Evolution, Fertility and the Ageing Population
نویسندگان
چکیده
منابع مشابه
Chaotic population dynamics and the evolution of ageing
Problem: Genetic and demographic studies suggest that ageing is an adaptive genetic program, but population genetic analysis indicates that the benefit of ageing to the group is too slow and too diffuse to offset its individual cost. Premise: Demographic homeostasis is a major target of natural selection at the group level, with a strength that can compete with the imperative to higher individu...
متن کاملformation and evolution of regional organizations: the case study of the economic cooperation organization (eco)
abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
15 صفحه اولThe Ageing Population
The process of population ageing that has been occurring in Sweden can be expected to continue during the coming decades, the population pyramid will become increasingly rectangular, and possibly even demonstrate a shrinking base. This will lead to increasing challenges in terms of financing pensions, elderly care and healthcare. These problems will continue for at least the next 30 years with ...
متن کاملEvolution and ageing.
Did senescence evolve as a direct result of natural selection in order to limit the life-span or did increases in longevity evolve in the face of random events that ordinarily limit the life-span? The adaptive hypothesis is that senescence is a programmed process which appeared in evolution because a limited life-span has selective advantages for certain species. Non-adaptive theorists hold tha...
متن کاملThe causes of population ageing
onset of fertility decline move through their adult years towards old age. The result is that the proportion of children in the population falls and the proportion of older people rises. Once the fertility rate settles at a new, lower, level, the age structure of the population will shift (over about 70 years) to reach a new equilibrium with a permanently lower proportion of children and higher...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: SSRN Electronic Journal
سال: 2012
ISSN: 1556-5068
DOI: 10.2139/ssrn.2208886