Dynamics of experimental populations of native and introduced blowflies (Diptera: Calliphoridae): mathematical modelling and the transition from asymptotic equilibrium to bounded oscillations

Memórias do Instituto Oswaldo Cruz

Wac Godoy²  Cj Von Zuben¹  Sf Dos Reis²  Fj Von Zuben¹ 

[1] ,Universidade Estadual Paulista IB Departamento de ParasitologiaBotucatu SP ,Brasil

关键词: Cochliomyia macellaria;    Chrysomya megacephala;    Chrysomya putoria;    population dynamics;    sensibility analysis;   

DOI  :  10.1590/S0074-02761996000500018

来源: SciELO

【 摘 要 】

The equilibrium dynamics of native and introduced blowflies is modelled using a density-dependent model of population growth that takes into account important features of the life-history in these flies. A theoretical analysis indicates that the product of maximum fecundity and survival is the primary determinant of the dynamics. Cochliomyia macellaria, a blowfly native to the Americas and the introduced Chrysomya megacephala and Chrysomya putoria, differ in their dynamics in that the first species shows a damping oscillatory behavior leading to a one-point equilibrium, whereas in the last two species population numbers show a two-point limit cycle. Simulations showed that variation in fecundity has a marked effect on the dynamics and indicates the possibility of transitions from one-point equilibrium to bounded oscillations and aperiodic behavior. Variation in survival has much less influence on the dynamics.

【 授权许可】

CC BY   
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