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 13 of 13 for “"Orcinus orca"”.
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Echolocation in wild killer whales (Orcinus orca)
… echolocation sounds in pods of killer whales (Orcinus orca) off the coasts of British Columbia and Alaska. I examine the relationships between echolocation and water clarity, ambient noise, and behavioural activity. I compare echolocation by two populations with different feeding habits and …
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Vocalizing Behavior in Killer Whales (Orcinus orca) – an Evolutionary Account
… account of language, with killer whale (Orcinus orca) vocalizations and what we call the orca vocalization and orca symbolic vocalization systems. We postulate hypothetical orca counterparts of the elements of language described in Chomsky’s account and trace out the relevant …
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Maintaining contact : design and use of acoustic signals in killer whales, Orcinus orca
This thesis presents data on the structure and use of acoustic signals produced by free-ranging resident killer whales. The analysis focuses on signal features that might be useful for animals to maintain contact and coordinate activities with preferred associates, including: distinctiveness by …
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Orchestration : the movement and vocal behavior of free-ranging Norwegian killer whales (Orcinus orca)
Studying the social and cultural transmission of behavior among animals helps to identify patterns of interaction and information content flowing between individuals. Killer whales are likely to acquire traits culturally based on their population-specific feeding behaviors and group-distinctive …
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Orchestration : the movement and vocal behavior of free-ranging Norwegian killer whales (Orcinus orca)
Studying the social and cultural transmission of behavior among animals helps to identify patterns of interaction and information content flowing between individuals. Killer whales are likely to acquire traits culturally based on their population-specific feeding behaviors and group-distinctive …
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Dialect Use Within a Socially Fluid Group of Southern Resident Killer Whales, <i>Orcinus orca</i>
<p>Resident killer whales, <em>Orcinus orca</em>, of the Northeastern Pacific form stable kinship-based matrifocal associations and communicate with group-specific repertoires of discrete calls (dialects) that reflect these associations. The gradual fission of matrilines is usually consistent with …
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Variation in Social Behavior Throughout the Estrous Cycle of a Captive Killer Whale <i>Orcinus orca</i>
<p>The study of cetaceans in captivity provides information on behavior, acoustics, reproduction and physiology that is often difficult to obtain with free-ranging populations. The present study examined the influence of the estrous cycle of a captive female killer whale on the rate, duration, …
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Conservation Awareness and Public Knowledge of the Endangered Southern Resident Killer Whales (Orcinus orca) on Vancouver Island, Canada
… Whales (SRKWs) are an endangered population of Orcinus orca, with only 74 individuals remaining. This study examined public knowledge, awareness, and conservation actions regarding SRKWs among 483 residents of Vancouver Island, Canada. Guided by Value‑Belief‑Norm and Place Attachment frameworks, …
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Biology & ecology of a killer whale (Orcinus orca) community that interacts with pelagic trawlers in the Northeast Atlantic
Observations of killer whales (Orcinus orca) aggregating around pelagic fishing vessels operating offshore during the autumn/winter Northeast Atlantic mackerel (Scomber scrombrus) fishery, have been documented in the literature since the 1970s. However, baseline information on the biology and …
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Isolation and Genomic Analysis of the Cetacean Y-chromosome
… is reported for the killer whale (Orcinus orca). Microdissected Y-chromosomes from the killer whale and bottlenose dolphin (Tursiops truncatus) were screened for sequences containing microsatellite motifs. 15 and 10 male-specific microsatellites were identified from the killer whale …
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Uma aborgagem biogeográfica dos cetáceos da costa brasileira
… (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 waters. …
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Characterizing maternal and alloparental care in wild killer whales
… data. The southern resident killer whales (Orcinus orca ater) are a critically endangered, closed population of wild, free ranging cetaceans that have been closely studied by the Center for Whale Research for almost 50 years, with individual identification and maternal relatedness known for …
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The spatial ecology and behaviour of the broadnose sevengill shark (Notorynchus cepedianus) in South Africa
… predations on N. cepedianus by killer whales (Orcinus orca) occurred in False Bay, providing a unique opportunity to investigate the impacts of a novel apex predator on the behaviour of N. cepedianus. Overall, the results showed that N. cepedianus has a broad distribution in temperate coastal …