نتایج جستجو برای: indian crested porcupine
تعداد نتایج: 70629 فیلتر نتایج به سال:
Side weir is the structure to evacuate extra water from a canal when level of water rises. This structure is mounted on the wall of canal. It is used predominantly to set flow in irrigation and drainage systems or urban wastewater harvesting systems. Implementing guide vanes is a simple way to increase side weir efficiency. In this study, the effect of using guide vanes on discharge and dischar...
To investigate the idea that sexual imprinting creates incipient reproductive isolation between phenotypically diverging populations, I performed experiments to determine whether colony-reared zebra finches would imprint on details of artificial white crests. In the first experiment, adults in one breeding colony wore white crests with a vertical black stripe, while in another colony adults wor...
In species with a high male reproductive skew, competition between males for the top dominant position is high and escalated fights are common between competitors. As a consequence, challenges incur potentially high costs. Selection should favor males who time an alpha male challenge to maximize chances of a successful outcome minimizing costs. Despite the importance of alpha male replacements ...
We report the isolation and characterization of a highly pathogenic avian influenza A/H5N1 virus from Crested Hawk-Eagles smuggled into Europe by air travel. A screening performed in human and avian contacts indicated no dissemination occurred. Illegal movements of birds are a major threat for the introduction of highly pathogenic avian influenza.
Convergent effects of elevation on functional leaf traits within and among species Quentin D. Read*, Leigh C. Moorhead, Nathan G. Swenson, Joseph K. Bailey and Nathan J. Sanders Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Tennessee, 37996 USA; Rocky Mountain Biological Laboratory, Crested Butte, Colorado, 81224 USA; and Department of Plant Biology, Michig...
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