Articles by Keyword: Gonad Histology

Search results for Gonad Histology

We found 28 results for you
  1. Aspects of reproduction of the brown mussel <em>Perna perna</em> at the Iture rocky beach near Cape Coast, Ghana

    Aspects of reproduction of the brown mussel <em>Perna perna</em> at the Iture rocky beach near Cape Coast, Ghana

    Item type: Journal Article • Journal: African Journal of Marine Science
    Aspects of the reproductive biology of the brown mussel Perna perna at the Iture rocky beach near Cape Coast, Ghana, were studied from September 2014 to August 2015. The current study was aimed at providing information useful for managing the...
  2. Life-history traits of seabream <em>Boops boops</em> (Linnaeus, 1758) in the central eastern Atlantic Ocean (Canary Islands)

    Life-history traits of seabream <em>Boops boops</em> (Linnaeus, 1758) in the central eastern Atlantic Ocean (Canary Islands)

    Item type: Journal Article • Journal: African Journal of Marine Science
    Life-history traits of the sparid Boops boops are studied for the first time in an isolated Atlantic population. Boops boops is a hermaphrodite species characterised by late gonochorism or non-functional hermaphroditism. The 1:0.852 ratio of females to males was significantly...
  3. Hypersensitivity of rust resistance in lentil

    Hypersensitivity of rust resistance in lentil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Characterising resistance at different levels of expression is important in understanding host defence mechanisms and the improvement of durable disease resistance in crop plants. Histological reactions of the lentil cultivars EL-142 (susceptible) and Gudo (resistant) to infection by Uromyces viciae-fabae,...
  4. Reproduction and recruitment patterns of the surf clam <em>Donax serra</em> (Bivalvia, Donacidae) on two Namibian sandy beaches

    Reproduction and recruitment patterns of the surf clam <em>Donax serra</em> (Bivalvia, Donacidae) on two Namibian sandy beaches

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Reproduction and recruitment of the surf clam Donax serra on two Namibian beaches were studied over a period of two years. Histological examination of the gonads indicated a discontinous annual reproductive cycle, related to monthly mean sea surface temperature. The...
  5. Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

    Histopathological changes in two potential indicator fish species from a hyper-eutrophic freshwater ecosystem in South Africa: a baseline study

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Histopathological changes were identified in selected target organs from two freshwater fish species, Clarias gariepinus and Oreochromis mossambicus, inhabiting the hyper-eutrophic Roodeplaat Dam near Pretoria. A histology-based fish health assessment protocol was used, including a semiquantitative histopathological assessment of the...
  6. Health of sharptooth catfish <em>Clarias gariepinus</em> in Pongolapoort Dam, South Africa: a comprehensive study

    Health of sharptooth catfish <em>Clarias gariepinus</em> in Pongolapoort Dam, South Africa: a comprehensive study

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    A histology-based fish health assessment protocol was used in 2009–2010 to assess the health status of Clarias gariepinus from Pongolapoort Dam, South Africa. Nineteen fish were collected by angling. The histology of liver, kidney, gills and testes or ovaries was...
  7. Metal contamination of sediments and fish from the Vaal River, South Africa

    Metal contamination of sediments and fish from the Vaal River, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Mining and other economic activities have led to the pollution of the Vaal River with metals of mainly industrial origin, but the consequences of this for animal and human health are unknown. Based on chemical analysis and histological examination, we...
  8. Gonadal cycle of the dwarf oyster <em>Ostreola stentina</em> from the south of the Gulf of Hammamet on the eastern coast of Tunisia

    Gonadal cycle of the dwarf oyster <em>Ostreola stentina</em> from the south of the Gulf of Hammamet on the eastern coast of Tunisia

    Item type: Journal Article • Journal: African Journal of Marine Science
    The reproductive cycle of the dwarf oyster Ostreola stentina (Payraudeau 1826) at Monastir in the south of the Gulf of Hammamet on the east coast of Tunisia was studied using condition indices and histological techniques. The species was shown to...
  9. Reproductive and feeding biology of the endangered fiery redfin, <em>Pseudobarbus phlegethon</em> (Barnard 1938) (Teleostei: Cyprinidae), in the Noordhoeks River, South Africa

    Reproductive and feeding biology of the endangered fiery redfin, <em>Pseudobarbus phlegethon</em> (Barnard 1938) (Teleostei: Cyprinidae), in the Noordhoeks River, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The aim of this study was to contribute to the knowledge on the reproductive and feeding biology of the endangered Pseudobarbus phlegethon (Barnard 1938) in the Olifants River system, by providing estimates of its maturity, reproductive periodicity and the diet...
  10. Histological changes in the gills of <em>Clarias gariepinus</em> (Teleostei: Clariidae) from a polluted South African urban aquatic system

    Histological changes in the gills of <em>Clarias gariepinus</em> (Teleostei: Clariidae) from a polluted South African urban aquatic system

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    A semi-quantitative histological assessment was used to investigate histological changes in the gills of Clarias gariepinus from Marais Dam and Rietvlei Dam near Pretoria, which receive effluent from sewage treatment plants and industries, as well as runoff from informal settlements...