Výsledky vyhledávání - "Kathryn M. Sweeney"

A re-examination of the relationship between Steller sea lion (Eumetopias jubatus) diet and population trend using data from the Aleutian Islands

Autor: Lowell W. Fritz, Dominic J. Tollit, Tonya K. Zeppelin, Edward A. Laman, James R. Thomason, Kathryn M. Sweeney, Katie Luxa, Brian M. Brost, William F. Walker

Publikováno v: Canadian Journal of Zoology. 97:1137-1155

Prey diversity and energy density have been linked to each other and to population trends in many studies of bird and mammal diets. We re-examined these relationships in Steller sea lions (Eumetopias jubatus (Schreber, 1776)) using data collected fro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f60f84e2a577b6201a7f305c6b1d9899
https://doi.org/10.1139/cjz-2018-0329

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Flying beneath the clouds at the edge of the world: using a hexacopter to supplement abundance surveys of Steller sea lions (Eumetopias jubatus) in Alaska

Autor: Wayne L. Perryman, Donald J. LeRoi, Robyn P. Angliss, Lowell W. Fritz, Kathryn M. Sweeney, Tom Gelatt, V. T. Helker

Publikováno v: Journal of Unmanned Vehicle Systems. 4:70-81

Aerial imagery is the most effective method National Marine Fisheries Service (NMFS) uses to assess abundance of Steller sea lions (Eumetopias jubatus). These images are traditionally captured from occupied aircraft, but the long distances between ai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b82f7bc62f3477bb728737eb7a72327
https://doi.org/10.1139/juvs-2015-0010

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AGE-STRUCTURED MODELING REVEALS LONG-TERM DECLINES IN THE NATALITY OF WESTERN STELLER SEA LIONS

Autor: Lowell W. Fritz, Elizabeth E. Holmes, Anne E. York, Kathryn M. Sweeney

Publikováno v: Ecological Applications. 17:2214-2232

Since the mid-1970s, the western Steller sea lion (Eumetopias jubatus), inhabiting Alaskan waters from Prince William Sound west through the Aleutian Islands, has declined by over 80%. Changing oceanographic conditions, competition from fishing opera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f22256121c1dbeeb5d39b59f0d7b8955
https://doi.org/10.1890/07-0508.1

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