Temperature preference of sugar- or blood-fed Aedes japonicus mosquitoes under semi-natural conditions

Ziegler, R.; Blanckenhorn, Wolf U.; Mathis, Alexander; Verhulst, Niels O.

doi:10.1016/j.jtherbio.2023.103592

Cited by 3 publications

(2 citation statements)

References 42 publications

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“…albopictus females as an attempt to escape the heat stress they were exposed to. When mosquitoes are provided with microhabitats that differ in temperature, they generally prefer areas with cooler temperatures, particularly when the ambient temperature is relatively high, and will avoid temperatures above 30 °C [ 38 , 74 , 75 ]. It would be of interest to perform additional studies evaluating the activity levels in adult Ae.…”

Section: Discussionmentioning

confidence: 99%

Effects of Temperature on Blood Feeding and Activity Levels in the Tiger Mosquito, Aedes albopictus

Costanzo,

Occhino

2023

Insects

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Temperature has been shown to have profound effects on mosquito population dynamics and life history. Understanding these effects can provide insight into how mosquito populations and the diseases they transmit may vary across space and time and under the changes imposed by climate change. In this study, we evaluated how temperature affects the blood feeding and general activity patterns in the globally invasive mosquito species Aedes albopictus. We reared cohorts of Ae. albopictus from hatch through adulthood across three temperatures (26 °C, 29 °C, and 32 °C). The propensity of adult females to take a blood meal and the size of the blood meal were compared across temperatures. We also observed the overall activity levels of adult females over a 13.5 h period. At the highest temperature tested (32 °C), females were less likely to take a blood meal and were most active, as measured through frequency of movement. We postulate that our highest-temperature treatment imposes heat stress on adult female Ae. albopictus, where many abstain from blood feeding and increase movement in an attempt to escape the heat stress and find a more favorable resting location.

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Section: Discussionmentioning

confidence: 99%

Effects of Temperature on Blood Feeding and Activity Levels in the Tiger Mosquito, Aedes albopictus

Costanzo,

Occhino

2023

Insects

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“…Nonetheless, little is known about environmental preferences and tolerances in most vector species ( cf . [ 52 , 53 ]), and this is particularly true for sand flies.…”

Section: Introductionmentioning

confidence: 99%

Humidity and temperature preference in two Neotropical species of sand flies

Vivero-Gomez,

Duque-Granda,

Rader

et al. 2024

Parasites Vectors

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Background Arthropods vector a multitude of human disease-causing organisms, and their geographic ranges are shifting rapidly in response to changing climatic conditions. This is, in turn, altering the landscape of disease risk for human populations that are brought into novel contact with the vectors and the diseases they carry. Sand flies in the genera Lutzomyia and Pintomyia are vectors of serious disease-causing agents such as Leishmania (the etiological agent of leishmaniasis) and may be expanding their range in the face of climate change. Understanding the climatic conditions that vector species both tolerate physiologically and prefer behaviorally is critical to predicting the direction and magnitude of range expansions and the resulting impacts on human health. Temperature and humidity are key factors that determine the geographic extent of many arthropods, including vector species. Methods We characterized the habitat of two species of sand flies, Lutzomyia longipalpis and Pintomyia evansi. Additionally, we studied two behavioral factors of thermal fitness–thermal and humidity preference in two species of sand flies alongside a key aspect of physiological tolerance–desiccation resistance. Results We found that Lu. longipalpis is found at cooler and drier conditions than Pi. evansi. Our results also show significant interspecific differences in both behavioral traits, with Pi. evansi preferring warmer, more humid conditions than Lu. longipalpis. Finally, we found that Lu. longipalpis shows greater tolerance to extreme low humidity, and that this is especially pronounced in males of the species. Conclusions Taken together, our results suggest that temperature and humidity conditions are key aspects of the climatic niche of Lutzomyia and Pintomyia sand flies and underscore the value of integrative studies of climatic tolerance and preference in vector biology. Graphical Abstract

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Altered thermal preferences of infected or immune-challenged Aedes aegypti and Aedes japonicus mosquitoes

Hug,

Gretener-Ziegler,

Stegmayer

et al. 2024

Sci Rep

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Temperature is a critical factor shaping physiology, life cycle, and behaviour of ectothermic vector insects, as well as the development and multiplication of pathogens within them. However, the influence of pathogen infections on thermal preferences (behavioural thermoregulation) is not well-understood. The present study examined the thermal preferences of mosquitoes (Aedes aegypti and Ae. japonicus) infected with either Sindbis virus (SINV) or Dirofilaria immitis over 12 days post exposure (p.e.) or injected with a non-pathogenic Sephadex bead over 24 h in a thermal gradient (15–30 °C). SINV-infected Ae. aegypti preferred 5 °C warmer temperatures than non-infected ones at day 6 p.e., probably the time of highest innate immune response. In contrast, D. immitis-infected Ae. japonicus preferred 4 °C cooler temperatures than non-infected ones at day 9 p.e., presumably a stress response during the migration of third instar larvae from their development site to the proboscis. Sephadex bead injection also induced a cold preference in the mosquitoes but to a level that did not differ from control-injections. The cold preference thus might be a strategy to escape the risk of desiccation caused by the wound created by piercing the thorax. Further research is needed to uncover the genetic and physiological mechanisms underlying these behaviours.

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Temperature preference of sugar- or blood-fed Aedes japonicus mosquitoes under semi-natural conditions

Cited by 3 publications

References 42 publications

Effects of Temperature on Blood Feeding and Activity Levels in the Tiger Mosquito, Aedes albopictus

Effects of Temperature on Blood Feeding and Activity Levels in the Tiger Mosquito, Aedes albopictus

Humidity and temperature preference in two Neotropical species of sand flies

Altered thermal preferences of infected or immune-challenged Aedes aegypti and Aedes japonicus mosquitoes

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