نتایج جستجو برای: to wild populations
تعداد نتایج: 10681020 فیلتر نتایج به سال:
Background and purpose: Wild rats are considered as an important spreading factor of contamination in urban areas. During recent years, the wild rats were extensively distributed in Tehran. Therefore, it is important to investigate the antibiotic resistance of enteric bacteria isolated from rats, because of the possibility of antibiotic resistance transmission to human. The aim of this study ...
the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...
the wild pistachio, pistacia atlantica subsp. mutica, is belonged to mountain of irano-turanian region, and distributed in northwest, northeast, center, east and south of iran. the sexual identification mechanism of this species is unknown and denotation of gender is impossible until flowering. in this study sex ratio of populations of this dioecious shrub was evaluated by several hypothesis co...
carnivores play great ecological roles in ecosystems because of placing on top of the food pyramid. food habits of large carnivores are associated with important ecological features such as spatial pattern, movement, habitat selection, social structure, geographical distribution and reproductive success. accordingly, in this study was used scat analysis to determine the diet of persian leopards...
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