Articles by Author: R Perissinotto

Search results for R Perissinotto

We found 17 results for you
  1. Phytoplankton/protozoan dynamics in the Nyara Estuary, a small temporarily open system in the Eastern Cape (South Africa)

    Phytoplankton/protozoan dynamics in the Nyara Estuary, a small temporarily open system in the Eastern Cape (South Africa)

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Most estuarine studies in South Africa have focused on larger estuaries, while numerous, smaller, temporarily open estuaries have received little research attention. This study examines the phytoplankton distribution in relation to physical and chemical variables through a quasi-seasonal cycle (from...
  2. Recovery dynamics of zooplankton following mouth-breaching in the temporarily open/closed Mdloti Estuary, South Africa

    Recovery dynamics of zooplankton following mouth-breaching in the temporarily open/closed Mdloti Estuary, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Mouth-breaching events have major impacts on biological processes in temporarily open/closed estuaries. The aim of this investigation was to monitor zooplankton recovery dynamics following artificial breaching of the Mdloti Estuary in February 2004. Spatial and temporal patterns in zooplankton distribution...
  3. Flood effects on trophic linkages of selected fish species in the littoral zone of the St Lucia estuarine system, South Africa

    Flood effects on trophic linkages of selected fish species in the littoral zone of the St Lucia estuarine system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The St Lucia Estuary, a UNESCO World Heritage Site, has experienced prolonged mouth closure since 2002. Until recently it was hypersaline, but heavy rainfall between October 2010 and January 2011 led to a large overall decrease in salinity. A stable...
  4. Nitrogen uptake dynamics of a persistent cyanobacterium <em>Cyanothece</em> sp. bloom in Lake St Lucia, South Africa

    Nitrogen uptake dynamics of a persistent cyanobacterium <em>Cyanothece</em> sp. bloom in Lake St Lucia, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Worldwide, persistent cyanobacterial blooms are becoming more frequent and are often associated with effects of global climate change. In June 2009, a widespread bloom of the unicellular cyanobacterium, Cyanothece sp., appeared in North Lake and False Bay of Lake St...
  5. Microalgal responses to physico-chemical variability in the small temporarily open/closed Seteni Estuary, South Africa

    Microalgal responses to physico-chemical variability in the small temporarily open/closed Seteni Estuary, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Seteni Estuary is a small temporarily open/closed estuary (TOCE) in South Africa under the influence of agricultural practices. While the general significance of microalgae to estuarine production is widely recognised, the factors regulating microalgal biomass in these heterogeneous systems...
  6. Decline of <em>Terebralia palustris</em> in South African mangroves

    Decline of <em>Terebralia palustris</em> in South African mangroves

    Item type: Journal Article • Journal: African Journal of Marine Science
    Terebralia palustris (Linnaeus, 1767), the giant mangrove whelk, is a prominent component of mangrove ecosystem malacofauna in the Indo-West-Pacific region. On the east coast of Africa, the range of T. palustris extends from Kenya to the south-eastern region of South...
  7. <em>In situ</em> growth rate of <em>Solen cylindraceus</em> (Mollusca: Euheterodonta: Solenidae) in the St Lucia estuarine lake, South Africa

    <em>In situ</em> growth rate of <em>Solen cylindraceus</em> (Mollusca: Euheterodonta: Solenidae) in the St Lucia estuarine lake, South Africa

    Item type: Journal Article • Journal: African Zoology
    Solen cylindraceus, an infaunal bivalve, can reach a maximum length of 95 mm. However, in the St Lucia estuarine system specimens are seldom larger than 55 mm. Thus, the primary aim of this study was to investigate the growth rate...
  8. Meso-zooplankton movement through the newly constructed Mfolozi channel into and out of the St Lucia Estuary, South Africa

    Meso-zooplankton movement through the newly constructed Mfolozi channel into and out of the St Lucia Estuary, South Africa

    Item type: Journal Article • Journal: African Zoology
    The historical canalization of the Mfolozi River resulted in the St Lucia Estuary losing its main freshwater source. This, combined with the recent drought, led to low water levels, hypersaline conditions and dramatic losses in biodiversity. The excavation of a...
  9. Dynamics of recruitment of larval and juvenile Cape stumpnose <em>Rhabdosargus holubi</em> (Teleostei: Sparidae) into the Swartkops and Sundays estuaries, South Africa

    Dynamics of recruitment of larval and juvenile Cape stumpnose <em>Rhabdosargus holubi</em> (Teleostei: Sparidae) into the Swartkops and Sundays estuaries, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Recruitment of early life stages into estuaries is an integral part of the life cycle of many marine fish species. Although estuaries are naturally environmentally dynamic, they also are subject to anthropogenic disturbances, including land use and climate change, which...
  10. Plant selection and grazing activity of the invasive snail <em>Theba pisana</em> in coastal Algoa Bay, South Africa

    Plant selection and grazing activity of the invasive snail <em>Theba pisana</em> in coastal Algoa Bay, South Africa

    Item type: Journal Article • Journal: African Zoology
    The land snail Theba pisana is a coastal species native to the Mediterranean but has been introduced to regions all over the world, including South Africa and Australia, where it is considered a pest. This study examines the diet of...