Results 11 to 20 of about 42,411 (234)

The genetic Allee effect: a unified framework for the genetics and demography of small populations

open access: yesEcosphere, 2016
The Allee effect is a theoretical model predicting low growth rates and the possible extinction of small populations. Historically, studies of the Allee effect have focused on demography.
Gloria M. Luque   +5 more
doaj   +2 more sources

An effective Allee effect may induce the survival of low-density predator

open access: yesResults in Physics, 2023
Allee effect, as one of the research hotspots in ecology and conservation biology, extremely easily affects the distribution of population in space, especially for the low-density population. In the ecosystem, the spatial distribution of predator is more
Li-Ying Ning   +5 more
doaj   +1 more source

Allee effects in ants [PDF]

open access: yesJournal of Animal Ecology, 2013
SummaryAllee effects occur when the aggregation of individuals result in mutually beneficial intraspecific interactions whereby individual fitness, or per capita growth rate, increases with the number of individuals. Allee effects are common in social species due to their cooperative behaviours, such as breeding, feeding or defence.
Luque, Gloria   +2 more
openaire   +3 more sources

Genetic Allee effects and their interaction with ecological Allee effects [PDF]

open access: yesJournal of Animal Ecology, 2016
Summary It is now widely accepted that genetic processes such as inbreeding depression and loss of genetic variation can increase the extinction risk of small populations.
Wittmann, Meike J.   +2 more
openaire   +2 more sources

Spawner weight and ocean temperature drive Allee effect dynamics in Atlantic cod, Gadus morhua: inherent and emergent density regulation [PDF]

open access: yesBiogeosciences, 2023
Stocks of Atlantic cod, Gadus morhua, show diverse recovery responses when fishing pressure is relieved. The expected outcome of reduced fishing pressure is that the population regains its size.
A.-M. Winter   +3 more
doaj   +1 more source

Dynamical behaviour of discrete logistic equation with Allee effect in an uncertain environment

open access: yesResults in Control and Optimization, 2023
The Allee effect refers to a natural occurrence where the average individual fitness of a population or species is correlated with population size or density. A demographic Allee effect having a threshold population size constitutes a strong Allee effect.
Abdul Alamin   +4 more
doaj   +1 more source

Allee Effects May Slow the Spread of Parasites in a Coastal Marine Ecosystem [PDF]

open access: yes, 2011
Allee effects are thought to mediate the dynamics of population colonization, particularly for invasive species. However, Allee effects acting on parasites have rarely been considered in the analogous process of infectious disease establishment and ...
Connors, B. M.   +3 more
core   +1 more source

Review: Allee effects in social species [PDF]

open access: yesJournal of Animal Ecology, 2017
Abstract Allee effects have important implications for many aspects of basic and applied ecology. The benefits of aggregation of conspecific individuals are central to Allee effects, which have led to the widely held assumption that social species are more prone to Allee effects. Robust evidence for this assumption, however, remains rare. Furthermore,
Elena Angulo   +6 more
openaire   +3 more sources

Allee Effect from Parasite Spill-Back [PDF]

open access: yesThe American Naturalist, 2013
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 ...
Krkosek, Martin   +3 more
openaire   +4 more sources

Estimating Allee dynamics before they can be observed: polar bears as a case study. [PDF]

open access: yesPLoS ONE, 2014
Allee effects are an important component in the population dynamics of numerous species. Accounting for these Allee effects in population viability analyses generally requires estimates of low-density population growth rates, but such data are ...
Péter K Molnár   +2 more
doaj   +1 more source

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