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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 91, No. 5, 1996, pp. 641-648
Bioline Code: oc96116
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 91, No. 5, 1996, pp. 641-648

 en Dynamics of Experimental Populations of Native and Introduced Blowflies (Diptera: Calliphoridae): Mathematical Modelling and the Transition from Asymptotic Equilibrium to Bounded Oscillations
WAC Godoy; CJ Von Zuben; SF Dos Reis & FJ Von Zuben

Abstract

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.

Keywords
Cochliomyia macellaria - Chrysomya megacephala - Chrysomya putoria - population dynamics - sensibility analysis

 
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