Journal of Mosquito Research, 2012, Vol.2, No.5, 32
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38
http://jmr.sophiapublisher.com
34
Figure 2 Spatial frequency and frequency in the collected
material are often divergent in the Hungarian mosquito fauna (a:
The black line; b: The grey line) (based on the published data)
sticticus, Culiseta annulata
) [
frequencies of the
species in different stages and at different sampling
methods see in Tóth and Kenyeres (2012)]. We found
that those species of which being extremely rare based
on their contingent in all the collected specimens are
also rare based on the distributional indicators of
UTM maps (Figure 2). In other frequency categories
sometimes large differences are seen between spatial
frequency and frequency in the summed database of
the collections. Several species of the Hungarian
mosquito fauna are frequent in some parts of the
country, but generally are not common or does not
occur consistently with high individual number.
With tendential researches and evaluation of the
former data we revealed those important habitat-
variables of which determine the local occurrences
and densities of the species (Kenyeres et al., 2011),
further the structure of the larval assemblages (Bauer
et al., 2011; Kenyeres et al., 2012) (Figure 3).
The main result of the above mentioned examinations
was that larval presence and abundance of the
Hungarian mosquito species are determined mainly by
the permanent or temporal character of the breeding
sites. Almost all the further examined habitat-variables
are related to the length of the habitats’ water cover.
Species abundant in ephemeral water bodies are
usually related to clear water, lack of pondweed
vegetation and low coverage of the water surface.
Then again species abundant in permanent water
habitats are usually related to cloudy water, presence
of pondweed vegetation and high coverage of the
Figure 3 Local frequencies of the mosquito species are
determined mainly by the permanent or temporal character of
the breeding sites based on the detected positive relationships
water surface. In connection with several species, e.g.
Culex pipiens pipiens
is very common both in
statistical and spatial aspects, we have not found any
habitat requirement limiting species density or
occurrences.
The most important features of the Hungarian
mosquito life-form diversity are seen on Figure 4. 33
from the 50 recorded species belong to three
life-form-types: (a) hibernate in egg state, feeding on
mammals, univoltine (13 species); (b) hibernate in
imago state, feeding on mammals, multivoltine (11
species); (c) hibernate in egg state, feeding on
mammals, multivoltine (9 species).