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Releases of sterilizing males for mosquito population elimination: New insights from a bistable model

Dumont Yves, Strugarek Martin. 2018. Releases of sterilizing males for mosquito population elimination: New insights from a bistable model. Biomath Communications, 5 (1), suppl. BIOMATH 2018, 1 p. Biomath 2018 : International Conference on Mathematical Methods and Models in Biosciences and a School for Young Scientists, Sofia, Bulgarie, 24 June 2018/29 June 2018.

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Abstract : Motivated by recent field experiments in French Polynesia, we aim at understanding the time dynamics of a mosquito population of genus Aedes exposed to artificial releases of sterilizing males. These males can be either sterilized by irradiation (SIT) or have a sterile crossing with wild females due to incompatible strains of {\it Wolbachia} (IIT). In both cases the released males sterilize the wild females they mate with and the target is population elimination. Inspired by [1], we derive a minimalistic model to control mosquito population by SIT/IIT. Contrary to the previous models, it is bistable in general, allowing simultaneously for eradication of the population and for its survival. In addition, this control system is monotone in the sense of [2]. We consider different type of releases (constant, continuous, or periodic and instantaneous) and show necessary conditions to reach eradication in each case. We also derive the minimal application time below which eradication cannot occur. The key mathematical tool is the separatrix between the two basins of attraction in this bistable monotone system. The applications of this work are two-fold: to help identifying key parameters (here, the mating probability and the duration of the egg compartment stand out both numerically and analytically), and to help designing release protocols.

Mots-clés libres : Sterile insect technique, Aedes albopictus, Mathematical modelling, Ordinary differential equation, Incompatible Insect Technique, Monotone system, Elimination, Bistability, Control

Classification Agris : L10 - Animal genetics and breeding
L53 - Animal physiology - Reproduction
L72 - Pests of animals

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Dumont Yves, CIRAD-BIOS-UMR AMAP (FRA) ORCID: 0000-0003-4817-685X
  • Strugarek Martin, University of Pretoria (ZAF) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/589359/)

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