Articles by Keyword: Pigment Biomarkers

Search results for Pigment Biomarkers

We found 15 results for you
  1. Environmental influence on phytoplankton communities in the northern Benguela ecosystem

    Environmental influence on phytoplankton communities in the northern Benguela ecosystem

    Item type: Journal Article • Journal: African Journal of Marine Science
    An investigation of surface phytoplankton communities was undertaken on the shelf of the northern Benguela upwelling ecosystem during austral autumn (May) and spring (September), along latitudinal transects at 20° S and 23° S, from 2 to 70 nautical miles offshore,...
  2. Gill damage, metallothionein gene expression and metal accumulation in <em>Tilapia sparrmanii</em> from selected field sites at Rustenburg and Potchefstroom, South Africa

    Gill damage, metallothionein gene expression and metal accumulation in <em>Tilapia sparrmanii</em> from selected field sites at Rustenburg and Potchefstroom, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Fish were collected from field sites in the mining and agricultural areas of Potchefstroom and Rustenburg, North-West Province, South Africa. Water and sediment samples from each site, together with fish muscle and gills, were analysed by Inductively Coupled Plasma Mass...
  3. Accumulation of hepatic Hsp70 and plasma cortisol in <em>Oreochromis mossambicus</em> following sublethal metal and DDT exposure

    Accumulation of hepatic Hsp70 and plasma cortisol in <em>Oreochromis mossambicus</em> following sublethal metal and DDT exposure

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Heat shock response in Oreochromis mossambicus livers was measured, using antibodies specific to Hsp70 family members, by an immunoblotting protocol. The hepatic isoforms Hsp70, Hsp74 and Hsp76 were identified and quantified from copper exposures. Long-term DDT exposure did not result...
  4. Seasonal variation in phytoplankton in the southern Benguela: pigment indices and ocean colour

    Seasonal variation in phytoplankton in the southern Benguela: pigment indices and ocean colour

    Item type: Journal Article • Journal: African Journal of Marine Science
    Pigment indices and satellite imagery were used to investigate the seasonal variation in phytoplankton in the southern Benguela, with the aid of monthly monitoring on two transect lines. Sea surface temperature images revealed the similarity in thermal conditions during autumn,...
  5. Pigment profile and toxin composition during a red tide of <em>Gymnodinium catenatum</em> Graham and <em>Myrionecta rubra</em> (Lohman) Jankowski in coastal waters off Mar del Plata, Argentina

    Pigment profile and toxin composition during a red tide of <em>Gymnodinium catenatum</em> Graham and <em>Myrionecta rubra</em> (Lohman) Jankowski in coastal waters off Mar del Plata, Argentina

    Item type: Journal Article • Journal: African Journal of Marine Science
    Microscope observations of samples, collected in autumn 2003 during a red tide in the coastal waters of Mar del Plata, Argentina, suggest that the phytoplankton community consisted mainly of the chain-forming dinoflagellate Gymnodinium catenatum (89 000 cells l−1). However, the...
  6. Pigment signatures of phytoplankton composition in the northern Benguela ecosystem during spring

    Pigment signatures of phytoplankton composition in the northern Benguela ecosystem during spring

    Item type: Journal Article • Journal: African Journal of Marine Science
    Pigment indices were used to investigate the distribution and composition of phytoplankton in the northern Benguela during the austral spring of 2000, with sampling being conducted on five transect lines between 19°S and 25°S and at other inshore stations on...
  7. Cellular responses of the starfish <em>Parvalustra exigua</em> to metal pollution in False Bay, South Africa

    Cellular responses of the starfish <em>Parvalustra exigua</em> to metal pollution in False Bay, South Africa

    Item type: Journal Article • Journal: African Zoology
    The cushion sea star Parvalustra exigua from five sites along the shore of False Bay on the southern coast of South Africa was studied using two cellular biomarkers, the neutral red retention assay (NRR) and the lysosomal destabilization assay (DI)...
  8. Physiological response of one of South Africa’s premier freshwater sport angling species, the Orange-Vaal smallmouth yellowfish <em>Labeobarbus aeneus</em>, to catch-and-release angling

    Physiological response of one of South Africa’s premier freshwater sport angling species, the Orange-Vaal smallmouth yellowfish <em>Labeobarbus aeneus</em>, to catch-and-release angling

    Item type: Journal Article • Journal: African Zoology
    The practice of catch-and-release fishing has been widely promoted by angling fraternities as a fisheries manage- ment tool. The aim of this investigation was to determine the physiological response of Orange-Vaal smallmouth yellowfish, Labeobarbus aeneus, to catch-and-release angling in the...
  9. Histopathological biomarkers and genotoxicity in gill and liver tissues of Nile tilapia <em>Oreochromis niloticus</em> from a polluted part of the Nile River, Egypt

    Histopathological biomarkers and genotoxicity in gill and liver tissues of Nile tilapia <em>Oreochromis niloticus</em> from a polluted part of the Nile River, Egypt

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Fish health is affected by water pollution. Oreochromis niloticus collected during summer 2014 from El-Serw, a polluted site on the Nile River, were compared with fish from a reference site, El-Zamalek. Histopathological changes were detected in gill and liver tissue...