What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources
The use of heat as a cue for the orientation of haematophagous insects towards hot-blooded hosts has been acknowledged for many decades. In mosquitoes, thermoreception has been studied at the molecular, physiological and behavioural levels, and the response to heat has been evaluated in multimodal c...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v100_n_p9_Zermoglio http://hdl.handle.net/20.500.12110/paper_00221910_v100_n_p9_Zermoglio |
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paper:paper_00221910_v100_n_p9_Zermoglio2023-06-08T14:47:05Z What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources Zermoglio, Paula Florencia Lazzari, Claudio Ricardo Haematophagous Host-seeking Infrared perception Thermal orientation behavioral response female heat source male mosquito orientation orientation behavior physiological response temperature effect Aedes aegypti Hexapoda Aedes animal association female heat physiology spatial orientation taxis response Aedes Animals Cues Female Hot Temperature Orientation, Spatial Taxis Response The use of heat as a cue for the orientation of haematophagous insects towards hot-blooded hosts has been acknowledged for many decades. In mosquitoes, thermoreception has been studied at the molecular, physiological and behavioural levels, and the response to heat has been evaluated in multimodal contexts. However, a direct characterization of how these insects evaluate thermal sources is still lacking. In this study we characterize Aedes aegypti thermal orientation using a simple dual choice paradigm, providing direct evidence on how different attributes of heat sources affect their choice. We found that female mosquitoes, but not males, are able to discriminate among heat sources that are at ambient, host-range and deleterious temperatures when no other stimuli are present, eliciting a positive response towards host-range and an avoidance response towards deleterious temperatures. We also tested the preference of females according to the size and position of the sources. We found that females do not discriminate between heat sources of different sizes, but actively orientate towards closer sources at host temperature. Furthermore, we show that females cannot use IR radiation as an orientation cue. Orientation towards a host involves the integration of cues of different nature in distinct phases of the orientation. Although such integration might be decisive for successful encounter of the host, we show that heat alone is sufficient to elicit orientation behaviour. We discuss the performance of mosquitoes’ thermal behaviour compared to other blood-sucking insects. © 2017 Elsevier Ltd Fil:Zermoglio, P.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lazzari, C.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v100_n_p9_Zermoglio http://hdl.handle.net/20.500.12110/paper_00221910_v100_n_p9_Zermoglio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Haematophagous Host-seeking Infrared perception Thermal orientation behavioral response female heat source male mosquito orientation orientation behavior physiological response temperature effect Aedes aegypti Hexapoda Aedes animal association female heat physiology spatial orientation taxis response Aedes Animals Cues Female Hot Temperature Orientation, Spatial Taxis Response |
| spellingShingle |
Haematophagous Host-seeking Infrared perception Thermal orientation behavioral response female heat source male mosquito orientation orientation behavior physiological response temperature effect Aedes aegypti Hexapoda Aedes animal association female heat physiology spatial orientation taxis response Aedes Animals Cues Female Hot Temperature Orientation, Spatial Taxis Response Zermoglio, Paula Florencia Lazzari, Claudio Ricardo What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources |
| topic_facet |
Haematophagous Host-seeking Infrared perception Thermal orientation behavioral response female heat source male mosquito orientation orientation behavior physiological response temperature effect Aedes aegypti Hexapoda Aedes animal association female heat physiology spatial orientation taxis response Aedes Animals Cues Female Hot Temperature Orientation, Spatial Taxis Response |
| description |
The use of heat as a cue for the orientation of haematophagous insects towards hot-blooded hosts has been acknowledged for many decades. In mosquitoes, thermoreception has been studied at the molecular, physiological and behavioural levels, and the response to heat has been evaluated in multimodal contexts. However, a direct characterization of how these insects evaluate thermal sources is still lacking. In this study we characterize Aedes aegypti thermal orientation using a simple dual choice paradigm, providing direct evidence on how different attributes of heat sources affect their choice. We found that female mosquitoes, but not males, are able to discriminate among heat sources that are at ambient, host-range and deleterious temperatures when no other stimuli are present, eliciting a positive response towards host-range and an avoidance response towards deleterious temperatures. We also tested the preference of females according to the size and position of the sources. We found that females do not discriminate between heat sources of different sizes, but actively orientate towards closer sources at host temperature. Furthermore, we show that females cannot use IR radiation as an orientation cue. Orientation towards a host involves the integration of cues of different nature in distinct phases of the orientation. Although such integration might be decisive for successful encounter of the host, we show that heat alone is sufficient to elicit orientation behaviour. We discuss the performance of mosquitoes’ thermal behaviour compared to other blood-sucking insects. © 2017 Elsevier Ltd |
| author |
Zermoglio, Paula Florencia Lazzari, Claudio Ricardo |
| author_facet |
Zermoglio, Paula Florencia Lazzari, Claudio Ricardo |
| author_sort |
Zermoglio, Paula Florencia |
| title |
What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources |
| title_short |
What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources |
| title_full |
What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources |
| title_fullStr |
What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources |
| title_full_unstemmed |
What does heat tell a mosquito? Characterization of the orientation behaviour of Aedes aegypti towards heat sources |
| title_sort |
what does heat tell a mosquito? characterization of the orientation behaviour of aedes aegypti towards heat sources |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v100_n_p9_Zermoglio http://hdl.handle.net/20.500.12110/paper_00221910_v100_n_p9_Zermoglio |
| work_keys_str_mv |
AT zermogliopaulaflorencia whatdoesheattellamosquitocharacterizationoftheorientationbehaviourofaedesaegyptitowardsheatsources AT lazzariclaudioricardo whatdoesheattellamosquitocharacterizationoftheorientationbehaviourofaedesaegyptitowardsheatsources |
| _version_ |
1768541737808035840 |