Abstract
We study the dynamics of a discrete model with two different stages of the population, the pre-adult stage governed by a Beverton–Holt-type map and the adult stage by a \(\gamma\)-Ricker map. The composition of both maps gives the dynamics. The existence of the Allee effect is easily observed. We check that the model can evolve from a sure extinction to complicated dynamics. The presence of an almost sure extinction is proved to exist when the dynamical complexity is the highest possible.
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Notes
In fact, the equation provides two solutions, but one of them makes no sense for this model.
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Funding
This work has been supported by the grant MTM2017-84079-P funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe,” by the “European Union.” We would like to thank the anonymous reviewer for his/her comments toward improving our manuscript. His/her suggestions made us to think in this paper with different views, and so we are grateful for that.
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Jose S. Cánovas and Marìa Muñoz Guillermo contributed equally to the paper’s conceptualization, methodology, formal analysis and writing of the original draft.
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Cánovas, J.S., Muñoz-Guillermo, M. On a population model with density dependence and Allee effect. Theory Biosci. 142, 423–441 (2023). https://doi.org/10.1007/s12064-023-00407-y
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DOI: https://doi.org/10.1007/s12064-023-00407-y