This study investigated aspects of the breeding biology, ecophysiology,
morphology, over-wintering and population dynamics
of the pre-imaginal stages of members of the Anopheles
gambiae complex in northern Natal, South Africa,
Investigation of the breeding biology, concentrated on breeding
site utilisation by the different members of the Anopheles
gambiae complex. Surveillance personnel were unable to
locate the breeding sites of Anopheles arabiensis and postulated
that location and description of these would offer a
unique opportunity for control. The difficulty in locating
the breeding sites of An. arabiensis at certain localities
was found to be a product of their low density, presumably as
a result of the intra-domiciliary, residual insecticide spray
programme.
The effect of temperature on larval physiology and adult
morphology was investigated.
terms of their implications
Anopheles gambiae complex.
The findings are discussed in
for anopheline taxonomy and the
The effect of temperature on larval growth rates was investigated
in both the field and laboratory. The finding of this
part of the study indicate that the larval stages play an
important role in the over-wintering of populations within
the region. The control implications of these findings and
winter breeding site localisation are discussed. A theory for
the so called 'late season transmission i.e. Apri-May, within the province and southern Africa is proposed.
The population dynamics of An. merus were investigated,
together with the effect of abiotic factors such as temperature,
salinity and rainfall. The effect of sampling bias due
to factors such as behavioural avoidance were studied. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1991.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:ukzn/oai:http://researchspace.ukzn.ac.za:10413/11148 |
| Date | January 1991 |
| Creators | Le Sueur, David. |
| Contributors | Appleton, Christopher C. |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
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