Articles by Author: A Avenant Oldewage

Search results for A Avenant Oldewage

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  1. Checklist of the fish parasitic genus <em>Cichlidogyrus</em> (Monogenea), including its cosmopolitan distribution and host species

    Checklist of the fish parasitic genus <em>Cichlidogyrus</em> (Monogenea), including its cosmopolitan distribution and host species

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Current knowledge of the 85 species in the genus Cichlidogyrus, collected worldwide, including their hosts, localities and authors, is summarised in a table. Although these parasites occur mainly in Africa, representatives have been recorded on cichlids in Mexico. Their distribution...
  2. Evaluation of the fish health assessment index in the Olifants River system, South Africa

    Evaluation of the fish health assessment index in the Olifants River system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The fish health assessment index (HAI) biomonitoring technique, developed in the USA and subsequently tested in South Africa, was re-evaluated in the Olifants River system using Clarias gariepinus, Oreochromis mossambicus and Labeobarbus marequensis during drought and flood conditions in 1994–1997...
  3. Application of a fish health assessment index and associated parasite index to <em>Clarias gariepinus</em> (Teleostei: Clariidae) in the Vaal River system, South Africa

    Application of a fish health assessment index and associated parasite index to <em>Clarias gariepinus</em> (Teleostei: Clariidae) in the Vaal River system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The aim of this study was to determine if the fish health assessment index (HAI) developed in the USA and associated parasite index (PI), when applied to Clarias gariepinus at two localities in the upper and middle Vaal River system,...
  4. Polychaetes

    Polychaetes

    Item type: Journal Article • Journal: African Zoology
  5. Aspects of the pathology of <em>Lamproglena clariae</em> (Copepoda: Lernaeidae) on gills of <em>Clarias gariepinus</em> from the Vaal River system, South Africa

    Aspects of the pathology of <em>Lamproglena clariae</em> (Copepoda: Lernaeidae) on gills of <em>Clarias gariepinus</em> from the Vaal River system, South Africa

    Item type: Journal Article • Journal: African Zoology
    Lamproglena clariae attaches to gill filaments of Clarias gariepinus, penetrates the gill tissue and consumes blood. Hence, the purpose of this study was to investigate the mechanical damage caused by this parasite on gill filaments of the host. Infestation intensity...
  6. An ultrastructural investigation of <em>Argulus personatus</em> Cunnington, 1913 (Crustacea: Branchiura) from Lake Tanganyika, northern Zambia

    An ultrastructural investigation of <em>Argulus personatus</em> Cunnington, 1913 (Crustacea: Branchiura) from Lake Tanganyika, northern Zambia

    Item type: Journal Article • Journal: African Zoology
    Sixteen male and one female specimen of Argulus personatus Cunnington, 1913, were collected from Bathybates ferox Boulenger, 1898, from Lake Tanganyika in northern Zambia. Light and scanning electron microscopy (SEM) examinations documented a thickening of cuticle located on the dorsal...
  7. Innovative fluorescence detection technique for metals in cestode egg-shells

    Innovative fluorescence detection technique for metals in cestode egg-shells

    Item type: Journal Article • Journal: African Zoology
    Recent work in the field of parasitology has drawn attention to the application of parasites as pollution-accumulation indicators, particularly cestodes. A discrepancy in metal concentrations within cestode posterior and anterior tissue has led researchers to attribute this phenomenon to metals...
  8. Aspects of the ecology of <em>Cichlidogyrus philander</em> collected from <em>Pseudocrenilabrus philander philander</em> from the Padda Dam, Gauteng, South Africa

    Aspects of the ecology of <em>Cichlidogyrus philander</em> collected from <em>Pseudocrenilabrus philander philander</em> from the Padda Dam, Gauteng, South Africa

    Item type: Journal Article • Journal: African Zoology
    Cichlidogyrus philander was originally described from Pseudocrenilabrus philander philander in Lake Kariba, Zimbabwe. Specimens from four fish species were collected during this study over a 14-month period from the Padda Dam, Johannesburg, transported to the laboratory and killed. Following examination,...