John M. Pearce, Ph.D. (Former Employee)
Science and Products
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Effects of implanted radio transmitters with percutaneous antennas on the behavior of Canada Geese Effects of implanted radio transmitters with percutaneous antennas on the behavior of Canada Geese
We examined whether surgically-implanted radio transmitters with percutaneous antennas affected behavior of Lesser Canada Geese (Branta canadensis parvipes) in Anchorage, Alaska. We implanted either a 26-g VHF radio transmitter or a larger VHF radio that was the same mass (35 g) and shape as a satellite transmitter in the coelom of adult females captured during molt in 2000. A control...
Authors
Jerry W. Hupp, G.A. Ruhl, John M. Pearce, Daniel M. Mulcahy, M.A. Tomeo
Molecular status of the dusky Canada goose (Branta canadensis occidentalis): A genetic assessment of a translocation effort Molecular status of the dusky Canada goose (Branta canadensis occidentalis): A genetic assessment of a translocation effort
Until recently, the dusky Canada goose (Branta canadensis occidentalis) was managedas one breeding population from the CopperRiver Delta (CRD), Alaska. Population numberson the CRD have declined precipitously over thelast three decades, due in part to changes inhabitat. In 1981, a pair of Canada geese,presumably B.c. occidentalis, wasreported nesting on Middleton Island (MID), inthe Gulf...
Authors
Sandra L. Talbot, John M. Pearce, Barbara J. Pierson, Dirk V. Derksen, Kim T. Scribner
Morphological traits of Pacific Flyway Canada Geese as an aid to subspecies identification and management Morphological traits of Pacific Flyway Canada Geese as an aid to subspecies identification and management
Subspecies of Canada Geese (Branta canadensis) exhibit wide variation in body size across their range. To monitor harvest levels in the Pacific Flyway, biologists commonly use culmen length and plumage color to differentiate among subspecies on sympatric wintering grounds. Among the four large-bodied Pacific subspecies (B. c. parvipes, B. c. occidentalis, B. c. fulva, and B. c. moffitti)...
Authors
John M. Pearce, Karen S. Bollinger
First record of a Greater Shearwater (Puffinus gravis) in Alaska First record of a Greater Shearwater (Puffinus gravis) in Alaska
The Greater Shearwater (Puffinus gravis) breeds in the southern Atlantic Ocean and disperses after breeding to the North Atlantic. On 3 August 2001, I observed and photographed an unidentified shearwater (Figure 1) in the Gulf of Alaska, about 30 km off the southern coast of Montague Island (59°50' N, 148°00' W). The bird was subsequently identified as a Greater Shearwater. This...
Authors
John M. Pearce
Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance
Genetic markers that differ in mode of inheritance and rate of evolution (a sex-linked Z-specific microsatellite locus, five biparentally inherited microsatellite loci, and maternally inherited mitochondrial [mtDNA] sequences) were used to evaluate the degree of spatial genetic structuring at macro- and microgeographic scales, among breeding regions and local nesting populations within...
Authors
Kim T. Scribner, Margaret R. Petersen, Raymond L. Fields, Sandra L. Talbot, John M. Pearce, Ronald K. Chesser
Molecular genetic status of Aleutian Canada Geese from Buldir and the Semidi Islands, Alaska Molecular genetic status of Aleutian Canada Geese from Buldir and the Semidi Islands, Alaska
We conducted genetic analyses of Aleutian Canada Geese (Branta canadensis leucopareia) from Buldir Island in the western Aleutians and the Semidi Islands in the eastern portion of their breeding range. We compared data from seven microsatellite DNA loci and 143 base pairs of the control region of mitochondrial DNA from the two populations of Aleutian Canada Geese and another small-bodied
Authors
Barbara J. Pierson, John M. Pearce, Sandra L. Talbot, Gerald F. Shields, Kim T. Scribner
Science and Products
Filter Total Items: 42
Filter Total Items: 29
No results found.
Filter Total Items: 80
Effects of implanted radio transmitters with percutaneous antennas on the behavior of Canada Geese Effects of implanted radio transmitters with percutaneous antennas on the behavior of Canada Geese
We examined whether surgically-implanted radio transmitters with percutaneous antennas affected behavior of Lesser Canada Geese (Branta canadensis parvipes) in Anchorage, Alaska. We implanted either a 26-g VHF radio transmitter or a larger VHF radio that was the same mass (35 g) and shape as a satellite transmitter in the coelom of adult females captured during molt in 2000. A control...
Authors
Jerry W. Hupp, G.A. Ruhl, John M. Pearce, Daniel M. Mulcahy, M.A. Tomeo
Molecular status of the dusky Canada goose (Branta canadensis occidentalis): A genetic assessment of a translocation effort Molecular status of the dusky Canada goose (Branta canadensis occidentalis): A genetic assessment of a translocation effort
Until recently, the dusky Canada goose (Branta canadensis occidentalis) was managedas one breeding population from the CopperRiver Delta (CRD), Alaska. Population numberson the CRD have declined precipitously over thelast three decades, due in part to changes inhabitat. In 1981, a pair of Canada geese,presumably B.c. occidentalis, wasreported nesting on Middleton Island (MID), inthe Gulf...
Authors
Sandra L. Talbot, John M. Pearce, Barbara J. Pierson, Dirk V. Derksen, Kim T. Scribner
Morphological traits of Pacific Flyway Canada Geese as an aid to subspecies identification and management Morphological traits of Pacific Flyway Canada Geese as an aid to subspecies identification and management
Subspecies of Canada Geese (Branta canadensis) exhibit wide variation in body size across their range. To monitor harvest levels in the Pacific Flyway, biologists commonly use culmen length and plumage color to differentiate among subspecies on sympatric wintering grounds. Among the four large-bodied Pacific subspecies (B. c. parvipes, B. c. occidentalis, B. c. fulva, and B. c. moffitti)...
Authors
John M. Pearce, Karen S. Bollinger
First record of a Greater Shearwater (Puffinus gravis) in Alaska First record of a Greater Shearwater (Puffinus gravis) in Alaska
The Greater Shearwater (Puffinus gravis) breeds in the southern Atlantic Ocean and disperses after breeding to the North Atlantic. On 3 August 2001, I observed and photographed an unidentified shearwater (Figure 1) in the Gulf of Alaska, about 30 km off the southern coast of Montague Island (59°50' N, 148°00' W). The bird was subsequently identified as a Greater Shearwater. This...
Authors
John M. Pearce
Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance Sex-biased gene flow in spectacled eiders (Anatidae): Inferences from molecular markers with contrasting modes of inheritance
Genetic markers that differ in mode of inheritance and rate of evolution (a sex-linked Z-specific microsatellite locus, five biparentally inherited microsatellite loci, and maternally inherited mitochondrial [mtDNA] sequences) were used to evaluate the degree of spatial genetic structuring at macro- and microgeographic scales, among breeding regions and local nesting populations within...
Authors
Kim T. Scribner, Margaret R. Petersen, Raymond L. Fields, Sandra L. Talbot, John M. Pearce, Ronald K. Chesser
Molecular genetic status of Aleutian Canada Geese from Buldir and the Semidi Islands, Alaska Molecular genetic status of Aleutian Canada Geese from Buldir and the Semidi Islands, Alaska
We conducted genetic analyses of Aleutian Canada Geese (Branta canadensis leucopareia) from Buldir Island in the western Aleutians and the Semidi Islands in the eastern portion of their breeding range. We compared data from seven microsatellite DNA loci and 143 base pairs of the control region of mitochondrial DNA from the two populations of Aleutian Canada Geese and another small-bodied
Authors
Barbara J. Pierson, John M. Pearce, Sandra L. Talbot, Gerald F. Shields, Kim T. Scribner