Joseph Fleskes (Former Employee)
Science and Products
Filter Total Items: 101
Flightless and post-molt survival and movements of female mallards molting in Klamath Basin Flightless and post-molt survival and movements of female mallards molting in Klamath Basin
Flightless and post-molt survival and movements were studied during August-May, 2001-2002, 2002- 2003 and 2006-2007 for 181 adult female Mallards (Anas platyrhynchos). Birds were radiotagged just before or early in their flightless period on four wetlands that differed in size on Klamath Basin (KB) National Wildlife Refuge complex. Flightless survival varied among years but was higher on...
Authors
Joseph P. Fleskes, David M. Mauser, Julie L. Yee, David S. Blehert, Gregory S. Yarris
Emergent insect production in post-harvest flooded agricultural fields used by waterbirds Emergent insect production in post-harvest flooded agricultural fields used by waterbirds
California’s Tulare Lake Basin (TLB) is one of the most important waterbird areas in North America even though most wetlands there have been converted to cropland. To guide management programs promoting waterbird beneficial agriculture, which includes flooding fields between growing periods, we measured emergence rates of insects, an important waterbird food, in three crop types (tomato...
Authors
Richard C. Moss, Steven C. Blumenshine, Julie Yee, Joseph P. Fleskes
Ecology of Greater Sage-Grouse in the Bi-State Planning Area Final Report, September 2007 Ecology of Greater Sage-Grouse in the Bi-State Planning Area Final Report, September 2007
Conservation efforts for greater sage-grouse (Centrocercus urophasianus), hereafter sage-grouse, are underway across the range of this species. Over 70 local working groups have been established and are implementing on-the-ground sage-grouse oriented conservation projects. Early on in this process, the California Department of Fish and Game (CDFG) recognized the need to join in these...
Authors
Michael L. Casazza, Cory T. Overton, Melissa A. Farinha, Alicia A. Torregrosa, Joseph P. Fleskes, Michael R. Miller, James S. Sedinger, Eric J. Kolada
Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California
The global redistribution of pathogens, such as highly pathogenic avian influenza, has renewed interest in the connectivity of continental populations of birds. Populations of the Northern Pintail (Anas acuta) wintering in Japan and California are considered separate from a management perspective. We used data from band recoveries and population genetics to assess the degree of...
Authors
Paul L. Flint, Kiyoaki Ozaki, John M. Pearce, Brian Guzzetti, Hiroyoshi Higuchi, Joseph P. Fleskes, Tetsuo Shimada, Dirk V. Derksen
Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America
Although continental populations of avian influenza viruses are genetically distinct, transcontinental reassortment in low pathogenic avian influenza (LPAI) viruses has been detected in migratory birds. Thus, genomic analyses of LPAI viruses could serve as an approach to prioritize species and regions targeted by North American surveillance activities for foreign origin highly pathogenic...
Authors
John M. Pearce, Andrew M. Ramey, Paul L. Flint, Anson V. Koehler, Joseph P. Fleskes, J. Christian Franson, Jeffrey S. Hall, Dirk V. Derksen, S. Ip
Pintail and mallard survival in California relative to habitat, abundance, and hunting Pintail and mallard survival in California relative to habitat, abundance, and hunting
The influence of habitat, waterfowl abundance, and hunting on winter survival of waterfowl is not well understood. We studied late August-March survival of 163 after-hatch-year (AHY) and 128 hatch-year (HY) female mallards (Anas platyrhynchos) radiotagged in Sacramento Valley (SACV) and 885 AHY female northern pintails (A. acuta) radiotagged throughout the Central Valley of California...
Authors
J. P. Fleskes, J.L. Yee, G.S. Yarris, M. R. Miller, Michael L. Casazza
Waterfowl distribution and abundance during spring migration in Southern Oregon and Northeastern California Waterfowl distribution and abundance during spring migration in Southern Oregon and Northeastern California
We used aerial surveys to study abundance and distribution of waterfowl (ducks, geese, swans, and coots) during spring in southern Oregon and northeastern California (SONEC). Total waterfowl-use days in SONEC during the 119-day, 5 January-3 May, spring period was similar during 2002 (127,977,700) and 2003 (128,076,200) and averaged 1,075,900 birds per day (bpd); these estimates should be...
Authors
J. P. Fleskes, J.L. Yee
Spring migration of Northern Pintails from Texas and New Mexico, USA Spring migration of Northern Pintails from Texas and New Mexico, USA
We used satellite transmitters (platform transmitting terminals or PTTs) during 2002 and 2003 to document spring migration timing, routes, stopover sites, and nesting sites of adult female Northern Pintails (Anas acuta) from major wintering areas of the Gulf Coast (N = 20) and Playa Lakes Regions (PLR, N = 20) in Texas, and the Middle Rio Grande Valley, New Mexico (MRGV, N = 15). Some...
Authors
D.A. Haukos, M. R. Miller, D.L. Orthmeyer, John Y. Takekawa, J. P. Fleskes, Michael L. Casazza, W.M. Perry, J.A. Moon
Spatial use by wintering greater white-fronted geese relative to a decade of habitat change in California's Central Valley Spatial use by wintering greater white-fronted geese relative to a decade of habitat change in California's Central Valley
We investigated the effect of recent habitat changes in California's Central Valley on wintering Pacific greater white-fronted geese (Anser albifrons frontalis) by comparing roost-to-feed distances, distributions, population range sizes, and habitat use during 1987-1990 and 1998-2000. These habitat changes included wetland restoration and agricultural land enhancement due to the 1990
Authors
Joshua T. Ackerman, John Y. Takekawa, D.L. Orthmeyer, J. P. Fleskes, J.L. Yee, K.L. Kruse
Waterfowl distribution, movements, and habitat use relative to recent habitat changes in the Central Valley of California: A cooperative project to investigate impacts of the Central Valley Joint Venture and changing agricultural practices on the ecology Waterfowl distribution, movements, and habitat use relative to recent habitat changes in the Central Valley of California: A cooperative project to investigate impacts of the Central Valley Joint Venture and changing agricultural practices on the ecology
No abstract available at this time
Authors
J. P. Fleskes, J.L. Yee, Michael L. Casazza, M. R. Miller, John Y. Takekawa, D.L. Orthmeyer
Spring migration of northern pintails from California's Central Valley wintering area tracked by satellite telemetry: Routes, timing, and destinations Spring migration of northern pintails from California's Central Valley wintering area tracked by satellite telemetry: Routes, timing, and destinations
We used satellite transmitters to track the 2000–2003 spring migrations of adult female Northern Pintails (Anas acuta L., 1758) from California's Central Valley, USA. PTT-tagged Pintails departed during late February to mid-March, and 77%–87% stopped first in the region of south-central Oregon, extreme northwestern Nevada, and northeastern California (SONEC). Subsequently, most Pintails...
Authors
M. R. Miller, John Y. Takekawa, J. P. Fleskes, D.L. Orthmeyer, Michael L. Casazza, W.M. Perry
Flight speeds of northern pintails during migration determined by satellite telemetry Flight speeds of northern pintails during migration determined by satellite telemetry
Speed (km/hr) during flight is one of several factors determining the rate of migration (km/ day) and flight range of birds. We attached 26-g, back-mounted satellite-received radio tags (platform transmitting terminals; PTTs) to adult female Northern Pintails (Anas acuta) during (1) midwinter 2000–2003 in the northern Central Valley of California, (2) fall and winter 2002–2003 in the...
Authors
Michael R. Miller, John Y. Takekawa, Joseph P. Fleskes, Dennis L. Orthmeyer, Michael L. Casazza, David A. Haukos, William M. Perry
Science and Products
Filter Total Items: 101
Flightless and post-molt survival and movements of female mallards molting in Klamath Basin Flightless and post-molt survival and movements of female mallards molting in Klamath Basin
Flightless and post-molt survival and movements were studied during August-May, 2001-2002, 2002- 2003 and 2006-2007 for 181 adult female Mallards (Anas platyrhynchos). Birds were radiotagged just before or early in their flightless period on four wetlands that differed in size on Klamath Basin (KB) National Wildlife Refuge complex. Flightless survival varied among years but was higher on...
Authors
Joseph P. Fleskes, David M. Mauser, Julie L. Yee, David S. Blehert, Gregory S. Yarris
Emergent insect production in post-harvest flooded agricultural fields used by waterbirds Emergent insect production in post-harvest flooded agricultural fields used by waterbirds
California’s Tulare Lake Basin (TLB) is one of the most important waterbird areas in North America even though most wetlands there have been converted to cropland. To guide management programs promoting waterbird beneficial agriculture, which includes flooding fields between growing periods, we measured emergence rates of insects, an important waterbird food, in three crop types (tomato...
Authors
Richard C. Moss, Steven C. Blumenshine, Julie Yee, Joseph P. Fleskes
Ecology of Greater Sage-Grouse in the Bi-State Planning Area Final Report, September 2007 Ecology of Greater Sage-Grouse in the Bi-State Planning Area Final Report, September 2007
Conservation efforts for greater sage-grouse (Centrocercus urophasianus), hereafter sage-grouse, are underway across the range of this species. Over 70 local working groups have been established and are implementing on-the-ground sage-grouse oriented conservation projects. Early on in this process, the California Department of Fish and Game (CDFG) recognized the need to join in these...
Authors
Michael L. Casazza, Cory T. Overton, Melissa A. Farinha, Alicia A. Torregrosa, Joseph P. Fleskes, Michael R. Miller, James S. Sedinger, Eric J. Kolada
Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California Breeding-season sympatry facilitates genetic exchange among allopatric wintering populations of Northern Pintails in Japan and California
The global redistribution of pathogens, such as highly pathogenic avian influenza, has renewed interest in the connectivity of continental populations of birds. Populations of the Northern Pintail (Anas acuta) wintering in Japan and California are considered separate from a management perspective. We used data from band recoveries and population genetics to assess the degree of...
Authors
Paul L. Flint, Kiyoaki Ozaki, John M. Pearce, Brian Guzzetti, Hiroyoshi Higuchi, Joseph P. Fleskes, Tetsuo Shimada, Dirk V. Derksen
Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America Avian influenza at both ends of a migratory flyway: characterizing viral genomic diversity to optimize surveillance plans for North America
Although continental populations of avian influenza viruses are genetically distinct, transcontinental reassortment in low pathogenic avian influenza (LPAI) viruses has been detected in migratory birds. Thus, genomic analyses of LPAI viruses could serve as an approach to prioritize species and regions targeted by North American surveillance activities for foreign origin highly pathogenic...
Authors
John M. Pearce, Andrew M. Ramey, Paul L. Flint, Anson V. Koehler, Joseph P. Fleskes, J. Christian Franson, Jeffrey S. Hall, Dirk V. Derksen, S. Ip
Pintail and mallard survival in California relative to habitat, abundance, and hunting Pintail and mallard survival in California relative to habitat, abundance, and hunting
The influence of habitat, waterfowl abundance, and hunting on winter survival of waterfowl is not well understood. We studied late August-March survival of 163 after-hatch-year (AHY) and 128 hatch-year (HY) female mallards (Anas platyrhynchos) radiotagged in Sacramento Valley (SACV) and 885 AHY female northern pintails (A. acuta) radiotagged throughout the Central Valley of California...
Authors
J. P. Fleskes, J.L. Yee, G.S. Yarris, M. R. Miller, Michael L. Casazza
Waterfowl distribution and abundance during spring migration in Southern Oregon and Northeastern California Waterfowl distribution and abundance during spring migration in Southern Oregon and Northeastern California
We used aerial surveys to study abundance and distribution of waterfowl (ducks, geese, swans, and coots) during spring in southern Oregon and northeastern California (SONEC). Total waterfowl-use days in SONEC during the 119-day, 5 January-3 May, spring period was similar during 2002 (127,977,700) and 2003 (128,076,200) and averaged 1,075,900 birds per day (bpd); these estimates should be...
Authors
J. P. Fleskes, J.L. Yee
Spring migration of Northern Pintails from Texas and New Mexico, USA Spring migration of Northern Pintails from Texas and New Mexico, USA
We used satellite transmitters (platform transmitting terminals or PTTs) during 2002 and 2003 to document spring migration timing, routes, stopover sites, and nesting sites of adult female Northern Pintails (Anas acuta) from major wintering areas of the Gulf Coast (N = 20) and Playa Lakes Regions (PLR, N = 20) in Texas, and the Middle Rio Grande Valley, New Mexico (MRGV, N = 15). Some...
Authors
D.A. Haukos, M. R. Miller, D.L. Orthmeyer, John Y. Takekawa, J. P. Fleskes, Michael L. Casazza, W.M. Perry, J.A. Moon
Spatial use by wintering greater white-fronted geese relative to a decade of habitat change in California's Central Valley Spatial use by wintering greater white-fronted geese relative to a decade of habitat change in California's Central Valley
We investigated the effect of recent habitat changes in California's Central Valley on wintering Pacific greater white-fronted geese (Anser albifrons frontalis) by comparing roost-to-feed distances, distributions, population range sizes, and habitat use during 1987-1990 and 1998-2000. These habitat changes included wetland restoration and agricultural land enhancement due to the 1990
Authors
Joshua T. Ackerman, John Y. Takekawa, D.L. Orthmeyer, J. P. Fleskes, J.L. Yee, K.L. Kruse
Waterfowl distribution, movements, and habitat use relative to recent habitat changes in the Central Valley of California: A cooperative project to investigate impacts of the Central Valley Joint Venture and changing agricultural practices on the ecology Waterfowl distribution, movements, and habitat use relative to recent habitat changes in the Central Valley of California: A cooperative project to investigate impacts of the Central Valley Joint Venture and changing agricultural practices on the ecology
No abstract available at this time
Authors
J. P. Fleskes, J.L. Yee, Michael L. Casazza, M. R. Miller, John Y. Takekawa, D.L. Orthmeyer
Spring migration of northern pintails from California's Central Valley wintering area tracked by satellite telemetry: Routes, timing, and destinations Spring migration of northern pintails from California's Central Valley wintering area tracked by satellite telemetry: Routes, timing, and destinations
We used satellite transmitters to track the 2000–2003 spring migrations of adult female Northern Pintails (Anas acuta L., 1758) from California's Central Valley, USA. PTT-tagged Pintails departed during late February to mid-March, and 77%–87% stopped first in the region of south-central Oregon, extreme northwestern Nevada, and northeastern California (SONEC). Subsequently, most Pintails...
Authors
M. R. Miller, John Y. Takekawa, J. P. Fleskes, D.L. Orthmeyer, Michael L. Casazza, W.M. Perry
Flight speeds of northern pintails during migration determined by satellite telemetry Flight speeds of northern pintails during migration determined by satellite telemetry
Speed (km/hr) during flight is one of several factors determining the rate of migration (km/ day) and flight range of birds. We attached 26-g, back-mounted satellite-received radio tags (platform transmitting terminals; PTTs) to adult female Northern Pintails (Anas acuta) during (1) midwinter 2000–2003 in the northern Central Valley of California, (2) fall and winter 2002–2003 in the...
Authors
Michael R. Miller, John Y. Takekawa, Joseph P. Fleskes, Dennis L. Orthmeyer, Michael L. Casazza, David A. Haukos, William M. Perry