Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"marine research"”.
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A marine research lab in Maine : building coastal identity
… benefits, what are its limits? The program is a marine research laboratory located on a tidal river in mid-coast Maine. I have chosen the Maine coast as a case study for its strength of individuality and relative isolation from suburban influences. Civilization is marching steadily onward, and …
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Reconstituting a World: Constructing a Cube
… into the composition and construction of a marine research laboratory situated on a remote sea cliff off the coast of Norway. The settlement is composed as a model of the world. Located at the chaotic boundary of earth, sea and sky, the <br />construction acts against these forces as …
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Tracking an underwater target
… vehicles are becoming an important part in marine research. In order to help bring down the cost of running a research mission with an autonomous underwater vehicle (AUV), the method of tracking the AUV can be improved. An autonomous surface vessel (ASV), equipped with both acoustic …
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Investigation of tropospheric arctic aerosol and mixed-phase clouds using airborne lidar technique
… built at Alfred-Wegener-Institute for Polar and Marine Research (AWI) in Potsdam, Germany for the lower tropospheric aerosol and cloud research under tough arctic conditions. The system was successfully used during two AWI airborne field campaigns, ASTAR 2004 and SVALEX 2005, performed in …
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Sea-state interaction based dynamic model of the Liquid Robotics' Wave Glider: Modelling and control of a hybrid multi-body vessel
A new class of unmanned marine research vessels makes use of wave propulsion to minimise energy requirements during voyages. Existing models of these hybrid sea-surface and underwater craft have not considered if the platform’s interaction with the immediate surrounding sea could be incorporated to …
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Estimates of Phytoplankton carbon from high resolution optical sensors in the Southern Ocean
… response and highlighted the need for more research in this region. Although M13 has a very low chl-a:Cphyto ratios, the range of variability was similar to that of the 30%POC and B05 methods and likely driven by variability in light and Fe limitation and changes in community structure. …
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Glacial-interglacial variations of the water masses in the southeast Atlantic Ocean derived from foraminiferal neodymium isotope ratios
… ambient bottom water values. However, more research is needed to further support these findings. While the Holocene samples' εNd ratios (εNd(N36/6a) -10.7±0.3 and εNd(N42/6a mean) -10.2±0.4) lie within the range of modern Eastern NADW (εNd(modern ENADW) -10.9±1.2), glacial samples yield …
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Quantitative fish survey of the submarine canyons of the iSimangaliso Wetland Park
… studies of fish species associated with the submarine canyons of the north east coast of South Africa. These canyons offer protection to coelacanths Latimeria chalumnae, fish of commercial importance, and a number of protected and endemic species. A fish survey was conducted by remotely operated …
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The commercial beach-seine fishery in False Bay, South Africa
This study was initiated in response to allegations by the conservation lobby that the commercial beach-seine fishery in False Bay was jeopardizing fish stocks and detrimentally affecting the ecology of the Bay. Its main aims were to quantify the current catch and place it in an historical …
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Variation in chemical components of aquacultured Ulva (Chlorophyta) in response to environmental variables
… biology and chemical composition is included. Marine algae are known to produce a wide range of volatile organic compounds that are primarily used in chemical communications. These compounds are released in seawater and act as either pheromones or allelochemicals. Aldehydes have been reported …
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A survey of the metazoan parasite assemblage of snoek, Thyrsites atun (Euphrasen, 1791), off South Africa with an assessment of host-parasite relationships and potential biological tags
Parasites are a ubiquitous but often unseen, unacknowledged and understudied component of biological communities. However, their roles in structuring ecosystems, their influence on the evolutionary history of host species and their potential applications are slowly being uncovered. The snoek, …
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Bacterioplankton dynamics in the Southern Benguela upwelling region
The role of heterotrophic bacteria in the carbon and nitrogen flux of the pelagic food web was investigated during laboratory and field-based studies of the temporal development of the planktonic community after upwelling. Bacterial community structure, activity and production were closely coupled …
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Seasonality of the Agulhas Current with respect to near- and far-field winds
The Agulhas Current plays a critical role in both local and global ocean circulation and climate regulation, yet the mechanisms that determine the seasonal cycle of the current remain poorly understood. Model studies predict an austral winter-spring maximum in poleward volume transport, whilst …
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The biology and macroparasites of the sixgill sawshark Pliotrema warreni
Thirty-two specimens of the sixgill sawshark, Pliotrema warreni, were trawled near Bird Island in Algoa Bay on the Eastern coast of South Africa in April and May 2015. The specimens were examined for anatomical proportions, reproductive characteristics, diet, and parasite assemblages. Several …
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Habitat association and distribution of Nauticaris marionis at the Sub-Antarctic Prince Edward Islands
The habitat associations between the caridean shrimp Nauticaris marionis and sessile epibenthic assemblages and substratum types of the Sub-Antarctic Prince Edward Islands were investigated. Twenty five stations, varying in substratum type, depth and location on the shelf and slope around the …
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The environmental factors determining temporal distributions of cetaceans in Mossel Bay, South Africa
A variety of cetacean species make use of the bays along the South African coast for different purposes, including feeding, mating and calving. Sightings of five species of cetaceans were recorded from shore based locations between February 2010 and August 2014 in Mossel Bay, Western Cape. In this …
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The development and decline of phytoplankton blooms in the southern Benguela upwelling region
[page ii, 27 missing] These "Redfield productivity 14 estimates" were similar to C-uptake productivity but lower than estimates obtained from changes in particle volume. If the period of maximum nutrient decrease was used for the calculations, the "Redfield productivity 14 estimates" lie between …
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Considering one's option when the fish leave: a case study of the traditional commercial handline fishery of the Southern Cape
… processes. To this end, participant-led research was conducted in six communities in the Southern Cape, where 50 participants were interviewed over a period of 6 months in 2013/2014. The interviews were an attempt to gather and record perceptions and knowledge regarding stressors that are …
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Interactive effects of temperature and grazing by seagrass limpets (Siphonaria compressa and Fissurella mutabilis) on seagrass (Zostera capensis)
… by the end of 2050 with dramatic impacts on marine ecosystems predicted around the world. Seagrass ecosystems are a good example of vital ecosystems that are threatened by climate change and other anthropogenic factors. A decline in global seagrass cover of 29% has been estimated over the …
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