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 145 for “"Shark"”.
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Shark Heart
Shark Heart is a manuscript of poems that maneuver between fearlessness and tenderness at the drop of a dime. In the same way that many sharks need to survive by constantly swimming in order to extract oxygen from the water streaming between their gills, the heart muscle needs to constantly pump …
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Improveing F-beta Score in Classifying Shark Data into Shark Behaviors
… the average F-b score computed in classifying shark data into shark behaviors, namely; Resting, Swimming, Feeding, and Non-Directed Motion (NDM). Synthetic Minority Oversampling Technique (SMOTE) and Adaptive Synthetic Sampling (ADASYN) are utilized to balance the data, from which pre-processed …
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Conservation education in shark ecotourism
Sharks, as top predators, are vital a healthy marine ecosystem. Sharks regulate species abundance, distribution, and diversity, which in turn can impact the health of marine habitats. The biggest issue relating to the endangered status of many shark species is the unsustainable international trade …
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Human safety and shark conservation: an analysis of surfer risk perceptions and attitudes towards shark management
South Africa has a history of human conflict with sharks and shark safety management. Management of this conflict differs throughout the country, with Cape Town opting for a non-lethal approach in the form of the Shark Spotters programme, and Kwa-Zulu Natal (KZN) opting for a lethal approach using …
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Multiple species of Phoreiobothrium from the blacktip shark,
During a survey of the adult tapeworm fauna of sharks from the Gulf of Mexico, the blacktip shark, Carcharhinus limbatus (Müller and Henle, 1839), was found to host cestodes in the genus Phoreiobothrium. Carcharhinus limbatus inhabits the world's tropical and warm temperate waters. As yet, 34 …
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Preying on the predator : the shark fin controversy
The consumption of shark fin soup dates back to the Ming Dynasty in China, when it was served to emperors. Today, the cultural delicacy represents wealth, status, and power. Over the past 30 years, with the rising middle class in China, the demand for shark fins has surged. To address the …
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Experimental Investigations into Shark Skin Inspired Active Flow Control Mechanisms
… actively actuated flaps inspired by bristlingshark scales was studied experimentally using digital particle image velocimetry (DPIV).The flaps in this study had a rectangular shape and were designed with a protrusion heightin the bottom 10% of the boundary layer height, which is similar to …
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Characterization of the Whale Shark (Rhincodon Typus) Melanocortin-2 Receptor
… of select cartilaginous fish, the elephant shark (<em>Callorhinchus milii</em>) and the red stingray (<em>Dasyatis akajei</em>), revealed divergent traits in a less obligatory relationship on MRAP1 and its ability to be activated by ACTH or the MSH-sized peptides. However, observed traits …
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Assessing conservation measures for five Southern African endemic shark species
… 190 species recorded, including 111 species of sharks. Many of these species are endemic to southern Africa (defined as the coastlines of Namibia, South Africa and Mozambique) but are poorly studied, despite their classifications of concern according to the International Union for the …
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Shark nets in KwaZulu-Natal : an evaluation of catches and alternatives
Protective gillnets (shark nets) have been successful in reducing the frequency of shark attacks on the coast of KwaZulu-Natal (KZN), South Africa. This is achieved primarily through a reduction in numbers of large sharks. The nets also take a by-catch of dolphins, sea turtles, batoids and …
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Influence of the Estimator Selection in Scalloped Hammerhead Shark Stock Assessment
… Our study assessed the scalloped hammerhead shark population on the western North Atlantic Ocean using Bayesian methods. This approach allowed incorporate diverse types of errors in the surplus production model and compare the influences of different statistical estimators on the values of …
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Some studies of the chemistry and technology of soupfin shark liver oil
… production, refining and storage of soupfin shark liver oil.
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Aquaporin 3 Water Channel Protein Gene Expression in Squalis Acanthias Dogfish Shark
… epithelial cells of Squalus acanthias dogfish shark kidney, gills, rectal gland, esophagus, stomach, eye and brain. The full-length Squalus acanthias sequence has 73.8% amino acid identity to human AQP3. Quantitative PCR experiments suggest that constitutive AQP3 expression in the esophagus and …
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Movement ecology of the bronze whaler shark (carcharhinus brachyurus) in southern Africa
… are functionally important for many species of shark including large wide-ranging species that occupy elevated trophic positions. Ecological or anthropogenic perturbations that alter the abundance, distribution or movements of large sharks can thus have destabilising ecosystem impacts along …
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