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 21 for “"Humpback Whale"”.
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Assessment of early 20th Century climate model simulations of Antarctic Sea ice using historical commercial humpback whale catch data
The story of Southern Hemisphere humpback whales through time presents multiple narratives. This study integrated two of those narratives to better understand our climate over time - the ecological behaviour of this species as well as their exploitation in the last century. The changing of our …
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Assessment of a predictability index for humpback whales' supergroups occurrences in the Southern Benguela
… Since 2011, unprecedented aggregations of humpback whales (Megaptera novaeangliae) have been observed in the Southern Benguela. It has been proposed that positive chlorophyll anomalies and reduced outward transport serve as potential indices for predicting the formation of humpback whale …
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Humpback whales, rock lobsters and mathematics : exploration of assessment models incorporating stock-structure
… three concern the Southern Hemisphere (SH) humpback whale (Megaptera novaeangliae) and one the South African east coast rock lobster Palinurus delagoae. It also sets out the statistical background to the methodology employed in the assessments, including an outline of the Bayesian approach, …
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Fine-Scale Foraging Behavior of Humpback Whales Megaptera novaeangliae in the Near-Shore Waters of the Western Antarctic Peninsula
… to examine the fine-scale foraging behaviors of humpback whales (Megaptera novaeangliae) in the coastal waters of the Western Antarctic Peninsula during the austral autumn of 2009 and 2010. Discrete feeding events (i.e., lunges) were inferred from the biologging records of thirteen whales, …
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Using Siamese neural networks to identify individual animals
… outside of ecology and to measure the size of whales [Gray et al., 2019b] in ecology. In addition to classifying the object and proposing a bounding box, Mask RCNN also proposes a mask for each object. The “mask” is a selection of pixels that belong to the object of interest which are …
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Photo-identification of humpback whales (Megaptera novaeangliae) between Iceland, Norway and Guadeloupe
The migration of the humpback whale (Megaptera novaeangliae) is one of the longest known of any mammal on earth. They migrate seasonally between several low-latitude breeding grounds and several high-latitude feeding grounds. The geographical segregation of feeding grounds through …
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Linking Prey to Predator: Scale Dependence and Oceanographic Influence in Marine Food Webs
… of decisions made by an individual foraging whale. In the Gulf of Mexico, fish distributions at fine scales (both horizontal and vertical) were examined relative to hypoxic bottom waters to understand potential ecosystem effects. Forage fish distribution (sand lance, Ammodytes spp.) were …
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Low and Slow
… on the ocean’s surface. Using the 2019 Wish Whale performance as a point of departure, it analyzes three forms of surface encounter: the ocean’s visible threshold; the living or deceased bodies of marine mammals; and Ron Broglio’s theorization of surface phenomenology as a site of …
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Risk of Ship Strike and Noise Pollution to Cetaceans in the Bering Strait
… found the highest levels of risk to be among the humpback whale and North Pacific right whale populations in the Bering Strait region, although there remain high levels of uncertainty regarding both the rates of future ship traffic and the knowledge of the cetacean abundance and distribution in …
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An investigation on humpback whales' distribution in relation to Antarctic sea ice in the IDCR/SOWER dataset
Existing literature has identified humpback whales (Megaptera novaeangliae) as climate sentinels since their feeding ecology is inextricably linked to the oceanic features around Antarctica, and to the seasonal sea ice. The changing Antarctic cryosphere in response to climate change threatens not …
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Hydrodynamic effects of leading-edge tubercles on control surfaces and in flapping foil propulsion
… hydrofoils based on the pectoral flippers of the Humpback whale (novangilae megaptera). The first study uses a static foil, with application to conventional control surfaces--such as rudders or dive planes--found on marine vehicles. The second study uses a dynamic foil, with application to …
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Comparative analyses of aryl hydrocarbon receptor structure and function in marine mammals
… samples from living North Atlantic right whales to identify the cDNA sequence for AHR and other genes of physiological importance. Biopsy-derived RNA was found to be of higher quality than RNA extracted from stranded cetaceans, and proved a good source for identifying cDNA sequences for …
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An investigation of the roles of geomagnetic and acoustic cues in whale navigation and orientation
Many species of whales migrate annually between high-latitude feeding grounds and low-latitude breeding grounds. Yet, very little is known about how these animals navigate during these migrations. This thesis takes a first look at the roles of geomagnetic and acoustic cues in humpback whale …
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E pluribus unum: what individual whales can tell us about enigmatic species distribution and social organization
Large whales have historically been difficult to study and many aspects of their ecology remain unknown especially at the long -term population level. The ability to identify individual whales based on natural markings provides the opportunity to track individuals over time and space; this data may …
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Uma aborgagem biogeográfica dos cetáceos da costa brasileira
… dolphin (Stenella frontalis) and the killer whale (Orcinus orca) as well as whales (Bryde's, Balaenoptera edeni and dwarf minke whale B. acutorostrata). ln contrast, such species are lacking along the coastal waters of the northeastern coast, indicating the oligotrophic structure of these …
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The environmental factors determining temporal distributions of cetaceans in Mossel Bay, South Africa
… seasonal, annual). The study focused on three whale species: the southern right whale (Eubalaena australis), humpback whale (Megaptera novaeangliae) and Bryde's whale (Balaenoptera brydei); and two dolphin species: the Indo- Pacific bottlenose dolphin (Tursiops aduncus), and the Indian Ocean …
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An investigation of the roles of geomagnetic and acoustic cues in whale navigation and orientation
Many species of whales migrate annually between high-latitude feeding grounds and low-latitude breeding grounds. Yet, very little is known about how these animals navigate during these migrations. This thesis takes a first look at the roles of geomagnetic and acoustic cues in humpback whale …
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Microanatomic structure of cetacean skin in the urogenital region
… harbor porpoise (Phocoena phocoena), pygmy sperm whale (Kogia breviceps), short and long finned pilot whales (Globicephala macrorhynchus and malaena respectively), beluga whale (Delphinapterus leucas), humpback whale (Megaptera novaeangliae), and fin whale (Balaenoptera physalus). Measurements …
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Behavioral choices of male humpback whales (Megaptera novaeangliae) on the Hawaiʻian wintering grounds
Humpback whales (Megaptera novaeangliae) are a migratory species, feeding in high latitude, cooler waters during the summer, and then traveling to low latitude, warmer waters during the winter months to calve and presumably, though it has never been documented, to mate. The North Pacific has three …
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Acoustic and visual tracking reveals distribution, song variability and social roles of humpback whales in Hawaiian waters
… visual methods were used to track and observe humpback whales off Hawai'i. Chapter 3 found 62 singing whales were located acoustically in water depths from 10 to 305 fathoms. This indicates that singers are not confined within the 100 fathom contour, although near shore waters had a higher …
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