Jean V Adams, PhD

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  Filter Total Items: 78

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  Year2022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995

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  March 17, 2022

  Pedigree analysis and estimates of effective breeding size characterize sea lamprey reproductive biology

  The sea lamprey (Petromyzon marinus) is an invasive species in the Great Lakes and the focus of a large control and assessment program. Current assessment methods provide information on the census size of spawning adult sea lamprey in a small number of streams, but information characterizing reproductive success of spawning adults is rarely available. We used RAD-capture sequencing to genotype sin

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  Ecosystems, Great Lakes Science Center

  March 2, 2022

  Estimation of lake-scale stock-recruitment models for Great Lakes sea lampreys

  Understanding recruitment dynamics is an essential part of effective fisheries management, whether the focus is on conservation, harvest policy development, or invasive species control. We developed a model that estimates lake-wide Ricker stock-recruitment relations for invasive sea lampreys (Petromyzon marinus) in each of the five Laurentian Great Lakes to inform future control efforts. We fit ad

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  Ecosystems, Great Lakes Science Center

  November 22, 2021

  Foreword: Control and conservation of lampreys beyond 2020 - Proceedings from the 3rd Sea Lamprey International Symposium (SLIS III)

  Introduction to the special issue on the 3rd Sea Lamprey International Symposium. The compiled papers in this special issue consist of a combination of syntheses requested in advance of the symposium and perspectives that emerged from the symposium break-out discussions. These written contributions address the symposium goals of updating our understanding of sea lamprey control and research on lam

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  Ecosystems, Great Lakes Science Center

  November 8, 2021

  Setting and tracking suppression targets for sea lampreys in the Great Lakes

  In response to invasive species, the course of action taken by management agencies often evolves over a range of options from a do-nothing approach to suppression to complete eradication. As a case study of suppression targets, we explore the history of approaches used by the Great Lakes Fishery Commission in response to the invasion of the Laurentian Great Lakes by sea lampreys (Petromyzon marinu

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  Ecosystems, Great Lakes Science Center

  April 29, 2021

  Quantifying Great Lakes sea lamprey populations using an index of adults

  Effective control of aquatic invasive species requires knowledge of the population throughout the infested area. Lake-wide assessments of invasive sea lampreys (Petromyzon marinus) are used to assess their status in the Laurentian Great Lakes, informing fisheries managers and decision makers in the sea lamprey control program. Initially these assessments focused on an estimate of absolute abundanc

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  Ecosystems, Great Lakes Science Center

  April 24, 2021

  Trade-offs between suppression and eradication of sea lampreys from the Great Lake

  Ecosystem managers confronted with newly invasive species may respond with a program of suppression or eradication. Suppression of an invasive species refers to management of a species such that its effect on other biota in the local ecosystem is acceptable. Eradication is the removal of all individuals of a species from a defined region. We examine the cost and benefit trade-offs between suppress

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  Ecosystems, Great Lakes Science Center

  October 6, 2020

  A review of an electric weir and fishway in a Great Lakes tributary from conception to termination

  A successful management plan requires clear goals and a process for evaluation. Without them, managers risk operational shifts in which continuous changes disguised as improvements may have little beneficial effect. The conception, design, and operation of an electric barrier and fishway on the Pere Marquette River of Lake Michigan serve as an illustration. The Great Lakes Fishery Commission opera

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  Ecosystems, Great Lakes Science Center

  August 29, 2020

  Investigating apparent misalignment of predator-prey dynamics: Great Lakes lake trout and sea lampreys

  Interpreting ecological dynamics is challenging when observed patterns are not aligned with presumed models. Investigating possible sources of uncertainty is critical to understand the underlying system and ultimately inform management decisions. In this study, we used simulation to investigate the hypothesis that observed inconsistencies in Great Lakes lake trout (Salvelinus namaycush) and sea la

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  Ecosystems, Great Lakes Science Center

  August 20, 2020

  Winter severity, fish community, and availability to traps explain most of the variability in estimates of adult sea lamprey in Lake Superior

  Animal populations are assessed to estimate rates of artificial and natural mortality at ecologically relevant spatial and temporal scales to develop exploitation quotas. But how the population’s natural mortality rate and how the ability to observe the population changes through time are poorly understood in most invasive fishes, despite efforts to control their populations. By investigating a 30

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  Ecosystems, Great Lakes Science Center

  August 19, 2020

  Using simulation to understand annual sea lamprey marking rates on lake trout

  Sea lampreys attack fish, killing some and leaving marks on others. Great Lakes fishery managers rely on observed marking rates to assess the success of the sea lamprey control program and estimate sea lamprey-induced mortality of lake trout. Because marking rates are only observed on survivors of sea lamprey attacks, they may not provide a reliable index of actual attack or mortality rates. To in

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  Ecosystems, Great Lakes Science Center

  August 19, 2020

  Evidence of host switching: Sea lampreys disproportionately attack Chinook salmon when lake trout abundance is low in Lake Ontario

  Lake trout (Salvelinus namaycush) is the presumed preferred host of the invasive sea lamprey (Petromyzon marinus) in the Great Lakes, but little is understood about this preference outside of laboratory experiments. By preference we mean sea lamprey attacks on hosts are disproportionate to host relative abundance. The purpose of this study was to quantify host preference of sea lampreys in the fie

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  Ecosystems, Great Lakes Science Center

  August 14, 2020

  Assessing the assumptions of classification agreement, accuracy, and predictable healing time of sea lamprey wounds on lake trout

  Sea lamprey control in the Laurentian Great Lakes relies on records of sea lamprey wounds on lake trout to assess whether control efforts are supporting fisheries management targets. Wounding records have been maintained for 70 years under the assumption that they are a reliable and accurate reflection of sea lamprey damage inflicted on fish populations. However, two key assumptions underpinning t

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  Ecosystems, Great Lakes Science Center
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  June 1, 2021

  Siefkes, Miehls, Johnson, Adams Present to Great Lakes Sea Lamprey Control Board

  Presentation to the Sea Lamprey Control Board of Great Lakes Fishery Commission

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  May 30, 2019

  Jean Adams Speaks at Sea Lamprey Wound Assessment Workshop

  Scientists Learn to Categorize Sea Lamprey Wounds

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