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Habitat Diversity, Stability, and Productivity of Malaria Vectors in Irrigated and Nonirrigated Ecosystems in Western Kenya
- Source :
- Journal of medical entomology, vol 60, iss 1
- Publication Year :
- 2022
-
Abstract
- Several sub-Saharan African countries rely on irrigation for food production. This study examined the impact of environmental modifications resulting from irrigation on the ecology of aquatic stages of malaria vectors in a semi-arid region of western Kenya. Mosquito larvae were collected from irrigated and non-irrigated ecosystems during seasonal cross-sectional and monthly longitudinal studies to assess habitat availability, stability, and productivity of anophelines in temporary, semipermanent, and permanent habitats during the dry and wet seasons. The duration of habitat stability was also compared between selected habitats. Emergence traps were used to determine the daily production of female adult mosquitoes from different habitat types. Malaria vectors were morphologically identified and sibling species subjected to molecular analysis. Data was statistically compared between the two ecosystems. After aggregating the data, the overall malaria vector productivity for habitats in the two ecosystems was estimated. Immatures of the malaria vector (Anopheles arabiensis) Patton (Diptera: Culicidae) comprised 98.3% of the Anopheles in both the irrigated and non-irrigated habitats. The irrigated ecosystem had the most habitats, higher larval densities, and produced 85.8% of emerged adult females. These results showed that irrigation provided conditions that increased habitat availability, stability, and diversity, consequently increasing the An. arabiensis production and potential risk of malaria transmission throughout the year. The irrigated ecosystems increased the number of habitats suitable for Anopheles breeding by about 3-fold compared to non-irrigated ecosystems. These results suggest that water management in the irrigation systems of western Kenya would serve as an effective method for malaria vector control.
- Subjects :
- General Veterinary
malaria
larval ecology
Mosquito Vectors
Biological Sciences
Kenya
Medical and Health Sciences
irrigation
Vector-Borne Diseases
Cross-Sectional Studies
Infectious Diseases
Rare Diseases
Good Health and Well Being
Insect Science
Larva
environmental modification
Tropical Medicine
Anopheles
Animals
Parasitology
Female
Infection
Ecosystem
Subjects
Details
- ISSN :
- 19382928
- Database :
- OpenAIRE
- Journal :
- Journal of medical entomology
- Accession number :
- edsair.doi.dedup.....31c37f26ed2ac4f74fe5d82b4d887a75