منابع مشابه
Population Demography and Herbivory of Trillium Grandiflorum
Numerous pedicellate and sessile Trillium species are endemic to eastern North America, where white-tailed deer (Odocoileus virginianus) populations have been growing in recent decades. Deer feed on Trillium plants, and because they often consume all leaves and flowers, the photosynthetic capacity of browsed plants is greatly diminished. To determine if deer can influence Trillium population dy...
متن کاملDemography of a forest elephant population
African forest elephants face severe threats from illegal killing for ivory and bushmeat and habitat conversion. Due to their cryptic nature and inaccessible range, little information on the biology of this species has been collected despite its iconic status. Compiling individual based monitoring data collected over 20 years from the Dzanga Bai population in Central African Republic, we summar...
متن کاملDemography of Elder Population in Iran Over the Period 1956 To 2006
Objectives: Ageing and its consequences at the onset of the third millennium is becoming one of the major population-related issues in all countries. Methods & Materials: At present, Iran is undergoing a population transformation from a young age structure to an old age one. Although at the time being the elderly population (60 years and over) is rather small proportion of total population, ...
متن کاملDemography in a new key: A theory of population theory
The widespread opinion that demography is lacking in theory is based in part on a particular view of the nature of scientific theory, generally known as logical empiricism [or positivism]. A newer school of philosophy of science, the model-based view, provides a different perspective on demography, one that enhances its status as a scientific discipline. From this perspective, much of formal de...
متن کاملComparative Demography of an At-Risk African Elephant Population
Knowledge of population processes across various ecological and management settings offers important insights for species conservation and life history. In regard to its ecological role, charisma and threats from human impacts, African elephants are of high conservation concern and, as a result, are the focus of numerous studies across various contexts. Here, demographic data from an individual...
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ژورنال
عنوان ژورنال: Canadian Anaesthetists’ Society Journal
سال: 1982
ISSN: 0008-2856,1496-8975
DOI: 10.1007/bf03009425