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  • Marys River
  • Charge is to develop a strategy for sustainable sea lamprey control on the St. Marys River that includes an integrated program of options that minimize costs and environmental impacts, while maximizing suppression of transformer production from the river over the long term. (glfc.org)
  • U.S. Fish and Wildlife Service and Department of Fisheries and Oceans Canada personnel will soon apply lampricides to sections of the St. Marys River to kill sea lamprey larvae burrowed in the stream bottom. (sooeveningnews.com)
  • larva
  • Wagner says lamprey are attracted to the scent of their own larva and repelled by the scent of their dead brethren - really repelled. (npr.org)
  • ROBINSON: So now Michael Wagner is working in this watershed of more than 400 tributaries full of lamprey larva. (npr.org)
  • Unlike hagfishes, the other extant group of jawless fishes, which exhibit direct development, all modern lampreys possess a complex life cycle which includes a long-lived freshwater larval (or ammocoete) period, followed by a true metamorphosis into a sexually-immature juvenile and then mature adult which differ dramatically in their morphology and ecology from the larva. (springer.com)
  • Chang M, Wu F, Miao D, Zhang J (2014) Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle. (springer.com)
  • Geotria
  • Bird DJ, Potter IC (1981) Proximate body composition of the larval, metamorphosing and downstream migrant stages in the life cycle of the Southern Hemisphere lamprey, Geotria australis . (springer.com)
  • eggs
  • The female lamprey lays between 30,000 to 100,000 eggs into a nest while the male simultaneously fertilizes the eggs. (usgs.gov)
  • Sea lamprey larvae hatch from eggs laid by adult lampreys in gravel nests, and drift into silty bottom areas where they burrow and live for several years. (dailytribune.com)
  • 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)
  • Fishes
  • L ampreys are eel-shaped jawless fishes (disputed if fish) that are found in freshwater lakes and streams as well as in salt water. (endangeredspeciesinternational.org)
  • Modern lampreys (Petromyzontiformes) are one of two lineages of surviving jawless fishes (agnathans), and are thus of critical importance to understanding the evolution of the vertebrates. (springer.com)
  • Sea lampreys are members of an ancient family of "jawless fishes" that were around before the time of the dinosaurs. (lake-link.com)
  • Between 50 and 80% of fishes, mostly salmonids, in Lake Cowichan and Mesachie Lake show evidence of attacks from this lamprey, and based on the severity of the wounds inflicted, an estimated 15% of these attacks would probably result in the death of the host (Ref. 89241 ). (fishbase.org)
  • destructive
  • Sea lampreys are so destructive that, under some conditions, only one out of seven fish attacked will survive. (umn.edu)
  • Sea lampreys are one of the most costly and destructive Great Lakes' invaders," said Wagner, who published his results in the current issue of the Canadian Journal of Fisheries and Aquatic Sciences . (weeklyworldnews.com)
  • genome
  • There's no definitive answer, but 59 researchers, led by Michigan State University's Weiming Li, may find out now that they have mapped the sea lamprey genome. (greatlakesecho.org)
  • Researchers have discovered that the sea lamprey, which emerged from jawless fish first appearing 500 million years ago, dramatically remodels its genome. (scitech-news.com)
  • Smith, Amemiya and their research team inadvertently discovered the dynamic transformations in the sea lamprey genome while studying the genetic origins of its immune system. (scitech-news.com)
  • 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)
  • Learning how sea lamprey DNA rearrangements are regulated during development might provide information on what stabilizes or changes the genome, he said, as well the role of restructuring in helping form different types of body cells, like fin, muscle, or liver cells. (scitech-news.com)
  • If 20 percent of their genome disappears, how do sea lampreys pass along the full complement of their genes to their offspring? (scitech-news.com)
  • abundance
  • Therefore, the GLFC must prioritize streams according to estimated lamprey abundance, known treatment costs, and available budget. (usgs.gov)
  • A U.S. Fish and Wildlife Service assessment crew will conduct work on the Clinton River in Macomb County during May 14 to June 10 to estimate the abundance of lampreys offshore of the Clinton River. (dailytribune.com)
  • swim
  • They spread the lampricide in streams in the spring, to kill some of the young lamprey as they swim down into the lake. (publicradio.org)
  • The proposed changes are designed to attract more adults into the trap, and to entice lampreys to swim through the pipe to the hatchery. (glfc.org)
  • 1921
  • Construction and improvements on the Erie and Welland Canal (between Lake Ontario and Lake Erie) around 1921 allowed sea lampreys to get through the canal to the next lake. (lake-link.com)
  • dams
  • By blocking certain streams with these chemical dams, sea lampreys can be steered away from environmentally sensitive areas and into waterways where pesticides could be used more effectively to eliminate a larger, more concentrated population of sea lampreys. (weeklyworldnews.com)
  • researchers
  • After screening thousands of chemicals, researchers at the former U.S. Fish and Wildlife Service Fish Laboratory in La Crosse discovered TFM, a chemical effective in killing larval sea lampreys. (newrichmond-news.com)
  • Previous researchers have produced sea lamprey-specific eDNA primers and cPCR assays (Gingera et al. (usgs.gov)
  • 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)
  • Researchers that Michigan State University are looking into the use of such repellants to prevent the ever growing sea lamprey population from entering certain areas. (weeklyworldnews.com)
  • body fluids
  • Sea lampreys attach to fish with a suction cup mouth, rasp a hole though the fish s scales and skin, and feed on blood and body fluids. (dailytribune.com)
  • The tongue bores a hole through the fish's scales and skin, and the sea lamprey feed on the fish's blood and body fluids. (openparliament.ca)
  • assessment
  • Providing a quantitative assessment using eDNA, which is minimally labor intensive, could assist management with stream prioritization by supplementing traditional assessment techniques. (usgs.gov)
  • Conservation
  • The project is working on the restoration of the Lower Shannon Special Area of Conservation (Mulkear River catchment) for Atlantic Salmon, Sea Lamprey and European Otter. (mulkearlife.com)