نتایج جستجو برای: canada ursus 16
تعداد نتایج: 404318 فیلتر نتایج به سال:
We present a comprehensive look at a sample of bear spray incidents that occurred in Alaska, USA, from 1985 to 2006. We analyzed 83 bear spray incidents involving brown bears (Ursus arctos; 61 cases, 74%), black bears (Ursus americanus; 20 cases, 24%), and polar bears (Ursus maritimus; 2 cases, 2%). Of the 72 cases where persons sprayed bears to defend themselves, 50 (69%) involved brown bears,...
To determine the extent of phylogeographic structuring in North American black bear (Ursus americanus) populations, we examined mitochondrial DNA sequences (n = 118) and restriction fragment length polymorphism profiles (n = 258) in individuals from 16 localities. Among the bears examined, 19 lineages falling into two highly divergent clades were identified. The clades differ at 5.0% of nucleot...
Sam B. Coggins 5 Department of Forest Resources Management, University of British Columbia, 6 Vancouver, Canada. 7 8 Nicholas C. Coops (*) 9 Department of Forest Resources Management, University of British Columbia, 10 Vancouver, Canada. 11 12 Thomas Hilker 13 NASA Goddard Space Flight Center. Biospheric Sciences Branch Code 618. Greenbelt 14 Maryland, USA. 15 16 Michael A. Wulder 17 Canadian F...
Although there have been few attempts to systematically analyze information on the use of deterrents polar bears (Ursus maritimus), understanding their effectiveness in mitigating human-polar bear conflicts is critical ensuring both human safety and conservation. To fill this knowledge gap, we analyzed 19 incidents involving spray free-ranging from 1986 2019 Canada, Russia, United States evalua...
The allelic diversity of the DRB locus in major histocompatibility complex (MHC) genes was analyzed in the brown bear (Ursus arctos) from the Hokkaido Island of Japan, Siberia, and Kodiak of Alaska. Nineteen alleles of the DRB exon 2 were identified from a total of 38 individuals of U. arctos and were highly polymorphic. Comparisons of non-synonymous and synonymous substitutions in the antigen-...
We provide an expansive analysis of polar bear (Ursus maritimus) circumpolar genetic variation during the last two decades of decline in their sea-ice habitat. We sought to evaluate whether their genetic diversity and structure have changed over this period of habitat decline, how their current genetic patterns compare with past patterns, and how genetic demography changed with ancient fluctuat...
خیار از جمله میوه های پرمصرف دنیاست که تولید سالیانه آن بالغ بر 40 میلیون تن است. تولید خیار ایران بیش از 1.6 میلیون تن در سال و میزان صادرات آن 27000 تن می باشد. تولید خیار به دو صورت گلخانه ای و مزرعه ای است. با توجه به تولید غیر گلخانه ای و صادرات خیار و اینکه با درجه بندی کردن محصول می توان بهره وری را افزایش داد، در این تحقیق درجه بندی خیار مدنظر قرار گرفت. معیارهای درجه بندی عبارتند از: ط...
Alexandre Blais* and Alexandre M. Zagoskin Département de Physique and Centre de Recherche en Physique du Solide, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1 DWS Inc., 119-1600 West 6th Avenue, Vancouver, British Columbia, Canada V6J 1R3 Physics and Astronomy Department, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1 ~Receive...
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