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 7 of 7 for “"diving behaviour"”.
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Comparative foraging ecology of macaroni and rockhopper penguins at the Prince Edward Islands
… expanded our knowledge about their at-sea behaviour, there is still much to be learned. Given the rapid ongoing ecosystem changes in the Southern Ocean, it is vital to better understand, firstly, how penguins respond to environmental variability, and secondly, how such changes alter …
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The behavioural physiology of diving animals, in particular tufted ducks (Aythya fuligula), and the implications for models of optimal diving
… data were combined with power cost estimates of diving to show that the optimal breathing model quantitatively predicted surface duration and the oxygen metabolised during foraging for the mean of all subject ducks but not for individual birds. Respirometry data also showed that both the oxygen …
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The Sea is the Limit: Foraging Ecology of Breeding Antarctic Procellariiformes
… thesis I examine the breeding-season foraging behaviour of several of the Procellariiformes, a wide-ranging, long-lived group of seabirds, many of which have experienced steep population declines since the mid-20th century. Advances in biologging technologies over the last four decades have …
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How seabirds respond to a changing oceanic environment: a biologging approach
… with human activities. However, finer scale behavioural data are required to understand the functional response of seabirds to different stressors. Biologging devices are continuously improving and miniaturising, being applied to collect fine-scale behavioural information for smaller species …
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The influence the oceanographic variability has on the top predators of the sub-Antarctic domain
… oceanographic (hours to days, 1-10 km) and behavioural (<10 sec, ~1 m) observations in the relatively inaccessible Southern Ocean has led to poor quantification of marine mammal foraging behaviour and the physical upper ocean processes that may influence them. In situ temperature and depth …
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Understanding and mitigating seabird bycatch in the South African pelagic longline fishery
… likely caused by differences in foraging behaviour and foraging dominance hierarchies. In Chapters 4 and 5 the foraging ecology of the most commonly recorded bycatch species off South Africa, the white-chinned petrel (Procellaria aequinoctialis), is investigated. An understanding of the …
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A scientific basis for a comprehensive approach to managing sea turtle by-catch: the Queensland east coast as a case study
… spatial stratification; (ii) To examine the behavioural responses of sea turtles to trawl capture in order to investigate the potential for post-trawl mortality; (iii) To investigate the factors that influence the distribution pattern of sea turtles, and from this analysis, predict the …