Seasonal compositions of monogenean parasites fromPsedocrenilabrus philander (Weber, 1897) in the middle LimpopoRiver Basin (South African region)
2015
The Southern mouthbrooder, P. philander, with its opalescent
blue and pale yellow colours could become an important
ornamental fish. Its distribution in southern African region
covers the Orange River and southern KwaZulu-Natal Province
northwards throughout the region and extends to southern Congo
tributaries and Lake Malawi. In South Africa, P. philandar has
been spread unnaturally since its introduction in 1941, as a
consequence of the transportantion beyond limit of native range
and direct releasing into novel environments. Fish were
collected using an electroshocker during two seasons, July 2013
(winter, W) and January 2014 (summer, S), from two sampling
spots, representing tributaries of Limpopo River from both
Zimbabwean (ZIM) and South African (SA) sides where 20
specimens from each locality and sampling season were sampled.
The localities were Nwanedi River, Nwanedi Nature Reserve (SA)
and Bubi River, Bubiana Conservatory (ZIM). The fish were
examined in a field laboratory and recovered monogeneans were
fixed in glycerin ammonium picrate solution. Morphometric
analysis of the hard structures of the attachment organs and
male copulatory organs reaveled presence of monogenean
parasites representing three genera. The only species of
viviparous parasites of the genus Gyrodactylus von Nordmann,
1832 was recorded from the fins during the summer in SA and
from only one fish. In the stomach, the infections of
endoparasitic monogeneans of the genus Enterogyrus Paperna,
1963 were recorded in S-SA and W-ZIM with a prevalence of 35%
in both cases, and identified as Enterogyrus coronatus
Pariselle, Lambert & Euzet, 1991. Four species of the genus
Cichlidogyrus Paperna, 1960 were recorded from the gills. The
species composition and prevalences differed significantly
between the localities and sampling seasons.
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