David M Warner, PhD (Former Employee)
Science and Products
Data releases by this scientist
Multimedia related to this scientist
Publications by this scientist
Filter Total Items: 53
Status of pelagic prey fishes in Lake Michigan, 2012 Status of pelagic prey fishes in Lake Michigan, 2012
Acoustic surveys were conducted in late summer/early fall during the years 1992-1996 and 2001-2012 to estimate pelagic prey fish biomass in Lake Michigan. Midwater trawling during the surveys as well as target strength provided a measure of species and size composition of the fish community for use in scaling acoustic data and providing species-specific abundance estimates. The 2012...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Randall M. Claramunt, Dale Hanson
Influences on Bythotrephes longimanus life-history characteristics in the Great Lakes Influences on Bythotrephes longimanus life-history characteristics in the Great Lakes
We compared Bythotrephes population demographics and dynamics to predator (planktivorous fish) and prey (small-bodied crustacean zooplankton) densities at a site sampled through the growing season in Lakes Michigan, Huron, and Erie. Although seasonal average densities of Bythotrephes were similar across lakes (222/m2 Erie, 247/m2 Huron, 162/m2 Michigan), temporal trends in abundance...
Authors
Steven A. Pothoven, Henry A. Vanderploeg, David M. Warner, Jeffrey S. Schaeffer, Stuart A. Ludsin, Randall M. Claramunt, Thomas F. Nalepa
Relationship between mid-water trawling effort and catch composition uncertainty in two large lakes (Huron and Michigan) dominated by alosines, osmerids, and coregonines Relationship between mid-water trawling effort and catch composition uncertainty in two large lakes (Huron and Michigan) dominated by alosines, osmerids, and coregonines
Because it is not possible to identify species with echosounders alone, trawling is widely used as a method for collecting species and size composition data for allocating acoustic fish density estimates to species or size groups. In the Laurentian Great Lakes, data from midwater trawls are commonly used for such allocations. However, there are no rules for how much midwater trawling...
Authors
David M. Warner, Randall M. Claramunt, Jeffrey S. Schaeffer, Daniel L. Yule, Tom R. Hrabik, Bernie Peintka, Lars G. Rudstam, Jeffrey D. Holuszko, Timothy P. O’Brien
Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish
Oligotrophic lakes are generally dominated by calanoid copepods because of their competitive advantage over cladocerans at low prey densities. Planktivory also can alter zooplankton community structure. We sought to understand the role of planktivory in driving recent changes to the zooplankton community of Lake Huron, a large oligotrophic lake on the border of Canada and the United...
Authors
D.B. Bunnell, R. Douglas Hunter, D.M. Warner, M.A. Chriscinske, E.F. Roseman
The Lake Huron pelagic fish community: persistent spatial pattern along biomass and species composition gradients The Lake Huron pelagic fish community: persistent spatial pattern along biomass and species composition gradients
Spatial patterns in the biomass of pelagic fish in Lake Huron have persisted over 10 years even though biomass decreased 86% and the fish community shifted from dominance by non-native species (rainbow smelt, Osmerus mordax) to dominance by native species (bloater, Coregonus hoyi). Based on multivariate analyses of acoustic biomass data and abiotic variables from the years 1997, 2004...
Authors
D.M. Warner, J.S. Schaeffer, T. P. O’Brien
Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan
Efforts to restore self-sustaining lake trout (Salvelinus namaycush) populations in the Laurentian Great Lakes have had widespread success in Lake Superior; but in other Great Lakes, populations of lake trout are maintained by stocking. Recruitment bottlenecks may be present at a number of stages of the reproduction process. To study eggs and fry, it is necessary to identify spawning...
Authors
D.M. Warner, R.M. Claramunt, J. Janssen, D.J. Jude, N. Wattrus
Non-USGS Publications**
Warner, D.M., Rudstam, L.G., and Klumb, R.A. 2002. In situ target strength of alewives in freshwater. Trans. Am. Fish. Soc. 131:212-223.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Data releases by this scientist
Multimedia related to this scientist
Publications by this scientist
Filter Total Items: 53
Status of pelagic prey fishes in Lake Michigan, 2012 Status of pelagic prey fishes in Lake Michigan, 2012
Acoustic surveys were conducted in late summer/early fall during the years 1992-1996 and 2001-2012 to estimate pelagic prey fish biomass in Lake Michigan. Midwater trawling during the surveys as well as target strength provided a measure of species and size composition of the fish community for use in scaling acoustic data and providing species-specific abundance estimates. The 2012...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Randall M. Claramunt, Dale Hanson
Influences on Bythotrephes longimanus life-history characteristics in the Great Lakes Influences on Bythotrephes longimanus life-history characteristics in the Great Lakes
We compared Bythotrephes population demographics and dynamics to predator (planktivorous fish) and prey (small-bodied crustacean zooplankton) densities at a site sampled through the growing season in Lakes Michigan, Huron, and Erie. Although seasonal average densities of Bythotrephes were similar across lakes (222/m2 Erie, 247/m2 Huron, 162/m2 Michigan), temporal trends in abundance...
Authors
Steven A. Pothoven, Henry A. Vanderploeg, David M. Warner, Jeffrey S. Schaeffer, Stuart A. Ludsin, Randall M. Claramunt, Thomas F. Nalepa
Relationship between mid-water trawling effort and catch composition uncertainty in two large lakes (Huron and Michigan) dominated by alosines, osmerids, and coregonines Relationship between mid-water trawling effort and catch composition uncertainty in two large lakes (Huron and Michigan) dominated by alosines, osmerids, and coregonines
Because it is not possible to identify species with echosounders alone, trawling is widely used as a method for collecting species and size composition data for allocating acoustic fish density estimates to species or size groups. In the Laurentian Great Lakes, data from midwater trawls are commonly used for such allocations. However, there are no rules for how much midwater trawling...
Authors
David M. Warner, Randall M. Claramunt, Jeffrey S. Schaeffer, Daniel L. Yule, Tom R. Hrabik, Bernie Peintka, Lars G. Rudstam, Jeffrey D. Holuszko, Timothy P. O’Brien
Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish Planktivory in the changing Lake Huron zooplankton community: Bythotrephes consumption exceeds that of Mysis and fish
Oligotrophic lakes are generally dominated by calanoid copepods because of their competitive advantage over cladocerans at low prey densities. Planktivory also can alter zooplankton community structure. We sought to understand the role of planktivory in driving recent changes to the zooplankton community of Lake Huron, a large oligotrophic lake on the border of Canada and the United...
Authors
D.B. Bunnell, R. Douglas Hunter, D.M. Warner, M.A. Chriscinske, E.F. Roseman
The Lake Huron pelagic fish community: persistent spatial pattern along biomass and species composition gradients The Lake Huron pelagic fish community: persistent spatial pattern along biomass and species composition gradients
Spatial patterns in the biomass of pelagic fish in Lake Huron have persisted over 10 years even though biomass decreased 86% and the fish community shifted from dominance by non-native species (rainbow smelt, Osmerus mordax) to dominance by native species (bloater, Coregonus hoyi). Based on multivariate analyses of acoustic biomass data and abiotic variables from the years 1997, 2004...
Authors
D.M. Warner, J.S. Schaeffer, T. P. O’Brien
Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan
Efforts to restore self-sustaining lake trout (Salvelinus namaycush) populations in the Laurentian Great Lakes have had widespread success in Lake Superior; but in other Great Lakes, populations of lake trout are maintained by stocking. Recruitment bottlenecks may be present at a number of stages of the reproduction process. To study eggs and fry, it is necessary to identify spawning...
Authors
D.M. Warner, R.M. Claramunt, J. Janssen, D.J. Jude, N. Wattrus
Non-USGS Publications**
Warner, D.M., Rudstam, L.G., and Klumb, R.A. 2002. In situ target strength of alewives in freshwater. Trans. Am. Fish. Soc. 131:212-223.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.