منابع مشابه
The design and function of birds' nests
All birds construct nests in which to lay eggs and/or raise offspring. Traditionally, it was thought that natural selection and the requirement to minimize the risk of predation determined the design of completed nests. However, it is becoming increasingly apparent that sexual selection also influences nest design. This is an important development as while species such as bowerbirds build struc...
متن کاملLivestock grazing and trampling of birds’ nests: an experiment using artificial nests
The purpose of this study is to experimentally determine the differences between four grazing treatments on the trampling of nests. Additionally, we examine to what extent the trampling probability of nests is higher close to a source of fresh water. We compare the trampling of artificial nests in five different grazing treatments in an experimental design. We use buried clay pigeon targets as ...
متن کاملResponses of Birds to Broken Eggs in Their Nests’
We tested the responses of two bird species which nest on unmovable substrates (e.g., cavities and walls) to simulated and actual egg damage in their nest. Tree Swallows (Tachvcineta bicolor) and Barn Swallows (Hit-undo ruiticaj removed broken eggs and continued to incubate the rest of their clutch, but rcsponse times took up to 8 days, and observed rejection rates were lower than reported for ...
متن کاملDetecting Camouflaged Content Polluters
The connectivity and openness of the Internet have cultivated a blistering expansion of online media websites. However, the culture of openness also makes the emerging platforms an effective channel for content pollution, such as fraud, phishing, and other online abuses. To complicate the problem, content polluters actively manipulate the characteristics of the Internet through establishing lin...
متن کاملPolyethylene Glycol Camouflaged Earthworm Hemoglobin
Nearly 21 million components of blood and whole blood and transfused annually in the United States, while on average only 13.6 million units of blood are donated. As the demand for Red Blood Cells (RBCs) continues to increase due to the aging population, this deficit will be more significant. Despite decades of research to develop hemoglobin (Hb) based oxygen (O2) carriers (HBOCs) as RBC substi...
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ژورنال
عنوان ژورنال: The Auk
سال: 2015
ISSN: 0004-8038,1938-4254
DOI: 10.1642/auk-14-77.1