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 99 for “"Sharks"”.
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Swimming behavior and energetics of sharks
… and tailbeat frequency from free-ranging blue sharks (Prionace glauca) in northwestern Atlantic slope waters. Records obtained from five sharks show a consistent pattern of vertical migration between the surface and depths as great as 450 meters, with the deepest dives occurring during the …
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Dentitions of lamniform sharks: Homology, phylogeny, and paleontology.
Dentitions of lamniform sharks: Homology, phylogeny, and paleontology.
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Towards On-Device Detection of Sharks with Drones
… projects across the globe using drones to detect sharks, including several high profile projects around alerting beach authorities to keep people safe. However, so far many of these attempts have used cloud-based machine learning solutions for the detection component, which complicates setup and …
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Morphology and evolution of caudal fin in lamniform sharks
Sharks have a distinct asymmetrical caudal fin referred to as heterocercal tail that is a key characteristic of the group and has diversified within sharks in ways that are correlated with lifestyle. However, practically no study examining the evolutionary trend and history of the caudal fin …
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State Estimation for Tracking of Tagged Sharks with an AUV
… the current method used for tracking fish and sharks over long distances. Final experiments involved the catching, releasing, and an autonomous AUV tracking of a 1 meter leopard shark (<em>Triakis semifasciata</em>) in SeaPlane Lagoon, Los Angeles, California.</p>
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Sexual segregation and abundance trend of whale sharks in southern Mozambique
Coastal aggregations of endangered whale sharks (Rhincodon typus) consist mainly of juveniles, and most have a strong male bias. Generalised additive models were constructed on a 15-year dataset (2005–2019), from Praia do Tofo, Mozambique, to investigate sexual segregation in relation to …
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Heavy Metal Distribution Across Three Georgia Estuaries Using Coastal Sharks As Sentinel Species
<p>Estuaries are transitional environments that play key roles in coastal ecosystem functioning by providing essential habitats to ecologically important plant and animal species. Estuaries are exposed to a number of anthropogenic impacts, including heavy metal contamination from human activities. …
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Integrated approaches for monitoring sharks: Leveraging machine learning, big data, and molecular biology
Sharks are ecologically important predators facing severe global declines, yet conservation and management are hindered by data deficiencies in taxonomy, distribution, and abundance. In this dissertation, I develop and integrate complementary technological approaches: machine learning, big data …
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Shark Sim: A Procedural Method of Animating Leopard Sharks Based on Raw Location Data
<p>Fish such as the Leopard Shark (Triakis semifasciata) can be tagged on their fin, released back into the wild, and their location tracked though technologies such as autonomous robots. Timestamped location data about their target is stored. We present a way to procedurally generate an animated …
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Evaluating the Conservation and Ecological Roles of Large Marine Protected Areas for Threatened Sharks
Sharks are among the most threatened groups of vertebrates on the planet, in large part due to historical and ongoing overfishing, both via targeted exploitation as well as bycatch. In recent years, shark conservation has gained increased international attention, particularly with respect to …
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Effect of fear and representations of great white sharks on great white shark conservation behavior
Great white sharks are listed as a vulnerable species under the International Union for Conservation of Nature (IUCN) red list. This study uses the theory of planned behavior (TPB) to test how different factors such as attitudes, subjective norms, perceived behavioral control along with …
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New insights into the summer distribution of basking sharks (Cetorhinus maximus) in the northeast Atlantic
Basking sharks, Cetorhinus maximus, have undergone widespread historic exploitation in the northeast Atlantic and are of conservation concern. A greater knowledge on their spatial and temporal habitat use in response to environmental conditions is required to better inform subsequent monitoring and …
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Demographics of a seasonal aggregation of white sharks at Seal Island, False Bay, South Africa
White sharks (Carcharodon carcharias) are widely distributed, ecologically important marine apex predators that are considered to be vulnerable to extinction. Given their crucial roles in structuring marine ecosystems, their populations need to be effectively monitored. Photo-identification …
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Age, movements, and feeding ecology of northwest Atlantic white sharks estimated from ecogeochemical profiles in vertebrae
White sharks (Carcharodon carcharias) are highly migratory, ecologically important, vulnerable, and understudied marine predators. Ecogeochemistry, which takes advantage of natural variations in chemical signatures recorded in body tissues, can help determine lifetime movement, age, and ontogenetic …
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Factors influencing the nursery dynamics of juvenile bull sharks in two estuaries along the Texas coast
… by several shark species, including bull sharks (Carcharhinus leucas). Bull sharks utilize estuaries adjoining the Gulf of Mexico as nursery habitat, and are the most abundant shark species found along the Texas coast. Little is known about their nursery dynamics in this region, especially …
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Age, movements, and feeding ecology of northwest Atlantic white sharks estimated from ecogeochemical profiles in vertebrae
White sharks (Carcharodon carcharias) are highly migratory, ecologically important, vulnerable, and understudied marine predators. Ecogeochemistry, which takes advantage of natural variations in chemical signatures recorded in body tissues, can help determine lifetime movement, age, and ontogenetic …
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Prey Selection by Young Lemon Sharks (Negaprion brevirostris) at Chandeleur Island Nursery Habitats with a Comparison to Three Other Co-Occurring Shark Species
… (Louisiana) contain nursery habitats for lemon sharks that provide abundant prey and protection from predation. Other local shark species (Atlantic sharpnose, bull, and blacktip sharks) co-occur with lemon sharks in the same region, including the nearby Biloxi Marshes. To better assess how lemon …
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Effects of Environmental Enrichment on Learning a Discrimination Task by Captive White-spotted Bamboo Sharks (Chiloscyllium plagiosum)
… experimentally that several species of sharks are capable of learning by association but no studies have investigated the effects of environmental enrichment on sharks’ learning abilities. The main objective of this study was to test the hypothesis that environmental enrichment would …
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Sometimes Sharks Appear in Lakes Too: Tridirectional Insights on Leader Humility and Its Influence on Employee Behavior
Most research on leader humility to date has focused on positive outcomes, portraying humble behaviors as unequivocally beneficial to followers and leaders. However, scant research has examined the detrimental aspects of leader humility. This thesis challenges the consensus that leader humility is …
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Sometimes Sharks Appear in Lakes Too: Tridirectional Insights on Leader Humility and Its Influence on Employee Behavior
Most research on leader humility to date has focused on positive outcomes, portraying humble behaviors as unequivocally beneficial to followers and leaders. However, scant research has examined the detrimental aspects of leader humility. This thesis challenges the consensus that leader humility is …
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