Gregory W Kennedy
Gregory Kennedy is a Supervisory Fisheries Biologist based in Ann Arbor, MI.
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Filter Total Items: 36
Adaption of egg and larvae sampling techniques for lake sturgeon and broadcast spawning fishes in a deep river
In this report we describe how we adapted two techniques for sampling lake sturgeon (Acipenser fulvescens) and other fish early life history stages to meet our research needs in the Detroit River, a deep, flowing Great Lakes connecting channel. First, we developed a buoy‐less method for sampling fish eggs and spawning activity using egg mats deployed on the river bottom. The buoy‐less method allow
Authors
Edward F. Roseman, James Boase, Gregory W. Kennedy, Jaquelyn M. Craig, Karen Soper
Lake sturgeon response to a spawning reef constructed in the Detroit river
Prior to the First World War, the bi-national Detroit River provided vast areas of functional fish spawning and nursery habitat. However, ongoing conflicting human uses of these waters for activities such as waste disposal, water withdrawals, shoreline development, shipping, recreation, and fishing have altered many of the chemical, physical, and biological processes of the Detroit River. Of parti
Authors
Edward F. Roseman, B. Manny, J. Boase, M. Child, G. Kennedy, J. Craig, K. Soper, R. Drouin
Spawning by walleye (Sander vitreus) and white sucker (Catostomus commersoni) in the Detroit River: Implications for spawning habitat enhancement
Few active fish spawning grounds have been found in channels connecting the Great Lakes. Here, we describe one near Belle Isle in the Detroit River, part of the channel connecting lakes Huron and Erie. There, in 2005, we collected 1,573 fish eggs, cultured them, and identified the hatched larvae as walleye (Sander vitreus) and white sucker (Catostomus commersoni). Walleye spawning peaked during th
Authors
B.A. Manny, G.W. Kennedy, J.C. Boase, J.D. Allen, E.F. Roseman
First evidence of egg deposition by walleye (Sander vitreus) in the Detroit River
The importance of fish spawning habitat in channels connecting the Great Lakes to fishery productivity in those lakes is poorly understood and has not been adequately documented. The Detroit River is a reputed spawning and nursery area for many fish, including walleye (Sander vitreus) that migrate between adjacent Lakes Erie and St. Clair. During April–May 2004, near the head of the Detroit River,
Authors
B.A. Manny, G.W. Kennedy, J.D. Allen, J. R. P. French
Evidence of lake whitefish spawning in the Detroit River: Implications for habitat and population recovery
Historic reports imply that the lower Detroit River was once a prolific spawning area for lake whitefish (Coregonus clupeaformis) prior to the construction of the Livingstone shipping channel in 1911. Large numbers of lake whitefish migrated into the river in fall where they spawned on expansive limestone bedrock and gravel bars. Lake whitefish were harvested in the river during this time by comme
Authors
E.F. Roseman, G.W. Kennedy, J. Boase, B.A. Manny, T. N. Todd, W. Stott
Spawning by lake sturgeon (Acipenser fulvescens) in the Detroit River
Overfishing and habitat destruction in the early 1900s devastated lake sturgeon (Acipenser fulvescens) populations in the Great Lakes. Although a comprehensive restoration strategy for this species was recently drafted by the Michigan Department of Natural Resources, a lack of current data on Great Lakes sturgeon stocks has hindered rehabilitation efforts. Historically, the Detroit River supported
Authors
N.M. Caswell, D. L. Peterson, B.A. Manny, G.W. Kennedy
Starvation resistance in lake trout fry
Newly hatched fry were acclimated to 7 or 12°C and either fed daily (controls) or denied food for varying lengths of time and then fed daily until the end of the study (day 91 at 7°C and day 43 at 12°C). Growth was reduced by delays in the onset of feeding of 27 or more days at 7°C and 7 or more days at 12°C. Mortality of fry unfed for more than 34 days at 7°C, or more than 21 days at 12°C, was hi
Authors
Thomas A. Edsall, Bruce A. Manny, Gregory W. Kennedy
Assessment of lake sturgeon (Acipenser fulvescens) spawning efforts in the lower St. Clair River, Michigan
One of the most threatened remaining populations of lake sturgeon in the Great Lakes is found in the connecting channels between Lake Huron and Lake Erie. Only two spawning grounds are presently known to be active in this region, and both are in the St. Clair River. The spawning reef in the St. Clair River delta has been recently colonized by round gobies (Neogobius melanostomus) in densities up t
Authors
S. Jerrine Nichols, Gregory Kennedy, Eric Crawford, Jeffrey Allen, John French, Glen Black, Marc Blouin, James P. Hickey, Sergei Chernyak, Robert Haas, Michael Thomas
Visualization of a drifting buoy deployment on Lake St. Clair within the Great Lakes Waterway from August 12-15, 2002
Lake St. Clair is a 430 square mile lake between the state of Michigan and the province of Ontario, which forms part of the international boundary between the United States and Canada in the Great Lakes Basin. Lake St. Clair receives most of its inflow from Lake Huron through St. Clair River, which has an average flow of 182,000 cubic feet per second. The lake discharges to Detroit River, where it
Authors
David J. Holtschlag, Atiq U. Syed, Gregory W. Kennedy
Known lake sturgeon (Acipenser fulvescens) spawning habitat in the channel between lakes Huron and Erie in the Laurentian Great Lakes
Bottom substrates and overlying water at three sites where lake sturgeon were reported by others to spawn in the 160-km channel between lakes Huron and Erie were surveyed by boat just before or after the exact time of spawning in 2001 to determine the kinds of substrates present and differences in water quality at the sites. Substrates, examined and photographed using a high-resolution, underwater
Authors
B.A. Manny, G.W. Kennedy
Habitat shift in invading species: Zebra and quagga mussel population characteristics on shallow soft substrates
Unexpected habitat innovations among invading species are illustrated by the expansion of dreissenid mussels across sedimentary environments in shallow water unlike the hard substrates where they are conventionally known. In this note, records of population characteristics of invading zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussels from 1994 through 1998 are reported from shal
Authors
P.A. Berkman, D.W. Garton, M.A. Haltuch, G.W. Kennedy, L.R. Febo
Survey of Lake Ontario bottom sediment off Rochester, New York, to define the extent of jettisoned World War II matériel and its potential for sediment contamination
Military-type matériel was recovered from the bottom of Lake Ontario near Rochester, N.Y., during bottom-trawl, fish-stock surveys at depths of 75 to 180 feet each year from 1978 through 1996. The recovered matériel included many shell-detonator nose cones (2 inches in diameter by about 3.5 inches long); several electronic components; one corroded box of detonators; a corrugated container of mercu
Authors
Gregory Kennedy, William M. Kappel
News about this scientist
Science and Products
Data releases by this scientist
Multimedia related to this scientist
Publications by this scientist
Filter Total Items: 36
Adaption of egg and larvae sampling techniques for lake sturgeon and broadcast spawning fishes in a deep river
In this report we describe how we adapted two techniques for sampling lake sturgeon (Acipenser fulvescens) and other fish early life history stages to meet our research needs in the Detroit River, a deep, flowing Great Lakes connecting channel. First, we developed a buoy‐less method for sampling fish eggs and spawning activity using egg mats deployed on the river bottom. The buoy‐less method allow
Authors
Edward F. Roseman, James Boase, Gregory W. Kennedy, Jaquelyn M. Craig, Karen Soper
Lake sturgeon response to a spawning reef constructed in the Detroit river
Prior to the First World War, the bi-national Detroit River provided vast areas of functional fish spawning and nursery habitat. However, ongoing conflicting human uses of these waters for activities such as waste disposal, water withdrawals, shoreline development, shipping, recreation, and fishing have altered many of the chemical, physical, and biological processes of the Detroit River. Of parti
Authors
Edward F. Roseman, B. Manny, J. Boase, M. Child, G. Kennedy, J. Craig, K. Soper, R. Drouin
Spawning by walleye (Sander vitreus) and white sucker (Catostomus commersoni) in the Detroit River: Implications for spawning habitat enhancement
Few active fish spawning grounds have been found in channels connecting the Great Lakes. Here, we describe one near Belle Isle in the Detroit River, part of the channel connecting lakes Huron and Erie. There, in 2005, we collected 1,573 fish eggs, cultured them, and identified the hatched larvae as walleye (Sander vitreus) and white sucker (Catostomus commersoni). Walleye spawning peaked during th
Authors
B.A. Manny, G.W. Kennedy, J.C. Boase, J.D. Allen, E.F. Roseman
First evidence of egg deposition by walleye (Sander vitreus) in the Detroit River
The importance of fish spawning habitat in channels connecting the Great Lakes to fishery productivity in those lakes is poorly understood and has not been adequately documented. The Detroit River is a reputed spawning and nursery area for many fish, including walleye (Sander vitreus) that migrate between adjacent Lakes Erie and St. Clair. During April–May 2004, near the head of the Detroit River,
Authors
B.A. Manny, G.W. Kennedy, J.D. Allen, J. R. P. French
Evidence of lake whitefish spawning in the Detroit River: Implications for habitat and population recovery
Historic reports imply that the lower Detroit River was once a prolific spawning area for lake whitefish (Coregonus clupeaformis) prior to the construction of the Livingstone shipping channel in 1911. Large numbers of lake whitefish migrated into the river in fall where they spawned on expansive limestone bedrock and gravel bars. Lake whitefish were harvested in the river during this time by comme
Authors
E.F. Roseman, G.W. Kennedy, J. Boase, B.A. Manny, T. N. Todd, W. Stott
Spawning by lake sturgeon (Acipenser fulvescens) in the Detroit River
Overfishing and habitat destruction in the early 1900s devastated lake sturgeon (Acipenser fulvescens) populations in the Great Lakes. Although a comprehensive restoration strategy for this species was recently drafted by the Michigan Department of Natural Resources, a lack of current data on Great Lakes sturgeon stocks has hindered rehabilitation efforts. Historically, the Detroit River supported
Authors
N.M. Caswell, D. L. Peterson, B.A. Manny, G.W. Kennedy
Starvation resistance in lake trout fry
Newly hatched fry were acclimated to 7 or 12°C and either fed daily (controls) or denied food for varying lengths of time and then fed daily until the end of the study (day 91 at 7°C and day 43 at 12°C). Growth was reduced by delays in the onset of feeding of 27 or more days at 7°C and 7 or more days at 12°C. Mortality of fry unfed for more than 34 days at 7°C, or more than 21 days at 12°C, was hi
Authors
Thomas A. Edsall, Bruce A. Manny, Gregory W. Kennedy
Assessment of lake sturgeon (Acipenser fulvescens) spawning efforts in the lower St. Clair River, Michigan
One of the most threatened remaining populations of lake sturgeon in the Great Lakes is found in the connecting channels between Lake Huron and Lake Erie. Only two spawning grounds are presently known to be active in this region, and both are in the St. Clair River. The spawning reef in the St. Clair River delta has been recently colonized by round gobies (Neogobius melanostomus) in densities up t
Authors
S. Jerrine Nichols, Gregory Kennedy, Eric Crawford, Jeffrey Allen, John French, Glen Black, Marc Blouin, James P. Hickey, Sergei Chernyak, Robert Haas, Michael Thomas
Visualization of a drifting buoy deployment on Lake St. Clair within the Great Lakes Waterway from August 12-15, 2002
Lake St. Clair is a 430 square mile lake between the state of Michigan and the province of Ontario, which forms part of the international boundary between the United States and Canada in the Great Lakes Basin. Lake St. Clair receives most of its inflow from Lake Huron through St. Clair River, which has an average flow of 182,000 cubic feet per second. The lake discharges to Detroit River, where it
Authors
David J. Holtschlag, Atiq U. Syed, Gregory W. Kennedy
Known lake sturgeon (Acipenser fulvescens) spawning habitat in the channel between lakes Huron and Erie in the Laurentian Great Lakes
Bottom substrates and overlying water at three sites where lake sturgeon were reported by others to spawn in the 160-km channel between lakes Huron and Erie were surveyed by boat just before or after the exact time of spawning in 2001 to determine the kinds of substrates present and differences in water quality at the sites. Substrates, examined and photographed using a high-resolution, underwater
Authors
B.A. Manny, G.W. Kennedy
Habitat shift in invading species: Zebra and quagga mussel population characteristics on shallow soft substrates
Unexpected habitat innovations among invading species are illustrated by the expansion of dreissenid mussels across sedimentary environments in shallow water unlike the hard substrates where they are conventionally known. In this note, records of population characteristics of invading zebra (Dreissena polymorpha) and quagga (Dreissena bugensis) mussels from 1994 through 1998 are reported from shal
Authors
P.A. Berkman, D.W. Garton, M.A. Haltuch, G.W. Kennedy, L.R. Febo
Survey of Lake Ontario bottom sediment off Rochester, New York, to define the extent of jettisoned World War II matériel and its potential for sediment contamination
Military-type matériel was recovered from the bottom of Lake Ontario near Rochester, N.Y., during bottom-trawl, fish-stock surveys at depths of 75 to 180 feet each year from 1978 through 1996. The recovered matériel included many shell-detonator nose cones (2 inches in diameter by about 3.5 inches long); several electronic components; one corroded box of detonators; a corrugated container of mercu
Authors
Gregory Kennedy, William M. Kappel
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