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  • brook lamprey
  • The Northern Brook Lamprey ( Ichthyomyzon fossor ) went undiscovered in Minnesota until 1986, when it was collected from the Blackhoof River in Carlton County and the Zumbro River in Olmsted County. (mn.us)
  • The Northern Brook Lamprey has a single, continuous dorsal fin that may or may not be divided by a shallow notch, connected to a short, round, caudal fin. (mn.us)
  • The Northern Brook Lamprey uses different microhabitats during different stages of its life history. (mn.us)
  • The apparent decline of the Northern Brook Lamprey in North America is a result of habitat degradation and incidental poisoning. (mn.us)
  • tributary
  • In an effort to address concerns regarding the potential for chronic exposure to TFM and niclosamide, this study is being conducted cooperatively by the U.S. Fish and Wildlife Service's Marquette Biological Station and the Upper Midwest Environmental Sciences Center (UMESC) to determine TFM concentrations in water and sediment following a sea lamprey control treatment of a tributary in Lake Superior and Lake Huron. (usgs.gov)
  • Their goal is to develop a plan to combat pollution sources and to protect natural areas on the St. Louis River, an Area of Concern and the largest U.S. tributary to Lake Superior . (umn.edu)
  • swim
  • 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)
  • 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)
  • A pilot study was successfully completed in 1992 which determined the feasibility of using a deepwater electroshocker and global positioning system equipment to take spatially referenced samples of the larval sea lamprey population in the St. Marys River and to map larval population density. (glfc.org)
  • abundance
  • Individual stream treatment needs are currently determined using a variety of assessment techniques which include semi-quantitative surveys of potential habitat as well as sea lamprey ammocoete abundance. (usgs.gov)
  • Lakes
  • However, when the Welland Canal, constructed to bypass the falls, was deepened in 1919, sea lampreys gained access to the rest of the Great Lakes. (umn.edu)
  • For example, before sea lampreys entered the Great Lakes, Canada and the United States harvested about 15 million lbs. (6.8 million kgs. (umn.edu)
  • How Are Sea Lampreys Controlled in the Great Lakes? (umn.edu)
  • ANN ARBOR, Mich. (AP) - Officials say the invasive sea lamprey is gaining ground in Lake Superior and Lake Erie, while its numbers remain at near-historic lows in the other Great Lakes. (wdio.com)
  • For decades, a heated debate has played out among a group of scientists concerning the nativeness of the sea lampreys in Lakes Ontario and Champlain. (glfc.org)
  • On one side lie five papers by two teams of geneticists and a zoogeographer asserting that sea lampreys are native to these two lakes. (glfc.org)
  • At the core of this debate is whether sea lampreys colonized these two lakes thousands of years ago at the end of the Ice Age or whether they dispersed into these lakes much-more recently through the Erie and Champlain shipping canals, which originated in the Hudson River at Albany, New York. (glfc.org)
  • Once established in Lake Ontario, sea lampreys were able to gain access to the other four Great Lakes. (glfc.org)
  • If the sea lamprey is non-native, it would not receive the protection afforded native fishes in Lakes Ontario and Champlain. (glfc.org)
  • Once in Lake Ontario, whether through natural migration up the St. Lawrence River or through canal from the Hudson River, which formerly lacked a connection to the Great Lakes, all parties agree that the sea lamprey gained access to Lake Erie and then the upper Great Lakes through the Welland Canal, bypassing Niagara Falls (see Figure 2). (glfc.org)
  • According to Eshenroder, the genetic data offered in support of a native classification of sea lampreys in Lakes Ontario and Champlain were contradictory. (glfc.org)
  • If sea lampreys were native to Lakes Ontario and Champlain, it was not among the fishes recognized by early naturalists, despite its habit of leaving gruesome wounds on the most valuable fishes like Atlantic salmon. (glfc.org)
  • It is important to recognize the distinguishable features of Sea Lamprey because there are several native freshwater lamprey species found in the Great Lakes region. (lake-link.com)
  • The lamprey invasion made it hard on the people who fished the Great Lakes to make a living. (lake-link.com)
  • From Sea Lamprey: the battle continues working together to protect our great lakes fishery. (lake-link.com)
  • Lake Superior is the largest, coldest, and most pristine of the Great Lakes. (nps.gov)
  • Sea lampreys are a species that invaded the Great Lakes presumably following the improvements made to the Welland Canal in 1920. (usgs.gov)
  • Following their introduction, sea lamprey devastated the commercial and recreational fisheries of the Great Lakes (Lawrie 1970). (usgs.gov)
  • However, due to limitations in budget, personnel, and overcoming geographic logistics it is not feasible to treat every sea lamprey-infested stream of the Great Lakes. (usgs.gov)
  • By the 1930s, sea lamprey were found in all of the Great Lakes. (umn.edu)
  • Scientists have been trying to keep the invasive sea lamprey under control in the Great Lakes for decades. (publicradio.org)
  • Duluth, Minn. - The sea lamprey came into the Great Lakes through canals more than 100 years ago. (publicradio.org)
  • In the battle against invasive sea lampreys in the Great Lakes region, Wisconsin has committed to the fight with new legislation signed last week. (blogspot.fr)
  • selective
  • 1975. Role of glucuronide formation in the selective toxicity of 3-Trifluoromethyl-4-nitrophenol (TFM) for the sea lamprey: Comparative Aspects of TFM Uptake and Conjugation in Sea Lamprey and Rainbow trout. (usgs.gov)
  • temperatures
  • With the warming water temperatures, we're noticing the sea lamprey are starting to do a little better and are getting bigger," [Wildlife Federation spokesperson Melinda Koslow] said. (blogspot.com)
  • Duluth
  • The largest and busiest Minnesota harbor is the combined Port of Duluth/Superior, which handled a total tonnage of 47,234,022 net tons (of various commodities) in 2006. (umn.edu)
  • The Port of Duluth/Superior was the 20th largest U.S. port in total tones moved last year. (umn.edu)
  • It comes into the Port of Duluth/Superior via dedicated 100-car unit trains to Midwest Energy, where it is stockpiled and then loaded onto ships for distribution throughout the Midwest and even overseas. (umn.edu)
  • Canal
  • The alternative scenario supported by Eshenroder's research indicates improvements to the Champlain Canal facilitated passage of sea lampreys into Lake Champlain (see image, right). (glfc.org)
  • These river crossings were junctions where sea lampreys would have escaped the canal, continuing their migration in more-hospitable waterways. (glfc.org)
  • trap
  • During this phase sea lampreys were first observed in the trap, but catches were much lower than expected. (glfc.org)
  • life
  • A significant method of control is the use of chemicals to target the larval phase of the lamprey life cycle (Smith and Tibbles 1980). (usgs.gov)