Joseph Fleskes (Former Employee)
Science and Products
Filter Total Items: 101
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
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