نتایج جستجو برای: hirundo rustica
تعداد نتایج: 594 فیلتر نتایج به سال:
In altricial [helpless] birds, ectoparasite [external parasite] exposure during development may elicit a costly immune response requiring nestlings to redistribute energy away from growth and development and towards parasite defense. That altricial nestlings are born with an immature immune system may have implications for the mechanisms they use for immune defense. I studied how nestlings defe...
Associations between parasite loads and sexual signal expression have long been the focus of research. However, our understanding how selection operates in context multiple infections within same host is still quite limited. We examined plumage coloration, which sexually selected North American barn swallows, Hirundo rustica erythrogaster, tail streamer length, other swallow subspecies, eight d...
Harmful algal blooms (HABs), caused primarily by nutrient input from agricultural runoff, are a threat to freshwater systems worldwide, and further predicted increase in size, frequency, intensity due climate change. HABs occur annually the Western Basin of Lake Erie (Ohio, USA), these become toxic when dominated cyanobacteria that produce liver toxin microcystin. Although we making substantial...
Based on historical interpretations of the Sūrat al-Fīl, the 105th Meccan Sura of the Qur’an, an epidemic occurred near Mecca circa 570 CE (Common Era), the Year of the Elephant in Islamic history. The five verses of the Sura are thought to be an allegorical description of the “Elephant War epidemic”, so named because invading Axumite (Ethiopian) forces from present-day Yemen included one or mo...
Dispersal affects the distribution, dynamics and genetic structure of natural populations, and can be significantly different between sexes. However, literature records dealing with the dispersal of migratory birds are scarce, as migratory behaviour can notably complicate the study of dispersal. We used the barn swallow Hirundo rustica as model taxon to investigate patterns of genetic variabili...
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