Multiband modulation spectroscopy for the determination of sex and species of mosquitoes in flight

Research output: Contribution to journalArticle

Abstract

We present a dual-wavelength polarimetric measurement method to distinguish species and sexes of disease transmitting mosquitoes in flight. By measuring co- and de-polarized backscattered light at 808 and 1550nm, the degree of linear polarization, wingbeat frequency, reflectance, spectral ratio and glossiness of mosquitoes can be retrieved. Body and wing contributions to these signals can be separated. Whereas the optical cross section is sensitive to the aspect of observation, thus the heading direction of the insect in flight, we demonstrate that polarimetric- and spectral-band ratios are largely invariant to the aspect of observation. We show that wing glossiness, as well as wing- and body-spectral ratios are particularly efficient in distinguishing Anopheles coluzzii and Anopheles arabiensis, 2 closely related species of malaria vectors. Spectral and polarimetric ratios relate to microstructural and melanization features of the wing and body of these species. We conclude that multiband modulation spectroscopy is a useful expansion of the parameter space that can be used to improve the specificity of entomological lidars.

Details

Authors
Organisations
External organisations
  • Technical University of Denmark
  • FaunaPhotonics ApS
  • Lund University
  • Swedish University of Agricultural Sciences, Alnarp
  • Norsk Elektro Optikk AS
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
  • Zoology

Keywords

  • Disease vectors, Entomological lidar, Modulation spectroscopy, Species classification, Wing interference patterns
Original languageEnglish
Article numbere201800014
JournalJournal of Biophotonics
Volume11
Issue number8
Early online date2018 Apr 16
Publication statusPublished - 2018
Publication categoryResearch
Peer-reviewedYes

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