Caught between two Allee effects: Trade-off between reproduction and predation risk

0345293 - BC 2011 RIV GB eng J - Journal Article
Pavlová, V. - Berec, Luděk - Boukal, David S.
Caught between two Allee effects: Trade-off between reproduction and predation risk.
Journal of Theoretical Biology. Roč. 264, č. 3 (2010), s. 787-798. ISSN 0022-5193. E-ISSN 1095-8541
R&D Projects: GA AV ČR KJB600070602
Institutional research plan: CEZ:AV0Z50070508
Keywords : anti-predator behaviour * dilution effect * extinction
Subject RIV: EH - Ecology, Behaviour
Impact factor: 2.371, year: 2010

We use simple models to explore population-dynamical consequences of a trade-off between reproduction and predation risk for populations subject to a mate-finding Allee effect and an Allee effect due to predation. We show that depending on the cost of reproduction in terms of predation, the population can always go extinct, or go extinct only over a certain range of low, intermediate or high levels of reproductive activities. Predator removal has the least effect on populations with low cost of reproduction in terms of predation and, conversely, predator addition is most effective for populations with high predation cost of reproduction. The fate of populations subject to the two antagonistic Allee effects should therefore be evaluated on a case-by-case basis.
Permanent Link: http://hdl.handle.net/11104/0186606