Temperature and breeding success for Cliff Swallows (Petrochelidon pyrrhonota) nesting on man-made structures: ecological traps?
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Cliff swallows Petrochelidon pyrrhonota as bioindicators of environmental mercury, Cache Creek Watershed, California.
To evaluate mercury (Hg) and other element exposure in cliff swallows (Petrochelidon pyrrhonota), eggs were collected from 16 sites within the mining-impacted Cache Creek watershed, Colusa, Lake, and Yolo counties, California, USA, in 1997-1998. Nestlings were collected from seven sites in 1998. Geometric mean total Hg (THg) concentrations ranged from 0.013 to 0.208 microg/g wet weight (ww) in ...
متن کاملExperimental infection of cliff swallows (Petrochelidon pyrrhonota) with varying doses of West Nile virus.
Cliff swallows (Petrochelidon pyrrhonota) were inoculated with differing doses of West Nile virus (WNV) to evaluate their potential role as reservoir hosts in nature. Swallows often nest in large colonies in habitats and months associated with high mosquito abundance and early WNV transmission in North America. Additionally, cliff swallow diet consists of insects, including mosquitoes, leading ...
متن کاملINTENSE NATURAL SELECTION ON MORPHOLOGY OF CLIFF SWALLOWS (<i>PETROCHELIDON PYRRHONOTA</i>) A DECADE LATER: DID THE POPULATION MOVE BETWEEN ADAPTIVE PEAKS? Sélection naturelle intensive sur la morphologie de <i>Petrochelidon pyrrhonota</i> une décennie pl
—Unusual climatic events often lead to intense natural selection on organisms. Whether episodic selection events result in permanent microevolutionary changes or are reversed by opposing selection pressures at a later time is rarely known, because most studies do not last long enough to witness rare events and document their aftermath. In , unusually cold and wet weather in southwestern Neb...
متن کاملA 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 کاملRock Climbing and Raven Corvus Corax Occurrence Depress Breeding Success of Cliff-nesting Peregrines Falco Peregrinus
In recent decades, raptors have become gradually more protected in almost all European countries, but their decline often persists, due to pollution, habitat alteration and fragmentation, or to human direct/indirect disturbance (Tucker & Heath, 1994). Peregrine Falco peregrinus populations suffered a dramatic decline during the 1950s and 1960s in the boreal hemisphere, following the adoption of...
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ژورنال
عنوان ژورنال: Canadian Journal of Zoology
سال: 2019
ISSN: 0008-4301,1480-3283
DOI: 10.1139/cjz-2018-0224