Articles by Author: H L Jerling

Search results for H L Jerling

We found 21 results for you
  1. Plankton distribution and abundance in the Sundays River estuary, South Africa, with comments on potential feeding interactions

    Plankton distribution and abundance in the Sundays River estuary, South Africa, with comments on potential feeding interactions

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Three mysid and three calanoid copepod species dominated the mesozooplankton in the Sundays River estuary, South Africa. Mid estuary, there was considerable overlap in the spatial and temporal distribution of species. Mesozooplankton abundance was lowest during winter. Microzooplankton, consisting of...
  2. RELATIVELY NEGATIVE δ<sup>13</sup>C RATIOS OF MESOZOOPLANKTON IN THE SUNDAYS RIVER ESTUARY, COMMENTS ON POTENTIAL CARBON SOURCES

    RELATIVELY NEGATIVE δ<sup>13</sup>C RATIOS OF MESOZOOPLANKTON IN THE SUNDAYS RIVER ESTUARY, COMMENTS ON POTENTIAL CARBON SOURCES

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Mesozooplankton, submergent and fringing macrophytes and particles suspended in the water column in the Sundays River estuary South Africa were analyzed for δ13C isotope ratios. Highly negative values (−28.3‰ to −32.0‰) for the mesozooplankton species suggest the possibility of phytoplankton...
  3. ZOOPLANKTON OF THE MHLATHUZE (RICHARDS BAY) ESTUARY: AN OVERVIEW, WITH COMMENTS ON FRESHWATER REQUIREMENTS

    ZOOPLANKTON OF THE MHLATHUZE (RICHARDS BAY) ESTUARY: AN OVERVIEW, WITH COMMENTS ON FRESHWATER REQUIREMENTS

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The Mhlathuze estuary in its present form was established during construction of the Richards Bay harbour during the early 1970s. This paper summarises available data on the zooplankton community as part of a study on the freshwater requirements of the...
  4. Zooplankton community changes in Nhlabane estuary, South Africa, induced by man-made structures and drought

    Zooplankton community changes in Nhlabane estuary, South Africa, induced by man-made structures and drought

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Nhlabane estuary and coastal lake system has suffered a number of man-made impacts since 1977, when the lake and estuary were separated by the construction of a barrage. More recent man-made events included the construction of temporary sand walls,...
  5. Fish assemblages in the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa, when not linked to the St Lucia mouth

    Fish assemblages in the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa, when not linked to the St Lucia mouth

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The fish community of the Mfolozi–Msunduzi estuarine system was investigated with particular emphasis on its role as a nursery area for marine fish when the adjacent St Lucia mouth is closed. The mouth was open during March 2007 and 2008...
  6. Initial characterisation of the mesozooplankton community of the Mfolozi– Msunduzi estuarine system, KwaZulu-Natal, South Africa, during a low-flow period

    Initial characterisation of the mesozooplankton community of the Mfolozi– Msunduzi estuarine system, KwaZulu-Natal, South Africa, during a low-flow period

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The mesozooplankton of the Mfolozi and Msunduzi estuaries, which share a combined mouth, was sampled twice per year during a two-year period of relatively low river flow. Samples were collected during March, after the rainy season when the estuary mouth...
  7. The potential for zoobenthic fauna dispersal into the St Lucia Estuary from the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa

    The potential for zoobenthic fauna dispersal into the St Lucia Estuary from the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The onset of a prolonged drought in the St Lucia catchment in 2002 and subsequent mouth closure raised concern for the biota of the estuary. Ezemvelo KZN Wildlife proposed a scheme whereby the Mfolozi–Msunduzi mouth would be closed, causing fresh...
  8. Ecological status and role of the Mfolozi–Msunduzi estuarine system within the iSimangaliso Wetland Park, a World Heritage Site on the south-east coast of South Africa

    Ecological status and role of the Mfolozi–Msunduzi estuarine system within the iSimangaliso Wetland Park, a World Heritage Site on the south-east coast of South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The original structure and functioning of the historical Mfolozi–St Lucia estuarine system are described and anthropogenic impacts, which resulted in the Mfolozi and Msunduzi rivers being separated from the St Lucia Estuary and having their own combined mouth to the...
  9. Effect of feeding frequency and feeding rate on growth of <em>Oreochromis mossambicus</em> (Teleostei: Cichlidae) fry

    Effect of feeding frequency and feeding rate on growth of <em>Oreochromis mossambicus</em> (Teleostei: Cichlidae) fry

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The effect of feeding frequency and feeding rate on growth of Oreochromis mossambicus fry was investigated over 30 d under temperature- and light-cycle-controlled conditions on the University of Zululand campus, South Africa, in October and November 2009. Weight gain, specific...
  10. The Zooplankton Community of the Mhlathuze (Richards Bay) Estuary: Two Decades After Construction of the Harbour

    The Zooplankton Community of the Mhlathuze (Richards Bay) Estuary: Two Decades After Construction of the Harbour

    Item type: Journal Article • Journal: African Journal of Marine Science
    The Mhlathuze (Richards Bay) Estuary on the KwaZulu-Natal coast, South Africa, was substantially altered during the early 1970s, when it was divided into two separate systems. The northern section was developed into a deep-water harbour, whereas the southern part was...