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695 results on '"Winker, Kevin"'

151. Rarity of influenza a virus in spring shorebirds, Southern Alaska

Author

Winker, Kevin, Spackman, Erica, and Swayne, David E.

Subjects
Avian influenza -- Risk factors, Avian influenza -- Control, Avian influenza -- Research, Epidemiology -- Research, Shore birds -- Health aspects
Abstract

To the Editor: Knowledge of avian influenza (AI) virus and its host epidemiology and ecology is essential for effective monitoring and mitigation (1). Applicability of global and continental-scale models will [...]

Published
2008

159. Letters

Author

Hutchins, Michael, Wiese, Robert, Willis, Kevin, Balmford, Andrew, Mace, Georgina, Leader-Williams, N., Grant, C. Val, and Winker, Kevin

Published
1997

166. Timing of Breeding Range Occupancy Among High-latitude Passerine Migrants

Author

BENSON, ANNA-MARIE and WINKER, KEVIN

Subjects
Passeriformes -- Behavior, Birds -- Breeding, Biological sciences
Abstract

The brief subarctic summer limits the time available for birds to complete their reproductive activities, yet the temporal requirements of high-latitude passerine migrants are not well understood. Our analyses examined the timing of spring and autumn migration among 18 passerine species to obtain indirect estimates of the time they occupy their breeding ranges in northwestern North America. From 1992 to 1998, the Alaska Bird Observatory (64 [degrees] 50'N, 147 [degrees] 50'W) banded 31,698 individuals during the most intensive standardized mist-netting study ever conducted in subarctic North America. Among the migrants examined, the estimated number of days that species were present in interior Alaska ranged from 48 days for adult Alder Flycatchers (Empidonax alnorum) to 129 days for American Robins (Turdus migratorius). Adults departed significantly later in autumn than immatures in 10 of 18 species we examined and significantly earlier than immatures in only one species, Alder Flycatcher. Breeding range occupancy of Nearctic--Neotropic migrants occurs in this region within the range of average frost-free temperatures in Fairbanks, Alaska, and is significantly shorter in duration than among Nearctic-Nearctic ('short-distance') migrants at this latitude.

Published
2001

170. Adapterama I: Universal stubs and primers for 384 unique dual-indexed or 147,456 combinatorially-indexed Illumina libraries (iTru & iNext)

Author

Glenn, Travis C., primary, Nilsen, Roger A., additional, Kieran, Troy J., additional, Sanders, Jon G., additional, Bayona-Vásquez, Natalia J., additional, Finger, John W., additional, Pierson, Todd W., additional, Bentley, Kerin E., additional, Hoffberg, Sandra L., additional, Louha, Swarnali, additional, García-De León, Francisco J., additional, Del Río-Portilla, Miguel Angel, additional, Reed, Kurt D., additional, Anderson, Jennifer L., additional, Meece, Jennifer K., additional, Aggrey, Samuel E., additional, Rekaya, Romdhane, additional, Alabady, Magdy, additional, Bélanger, Myriam, additional, Winker, Kevin, additional, and Faircloth, Brant C., additional

Published
2016
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175. MITOCHONDRIAL DNA SUGGESTS RECENT ORIGINS OF SUBSPECIES OF THE SHARP-SHINNED HAWK AND GREAT BLUE HERON ENDEMIC TO COASTAL BRITISH COLUMBIA AND SOUTHEAST ALASKA.

Author

CHEEK, REBECCA G., CAMPBELL, KYLE K., WINKER, KEVIN, DICKERMAN, ROBERT W., and WIJDEVEN, BERRY

Abstract

Genetic studies of subspecies endemic to Haida Gwaii (Queen Charlotte Islands) in British Columbia and the Alexander Archipelago of southeast Alaska have frequently found patterns of genetic differentiation corresponding to these phenotypically based taxa. Divergence and speciation are common among island populations of birds, and evidence suggests this region has fostered such divergence during previous glacial maxima. We examined divergence in the mitochondrial gene for NADH dehydrogenase subunit 2 (ND2, a marker used in other studies of regional endemism) in two additional coastal subspecies endemic to this region, of the Sharp-shinned Hawk (Accipiter striatus perobscurus) and Great Blue Heron (Ardea herodias fannini). In both the hawk and heron genetic diversity in ND2 was remarkably low in contrast to that in mitochondrial genes in other species with regional endemics. In both Accipiter striatus perobscurus and Ardea herodias fannini we found only the haplotype most common in continental populations. We found low but significant divergence in frequencies of haplotypes of ND2 between A. s. perobscurus and continental populations of the Sharp-shinned Hawk and no significant population divergence in the Great Blue Heron. In contrast with other regional endemics that do show signals of having persisted through at least one past Ice Age in an unglaciated refugium, these subspecies may have arisen relatively recently, with their adaptation to the local environment leading to darker coloration paralleling that of the region’s older endemics. Alternatively, species-wide selective sweeps of mitochondrial DNA prior to divergence of these taxa may have rendered this genetic marker less useful for tracking divergence arising in a refugium. [ABSTRACT FROM AUTHOR]

Published
2018
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178. Fifty-sixth Supplement to the American Ornithologists' Union:Check-list of North American Birds

Author

Chesser, R. Terry, primary, Banks, Richard C., additional, Burns, Kevin J., additional, Cicero, Carla, additional, Dunn, Jon L., additional, Kratter, Andrew W., additional, Lovette, Irby J., additional, Navarro-Sigüenza, Adolfo G., additional, Rasmussen, Pamela C., additional, Remsen, J. V., additional, Rising, James D., additional, Stotz, Douglas F., additional, and Winker, Kevin, additional

Published
2015
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180. Fifty-Fifth Supplement to the American Ornithologists' UnionCheck-list of North American Birds

Author

Chesser, R. Terry, primary, Banks, Richard C., additional, Cicero, Carla, additional, Dunn, Jon L., additional, Kratter, Andrew W., additional, Lovette, Irby J., additional, Navarro-Sigüenza, Adolfo G., additional, Rasmussen, Pamela C., additional, Remsen, J. V., additional, Rising, James D., additional, Stotz, Douglas F., additional, and Winker, Kevin, additional

Published
2014
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181. Why Museums Matter: Avian Archives in an Age of Extinction

Author

Winker, Kevin

Subjects
Why Museums Matter: Avian Archives in an Age of Extinction (Essay collection) -- Collar, Nigel J. -- Fisher, Clemency T. -- Feare, Christopher J., Books -- Book reviews, Biological sciences
Abstract

WHY MUSEUMS MATTER: AVIAN ARCHIVES IN AN AGE OF EXTINCTION. Edited by Nigel J. Collar, Clemency T. Fisher; and Christopher J. Feare. Bulletin of the British Ornithologists' Club, vol. 123A--Supplement. [...]

Published
2004

187. Small collections make a big impact

Author

Winker, Kevin and Withrow, Jack J.

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

In an era in which support for natural-history collections is waning, we wish to point out how effective even a small, young collection can be. We constructed a Google Scholar [...]

Published
2013

190. Fifty-Fourth Supplement to the American Ornithologists’ UnionCheck-list of North American Birds

Author

Chesser, R. Terry, primary, Banks, Richard C., additional, Barker, F. Keith, additional, Cicero, Carla, additional, Dunn, Jon L., additional, Kratter, Andrew W., additional, Lovette, Irby J., additional, Rasmussen, Pamela C., additional, Remsen, J. V., additional, Rising, James D., additional, Stotz, Douglas F., additional, and Winker, Kevin, additional

Published
2013
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192. High-Latitude Passerine Migrants Overlap Energetically Demanding Events in Autumn.

Author

Benson, Anna-Marie and Winker, Kevin

Subjects
*MIGRATORY birds, *BIRD migration, *BIRD breeding, *YELLOW warbler
Abstract

Temporal constraints on migratory birds to molt, store fat, and migrate in autumn are probably most severe in populations breeding at high latitudes. We examined whether high-latitude time constraints were related to the overlap of these energetically demanding events in migratory passerine species. We also examined how much overlap of molt and fattening occurs within individuals. Data were collected on molt intensity and subcutaneous fat during autumn migration from 1992 to 2004 in Fairbanks, Alaska, (64° 50′ N 147° 50′ W). Among 17 migrant species, we found a negative relationship between length of breeding ground occupancy (number of days between median spring and autumn passage, our measure of time constraints) and the amounts of molt-migration overlap. There was also a positive relationship between molt-fat overlap and distance to wintering range among these 17 species. No individual completely overlapped the peak levels of both molt intensity and fat storage observed within a species, but several individuals approached this theoretical maximum in four species. Molt-fat overlap was highest in an individual Yellow Warbler ( Setophaga petechia) that achieved 70% of the maximum possible overlap of peak fat storage and peak molt intensity for that species. These findings indicate that high-latitude passerines can overlap energetically demanding events during the annual cycle but that there is considerable variation among species in how they juggle time and energy constraints. Our data provide strong support for a conceptual model that passerine migrants breeding at high latitudes use strategies that reduce the time required to complete breeding season activities. In doing so, many of these birds appear to push energetic limits by overlapping molt, migration, and fattening to a degree not previously documented. [ABSTRACT FROM AUTHOR]

Published
2015
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193. INDICATIONS THAT THE COMMON REDPOLL IS DOUBLE BROODED IN ALASKA.

Author

RINGGENBERG, BRANDI and WINKER, KEVIN

Abstract

Successfully rearing two broods in one season (double brooding) is rare at high latitudes, and few well-documented cases exist in the Arctic. There are numerous suggestions in the literature that the Common Redpoll (Acanthis flammed) is occasionally a double-brooded species. We examined banding data sets from interior Alaska, specimens in the University of Alaska Museum bird collection, and Alaska nest-record cards to understand the timing of reproduction in Alaska boreal forest and tundra. In interior Alaska Common Redpolls exhibit characteristics of breeding for over four months, plenty of time to successfully raise two broods. Furthermore, tundra breeding takes place after most boreal forest breeding, making it possible that individuals could rear two broods in different regions, as has been suggested in northern Europe. Finally, pronounced annual variation in production of young in Fairbanks was not correlated with production of tree seeds in the previous summer. [ABSTRACT FROM AUTHOR]

Published
2015

199. Fifty-Second Supplement to the American Ornithologists' Unioncheck-list of North American Birds

Author

Chesser, R. Terry, primary, Banks, Richard C., additional, Barker, F. Keith, additional, Cicero, Carla, additional, Dunn, Jon L., additional, Kratter, Andrew W., additional, Lovette, Irby J., additional, Rasmussen, Pamela C., additional, Remsen, J. V., additional, Rising, James D., additional, Stotz, Douglas F., additional, and Winker, Kevin, additional

Published
2011
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