نتایج جستجو برای: host density
تعداد نتایج: 616880 فیلتر نتایج به سال:
The evolutionary diversi®cation of living organisms is a central research theme in evolutionary ecology, and yet it remains dicult to infer the action of evolutionary processes from patterns in the distribution of rates of diversi®cation among related taxa. Using data from helminth parasite communities in 76 species of birds and 114 species of mammals, the in ̄uence of four factors that may eit...
In the United States and several other countries, the development of population viability analyses (PVA) is a legal requirement of any species survival plan developed for threatened and endangered species. Despite the importance of pathogens in natural populations, little attention has been given to host–pathogen dynamics in PVA. To study the effect of infectious pathogens on extinction risk es...
Giardia is a highly prevalent, understudied protistan parasite causing significant diarrheal disease worldwide. Its life cycle consists of two stages: infectious cysts ingested from contaminated food or water sources, and motile trophozoites that colonize and attach to the gut epithelium, later encysting to form new cysts that are excreted into the environment. Current understanding of parasite...
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