Impacts of sampling rhythm and exposition on the effectiveness of artificial resting shelters for mosquito collection in northern Germany

Sauer, Felix; Jaworski, Linda; Lühken, Renke; Kiel, Ellen

doi:10.1111/jvec.12383

Cited by 7 publications

(16 citation statements)

References 16 publications

(27 reference statements)

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“…morsitans / fumipennis for dark cavities is underpinned by a previous study, which demonstrated garden pop‐up bags as useful artificial resting sites to collect Cs. morsitans / fumipennis (Sauer et al ., 2020). A study from the tropics further supports this suggestion, showing that species communities collected in buttress roots and hollow trees are similar to artificial resting sites, but differ from the mosquito community collected in the understory vegetation (Burkett‐Cadena et al ., 2013).…”

Section: Discussionmentioning

confidence: 99%

“…to digest blood‐meals. This is reflected in the mosquito collections from resting sites commonly consisting of a higher fraction of blood‐fed and gravid females compared to conventional baited traps, which target host‐seeking females using carbon dioxide as a primary attractant (Burkett‐Cadena et al ., 2008; Sauer et al ., 2020). Various artificial resting sites have been proven as useful tool for mosquito collection, including wooden boxes (Edman et al ., 1968), wire‐frame shelters (Burkett‐Cadena, 2011) or fibre pots (Komar et al ., 1995).…”

Section: Introductionmentioning

confidence: 99%

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Habitat and microclimate affect the resting site selection of mosquitoes

Sauer

Grave

Lühken

et al. 2021

Medical Vet Entomology

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Mosquitoes (Diptera: Culicidae) use certain resting sites during their inactive phase. The microclimatic conditions of these resting sites might affect their physiology and vectorial capacity. In this study, we combined a field and a laboratory study to investigate the natural resting site and temperature preferences of mosquitoes. The field study was conducted at a forest close to Oldenburg (Lower Saxony, Germany) from May to October 2018. Mosquitoes were collected in five different natural habitats with seven replicates each. Temperature was recorded hourly at each site. Significantly more mosquitoes were collected in deadwood (predominantly Culiseta morsitans/fumipennis) and shaded herb layer (predominantly Aedes species) compared to unshaded herb layer or broadleaf and coniferous trees. GLMMs revealed resting site habitats as the best predictor to explain the observed preference patterns, but microclimatic conditions are also involved in mosquito resting site selection. Most mosquitoes were collected at resting sites with relatively colder and more stable temperatures. In concert, laboratory choice experiments with a thermal gradient ring demonstrated that Cs. morsitans/fumipennis avoid temperatures over 30 °C. Understanding the small‐scaled resting site preferences and the related microclimatic conditions can improve mosquito collection techniques and refine the prediction of mosquito‐borne pathogen transmission.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Habitat and microclimate affect the resting site selection of mosquitoes

Sauer

Grave

Lühken

et al. 2021

Medical Vet Entomology

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“…In general, there is a lack of knowledge on the influence of inclination angles, compass orientation or type of tree on resting site selection, which all did not have a statistically significant effect in this study. Downward directions increase the shaded area within the pop‐up bags and thereby attract higher numbers of mosquito specimens in the resting sites compared to sideways installation (Sauer et al, 2020). However, the inclination of the resting sites in our study was mostly downwards, that is, did not cover a broad range of inclinations.…”

Section: Discussionmentioning

confidence: 99%

“…In comparison to carbon‐dioxide‐baited traps, mosquito collections with artificial resting sites are generally smaller in quantity of specimens and species (L'Ambert et al, 2012; Panella et al, 2011; Williams & Gingrich, 2007). Samples from artificial resting sites are considered more standardized compared to backpack aspiration in the understory vegetation (Brown et al, 2018) and have a higher proportion of gravid and engorged specimens (Brugman, 2016; Sauer et al, 2020), increasing the probability of detection of mosquito–borne pathogens. Furthermore, different studies demonstrated that collections from resting sites allow the trapping of species with a host preference for amphibians, birds or reptiles [e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, different studies demonstrated that collections from resting sites allow the trapping of species with a host preference for amphibians, birds or reptiles [e.g. Culex territans (Burkett‐Cadena et al, 2008) or Culiseta morsitans (Edman et al, 1968; Sauer et al, 2020)], which are usually underrepresented in samples with other trapping methods. In contrast, species of the genus Aedes rather rest in the understory vegetation and are rarely caught in artificial resting sites (Bidlingmayer, 1971; Burkett‐Cadena et al, 2008; Gusciora, 1971; Irby & Apperson, 1992).…”

Section: Introductionmentioning

confidence: 99%

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Artificial resting sites: An alternative sampling method for adult mosquitoes

Jaworski

Sauer

Jansen

et al. 2021

Medical Vet Entomology

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Mosquito collections are commonly conducted with baited traps predominantly attracting host‐seeking females. In contrast, resting sites are generally colonized by a broader range of the mosquito population, including a higher proportion of males and blood‐engorged females. This study evaluates the sampling success of different artificial resting sites, attached to a deciduous or coniferous tree at different heights. As standard sampling method, carbon dioxide‐baited Biogents Sentinel traps (BG traps) were operated in parallel. BG traps caught a higher number of specimens compared to the resting sites. However, the proportion of blood‐engorged females and males was higher in resting sites. More Culiseta spp. specimens were collected in resting sites compared to BG traps, but less Aedes spp. specimens. In general, fewer specimens and species were recorded in small resting sites and at top height level compared to medium or large resting sites at medium or ground level. The proportion of males was highest at the ground, while the proportion of engorged females was highest at medium and top level. Due to the higher proportion of blood‐engorged females, artificial resting sites are especially useful for studies of host‐feeding patterns or xenosurveillance. Low costs and efforts allow a cost‐effective increase of the number of resting sites per sampling site to collect more mosquitoes.

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