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FEBRUARY 4, 2008






To:  GLIN Announce


The Great Lakes Fishery Commission is pleased to inform you about the completion of several research projects related to the Great Lakes fishery, invasive species, and management.  A summary of the research, and links to a complete news release, are below.


PRESERVED FISH AND STABLE ISOTOPES HELP RECONSTRUCT HISTORICAL GREAT LAKES FOOD WEBS—Using stable isotope analysis and museum-preserved fish, scientists at the University of Wisconsin - Madison have completed a study on the historical food webs of the Great Lakes and unraveled important historical information about the ecology of a diverse and highly threatened group of fishes called the deepwater ciscoes.  The study, supported by the Great Lakes Fishery Commission and Wisconsin Sea Grant, may provide useful information to fisheries managers interested in restoring and rehabilitating these Great Lakes fishes . . . [complete release at www.glfc.org/pressrel/vanderzanden.pdf]


EARLY AND CONSISTENT STAKEHOLDER INVOLVEMENT YIELD MORE SUSTAINABLE FISHERY MANAGEMENT DECISIONS—Researchers at Michigan State University have analyzed case studies of fishery management around North America to determine ways to improve inclusion of stakeholders – anyone affected by or who may affect fisheries – in decisions about Great Lakes fisheries.  The researchers found that cases where stakeholders were included early and often during decisions resulted in more sustainable decisions and thus a more stable or predictable environment for all parties involved in fisheries . . . [complete release at www.glfc.org/pressrel/riley.pdf]


NEW RESEARCH EXPLAINS RELATIONSHIP BETWEEN COMMERCIAL PRICE, AMOUNT OF HARVEST, AND ALARMING DECLINE IN AMERICAN EEL—Researchers from Queen’s University have analyzed commercial American eel harvest and price data from the period 1950 to 2004 from across the range of the species to gain a better understanding of possible factors leading to the dramatic decline of the key native species.  The research concluded that an increase in the value and price of the American eel, along with high abundances in the early days of commercial exploitation, heavy exploitation, and expanded and integrated markets, created a demand that contributed to a permanent reduction in the reproductive capacity of the species.  This inability of the species to replenish itself subsequently led to severe declines in recruitment and population size . . . [complete release at www.glfc.org/pressrel/casselman.pdf]


SCIENTISTS USE ODOUR CUES TO LURE INVASIVE ROUND GOBIES INTO TRAPS—New  research conducted by scientists from the University of Windsor and the Ontario Ministry of natural resources provide initial evidence that one of the Great Lakes’ most invasive pests, the round goby, could be lured into traps by the scent of male round goby urine.  The research could lead to management techniques aimed at reducing round goby abundance in critical habitats or limiting and possibly preventing their spread into new waterways . . . [complete release at www.glfc.org/pressrel/Corkum.pdf]


NEW METHODS DEVELOPED TO ESTIMATE SEA LAMPREY DAMAGE— A research team has developed new methods for estimating the diets of the sea lamprey, one of the most devastating species to have invaded the Great Lakes.  Measuring the diets of sea lamprey will give scientists and managers a better picture of how much ecological and economic damage each sea lamprey causes over its life cycle.  While the findings support the long-held belief that sea lamprey prefer to feed on large fish like lake trout, they also indicate that sea lamprey affect many other species, and that those effects differ from time to time and place to place . . . . [complete release at www.glfc.org/pressrel/levin.pdf]




The Great Lakes Fishery Commission is an international organization established by the United States and Canada through the 1954 Convention on Great Lakes Fisheries.  The commission has the responsibility to support fisheries research, control the invasive sea lamprey in the Great Lakes, and facilitate implementation of A Joint Strategic Plan for Management of Great Lakes Fisheries, a provincial, state, and tribal fisheries management agreement.  To learn more about the commission and its research program, visit www.glfc.org.





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Marc Gaden, PhD
Communications Officer and Legislative Liaison
Great Lakes Fishery Commission
2100 Commonwealth Blvd. Ste 100
Ann Arbor, MI  48105
734-662-3209 x. 14