Results 51 to 60 of about 9,387,316 (229)
Allee effect in a discrete-time predator-prey system
, 2009 In this paper, we study the stability of a discrete-time predator-prey system with and without Allee effect. By analyzing both systems, we first obtain local stability conditions of the equilibrium points without the Allee effect and then exhibit the ...
Duman, Oktay, Celik, Canan
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Impact of Refuge on the Dynamical Behavior of a Tri-Trophic Food Chain Model Under Allee Effect in Prey Species [PDF]
EPJ Web of ConferencesThe current study focuses on the impact of refuge on the dynamical behaviour of a tri-trophic food chain model under the Allee effect in prey species. The model investigates the asymptotic behaviour of multiple equilibrium points and the influence of the
Kumawat Lokesh, Kaur Harpreet
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Evolutionary dynamics and strong Allee effects
Journal of Biological Dynamics, 2012 We describe the dynamics of an evolutionary model for a population subject to a strong Allee effect. The model assumes that the carrying capacity k(u), inherent growth rate r(u), and Allee threshold a(u) are functions of a mean phenotypic trait u subject to evolution. The model is a plane autonomous system that describes the coupled population and mean
J M, Cushing, Jarred T, Hudson
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Wildlife Monographs, EarlyView.Abstract Woodland caribou (Rangifer tarandus) are one of the most iconic wildlife species in Canada. These large ungulates depend on undisturbed, interconnected assemblages of mature and old‐growth conifer forests for survival, and exhibit life‐history traits typical of K‐selected species (i.e., low reproductive rates, long generation times, and slow ...
Anna M. Calvert +2 more
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Allee effects in marine systems [PDF]
Marine Ecology Progress Series, 2004 The fitness or population growth rate of populations with Allee effects increases with in- creasing population size or density up to a certain threshold. Allee effects are possible in marine pop- ulations, as they are less open than has been assumed and may have a metapopulation structure.
J Gascoigne, RN Lipcius
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Localized resources enable noninvasive genetic monitoring of small populations of mountain ungulates
Wildlife Society Bulletin, EarlyView.Using microsatellite analysis of fecal samples collected at mineral licks from 2019–2022, we assessed abundance, apparent survival and genetics of bighorn sheep in the Teton Range, Wyoming, USA. Annual abundance estimates ranged from 118−132 individuals split into 2 similar‐sized demes and apparent survival estimates ranged from 0.72–0.92.
Carson J. Butler +4 more
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Jambura Journal of Mathematics, 2020 In this paper, the influence of additive Allee effect in prey and periodic harvesting in predator to the dynamics of the Leslie-Gower predator-prey model is proposed.
Hasan S. Panigoro +3 more
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Journal of Mathematics, 2022 In this study, a predator-prey model with the Allee effect and fear effect is established. We use the comparison principle to prove boundedness. The zero equilibrium point and nonzero equilibrium point of the model are calculated, and the local stability
Ye Xuan Li +5 more
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Context‐dependent joint buffering of abiotic stress by parental care and sibling interactions
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Climate change represents one of the most complex challenges of the 21st century, increasing global temperatures and the occurrence of extreme events, such as heatwaves, cold snaps, floods or droughts.
Paul Huber +5 more
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Importance of the Allee effect for reintroductions
, 2007 International audienceMany factors, both biotic and abiotic, impede the success of reintroductions. Among these is the difficulty that small populations have in surviving and thriving. For many species of animals and plants, populations at low density or
Deredec, Anne, Courchamp, Franck
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