warning to encourage federal officials, particularly our Chicago-based president, to return the Chicago River's flow back to what God intended and prevent the next Great Lakes invader -- the Asian Carp . (blogspot.com)
  • Petromyzon
  • The parasitic sea, or Atlantic, lamprey, Petromyzon marinus, found on both sides of the Atlantic, has become well established in the Great Lakes, where it is considered a serious pest by the fishing industry. (encyclopedia.com)
  • The common or sea lamprey of America and Europe ( petromyzon marinus), which in spring ascends rivers to spawn , is considered excellent food by many, and is sold as a market fish in some localities . (biology-online.org)
  • larval
  • Adults of most members are sessile filter feeders with an expanded pharynx and, like cephalochordates and larval lampreys, with an endostyle, a mucous food trap in the pharyngeal floor that is homologous with the thyroid gland of vertebrates. (factbites.com)
  • mouth
  • All lampreys attach themselves to other fishes , as parasites , by means of the suckerlike mouth . (biology-online.org)
  • Both Jamoytius and Euphanerops display a very long series of more than twenty gill openings, and a circular structure around the mouth, which may be an annular cartilage, and thus would suggest affinities with lampreys (see Hyperoartia ). (tolweb.org)
  • They have a circular tooth mouth (cyclostomic) by which they bore the body of their victim and suck their blood. (animalsworlds.com)
  • Lampreys use their round mouth and a rasping tongue to latch on the side of a fish, penetrate the skin, and ingest its blood. (what-when-how.com)
  • eggs
  • The researchers have been looking for the primordial stem cells for sperm and eggs hidden away in the lamprey, but they are difficult to find. (scitech-news.com)
  • great lakes
  • The sea lamprey is native to the Atlantic Ocean but infiltrated the Great Lakes region in the 1920s and '30s during canal construction. (reference.com)
  • Sea Lamprey are found throughout the Great Lakes and clear, cold streams in the region. (lake-link.com)
  • Due to the leadership of the Great Lakes Fishery Commission and its partners, Fisheries and Oceans Canada and the U.S. Fish & Wildlife Service, these organizations undertake sea lamprey control on the Great Lakes. (lake-link.com)
  • From Sea Lamprey: the battle continues working together to protect our great lakes fishery. (lake-link.com)
  • fish
  • Most fish can survive a sea lamprey attack but will be left with a circular wound. (reference.com)
  • Direct Predation - Sea lampreys attach themselves to other fish and suck on their blood and body fluids. (lake-link.com)
  • Multiply that times 22,000 lamprey found in just one river and you have a lot of dead fish. (lake-link.com)
  • Lampreys do not have scales like fish, but rather have a rubber textured skin that secrets a kind of mucus that makes the animal exceptionally slippery. (reference.com)
  • Two Pacific lampreys, residents at the High Desert Museum since February, were released Thursday into the upper Umatilla River basin through a re-introduction effort to restore the population of the culturally important fish. (apgeditorial.com)
  • Jessica Stewart, associate curator of wildlife at the High Desert Museum, said the museum plans to regularly house and release lampreys, making the prehistoric fish a consistent attraction at the museum. (apgeditorial.com)
  • fish's
  • A secreted enzyme prevents the fish's blood from clotting, allowing the sea lamprey to eat for hours, days or weeks. (reference.com)
  • shortly
  • Shortly after a fertilized lamprey egg divides into several cells, the growing embryo discards millions of units of its DNA. (scitech-news.com)
  • openings
  • Also, contrary to most other "ostracoderms", they have a rather slender and laterally compressed body, with the gill openings extending behind the eyes in a slanting row, as in lampreys. (tolweb.org)
  • several
  • These specimens were donated to the University of Alaska Museum of the North, where Curator Andres Lopez was already involved with several projects involving lampreys. (uaf.edu)
  • Learn
  • He is working with undergraduate, graduate and faculty researchers across a variety of units on campus to learn more about the complex life cycles of lampreys. (uaf.edu)
  • researchers
  • The researchers were trying to deduce how the sea lamprey employs a copy-and-paste mechanism to generate diverse receptors for detecting a variety of pathogens. (scitech-news.com)
  • known
  • a technique known as the Sterile-Male-Release that reduces the success of sea lamprey spawning and trapping. (lake-link.com)
  • Not much is known about lampreys because they spend so much of their life out of sight. (uaf.edu)
  • However, since nothing is known of the internal anatomy of anaspids, there are still debates as to whether it corresponds to a blind nasohypophysial complex of lamprey type, or to an inhalent duct leading to the pharynx. (tolweb.org)
  • single
  • I am so amazed that, in all my time watching horror movies, I can't recall a single time ever seeing a lamprey used. (blogspot.com)
  • Animals
  • The alteration of the sea lamprey genome and of invertebrates that restructure their genome appears to be tightly regulated, according to Smith, yet the resulting structural changes seem almost like the DNA errors that give rise to cancers or other genomic disorders in higher animals. (scitech-news.com)
  • life
  • Arctic lampreys lead a very interesting life that shares key traits with the more familiar salmon," he said. (uaf.edu)
  • Museum
  • One of the lamprey specimens in the collections at the University of Alaska Museum of the North used in research. (uaf.edu)
  • In the next few weeks, members of the Umatilla tribe will bring another pair of Pacific lamprey to the museum. (apgeditorial.com)
  • The lampreys' presence at the museum has helped educate the public about the often misunderstood creature, Stewart said. (apgeditorial.com)
  • The two lampreys at the museum were kept in a 710-gallon aquarium at the Autzen otter exhibit. (apgeditorial.com)
  • Museum staff had to place a lid on top of the aquarium because the lampreys were capable of climbing out. (apgeditorial.com)