PARENT SESSION
Poster Session 20: Invasive Species
Wednesday, August 10, 5:00 PM - 6:30 PM, Exhibit Hall 220 A-E, Level 2, Palais des congrès de Montréal

Stochastic dynamics in coupled populations of exotic and native blowflies.

Godoy, Wesley^*,, Serra, Hiraldo, Faria, Lucas,

ABSTRACT- In this study we analysed the stochastic population dynamics of blowflies by combining a density-dependent model with a two-coupled population model in order to compare the theoretical vulnerability of introduced and native blowfly species to local and global extinction in single and coupled populations. Stochastic fecundity, survival and migration were investigated with parametric values estimated from experimental data. Stochastic fecundity identified Chrysomya putoria as the species most vulnerable to local extinction. Considering stochastic survival alone, C. albiceps was the species most susceptible to the risk of local extinction. With stochastic fecundity and survival combined, C.albiceps showed the highest risk of local extinction. Simultaneous stochastic fecundity, survival and migration increased the risk of extinction in Lucilia eximia and C. albiceps but decreased it in the other species.

Key words: Stochastic dynamics, blowflies, coupled populations