منابع مشابه
Allee effect from parasite spill-back.
The exchange of native pathogens between wild and domesticated animals can lead to novel disease threats to wildlife. However, the dynamics of wild host-parasite systems exposed to a reservoir of domesticated hosts are not well understood. A simple mathematical model reveals that the spill-back of native parasites from domestic to wild hosts may cause a demographic Allee effect in the wild host...
متن کاملInvestor Attention Spill-Over Effect: Evidence from DJIA Record Days
Using the Dow Jones Industrial Average Index record breaking days as a proxy for market wide attention, we show that as the aggregate stock market intensifies investor attention, stock market response to individual firms’ earnings announcements significantly increases. We hypothesize that there are many channels for the attention spill-over effect and document strong supportive evidence of one ...
متن کاملAn Economical Model with Allee effect
The Marx model for the profit rate r depending on the exploitation rate e and on the organic composition of the capital k is studied using a dynamical approach. Supposing both e(t) and k(t) are continuous functions of time we derive a law for r(t) in the long term. Depending upon the hypothesis set on the growth of k(t) and e(t) in the long term, r(t) can fall to zero or remain constant. This l...
متن کاملAllee effect, sexual selection and demographic stochasticity
The negative frequency-dependent effect of reproductive success in animals on population growth refers to a category of phenomena termed the Allee effect. The mechanistic basis for this effect and hence an understanding of its consequences has been obscure. We suggest that sexual selection, in particular female mate preferences, is a previously neglected component giving rise to the Allee effec...
متن کاملAllee effect in eukaryotic cell populations
The suspension culture of cells at provides an opportunity to study the multicellular life at low cell densities. In our earlier work with the model eukaryote Dictyostelium discoideum, we argued that the familiar but not understood transition from slow-to-fast growth at low cell densities (lag-log transition) was a collective, Allee effect during which cells communicate their density to one ano...
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: The American Naturalist
سال: 2013
ISSN: 0003-0147,1537-5323
DOI: 10.1086/673238