Unique fine scale village spatial-temporal distributions of Anopheles farauti differ by physiological state and sex

Pollard, Edgar J.M., Russell, Tanya L., Apairamo, Allan, and Burkot, Thomas R. (2019) Unique fine scale village spatial-temporal distributions of Anopheles farauti differ by physiological state and sex. Parasites & Vectors, 12. 558.

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Abstract

Background: The ecology of many mosquitoes, including Anopheles farauti, the dominant malaria vector in the southwest Pacific including the Solomon Islands, remains inadequately understood. Studies to map fine scale vector distributions are biased when trapping techniques use lures that will influence the natural movements of mosquitoes by attracting them to traps. However, passive collection methods allow the detailed natural distributions of vector populations by sex and physiological states to be revealed.

Methods: The barrier screen, a passive mosquito collection method along with human landing catches were used to record An. farauti distributions over time and space in two Solomon Island villages from May 2016 to July 2017.

Results: Temporal and spatial distributions of over 15,000 mosquitoes, including males as well as unfed, host seeking, blood-fed, non-blood fed and gravid females were mapped. These spatial and temporal patterns varied by species, sex and physiological state. Sugar-fed An. farauti were mostly collected between 10–20 m away from houses with peak activity from 18:00 to 19:00 h. Male An. farauti were mostly collected greater than 20 m from houses with peak activity from 19:00 to 20:00 h.

Conclusions: Anopheles farauti subpopulations, as defined by physiological state and sex, are heterogeneously distributed in Solomon Island villages. Understanding the basis for these observed heterogeneities will lead to more accurate surveillance of mosquitoes and will enable spatial targeting of interventions for greater efficiency and effectiveness of vector control.

Item ID: 61098
Item Type: Article (Research - C1)
ISSN: 1756-3305
Keywords: Anopheles farauti, barrier screen, Solomon Islands, males, sugar-feds
Copyright Information: © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License.
Funders: Bill and Melinda Gates Foundation (BMGF), National Institute of Allergy and Infectious Diseases (NIAID) of the National Institutes of Health for the International Center of Excellence in Malaria Research (NIH-ICEMR) Southwest Pacific, Rotarians Against Malaria (RAM)
Projects and Grants: BMGF Grant No. 45114
Research Data: http://doi.org/10.25903/5d4a446668e70
Date Deposited: 12 Dec 2019 01:21
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060207 Population Ecology @ 100%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960405 Control of Pests, Diseases and Exotic Species at Regional or Larger Scales @ 40%
92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920499 Public Health (excl. Specific Population Health) not elsewhere classified @ 60%
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