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 whales"”.
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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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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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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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Songs and courtship behavior of male humpback whales (megaptera novaeangliae) in the North Atlantic
During the breeding season, male humpback whales sing long, complex songs. The function of singing is unknown. As a display, however, it may be expected to convey something of the status or quality of the individual. Here I present a hypothesis for how singing might allow a listener to assess the …
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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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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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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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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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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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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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Temporal and spatial distributions of baleen whales in central New Zealand, based on passive acoustic monitoring
… threats. Worldwide, the distributions of baleen whales have proven difficult to study due to logistical constraints imposed by their offshore distributions and limited surface time. However, many baleen whales reliably produce stereotyped sound, and are therefore suitable to study acoustically. …
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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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Foraging ecology and population structuring of baleen whales in the western South Atlantic and eastern South Pacific
Baleen whales are highly mobile marine predators that are still recovering from unsustainable exploitation between the 18th and 20th centuries. There remain considerable gaps in our understanding of the migration, foraging localities, prey choice and population connectivity of whales in the …
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The environmental factors determining temporal distributions of cetaceans in Mossel Bay, South Africa
… 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 humpback dolphin (Sousa plumbea). Generalized additive models …
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Operator compliance and attitudinal compliance to aspects of Australian whale watch management conditions
… 1) observing whale watch operations that target humpback whales (Megaptera novaeangliae) in Queensland and New South Wales' waters and 2) conducting a questionnaire survey of whale watch operators’ attitudes towards compliance. Movements of whale watch vessels in relation to focal humpback whale …
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Using Neural Networks to identify Individual Animals from Photographs
… match. The model is tested on two case studies, humpback whales (HBWs) and western leopard toads (WLTs). The HBW dataset consists of images originally collected by various institutions across the globe and uploaded to the Happywhale platform which encourages scientists to identify individual …
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