Steve A Farha
Steve Farha is a Biological Science Technician based in Ann Arbor, MI.
Science and Products
Data releases by this scientist
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Filter Total Items: 20
Identification of lake trout Salvelinus namaycush spawning habitat in northern Lake Huron using high-resolution satellite imagery Identification of lake trout Salvelinus namaycush spawning habitat in northern Lake Huron using high-resolution satellite imagery
The availability and quality of spawning habitat may limit lake trout recovery in the Great Lakes, but little is known about the location and characteristics of current spawning habitats. Current methods used to identify lake trout spawning locations are time- and labor-intensive and spatially limited. Due to the observation that some lake trout spawning sites are relatively clean of...
Authors
Amanda G. Grimm, Colin N. Brooks, Thomas R. Binder, Stephen C. Riley, Steve A. Farha, Robert A. Shuchman, Charles C. Krueger
Status of pelagic prey fishes in Lake Michigan, 2015 Status of pelagic prey fishes in Lake Michigan, 2015
Acoustic surveys were conducted in late summer/early fall during the years 1992-1996 and 2001-2015 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 2015...
Authors
David M. Warner, Randall M. Claramunt, Steve A. Farha, Dale Hanson, Timothy J. Desorcie, Timothy P. O’Brien
Status and trends of the Lake Huron offshore demersal fish community, 1976-2012 Status and trends of the Lake Huron offshore demersal fish community, 1976-2012
The USGS Great Lakes Science Center has conducted trawl surveys to assess annual changes in the offshore demersal fish community of Lake Huron since 1973. Sample sites include five ports in U.S. waters with less frequent sampling near Goderich, Ontario. The 2012 fall bottom trawl survey was carried out between 20 October – 5 November 2012 and included all U.S. ports as well as Goderich...
Authors
Edward F. Roseman, Stephen C. Riley, Steve A. Farha, Bryan M. Maitland, Taaja R. Tucker, Stacy A. Provo, Matthew W. McLean
Status and trends of pelagic prey fish in Lake Huron, 2013 Status and trends of pelagic prey fish in Lake Huron, 2013
The USGS Great Lakes Science Center (GLSC) conducted acoustic and midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2013. The 2013 survey was conducted during September and October and included transects in Lake Huron’s main basin, Georgian Bay, and North Channel. Pelagic fish density was 1,033 fish/ha in 2013 and increased 62% over the 2012 estimate. Total...
Authors
Timothy P. O’Brien, David M. Warner, Steve A. Farha, Darryl W. Hondorp, Lisa A. Kaulfersch, Nicole M. Watson
Status and trends of pelagic prey fishes in Lake Huron, 2012 Status and trends of pelagic prey fishes in Lake Huron, 2012
The USGS Great Lakes Science Center (GLSC) conducted acoustic/midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2012. The 2012 survey was conducted during September and October, and included transects in Lake Huron’s Main Basin, Georgian Bay, and North Channel. Pelagic fish density (638 fish/ha) was lower in 2012 compared to 2011, with density in 2012 only 34% of...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Jeff Schaeffer, Stephen Lenart
Status and trends of pelagic prey fishes in Lake Huron, 2012 Status and trends of pelagic prey fishes in Lake Huron, 2012
The USGS Great Lakes Science Center (GLSC) conducted acoustic/midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2012. The 2012 survey was conducted during September and October, and included transects in Lake Huron’s Main Basin, Georgian Bay, and North Channel. Pelagic fish density (638 fish/ha) was lower in 2012 compared to 2011, with density in 2012 only 34% of...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Jeff Schaeffer, Stephen Lenart
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
Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008 Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008
The U.S.Geological Survey Great Lakes Science Center has conducted trawl surveys to assess annual changes in the deepwater demersal fish community of Lake Huron since 1973. Since 1992, surveys have been carried out using a 21 m wing trawl towed on-contour at depths ranging from 9 to 110 m on fixed transects. Sample sites include five ports in U.S. waters with less frequent sampling near...
Authors
Edward F. Roseman, Timothy P. O’Brien, Stephen C. Riley, Steve A. Farha, John R. French
Science and Products
Data releases by this scientist
Publications by this scientist
Filter Total Items: 20
Identification of lake trout Salvelinus namaycush spawning habitat in northern Lake Huron using high-resolution satellite imagery Identification of lake trout Salvelinus namaycush spawning habitat in northern Lake Huron using high-resolution satellite imagery
The availability and quality of spawning habitat may limit lake trout recovery in the Great Lakes, but little is known about the location and characteristics of current spawning habitats. Current methods used to identify lake trout spawning locations are time- and labor-intensive and spatially limited. Due to the observation that some lake trout spawning sites are relatively clean of...
Authors
Amanda G. Grimm, Colin N. Brooks, Thomas R. Binder, Stephen C. Riley, Steve A. Farha, Robert A. Shuchman, Charles C. Krueger
Status of pelagic prey fishes in Lake Michigan, 2015 Status of pelagic prey fishes in Lake Michigan, 2015
Acoustic surveys were conducted in late summer/early fall during the years 1992-1996 and 2001-2015 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 2015...
Authors
David M. Warner, Randall M. Claramunt, Steve A. Farha, Dale Hanson, Timothy J. Desorcie, Timothy P. O’Brien
Status and trends of the Lake Huron offshore demersal fish community, 1976-2012 Status and trends of the Lake Huron offshore demersal fish community, 1976-2012
The USGS Great Lakes Science Center has conducted trawl surveys to assess annual changes in the offshore demersal fish community of Lake Huron since 1973. Sample sites include five ports in U.S. waters with less frequent sampling near Goderich, Ontario. The 2012 fall bottom trawl survey was carried out between 20 October – 5 November 2012 and included all U.S. ports as well as Goderich...
Authors
Edward F. Roseman, Stephen C. Riley, Steve A. Farha, Bryan M. Maitland, Taaja R. Tucker, Stacy A. Provo, Matthew W. McLean
Status and trends of pelagic prey fish in Lake Huron, 2013 Status and trends of pelagic prey fish in Lake Huron, 2013
The USGS Great Lakes Science Center (GLSC) conducted acoustic and midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2013. The 2013 survey was conducted during September and October and included transects in Lake Huron’s main basin, Georgian Bay, and North Channel. Pelagic fish density was 1,033 fish/ha in 2013 and increased 62% over the 2012 estimate. Total...
Authors
Timothy P. O’Brien, David M. Warner, Steve A. Farha, Darryl W. Hondorp, Lisa A. Kaulfersch, Nicole M. Watson
Status and trends of pelagic prey fishes in Lake Huron, 2012 Status and trends of pelagic prey fishes in Lake Huron, 2012
The USGS Great Lakes Science Center (GLSC) conducted acoustic/midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2012. The 2012 survey was conducted during September and October, and included transects in Lake Huron’s Main Basin, Georgian Bay, and North Channel. Pelagic fish density (638 fish/ha) was lower in 2012 compared to 2011, with density in 2012 only 34% of...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Jeff Schaeffer, Stephen Lenart
Status and trends of pelagic prey fishes in Lake Huron, 2012 Status and trends of pelagic prey fishes in Lake Huron, 2012
The USGS Great Lakes Science Center (GLSC) conducted acoustic/midwater trawl surveys of Lake Huron during 1997 and annually during 2004-2012. The 2012 survey was conducted during September and October, and included transects in Lake Huron’s Main Basin, Georgian Bay, and North Channel. Pelagic fish density (638 fish/ha) was lower in 2012 compared to 2011, with density in 2012 only 34% of...
Authors
David M. Warner, Timothy P. O’Brien, Steve A. Farha, Jeff Schaeffer, Stephen Lenart
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
Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008 Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008
The U.S.Geological Survey Great Lakes Science Center has conducted trawl surveys to assess annual changes in the deepwater demersal fish community of Lake Huron since 1973. Since 1992, surveys have been carried out using a 21 m wing trawl towed on-contour at depths ranging from 9 to 110 m on fixed transects. Sample sites include five ports in U.S. waters with less frequent sampling near...
Authors
Edward F. Roseman, Timothy P. O’Brien, Stephen C. Riley, Steve A. Farha, John R. French