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Reseeding of mussels on denuded rocky shores: preliminary studies with the brown mussel Perna perna
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: A. H. Dye N. DyantyiA method is developed to establish clumps of mussels Perna perna in denuded areas on high-energy rocky shores on the south-east coast of South Africa. A total of 20 small (20–30 mm total length) mussels is placed under a 30... -
Spatial Comparisons of Populations of an Indigenous Limpet Scutellastra Argenvillei and an Alien Mussel Mytilus Galloprovincialis Along a Gradient of Wave Energy
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C. N. Steffani G. M. BranchIn the 1970s, the Mediterranean mussel Mytilus galloprovincialis invaded the South African coast and spread rapidly to dominate much of the West Coast, indicating either the opportunity to occupy a vacant niche or its superior competitive capability over indigenous species... -
Temporal Changes in an Interaction Between an Indigenous LimpetScutellastra Argenvillei and an Alien Mussel Mytilus Galloprovincialis: Effects of Wave Exposure
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C.N. Steffani G.M. BranchA previous survey of 15 sites off the Namaqualand coast on the west coast of South Africa provided evidence of a competitive interaction between an alien mussel Mytilus galloprovincialis and an indigenous limpet Scutellastra argenvillei, and indicated that wave action... -
Morphological identification of primary settlers and post-larvae of three mussel species from the coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Bownes NP Barker CD McQuaidThe study of mussel settlement and recruitment requires the ability to identify the larvae of co-existing species. On the south coast of South Africa, an introduced (Mytilus galloprovincialis) and two indigenous (Choromytilus meridionalis and Perna perna) mussel species co-exist and... -
Biogeographical patterns in the fauna associated with southern African mussel beds
Item type: Journal Article • Journal: African Zoology • Authors: Wendy Hammond --- Centre for Invasion Biology and Marine Biology Research Institute, University of Cape Town, South Africa Charles Griffiths --- Centre for Invasion Biology and Marine Biology Research Institute, University of Cape Town, South AfricaMacrofauna communities colonizing intertidal mussel beds were sampled at seven sites between Swakopmund (Namibia) and Salt Rock (KwaZulu-Natal). Mean mussel cover, length, biomass and bed depth were all low in the southeast (former Transkei). Faunal abundance and biomass were minimal... -
Trends in African Black Oystercatcher Haematopus moquini populations between the early 1980s and early 2000s, with consideration of the influence of protected habitats and food availability
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Douglas Loewenthal --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Dane M Paijmans --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip W Haupt --- Seychelles Islands Foundation, Republic of Seychelles Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaThe African Black Oystercatcher Haematopus moquini is classified as Near Threatened because the population size is small (<10 000) and numbers have decreased or were previously recorded as decreasing. Although human activity has increased in many parts of the species’... -
Saldanha Bay, South Africa III: new production and carrying capacity for bivalve aquaculture
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TA Probyn --- Aquaculture Research, Department of Agriculture, Forestry and Fisheries, South Africa JF Atkins --- Department of Oceanography, South Africa GC Pitcher --- Aquaculture Research, Department of Agriculture, Forestry and Fisheries, South AfricaMeasurements of NH4, NO3, urea and HCO3 uptake using 15N and 13C stable isotope tracers were undertaken in Saldanha Bay, South Africa, between January 2012 and January 2013. These studies provide the first direct measurements of N utilisation by the... -
The invasive Asian green mussel Perna viridis in South Africa: all that is green is not viridis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JM Micklem --- Centre for Invasion Biology, Department of Biological Sciences, South Africa CL Griffiths --- Centre for Invasion Biology, Department of Biological Sciences, South Africa N Ntuli --- South African Institute for Aquatic Biodiversity, South Africa M Mwale --- South African Institute for Aquatic Biodiversity, South AfricaThe Asian green mussel Perna viridis is an invasive Indo-Pacific species recently reported from South African harbours. To verify the invasion, a phylogenetic (and morphological) analysis of green-shelled mussels (n = 39), found in six South African harbours, was conducted... -
The recovery and molecular identification of HAdV-D17 in raw sewage and mussel samples collected in the Eastern Cape province of South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Hillary J Vos --- Department of Biochemistry and Microbiology, South Africa Caroline M Knox --- Department of Biochemistry and Microbiology, South AfricaHuman adenoviruses (HAdV) are a common cause of clinical infections in South Africa. However, there is a lack of information regarding the prevalence and molecular identification of this virus in the environment. The objective of this study was to investigate... -
Shell morphometrics and growth rate of the invasive bivalve mollusc Mytilus galloprovincialis in the Knysna estuarine embayment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AN Hodgson --- Department of Zoology & Entomology, South Africa L Claassens --- Department of Zoology & Entomology, South Africa S Kankondi --- Department of Zoology & Entomology, South AfricaShell morphometrics of the invasive mussel Mytilus galloprovincialis were compared at five sites and growth rate at four sites (in four seasons) in the Knysna estuarine embayment. Mussels from two sites (The Heads, Leisure Isle) where wave action was present... -
Sustainable shellfish aquaculture in Saldanha Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Santa Marta --- , United Kingdom JG Ferreira --- , United Kingdom GC Pitcher --- , South Africa J Lencart e Silva --- , United KingdomThe carrying capacity for bivalve shellfish culture in Saldanha Bay, South Africa, was analysed through the application of the well-tested EcoWin ecological model, in order to simulate key ecosystem variables. The model was set up using: (i) oceanographic and water-quality... -
Trends in mussel cover, density and size at exploited and unexploited intertidal reefs in eastern South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Steyn --- , South Africa JC Groeneveld --- , South Africa J Santos --- , Norway XI Mselegu --- , South AfricaThe brown mussel Perna perna is the dominant indigenous mussel along the east coast of South Africa, where it is harvested by recreational and subsistence fishers. High fishing pressure near urban areas led to declining abundance and consequently to the... -
Standardising English and Afrikaans common names for polychaetes harvested as bait in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Carol A Simon --- , South Africa Alheit N du Toit --- , South Africa Stephen J Lamberth --- , South Africa George M Branch --- , South AfricaPolychaete worms are used widely as bait in South Africa, but common names are not used consistently among fishers or in the literature. This can have implications for conservation, since different polychaete species will not be equally vulnerable to exploitation,... -
Magellan mussels Aulacomya atra from the South African coast show high diversity within populations but a lack of geographic differentiation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JP Grobler --- University of the Free State, South Africa Z Zhao --- University of the Free State, South Africa JW Jones --- , United States A Kotze --- University of the Free State, South AfricaThe Magellan mussel Aulacomya atra is a bivalve mollusc found along parts of the South African and Namibian coastline. Its numbers were low historically compared with other indigenous species but have decreased further since the 1970s owing to habitat invasion... -
Variations in the heart rate of Mediterranean mussels Mytilus galloprovincialis and brown mussels Perna perna under thermal stress on rocky shores of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Beine --- University of Johannesburg, South Africa LJ Connell --- University of Johannesburg, South Africa R Greenfield --- University of Johannesburg, South AfricaIntertidal mussels experience prolonged emersion during low tide, followed by rapid submergence cooling during high tide, causing temperature-induced stress responses. This study examined variations in heart rate to investigate the relationship between emerged and submerged thermal stress in Mediterranean mussels...