Global ETD Search
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Showing 1 to 14 of 14 for “"Choromytilus meridionalis"”.
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Ecophysiology of the black mussel Choromytilus meridionalis (Krauss)
… respiration and assimilation of the black mussel Choromytilus meridionalis (Kr.) at Bailey's Cottage, False Bay, South Africa. The reproductive season and gonad development is described from monthly measurements made over a period of 4 years. Spawning usually extends from July to February and is …
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Assessment of trace metals pollution along the Central Namibian marine coastline: using Choromytilus Meridionalis (Black Mussel) as indicator organisms.
… Cross) to assess trace metals pollution using Choromytilus meridionalis as indicator organism. Samples were collected using randomized sampling techniques during winter and summer months of 2012. EPA 3050B and ICP-OES protocols were used to digest and assimilate the samples. Data were analysed …
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The effects of microplastic and natural particles on the invasive mussel Mytilus galloprovincialis (Lamarck, 1819) and the native Choromytilus meridionalis
… will be compared to those on the native mussel Choromytilus meridionalis, which resides on the low shore, and unlike M. galloprovincialis often occurs in areas prone to sand inundation. Respiration rates, byssus production, clearance rate, body condition (BCI) and survival of mussels exposed to …
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Toxigenic phytoplankton and concomitant toxicity in the mussel Choromytilus meridionalis off the west coast of South Africa in the autumn of 2007
… of toxins in the filter-feeding mussel Choromytilus meridionalis, was investigated. Several different methods were used to determine toxin concentations in the mussel.
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Marine invertebrate sperm: assessment of sperm quality using computer-aided sperm analysis
… namely Parechinus angulosus (Echinoidea), Choromytilus meridionalis (Bivalvia), Crassostrea gigas (Bivalvia), Donax serra (Bivalvia) and Haliotis midae (Gastropoda) were investigated. The sperm morphology and base-line data were gathered concerning the sperm concentration, motility and …
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The physiology of digestion in marine mussels : a study in environmental adaptation
The black mussel Choromytilus meridionalis (Krauss) forms an important link in the food chain of the South African west coast kelp beds, transferring energy from macrophyte debris, phytoplankton and bacteria to major predators such as the rock-lobster Jasus lalandii. Although a large body of work …
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Biologically induced alternative states in two rocky subtidal benthic communities
… Island has prolific beds of the black mussel Choromytilus meridionalis, accompanied by a large number of other species, notably the sea urchin Parechinus angulosus, the holothurians Pentacta doliolum, Thyone aurea and Trachythyone insolens, large population of whelks, mostly Burnupena spp. and …
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Relation of crystalline style function to food availability and environmental conditions in South African mussels
The mussels Choromytilus meridionalis, Mytilus galloprovincialis, Perna perna and Aulacomya ater are important and often dominant organisms on the littoral and sublittoral shores of the South Africa. M. galloprovincialis has only recently been identified as a separate species, but a cons1derable …
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Baseline surveys and metal binding proteins as metal pollution indicators
… shrimp, Palaemon pacificus; black mussel, Choromytilus meridionalis and limpet, Patella granularis) kept under identical conditions and it was shown that a much more meaningful interpretation of the results could be made. The new definition was al so tested with two naturally occurring …
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Interactive effects of pH, temperature and exposure period on native and invasive mussels from the West Coast of South Africa
… force and condition index of Aulacomya ater, Choromytilus meridionalis (both native), Mytilus galloprovincialis and Semimytilus algosus (both invasive) found on the Western Cape coast of South Africa. Live mussels and bare shells were exposed to seawater temperatures of 14°C and 20°C set at …
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Selected molluscs as monitors of metal pollution in coastal marine environments
… gigas, Crassostrea margaritacea, Perna perna and Choromytilus meridionalis. Metal concentrations in these and other species living along an unpolluted coast have been determined by atomic absorption spectrometry following chemical oxidation of the biological tissues. Variations in concentrations …
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Aspects of pollution in False Bay, South Africa (with special reference to subtidal pollution)
… discharge. Toxicity experiments on the bivalves Choromytilus meridionalis, Mytilus galloprovincialis and Perna perna using alum and ferric sludge indicate that there are no significant short-term sub-lethal toxic effects on the rocky shore bivalves and that decreased salinities in the immediate …
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Comparative ecology and physiology of four South African mussel species with notes on culture potential
… South African marine mussels - Aulacomya ater, Choromytilus meridionalis, Mytilus galloprovincialis and Perna perna. The first chapter is a preliminary account of the introduction of the invasive M. galloprovincialis, and its ecological effects. Its rate of invasion is estimated by monitoring …
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The application of active and passive bioaccumulation methods to measure metallic and organic pollutants along the Namibian coastline
… resident- and transplanted mussel bioindicators (Choromytilus meriolionalis) were deployed at two exposure sites (Walvis Bay Harbour & Swakopmund) for six weeks. Element concentrations (Al, As, Cd, Co, Cu, Fe, Mn, Mo, Ni, Pb, Se, U, and Zn) were determined using inductively coupled plasma mass …