The establishment of nonindigenous aquatic species is a perturbation that challenges resource man... more The establishment of nonindigenous aquatic species is a perturbation that challenges resource managers in the Great Lakes basin to understand the dynamics of the present system, and predict patterns for the future. The effects of invasive species and their eventual distribution are difficult to predict. Surveillance programs are used by managers as a means of identifying newly established populations, tracking range expansions, assessing the impacts of introduced species on native populations, and evaluating control or management strategies. The ruffe, Gymnocephdus cernuus, like the zebra mussel, is believed to have been introduced to the Great Lakes through ballast water discharge. Since its discovery, surveillance programs have continued to track range expansion and monitor species abundance in areas where ruffe have already colonized as well as in areas where ruffe are likely to colonize. In addition to conducting field surveys, the education of public water users has been instrumental to increasing surveillance efforts. In several cases, recreational anglers were first to report the presence of ruffe at new locations, findings that were later verified with fish sampling gear. Communication with the maritime industry has guided surveillance efforts to shipping ports where ruffe may colonize via ballast water transport. The probability of detection by surveillance sampling of new colonies of ruffe appears to be rather high, because ruffe are highly selective toward favorable habitat at low population densities. Western Lake Superior surveys have documented the natural movement of ruffe, changes in fish species abundance, and the ability of ruffe to become the dominant fish species. Preliminary results suggest declines in native fish populations following the successful establishment of ruffe. Surveys in areas where ruffe have not yet invaded provide information regarding native or currently existing populations, without which it is difficult to determine the effects of an invasion. The proactive management approach exemplified by the Great Lakes Ruffe Surveillance Program, conducted by the U.S. Fish and Wildlife Service and the Ontario Ministry of Natural Resources, provides a model response to species invasions.
Advocates and practitioners of aquatic habitat conservation start from a disadvantage. Not only a... more Advocates and practitioners of aquatic habitat conservation start from a disadvantage. Not only are fish and their habitats out of sight and generally out of mind, they are also downstream from human activities on the landscape. Pave a parking lot, cut timber from a hillside, expose the soil for agriculture, build a road crossing – many everyday activities degrade aquatic habitats, but are not regulated except perhaps by local zoning authorities. Most people are not even aware that they are affecting downstream habitats. The National Fish Habitat Partnership works to broaden the community of support for fish habitat conservation, encouraging local governments, landowners, and businesses to be part of the solution, helping to conserve waterways and fisheries through informed, voluntary action. Social and economic benefits of healthy fish habitats are increasingly well known, but are broadly dispersed across society, except for relatively few fishing-related businesses. Enlisting priv...
The National Fish Habitat Action Plan was approved in 2006, with specific milestones identified f... more The National Fish Habitat Action Plan was approved in 2006, with specific milestones identified for 2010. These objectives have been achieved. Since 2006, a partnership of thousands of people and organizations has emerged to implement the Action Plan. The partnership operates at national, regional, and local scales to focus conservation efforts on common priorities of diverse public and private partners. Partners have organized 17 Fish Habitat Partnerships across the nation; made significant advances in the science of measuring condition of aquatic habitats; raised the profile of fish habitat conservation; and completed hundreds of on-the-ground, cost-shared projects. In 2011 the National Fish Habitat Board will update the Action Plan to reflect the enormous progress that has been made, and to set new objectives for 2015. The Board has delegated a work group to draft new objectives with input from Fish Habitat Partnerships, State and Federal agencies, and the full range of other par...
Spine title: Food, growth and reproduction of crappies in Lake Poinsett, South Dakota. Thesis (M.... more Spine title: Food, growth and reproduction of crappies in Lake Poinsett, South Dakota. Thesis (M.S.)--South Dakota State University, 1977. Includes bibliographical references (leaves 42-44).
In Wisconsin, Chippewa tribal harvests have not had a negative impact on populations of lake trou... more In Wisconsin, Chippewa tribal harvests have not had a negative impact on populations of lake trout, walleye, fishers, and white-tailed deer. The treaty rights controversy is fueled by uncertainties about the status of natural resources, uncertainties that could be addressed by cooperative state-tribal wildlife management programs. (SV)
The establishment of nonindigenous aquatic species is a perturbation that challenges resource man... more The establishment of nonindigenous aquatic species is a perturbation that challenges resource managers in the Great Lakes basin to understand the dynamics of the present system, and predict patterns for the future. The effects of invasive species and their eventual distribution are difficult to predict. Surveillance programs are used by managers as a means of identifying newly established populations, tracking range expansions, assessing the impacts of introduced species on native populations, and evaluating control or management strategies. The ruffe, Gymnocephdus cernuus, like the zebra mussel, is believed to have been introduced to the Great Lakes through ballast water discharge. Since its discovery, surveillance programs have continued to track range expansion and monitor species abundance in areas where ruffe have already colonized as well as in areas where ruffe are likely to colonize. In addition to conducting field surveys, the education of public water users has been instru...
The establishment of nonindigenous aquatic species is a perturbation that challenges resource man... more The establishment of nonindigenous aquatic species is a perturbation that challenges resource managers in the Great Lakes basin to understand the dynamics of the present system, and predict patterns for the future. The effects of invasive species and their eventual distribution are difficult to predict. Surveillance programs are used by managers as a means of identifying newly established populations, tracking range expansions, assessing the impacts of introduced species on native populations, and evaluating control or management strategies. The ruffe, Gymnocephdus cernuus, like the zebra mussel, is believed to have been introduced to the Great Lakes through ballast water discharge. Since its discovery, surveillance programs have continued to track range expansion and monitor species abundance in areas where ruffe have already colonized as well as in areas where ruffe are likely to colonize. In addition to conducting field surveys, the education of public water users has been instrumental to increasing surveillance efforts. In several cases, recreational anglers were first to report the presence of ruffe at new locations, findings that were later verified with fish sampling gear. Communication with the maritime industry has guided surveillance efforts to shipping ports where ruffe may colonize via ballast water transport. The probability of detection by surveillance sampling of new colonies of ruffe appears to be rather high, because ruffe are highly selective toward favorable habitat at low population densities. Western Lake Superior surveys have documented the natural movement of ruffe, changes in fish species abundance, and the ability of ruffe to become the dominant fish species. Preliminary results suggest declines in native fish populations following the successful establishment of ruffe. Surveys in areas where ruffe have not yet invaded provide information regarding native or currently existing populations, without which it is difficult to determine the effects of an invasion. The proactive management approach exemplified by the Great Lakes Ruffe Surveillance Program, conducted by the U.S. Fish and Wildlife Service and the Ontario Ministry of Natural Resources, provides a model response to species invasions.
Advocates and practitioners of aquatic habitat conservation start from a disadvantage. Not only a... more Advocates and practitioners of aquatic habitat conservation start from a disadvantage. Not only are fish and their habitats out of sight and generally out of mind, they are also downstream from human activities on the landscape. Pave a parking lot, cut timber from a hillside, expose the soil for agriculture, build a road crossing – many everyday activities degrade aquatic habitats, but are not regulated except perhaps by local zoning authorities. Most people are not even aware that they are affecting downstream habitats. The National Fish Habitat Partnership works to broaden the community of support for fish habitat conservation, encouraging local governments, landowners, and businesses to be part of the solution, helping to conserve waterways and fisheries through informed, voluntary action. Social and economic benefits of healthy fish habitats are increasingly well known, but are broadly dispersed across society, except for relatively few fishing-related businesses. Enlisting priv...
The National Fish Habitat Action Plan was approved in 2006, with specific milestones identified f... more The National Fish Habitat Action Plan was approved in 2006, with specific milestones identified for 2010. These objectives have been achieved. Since 2006, a partnership of thousands of people and organizations has emerged to implement the Action Plan. The partnership operates at national, regional, and local scales to focus conservation efforts on common priorities of diverse public and private partners. Partners have organized 17 Fish Habitat Partnerships across the nation; made significant advances in the science of measuring condition of aquatic habitats; raised the profile of fish habitat conservation; and completed hundreds of on-the-ground, cost-shared projects. In 2011 the National Fish Habitat Board will update the Action Plan to reflect the enormous progress that has been made, and to set new objectives for 2015. The Board has delegated a work group to draft new objectives with input from Fish Habitat Partnerships, State and Federal agencies, and the full range of other par...
Spine title: Food, growth and reproduction of crappies in Lake Poinsett, South Dakota. Thesis (M.... more Spine title: Food, growth and reproduction of crappies in Lake Poinsett, South Dakota. Thesis (M.S.)--South Dakota State University, 1977. Includes bibliographical references (leaves 42-44).
In Wisconsin, Chippewa tribal harvests have not had a negative impact on populations of lake trou... more In Wisconsin, Chippewa tribal harvests have not had a negative impact on populations of lake trout, walleye, fishers, and white-tailed deer. The treaty rights controversy is fueled by uncertainties about the status of natural resources, uncertainties that could be addressed by cooperative state-tribal wildlife management programs. (SV)
The establishment of nonindigenous aquatic species is a perturbation that challenges resource man... more The establishment of nonindigenous aquatic species is a perturbation that challenges resource managers in the Great Lakes basin to understand the dynamics of the present system, and predict patterns for the future. The effects of invasive species and their eventual distribution are difficult to predict. Surveillance programs are used by managers as a means of identifying newly established populations, tracking range expansions, assessing the impacts of introduced species on native populations, and evaluating control or management strategies. The ruffe, Gymnocephdus cernuus, like the zebra mussel, is believed to have been introduced to the Great Lakes through ballast water discharge. Since its discovery, surveillance programs have continued to track range expansion and monitor species abundance in areas where ruffe have already colonized as well as in areas where ruffe are likely to colonize. In addition to conducting field surveys, the education of public water users has been instru...
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