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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)
  • 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)
  • 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)
  • juveniles
  • The cell types within the endocrine pancreatic tissue and anterior intestine of larvae and juveniles of representatives of the two southern- hemisphere families (Mordaciidae and Geotriidae) were compared, using immunohistochemistry and antisera against insulin (lamprey, bovine), two somatostatins (SST-14, -34), two PP-family peptides (aPY, NPY), and salmon glucagon and glucagon-like peptide (GLP). (edu.au)
  • University of Minnesota biologist Peter Sorensen says he and other scientists noticed that TFM kills not just the juveniles, but the larvae that live in the stream bed too. (publicradio.org)
  • adults
  • Existing genetic markers were used to identify chestnut lamprey for this study, but the lack of genetic markers for silver and northern brook lampreys forced our preliminary classification of these two species to be based on stream-specific catch records of adults. (ebscohost.com)
  • 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)
  • Scientists suspected the larvae might play a role in the spawning migration of adults. (publicradio.org)
  • That might mean the larvae are putting out a pheromone that tells the adults it's a good place to spawn. (publicradio.org)
  • pheromone
  • After 15 years' work, Peter Sorensen and his colleagues have isolated and synthesized a pheromone they say will attract large numbers of lamprey, to improve the performance of various control methods. (publicradio.org)
  • Now, the Environmental Protection Agency has granted the first-ever permit to experiment with a lamprey pheromone on the Trout River in Michigan. (publicradio.org)
  • If this is used in the Great Lakes Basin to control sea lamprey, it'll be, to my knowledge, the largest ecosystem in the world where pheromone control is used to control an invasive pest. (npr.org)
  • Here, we present a protocol to isolate and characterize the structure, olfactory potency, and behavioral response of putative pheromone compounds of sea lampreys. (jove.com)
  • destructive
  • Sea lampreys are so destructive that, under some conditions, only one out of seven fish attacked will survive. (umn.edu)
  • basal
  • Because of their basal position, it is critical to understand when the extant lamprey life history evolved, and if such a life history was present in the last common ancestor of agnathans and gnathostomes. (springer.com)
  • occur
  • In the velum, alveolar cartilage and red muscles occur, although they are histologically different from those of lampreys. (nii.ac.jp)
  • Lampreys are devoid of a mineralized skeleton, although traces of globular calcified cartilage may occur in the endoskeleton. (tolweb.org)
  • 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)
  • Control
  • The information gathered will be used to determine the need for sea lamprey control. (dailytribune.com)
  • Scientists have been trying to keep the invasive sea lamprey under control in the Great Lakes for decades. (publicradio.org)
  • Active control programs to control lampreys are undergoing modifications due to concerns of drinking water quality in some areas. (wikipedia.org)
  • Researchers in the Great Lakes are trying to control an ancient fish, the sea lamprey. (npr.org)
  • Sea lamprey control is one area where we have achieved substantial success. (umn.edu)
  • The control program uses several techniques to attack sea lampreys during different stages of the life cycle. (umn.edu)
  • If sea lamprey control is eased for even a short time, these opportunistic pests bounce back quickly and lethally, and we have a lot of data to demonstrate how that has happened over the years. (openparliament.ca)
  • tanks
  • For two years he sifted through the water in tanks holding lamprey larvae. (publicradio.org)
  • In his home base, a biological station in Northern Michigan on the shores of Lake Huron, there are cement floors and large tanks writhing full of lamprey. (npr.org)
  • Gill
  • Lacking paired fins , adult lampreys have large eyes, one nostril on the top of the head, and seven gill pores on each side of the head. (wikipedia.org)
  • In adult lampreys, respiratory water shuttles between the external gill, -pore … More and branchial sac. (nii.ac.jp)
  • The skin of lampreys is entirely naked ans slimy, and their seven gill openings extend behind the eyes. (tolweb.org)
  • The head of adult lampreys has relatively large eyes, followed posteriorly by a series of seven, rounded gill openings. (tolweb.org)
  • assessment
  • 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)
  • sometimes
  • Although lampreys are sometimes regarded as a delicacy and fished in Europe, the main cause of their disappearance is water pollution, to which they (in particular larvae) are particularly sensitive. (tolweb.org)
  • Fish
  • Sea lamprey are notorious for latching onto other fish and literally sucking the life out of them. (npr.org)