Volume 11, Issue 8 e201800014
FULL ARTICLE

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

Alem Gebru

Corresponding Author

Alem Gebru

FaunaPhotonics APS, Copenhagen, Denmark

Department of Physics, Lund Laser Centre, Lund University, Lund, Sweden

Department of Biology, Centre for Animal Movement, Lund University, Lund, Sweden

Correspondence

Alem Gebru, FaunaPhotonics APS, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.

Email: [email protected]

Mikkel Brydegaard, Department of Physics, Lund University, Sölvegatan 14, 22362 Lund, Sweden.

Email: [email protected]

Search for more papers by this author
Samuel Jansson

Samuel Jansson

Department of Physics, Lund Laser Centre, Lund University, Lund, Sweden

Department of Biology, Centre for Animal Movement, Lund University, Lund, Sweden

Search for more papers by this author
Rickard Ignell

Rickard Ignell

Chemical Ecology Unit, Department of Plant Protection Biology, SLU, Alnarp, Sweden

Search for more papers by this author
Carsten Kirkeby

Carsten Kirkeby

FaunaPhotonics APS, Copenhagen, Denmark

National Veterinary Institute, Technical University of Denmark, Frederiksberg C, Denmark

Search for more papers by this author
Jord C. Prangsma

Jord C. Prangsma

FaunaPhotonics APS, Copenhagen, Denmark

Search for more papers by this author
Mikkel Brydegaard

Corresponding Author

Mikkel Brydegaard

FaunaPhotonics APS, Copenhagen, Denmark

Department of Physics, Lund Laser Centre, Lund University, Lund, Sweden

Department of Biology, Centre for Animal Movement, Lund University, Lund, Sweden

Norsk Elektro Optikk AS, Skedsmokorset, Norway

Correspondence

Alem Gebru, FaunaPhotonics APS, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.

Email: [email protected]

Mikkel Brydegaard, Department of Physics, Lund University, Sölvegatan 14, 22362 Lund, Sweden.

Email: [email protected]

Search for more papers by this author
First published: 05 March 2018
Citations: 49
Funding information Innovation Foundation, Denmark; Lunds Universitet; Lund Laser Centre; Swedish Research Council; The Innovation Foundation; FaunaPhotonics

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 1550 nm, 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.

image

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.