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Research article - Peer-reviewed, 2021

Mosquito Host Seeking in 3D Using a Versatile Climate-Controlled Wind Tunnel System

Hinze, Annika; Lantz, Jorgen; Hill, Sharon R.; Ignell, Rickard

Abstract

Future anthropogenic climate change is predicted to impact sensory-driven behaviors. Building on recent improvements in computational power and tracking technology, we have developed a versatile climate-controlled wind tunnel system, in which to study the effect of climate parameters, including temperature, precipitation, and elevated greenhouse gas levels, on odor-mediated behaviors in insects. To establish a baseline for future studies, we here analyzed the host-seeking behavior of the major malaria vector mosquito, Anopheles gambiae sensu strico, to human odor and carbon dioxide (CO2), under tightly controlled climatic conditions, and isolated from potential background contamination by the presence of an experimenter. When presented with a combination of human foot odor and CO2 (case study I), mosquitoes engaged in faster crosswind flight, spent more time in the filamentous odor plume and targeted the odor source more successfully. In contrast, female An. gambiae s. s. presented with different concentrations of CO2 alone, did not display host-seeking behavior (case study II). These observations support previous findings on the role of human host-associated cues in host seeking and confirm the role of CO2 as a synergist, but not a host-seeking cue on its own. Future studies are aimed at investigating the effect of climate change on odor-mediated behavior in mosquitoes and other insects. Moreover, the system will be used to investigate detection and processing of olfactory information in various behavioral contexts, by providing a fine-scale analysis of flight behavior.

Keywords

Anopheles gambiae; host seeking; 3D tracking; carbon dioxide; olfaction; human odor; behavior

Published in

Frontiers in Behavioral Neuroscience
2021, volume: 15, article number: 643693
Publisher: FRONTIERS MEDIA SA

Authors' information

Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Lantz, Jörgen
Jörgen Lantz Engineering Consulting Firm
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology

Sustainable Development Goals

SDG3 Good health and wellbeing
SDG13 Climate action

UKÄ Subject classification

Ecology

Publication Identifiers

DOI: https://doi.org/10.3389/fnbeh.2021.643693

URI (permanent link to this page)

https://res.slu.se/id/publ/111367