منابع مشابه
CLIFF-NESTING ADAPTATIONS OF THE GALiPAGOS SWALLOW-TAILED GULL1
E CULLEN (1957) showed that the cliff-nesting Black-legged Kittiwake (Larus (Rissa) tridactylus) differs from “typical” (i.e., ground-nesting)‘ gulls in many respects. The species’ unique morphological and behavioral characters, Cullen cogently argued, have resulted from adaptation (either directly or indirectly) to cliff-breeding. Epistemologically, the correlation between cliff-nesting and un...
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چکیده یکی از مهمترین دغدغه های بزرگ جوامع بشری، از دیر باز تا کنون که ذهن پژوهشگران و متخصصان بهداشت روانی و اجتماعی و دولتها رابه خود مشغول داشته، مسأله ی بزهکاری می باشد. شناخت کامل پدیده ی بزهکاری و بزهکار، علل وعوامل سقوط یک انسان، چگونگی درمان وی و درنهایت پیشگیری ازبزهکاری ودریک کلام سالم سازی یک جامعه، رسالت عظیم، انسانی ومقدسی می باشد که با بررسی شخصیت مجرم یعنی[ انسانی که تحت شرای...
15 صفحه اولA model to predict the likelihood of cliff swallow nesting on highway structures in northern California
Cliff swallows (Petrochelidon pyrrhonota) are colonially breeding migratory birds that frequently nest on highway structures. Under the Migratory Bird Treaty Act of 1918, people cannot harm swallows or their active nests. This restriction causes problems and delays for construction and maintenance divisions of many departments of transportation. In planning future projects, it would be useful f...
متن کاملDeterring cliff-swallow nesting on highway structures using bioacoustics and surface modifications
Cliff swallows (Petrochelidon pyrrhonota) are migratory birds that breed in colonies and frequently nest on highway structures. Protected by the Migratory Bird Treaty Act of 1918, swallows in their active nests cannot be harmed by nesting-control methods. This causes problems and delays in maintenance of structures by divisions of many departments of transportation. We evaluated 2 aversion stra...
متن کاملCliff swallows, swallow bugs, and West Nile virus: an unlikely transmission mechanism.
The cliff swallow (Petrochelidon pyrrhonota) could play an important role in the transmission of West Nile virus (WNV) because of its breeding ecology, reservoir competence status, and potentially high natural exposure rates. Cliff swallows nest within colonies and their nests are occupied year-round by swallow bugs (Oeciacus vicarius), hematophagus ectoparasites that feed primarily on cliff sw...
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ژورنال
عنوان ژورنال: The Auk
سال: 1899
ISSN: 0004-8038,1938-4254
DOI: 10.2307/4069371