A discrete-time host-parasitoid model with an Allee effect.
We introduce a discrete-time host-parasitoid model with a strong Allee effect on the host. We adapt the Nicholson-Bailey model to have a positive density dependent factor due to the presence of an Allee effect, and a negative density dependence factor due to intraspecific competition. It is shown that there are two scenarios, the first with no interior fixed points and the second with one interior fixed point. In the first scenario, we show that either both host and parasitoid will go to extinction or there are two regions, an extinction region where both species go to extinction and an exclusion region in which the host survives and tends to its carrying capacity. In the second scenario, we show that either both host and parasitoid will go to extinction or there are two regions, an extinction region where both species go to extinction and a coexistence region where both species survive.
['Livadiotis|G|G|', 'Assas|L|L|', 'Dennis|B|B|', 'Elaydi|S|S|', 'Kwessi|E|E|']
D000818:Animals D001522:Behavior, Animal D003163:Competitive Behavior D053476:Extinction, Biological D006790:Host-Parasite Interactions D008954:Models, Biological D011156:Population Density D011157:Population Dynamics D013997:Time Factors
Allee effect host parasitoid extinction coexistence 39A11 92D25 stability