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 72 for “"marine mammals"”.
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Tidal Energy, Underwater Noise and Marine Mammals
… to increase in the near future, particularly in marine renewables. However, the environmental and ecological impact of many of these new developments in the marine environment is largely unknown.<br/>My thesis has focused on one unknown area of interaction; the potential effect of tidal-stream …
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Swimming sentinels : climate clues from stranded marine mammals
… recently puzzled by a spate of dead and dying marine mammals. These events are so complicated- influenced by disease, biotoxins, ecosystem changes, and human interaction-that their cause can appear impossible to untangle. Yet a growing body of evidence strongly suggests that climate change has …
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Approaches to understanding the cumulative effects of stressors on marine mammals.
… the cumulative effects of stressors on marine mammals and suggested the use of baleen whale earplugs to evaluate both stress and stressors. The objective of this dissertation is to investigate historic and current organic and inorganic contaminants within the marine ecosystem to better …
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Comparative analyses of aryl hydrocarbon receptor structure and function in marine mammals
Marine mammals possess high body burdens of persistent organic pollutants, including PCBs and dioxin-like compounds (DLC). Chronic environmental or dietary exposure to these chemicals can disrupt the function of reproductive and immune systems, as well as cause developmental defects in laboratory …
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Adapting Small Unmanned Aerial Systems for Behavioral Research with Coastal Marine Mammals
<p>Marine mammals inhabit aquatic worlds where their subsurface behavior, cryptic surface profiles, and movements make them difficult to study. New tools are needed to study coastal marine mammals in a world increasing impacted by climate change related shifts in weather and animal distribution …
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Comparative analyses of aryl hydrocarbon receptor structure, function, and evolution in marine mammals
Marine mammals possess high body burdens of persistent organic pollutants, including PCBs and dioxin-like compounds (DLC). Chronic environmental or dietary exposure to these chemicals can disrupt the function of reproductive and immune systems, as well as cause developmental defects in laboratory …
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From physiology to pixels: Resource allocation tradeoffs and noninvasive technologies for studying marine mammals
… shapes survival and reproductive success across mammals. Using the exceptional >60-year Weddell seal (Leptonychotes weddellii) demographic study in Erebus Bay, Antarctica, this dissertation links individual physiological traits to lifetime reproductive output in a long-lived free-living mammal. I …
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Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations
… energy can bioaccumulate and harm individuals. Marine mammals are particularly vulnerable because of their large energy requirements, and transfer of energy and toxicants from mothers to their young during gestation and lactation. Dynamic energy budget (DEB) models for energy assimilation and …
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Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations
… energy can bioaccumulate and harm individuals. Marine mammals are particularly vulnerable because of their large energy requirements, and transfer of energy and toxicants from mothers to their young during gestation and lactation. Dynamic energy budget (DEB) models for energy assimilation and …
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Assessment of dietary patterns and prey consumption of marine mammals: Grey seals (Halichoerus grypus) in the Baltic Sea
… diet since the early 1970s. Dietary studies of marine mammals generally suffer from a number of possible biases, both concerning the methodology and how the samples are collected. This thesis applies different methods to increase the accuracy and quantifies the uncertainties of the dietary …
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Increased Shipping Activity and Marine Mammals in Baffin Bay and Davis Strait: Developing a Low-Impact Shipping Corridor.
As the Canadian Arctic warms at a rate far surpassing the global average, the changing sea ice regime invites increased development and shipping activity. This increased activity introduces greater anthropogenic pressures on cetaceans, resulting in increased risk of strikes, behavioural …
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Integrated coastal and ocean management of areas hosting marine mammals a case study in the strait of Gibraltar
… of Gibraltar is a cross-border coastal and marine area in which overlapping intense maritime traffic and highly protected species of cetaceans could generate conservational or economic conflict. The current publication applies an integrated management approach in order to improve knowledge …
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Interactive Visualization to Reveal Activity Patterns of Marine Mammals and Boat Traffic in the St. Lawrence Estuary in Quebec, Canada
… and tourism have posed cumulative threats to the marine mammals in the St. Lawrence Estuary. In order to understand and quantify the exposure of marine mammals to visiting traffic, an agent-based model was built to simulate the behaviour of whales and boats in a portion of the St. Lawrence …
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Marine Mammals Before Extirpation: Using Archaeology To Understand Native American Use Of Sea Otters And Whales in Oregon Prior to European Contact
… residing in a rich environment, home to diverse marine mammals. Euro-Americans over-exploited these marine mammals and drove some species to near extinction. Some marine mammal populations rebounded while others, such as the locally extinct Oregon sea otter, never recovered. Threats from hunting …
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Thyroid hormones and their receptor gene expression as biomarkers of endocrine disruption in harbour seals (Phoca vitulina)
… health of both humans and wildlife. Predatory marine mammals, such as harbour seals (Phoca vitulina), are at particularly risk for the accumulation of high POP concentrations and resultant increased risk of toxic effects. EIevated levels of certain POPs have been implicated in the disruption of …
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The Management and Stewardship of A Cetacean Collection
<p>Cetacean, by definition, is a marine mammal of the order Cetacea; a whale, dolphin or porpoise. In light of their social intellect and friendly appearance, cetaceans are used in institutions such as zoos and aquariums as a source of education and entertainment for the public. Before the Marine …
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Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the Norwestern Atlantic
… (MBPs) are a distinctive class of marine organic compounds. They are naturally produced, they have a unique carbon structure, they are highly halogenated, and they bioaccumulate in upper trophic levels. MBPs share many characteristics with persistent organic pollutants (POPs), and …
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Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the northwestern Atlantic
… (MBPs) are a distinctive class of marine organic compounds. They are naturally produced, they have a unique carbon structure, they are highly halogenated, and they bioaccumulate in upper trophic levels. MBPs share many characteristics with persistent organic pollutants (POPs), and …
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