Výsledky vyhledávání - "Jeff A Johnson"

Akademický článek

Migratory movements of Atlantic puffins Fratercula arctica naumanni from high Arctic Greenland.

Autor: Kurt K Burnham, Jennifer L Burnham, Jeff A Johnson, Abby Huffman

Publikováno v: PLoS ONE, Vol 16, Iss 5, p e0252055 (2021)

Although the Atlantic puffin Fratercula arctica is well studied throughout its temperate and low Arctic breeding range, few have studied the species in its far northern distribution. This study is the first to present data on the migratory movements

Externí odkaz: https://doaj.org/article/dd2e1f82b88149c3b245a18cfd82ca28

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Akademický článek

Molecular data support Bombus sonorus and Bombus pensylvanicus (Hymenoptera, Apidae) as distinct species

Autor: Jessica L. Beckham, Jeff A. Johnson, Russell S. Pfau

Publikováno v: Journal of Hymenoptera Research, Vol 97, Iss , Pp 895-914 (2024)

Despite their distinctive banding patterns, setal coloration, and geographic ranges, the Sonoran bumble bee (Bombus sonorus Say, 1837) and the American bumble bee (Bombus pensylvanicus De Geer, 1773) are often treated as conspecific, with some author

Externí odkaz: https://doaj.org/article/b1d735339b1b4941b366355e2afb9b8c

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Akademický článek

The use of genetics for the management of a recovering population: temporal assessment of migratory peregrine falcons in North America.

Autor: Jeff A Johnson, Sandra L Talbot, George K Sage, Kurt K Burnham, Joseph W Brown, Tom L Maechtle, William S Seegar, Michael A Yates, Bud Anderson, David P Mindell

Publikováno v: PLoS ONE, Vol 5, Iss 11, p e14042 (2010)

Our ability to monitor populations or species that were once threatened or endangered and in the process of recovery is enhanced by using genetic methods to assess overall population stability and size over time. This can be accomplished most directl

Externí odkaz: https://doaj.org/article/62a35c9476f8410dbb863ddc1da02320

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Akademický článek

It's not too late for the harpy eagle (Harpia harpyja): high levels of genetic diversity and differentiation can fuel conservation programs.

Autor: Heather R L Lerner, Jeff A Johnson, Alec R Lindsay, Lloyd F Kiff, David P Mindell

Publikováno v: PLoS ONE, Vol 4, Iss 10, p e7336 (2009)

BACKGROUND:The harpy eagle (Harpia harpyja) is the largest Neotropical bird of prey and is threatened by human persecution and habitat loss and fragmentation. Current conservation strategies include local education, captive rearing and reintroduction

Externí odkaz: https://doaj.org/article/a1aa7355251b4e119c390711f37fe3a8

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Akademický článek

Whole‐genome survey reveals extensive variation in genetic diversity and inbreeding levels among peregrine falcon subspecies

Autor: Jeff A. Johnson, Giridhar Athrey, Clifford M. Anderson, Douglas A. Bell, Andrew Dixon, Yoshinori Kumazawa, Tom Maechtle, Garrett W. Meeks, David Mindell, Keiya Nakajima, Ben Novak, Sandra Talbot, Clayton White, Xiangjiang Zhan

Publikováno v: Ecology and Evolution, Vol 13, Iss 7, Pp n/a-n/a (2023)

Abstract In efforts to prevent extinction, resource managers are often tasked with increasing genetic diversity in a population of concern to prevent inbreeding depression or improve adaptive potential in a changing environment. The assumption that a

Externí odkaz: https://doaj.org/article/0e5daedba6364d87956e39c45af6294d

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Akademický článek

Reduced reflectance and altered color: The potential cost of external particulate matter accumulation on urban Rock Pigeon (Columba livia) feathers

Autor: Jennifer L. Ellis, Alexandra G. Ponette-González, Matthew Fry, Jeff A. Johnson

Publikováno v: Frontiers in Ecology and Evolution, Vol 11 (2023)

Feather quality in birds is considered an honest signal of individual health as feather appearance and function depend on an individual’s ability to maintain them. In addition to flight and insulation, feathers are essential for social interactions

Externí odkaz: https://doaj.org/article/4e18dc59ee684e6ebe98ac6667bc0212

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