Els, Anja

A dissertation submitted to the Faculty of Science, University of the Witwatersrand, in fulfilment of the requirements for the Degree of Master of Science. Johannesburg, 20 January 2017. / Sand dune movements can be effectively monitored through the comparison of multitemporal satellite images. However, not all remote sensing platforms are suitable to study sand dunes. This study compares coarse (Landsat 7 and 8) and fine (Worldview 2) resolution platforms, specifically focussing on sand du...

Fabrèges, Dimitri

La variabilité est une propriété intrinsèque aux systèmes biologiques, essentielle pour l'évolution et l'embryogénèse. Souvent considérée comme du bruit, ce n'est que récemment que l'aléatoire des processus biologiques a commencé à être systématiquement étudié. Cette thèse pose les questions suivantes : qu'est-ce qu'un développement normal ? Quel est l'étendue et le rôle de la variabilité dans la robustesse et la résilience du développement embryonnaire ?Ces questions sont posées pour le lapin (...

Mudavanhu, Thabani B

This research is centred on designing a framework for application of systems engineering in non-conventional application areas. It uses the manufacturing – small and medium enterprises (SMEs) as a framing case. The system engineering approach (SEA) application and the value it brings is greatly appreciated in the traditional application areas like defence and aerospace industries, however, the SEA application in other industries particularly manufacturing has been very low. This has led to the m...

Agrios, Liana

Indiana University-Purdue University Indianapolis (IUPUI) / Tills from major ice streams (Institute, Foundation, Academy, Recovery, and Slessor) of the Weddell Sea Embayment contain detrital zircons with distinct U-Pb age populations that can be used as a provenance tool to better understand ice stream dynamics. U-Pb ages of detrital zircons were measured in 21 samples of onshore till, erratics, and bedrock of potential source rocks, and 12 samples of offshore till. Grains were analyzed by LA-IC...

Herrera, Catalina

Ceramic membranes have proven to have many advantages over polymeric membranes. Some of these advantages are: resistance against extreme pH, higher permeate flux, less frequent chemical cleaning, excellent backwash efficiency and longer lifetime. Other main advantage is the use of strong chemical agent such as Ozone (O3), to perform membrane cleaning. Ozone has proven to be a good disinfection agent, deactivating bacteria and viruses. Ozone has high oxidation potential and high reactivity with n...

AlMashharawi, Samer

With the increase in population density throughout the world and the growing water demand, innovative methods of providing safe drinking water are of a very high priority. In 2002, the United Nations stated in their millennium declaration that one of their priority goals was “To reduce by half, by the year 2015, the proportion of people who are unable to reach or to afford safe drinking water” [1]. This goal was set with high standards and requires a great deal of water treatment related researc...

Dansereau, Véronique

De récentes analyses statistiques de données satellitales et de bouées dérivantes ont révélé le caractère hautement hétérogène et intermittent de la déformation de la banquise Arctique, démontrant de ce fait que le schéma rhéologique visco-plastique utilisé traditionnellement en modélisation climatique et opérationnelle ne simule pas adéquatement le comportement dynamique des glaces ainsi que les efforts mécaniques en leur sein.Un cadre rhéologique alternatif, baptisé "Maxwell-Élasto-Fragile" (M...

Ahonen, Heidi

Le lion de mer Australien a un cycle de reproduction non-annuel et asynchrone entre les colonies.Contrairement aux autres pinnipèdes, ce système unique offre l’opportunité aux mâles de se reproduiredans plusieurs sites lors d’une saison de reproduction. L’accès des mâles à plusieurs sites dereproduction pourrait contrecarrer le fort degré de structure génétique de population chez les femellesdûe à une fidélité extrême au site de reproduction. J'ai utilisé deux méthodes indépendantes maiscompléme...

Muñoz-Royo, Carlos

Thesis: S.M. in Ocean Engineering, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018. / Cataloged from PDF version of thesis. Pages 109 and 110 blank. / Includes bibliographical references (pages 99-108). / Deep-sea mining activities are expected to commence in the next decade; the International Seabed Authority (ISA) has already issued twenty nine exploration licenses for polymetallic nodules, polymetallic sulphides and polymetallic crusts. The ISA is seeking to ...

Pålstam, Alexander

Sovereignty over the South China Sea waters and the territorial features therein has been a contentious issue since at least the 1970’s, with conflicting claims going back even further. Key concepts of Liberal and Neo-Realist International Relations Theory are used to assess respective theory’s explanatory capability for why the South China Sea Dispute is difficult to settle. The scope of the study is limited to three pairings of international relations: China-Philippines, China-Vietnam and Chin...

Fernanda Casagrande

Important international reports and a significant number of scientific publications have reported on the abrupt decline of the Arctic sea ice, polar amplification and its impact on the Global Climate System. In this thesis, we evaluate the ability of the Brazilian Earth System Model (BESM) to represent the Arctic sea ice and sensitivity to the atmospheric Carbon dioxide (CO$_{2}$) forcing. We used decadal simulations (1980-2012), future scenarios with Representative Concentration Pathway RCP 4.5...

Bruno Henrique de Moraes e Souza

The present study characterized the deep-sea gastropods community collected on whale bones and wood parcels artificially implanted in the deep Southwest Atlantic Ocean at 1500 and 3300 m depth for 23 months. A total of 5493 gastropods were collected and their distribution, abundance and diversity on substrates, depths and latitudes were calculated. Species richness and abundance of gastropods were higher in whale bones and deeper sites. Latitude did not seem to influence the distribution of moll...

by Scott P. Kelly. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1994. / Includes bibliographical references (leaves 168-190). / Acknowledgements --- p.iv / Chapter Chapter 1 : --- Introduction --- p.1 / Chapter Chapter 2 : --- Review of the literature / Part A : Nutritional requirements of fish and performance assessment / Chapter A2.1 --- Introduction --- p.5 / Chapter A2.2 --- Dietary protein requirement --- p.6 / Chapter A2.2.1 --- Factors influencing dietary protein requirement /...

Chia-Ying Tu, 杜佳穎

博士 / 國立中興大學 / 環境工程學系 / 94 / The numerical discretization for sea surface temperature (SST) simulation is presented here and shows how it can be used in a Turbulence Kinetic Energy (TKE) type ocean model to account for warm-layer and cool-skin effects. An effective surface thickness is derived for determining skin temperature. Determinations of temperatures within the cool skin are needed to reproduce the cool-skin effect. Taking this suggestion, a conventional TKE model can simulate the cool-ski...

Day, Elizabeth

Bibliography: 172-183. / Field surveys were carried out in the kelp beds of the shallow subtidal off the south western Cape of South Africa, which confirmed the existence of a strong positive relationship between the urchins Parechinus angulosus and juveniles of the abalone Haliotis midae. Both species occupied primarily hard substrates, showing preferences for encrusting corallines. Of the juvenile abalone sampled, > 98% were found beneath sea urchins. All small (3-10 mm shell length) and mediu...

Edge, Russ

The Guinea Plateau is a shallow-marine, flat-lying bathymetric province situated along the equatorial West African margin, offshore Republic of Guinea. The Guinea Plateau and the conjugate Demerara Plateau hold particular geologic significance, as they represent the final point of separation between the African and South American continents during Gondwana break-up. Recent interpretation of both 2-D and 3-D seismic surveys along the Guinean margin have illuminated subsurface features related to ...

Miranda, Priscilla J.

<p> For over 3.5Ga microbial activities have profoundly altered planetary geochemistry. In particular, sulfur-cycling hydrothermal vent communities have been important players in shaping biogeochemistry and the habitability of Earth. However, the remote nature of deep-sea vents makes investigations challenging. Using the White Point (WP) shallow-sea hydrothermal vent field as a proxy, I employed molecular sequencing, fluorescent in situ hybridization (FISH) and ³⁵S-radiotracer assays ...

CAI, JIN-ZHI, 蔡金治

碩士 / 國立中正大學 / 外國語文研究所 / 80 / I. Introduction II. Early Period (1889-1903) A. Introduction B. Crossways (1889) 1. "The Lake Isle of Innisfree" 2. "The an Isle in the Water" 3. "The Sad Shepherd" 4. "The Indian to His Love" 1. "The Stolen Child" C. The Wanderings of Oisin (1889) D. The Ro...

Krogmeier, Benjamin

The West Antarctic Ice Sheet (WAIS) advanced to the outer shelf during the Last Glacial Maximum (LGM) before beginning a rapid retreat to the inner shelf. In the Whales Deep paleo-ice-stream trough, subsurface and geomorphologic evidence shows that grounding-line retreat was interrupted by at least five pauses in the area between the shelf edge and the middle shelf. During the pauses, an overlapping cluster of backstepped grounding zone wedges (GZWs) was deposited. Each GZW represents a groundin...

Slabbert, Ruhan

Thesis (MSc)--University of Stellenbosch, 2004. / ENGLISH ABSTRACT: The species Haliotis midae is the only commercially exploitable abalone species of the six found in the South African coastal waters. This species is under substantial pressure from both legal and illegal harvesters, to such an extent that it could be commercially extinct within four years. Efforts to alleviate the pressures on the natural populations of both illegal and legal harvesting are being made. The genetic managem...

Gitay, Asher

A study of 50 samples of Polychaeta mainly from a northern profile (0.5 - 550 m) and down to 800 m, reveals that the fauna is characterised by extremely small specimens and a great taxonomic divergence. Techniques of handling minute specimens are described, together with 21 new species, including three subspecies, six new genera and a new subgenus. The discovery of aberrant genera indicates a substantial endemism, the evolution of which is enabled by: (a) the narrow Straits of Tiran which separa...

Yi-Cheng Chang, 張亦成

碩士 / 國立臺灣海洋大學 / 生物科技研究所 / 100 / Anti-Dorsalizing Morphogenetic Protein (Admp) is a member of the TGF-β superfamily. In Xenopus, admp is expressed in the Spemann organizer and its protein product has BMP-like activity. When ventral BMP signals are depleted, admp expression increases, allowing the BMP gradient to be reestablished. In sea urchin embryos, BMP signals are required for the specification of the aboral (dorsal) tissue. I therefore aim for studying the roles of Admp during sea urchin dev...

Duthie, Tarryn-Lee

Word processed copy. / Includes bibliographical references (leaves 45-52) / Spatial variability in egg volume was investigated for anchovy, sardine and round herring in the southern Benguela in 1998, 2000 and 200 l. The relationship between sea surface temperature (SST) and egg volume was determined and the parental condition hypothesis was investigated through the relationships of adult size and condition with egg volume. General linear models for each species were used to determine the factors...

Burris, Zair P.

x, 97 p. : ill. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. / In all species of pycnogonids (sea spiders) males care exclusively for the offspring, making this group essential for studies on sex roles, sexual selection, and the evolution of parental investment. Unfortunately, little is known about pycnogonid mating patterns, larval development, or the costs associated with parental care. The mating habits o...

Austin, Heather L. (Heather Lara), 1984-

xv, 151 p. : ill. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. / The sea anemone Metridium senile occurs along a salinity gradient in the South Slough Estuary, Oregon, where it is subjected to frequent and sometimes large fluctuations in salinity. This study determined how hypo-osmotic stress contributes to the survival and distribution of this population. In the laboratory, chronic exposure ofM. senile to...

Li, Zhen

This study contributes to developing terrestrial and marine palynological indicators of winter or summer monsoon signals as well as oceanographic environments of the South China Sea (SCS). The high-resolution reconstructions of Holocene East Asian Monsoon (EAM) climate and oceanographic condition of the northern SCS provide insights into regional climate events in the western low-latitude Pacific Ocean and their impacts on local oceanography and ecology. Sediment trap samples from the southwes...

Harrison, Albert

Bibliography: p. 180-196. / The fundamental opposition of certain literary critics is reviewed. It is evident that much of the antagonism results from Kipling's allegedly tendentious presentation of imperialism, and from the dispute over forms of political dominance. The purpose of this study being to examine the nature and significance of imperialism in his work, several definitions of the term are given, and the areas in which he had particular interest are reviewed. A basis for a comparison w...

Lundmark, Mandus

In order to encounter the rising sea level, the county government of Stockholm has proposed three options; 1) not to do anything 2) raise the water level in Mälaren, 3) build barriers in the archipelago. In my theses I focus on option three where I investige what the consequences might be of building barriers in the archipelago. Moreover, I design one of the barriers in order to explore the possibilites of such an intervention. / Stockholm hotas av havsvattenhöjningen och för att bemöta probleme...

Nilsson, Gabriella

Meteorological measurements from the research station at Östergarnsholm in the Baltic Sea between 1995 and 2001 are used to evaluate the ERA-40 data base over the Baltic Sea. This includes comparisons of mean parameters and turbulent fluxes. The statistics concern all the data available when the measuring site was exposed to open sea conditions, and includes about 1500 hours of data. Seasonal data is compared as well. Regarding all the mean parameters compared, ERA-40 is partly in line with the ...

Mandelli, Michaela <1977>

Reproductive physiology has many applications for a successful management of fish population in aquaculture. In particular the stock management of endangered species might take advantage of the knowledge concerning the reproductive cycle in order to improve the protocols and restore the population for restock activities. The Adriatic sturgeon (Acipenser naccarrii) and the European eel (Anguilla anguilla) are two endemic species of the North Adriatic Sea and are both listed in the the IUCN Red L...

Sheng-Tong Chen, 陳勝通

碩士 / 國立臺灣海洋大學 / 機械與機電工程學系 / 94 / The purpose of this paper is to build a set of simulator for the surface dynamics of the sea combining adaptation law with random wave theory. We use the seven-link motion platform to simulate the dynamics of the roll、heave and pitch on the fixed point above the sea. Because the simulator for the surface dynamics of the sea that is highly complex nonlinear system, therefore the parameter of system is difficult to obtain. In this paper, we use Model Reference Adap...

Mueller, Bennit L.

By the end of 2016 surveillance and reconnaissance satellites will have been monitoring Arctic-wide sea ice conditions for decades. Situated at the boundary between atmosphere and ocean, Arctic sea ice retreat has been one of the most conspicuous indication of climate change, especially in the two most recent decades. The 2001 annual minimum extent of Arctic sea ice marks the last year above the 1981 -- 2012 long-term average extent. Ever since then only lower than average Arctic sea ice has b...

Xiao, Shengchun, Xiao, Honglang, Kobayashi, Osamu, Liu, Puxing

Radial growth characteristics of a high-elevation shrub species, sea buckthorn (Hippophae rhamnoides), were investigated at four sites in a river valley at altitudes ranging from 3,333 to 3,820 m a.s.l. close to the terminus of the July First Glacier in the western Qilian Mountains of northwestern China. Radial growth of the sea buckthorn was significantly and positively correlated with the mean monthly temperature in June of the current growing season. Based on the fact that fluctuations in the...

Möller, Niklas

This Master Thesis main purpose was to answer the question "Can you measure or calculate the velocity sound profile while performing a bathrymetric survey in an offshore environment like the North Sea, without any interaction nor modification of the existing equipment?".This, since today underwater surveys are a complex and expensive operation to perform where you either are mapping the sea floor or on a searching mission for a sunken wrecks. To achieve this successfully, one has to ensure that the ...

Nesbitt, Jenny E

The work presented in this dissertation focuses on biomimetic studies of two systems of biosilification: a subset of unicellular algae, known as diatoms, and sea sponges. Chapter I introduces the topics represented in subsequent chapters, including biomineralization, biosilica deposition in sea sponges, biosilica deposition in diatom cell walls, previous biomimetic work, and typical laboratory-based metal oxide formation. Work in Chapter II describes the development of a library of dendrimer-bas...

Paulse, Michele

Bibliography: pages 275-294. / The political economies of segregation and apartheid contributed to the production and reproduction of a mainly Coloured working-class enclave in Tramway Road and Ilford Street, Sea Point, during the 20th century. Against this background, this thesis discusses activities performed by residents of the enclave in their residential area, activities that reflected the changing political economies and through which the residents themselves produced and reproduced their ...

Nahirnick, Natasha K.

Eelgrass (Zostera marina) is a critical nearshore marine habitat for juvenile Pacific salmon (Oncorhynchus spp.) as they depart from their natal streams. Given the poor marine survival of Coho (O. kisutch) and Chinook (O. tshawytscha) salmon juveniles in recent decades, it is hypothesized that deteriorating eelgrass habitats could contribute to their low survival. The primary goal of this research was to investigate the possible long-term spatial-temporal trends in eelgrass habitat in the Salish...

Morgan, Raphaël

Doctorat en Sciences / info:eu-repo/semantics/nonPublished

Eriksson, Marcus

Freshwater is essential for a functional society and the human well-being. However, it should not be taken for granted. Freshwater aquifers in coastal are subject to current and future risk of becoming saltwater contaminated – reaching a tipping point. Freshwater security on islands is vulnerable. The aim of this empirical study is to identify the effects of a 2-meter sea level rise and the current risk of well salinization at the Baltic Sea island of Öland, Sweden. A Geographical Information Sy...

Mattsson, Josefin

No description available.

Colna, Kaitlyn E.

<p> The Intertropical Convergence Zone (ITCZ) is a feature that results from the ocean-atmosphere interactions in the tropics around the world. The ITCZ is characterized by surface wind convergence, tall storm clouds, and it forms a belt of high time-averaged precipitation around the globe. The ITCZ undergoes seasonal migrations between 5&deg;S and 15&deg;N roughly following the subsolar point on Earth with the seasons, with a mean annual position located slightly above the Equator, between 2&de...

Zhang, Yangfan

Assessing fish performance, whether for extrapolation to natural conditions, culture conditions or toxicology, has a long history of using swim performance, metabolic rates and performance in hypoxia. However, rarely are these metrics unified in a test. Hence, thesis’ objective was to test a respiratory assessment paradigm (RAP), which comprehensively evaluated aerobic and anaerobic metabolism by explicitly measuring aerobic capacity, recovery and performance in hypoxia. To provide high fish thr...

Marcotte, Michelle

Variability in length of lactation and maternal association allows otariids flexibility to buffer their young against changes in nutrition. It also increases the chance of their young surviving to sexual maturity, which is particularly important in a declining species such as Steller sea lions {Eumetopias jubatus). Timing of weaning is a critically important event in mammalian development that can affect subsequent aspects of an animal's adult life, and may hold the key to understanding the...

Huang, Shih-Yin Susie

Lipids are an invaluable dietary component for fish because they furnish the indispensable essential fatty acids (EFA) that are required for normal growth and development of the animal EFA generally refers to 18:3n-3, 18:2n-6 and their metabolic derivatives, 20:5n-3, 22:6n-3 and 20:4n-6. Marine and freshwater species have distinct EFA requirements largely due to differences in the lipid compositions of their naturally available diets as well as differences in their metabolism of lipids and fatty...

Sardella, Brian

The Salton Sea is a large inland lake in southeastern California with salinity currently near 44 g/l that is increasing at a rate of 0.3 g/l annually. Along with salinity, large fluctuations in temperature and dissolved oxygen levels combine to make a very challenging environment that may be responsible for dramatic losses to the Salton Sea's once robust fishery. The dominant species within the fishery is a Mozambique tilapia hybrid (Oreochromis mossambicus x O. urolepis hornorum), which is...

Spalding, David Joseph Reede

Feeding habits of fur seals (Callhorinus ursinus), sea lions (Eumetopias jubata) and harbour seals (Phoca vitulina) have been examined along the British Columbia coast. Collections were made out to 35 miles from shore. All pertinent published and unpublished data have been combined with the object of assessing the effect of pinniped predation upon commercially valuable fish stocks. A total of 126 harbour seal stomachs, 2,113 fur seal stomachs and 393 sea lion stomachs were available. Comparative...

Gilfillan, Edward Smith

Temperature, salinity, and other, undefined properties of sea water have been suggested as factors acting to limit the distribution of planktonic organisms through the stresses they impose. The aim of this study was to examine experimentally the effects of changes in these properties on the respiration of Euphausia pacifica Hansen. Both immediate and long term effects of changes in these properties were examined. Assessments of the immediate effects of changes in temperature and salinity on the...

Tshuma, Mengezi Chancellor

black owners by white colonialists. Even though whites made up less than 20% of the nation‟s population, they took more than 80% of the agriculturally productive land and drove the original owners to the unproductive reserves where they were cramped and could not practice agriculture at all. Various acts such as the Black Land Act of 1913, Development Trust Act of 1936 and the Native Laws Amendment Act of 1937 were introduced which further frustrated the displaced black population thereby plungi...

Okino, Kyoko

Kyoto University (京都大学) / 0048 / 新制・論文博士 / 博士(理学) / 乙第10014号 / 論理博第1348号 / 新制||理||1079(附属図書館) / UT51-99-D218 / (主査)教授 安藤 雅孝, 教授 尾池 和夫, 教授 中西 一郎 / 学位規則第4条第2項該当

Imafuku, Michio

Kyoto University (京都大学) / 0048 / 新制・課程博士 / 理学博士 / 甲第1695号 / 理博第384号 / 新制||理||221(附属図書館) / UT51-61-I168