 |
| Titel |
The effect of physical water quality and water level changes on the occurrence and density of Anopheles mosquito larvae around the shoreline of the Koka reservoir, central Ethiopia |
| VerfasserIn |
B. M. Teklu, H. Tekie, M. McCartney, S. Kibret |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 12 ; Nr. 14, no. 12 (2010-12-16), S.2595-2603 |
| Datensatznummer |
250012533
|
| Publikation (Nr.) |
 copernicus.org/hess-14-2595-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Entomological studies to determine the effect of the physical
characteristics of mosquito larval breeding water bodies and reservoir water
level changes on the occurrence of Anopheles mosquito larvae were conducted in two
villages at Koka reservoir in central Ethiopia between August and December
2007. Of the two study villages, Ejersa is located close to the reservoir,
and Kuma is 5 km away from it. Data on the type, number and physical
characteristics of Anopheles larval breeding habitat, species composition and
densities of anopheles mosquitoes in and around the study villages were
investigated and recorded. Meteorological and reservoir water level data
were compared with availability of Anopheles larval breeding sites and densities.
Entomological data, derived from weekly larval collections, showed that
Anopheles pharoensis Theobald, Anopheles gambiae s.l. Giles, Anopheles coustani Laveran
and Anopheles squamosus Theobald were breeding in the study area. The
mean larval density of An. gambiae s.l. in this study was higher in slightly turbid and
shallow aquatic habitat than in turbid and relatively deep aquatic habitat.
The density of An. pharoensis in habitat with floating vegetation and with relatively shady
conditions was significantly higher than that of less shaded aquatic habitat
and greater emergent vegetation. There was also a positive correlation
between the occurrence of Anopheles larvae with the water and daily minimum
atmospheric temperature. Similarly at Ejersa, over the sampling period,
there was a positive correlation between falling reservoir water levels and
the number of positive breeding habitats. These results confirm that
physical characteristics of the water bodies play an important role in the
species composition, total Anopheles larval count, and the density of Anopheles mosquitoes.
Suitable breeding habitat in the vicinity of the reservoir village was
strongly associated with the reservoir. This is particularly important for
An. pharoensis and An. gambiae s.l. which are important vectors of malaria in the area. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|