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Dissertations / Theses on the topic 'Penguins'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 June 2025

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1

Liljesthröm, Marcela. "Avian predation at a Southern Rockhopper Penguin Colony on Staten Island, Argentina /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/liljesthromm/marcelaliljesthrom.pdf.

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2

Smith, Diane Lauren. "Penguin parenting : assortative mating, nest attendance and sex-specific chick provisioning in the African Penguin (Spheniscus demersus)." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/d1019993.

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Animal behaviour is especially sensitive to environmental variability and prey availability during the breeding season, and this is particularly true for non-volant, central place foragers such as the endangered African Penguin (Spheniscus demersus). Individual sex and morphology, as well as the level of assortment within mated pairs can influence both the behaviour and the reproductive success of species exhibiting biparental care. This study made use of a large biometric database and nest attendance video footage to determine the influence of intrinsic (assortative mating, brood size and chi

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3

Mattern, Thomas, and n/a. "Marine ecology of offshore and inshore foraging penguins : the Snares penguin Eudyptes robustus and Yellow-eyed penguin Megadyptes antipodes." University of Otago. Department of Zoology, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070502.150734.

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Seabirds have become adapted for foraging in an oceanic environment that can be highly dynamic. Oceanographic processes determine the spatial distribution of seabird prey, while seasonality often has a temporal influence on prey availability. In penguins, these factors are reflected in the different species� foraging strategies. Penguins can broadly be categorized as inshore foragers that live in subtropical to temperate regions and profit from a stable food supply throughout the year close to their breeding sites, and offshore foragers that breed in a pelagic environment at higher latitudes w

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4

Wilson, Rory Paul. "Breeding Jackass Penguins as pelagic predators." Doctoral thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/17653.

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Bibliography: pages 187-191.<br>The foraging of breeding Jackass Penguins Spheniscus demersus was studied in and around southwestern Cape Province, Saldanha Bay (33⁰ S, 18⁰ E), South Africa. Penguins are difficult to observe at sea. Hence, I devised a number of new techniques for studying the foraging behaviour of Jackass Penguins at sea. I built electronic and autoradiographic remote-sensing devices to measure swimming speed, distance travelled and time spent at each depth by foraging Jackass Penguins. Penguin swimming speed was reduced in proportion to the cross-sectional area of the devices

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5

Yoda, Ken. "Behavioural decisions of provisioning Adélie penguins." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/149126.

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6

Moon, Katherine Louise. "Do terrestrial ectoparasites disperse with penguins?" Phd thesis, Canberra, ACT : The Australian National University, 2017. http://hdl.handle.net/1885/144227.

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Dispersal plays a critical role in evolution. Rare long-distance movements can lead to allopatric speciation, whereas frequent movements can facilitate gene flow among disjunct populations and prevent divergence. Dispersal between populations of a species may be difficult to observe directly, and is often inferred from indirect measures such as species occurrence data. Increasingly, however, high resolution genomic data are being used to clarify dispersal and gene flow, in many cases contradicting past assumptions. Islands are excellent model regions for investigating dispersal as they offer r

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7

Booth, Jenny Marie. "Trophic ecology of breeding northern rockhopper penguins, Eudyptes Moseleyi, at Tristan da Cunha, South Atlantic Ocean." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005476.

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Northern Rockhopper penguin populations, Eudyptes moseleyi, are declining globally, and at Tristan da Cunha have undergone severe declines (> 90% in the last 130 years), the cause(s)of which are unknown. There is a paucity of data on this species in the South Atlantic Ocean, therefore their trophic ecology at Tristan da Cunha was studied, specifically focusing on diet, using stomach content analysis and stable isotope analysis (SIA), in conjunction with an analysis of diving behaviour, assessed using temperature-depth recorders. In order to evaluate the influence of gender on foraging, a morph

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8

Ralph, Mark Shaun. "Aspects of the breeding biology of the African penguin on Bird Island, Algoa Bay." Thesis, Nelson Mandela Metropolitan University, 2008. http://hdl.handle.net/10948/840.

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It is important to the survival of the Africa Penguin (Spheniscus demersus) population that breeding at the nest site is successful and that large numbers of chicks are fledged into the breeding population. Nest distribution on Bird Island is not random and locality preferences for breeding exist. Although it seems that sufficient area exists on Bird Island for penguin nests, it can hardly be considered as suitable to optimise breeding. During prolonged heat conditions, breeders relocated to nest sites that were sheltered. Nests that were below ground in burrows was the only habitat that did n

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9

Black, Caitlin Emily. "Variation in the phenology of Pygoscelis penguins." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:00c306b4-f7c4-4f11-8749-1e3ae118746b.

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Variation in phenology is linked to the timing of environmental variables and influences survival at both the individual and colony level. Therefore, understanding a species' annual cycle is vital to its ecology and conservation. By reviewing literature on Pygoscelis penguin phenology in Chapter 1, I identify major gaps, both spatially and temporally, in our knowledge of the timing of events in the three species (Adeélie, Pygoscelis adeliae; chinstrap, and Pygoscelis antarctica; gentoo, Pygoscelis papua): particularly, 1) during the guard phase, 2) their behaviour in winter, 3) the phen

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10

Ando, Tatsuro, and n/a. "New Zealand fossil penguins : origin, pattern, and process." University of Otago. Department of Geology, 2007. http://adt.otago.ac.nz./public/adt-NZDU20080204.140701.

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Penguins are middle- to large-sized sea birds and are widely distributed in the Southern Hemisphere. They have completely lost the capability for the aerial flight, but are highly efficient wing-propelled swimmers and divers. They have a long fossil record over 60 million years, and their origin could possibly extend back to the late Cretaceous. This study aims to elaborate the course of penguin evolution and driving force of changes based on fossil records of penguins. Numerous fossil penguin specimens have been collected and studied from New Zealand, Antarctica, South America, Australia, and

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11

Ninnes, Calum Edward. "Behavioural Endocrinology of Breeding Adelie Penguins (Pygoscelis adeliae)." The University of Waikato, 2008. http://hdl.handle.net/10289/2473.

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Measuring hormonal changes is vital for understanding how the social and physical environment influences behaviour, reproduction and survival. Various methods of hormone measurement exist, potentially explaining variation in results across studies; methods should be cross validated to ensure they correlate. I directly compare faecal and plasma hormone measurements (Chapter 2), and use the most suitable endocrine measure to test the Darling hypothesis (Chapter 3) - that breeding is hastened and synchronized in larger colonies due to increased social stimulation (mediated by the endocrine system

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12

Sidhu, Leesa A. Physical Environmental &amp Mathematical Sciences Australian Defence Force Academy UNSW. "Analysis of recovery-recapture data for little penguins." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Physical, Environmental and Mathematical Sciences, 2007. http://handle.unsw.edu.au/1959.4/38738.

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This thesis analyses yearly mark-recapture-recovery information collected over a 36- year period, from 1968 to 2003, for 23 686 flipper-banded Little Penguins Eudyptula minor of Phillip Island, in south-eastern Australia. Such a long-term data set is extremely rare for any species. Few studies of any animal have been able to model age dependence for the survival, recapture and recovery probabilities simultaneously. I successfully apply such a modelling scheme and obtain biologically realistic age structures for the parameters. I also provide illustrations of erroneous results that may arise wh

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13

Sutton, Grace. "Fine-scale foraging movements and energetics in penguins." Thesis, La Rochelle, 2021. http://www.theses.fr/2021LAROS031.

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Quantifier les interactions prédateur-proie peut être difficile sur le plan logistique, en particulier dans les environnements marins. Cependant, il est essentiel de prédire comment les individus réagissent aux changements dans la disponibilité des proies, un facteur important dans l'évaluation de l'impact du changement climatique. Dans la présente étude, une combinaison de caméras, d'accéléromètres, d'enregistreurs de plongée et de GPS a été utilisée pour déterminer les facteurs influençant l'effort et l'efficacité de la recherche alimentaire chez les manchots. Celles-ci ont été étudiées chez

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14

Brown, Christopher Raymond. "Ecological energetics of Eudyptes penguins at Marion Island." Doctoral thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/7594.

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Includes bibliographies.<br>Macaroni Penguins (Eudyptes chrysolophus) and Rockhopper Penguins (E. chrysocome) breed sympatrically at Marion Island in the sub-Antarctic, where they account for a substantial proportion of the avian biomass breeding at the island. This thesis documents the energy requirements of the two species during their respective breeding and moulting cycles at the island. Resting metabolic rates, calculated from lowest, stable rates of oxygen consumption over 24 h, averaged 25 % greater than basal metabolic rates predicted from allometric equations. Body temperatures of the

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15

Broni, Stephen Christopher. "Penguins and purse-seiners : competition or co-existence?" Master's thesis, University of Cape Town, 1985. http://hdl.handle.net/11427/7611.

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Bibliography: leaves 110-124.<br>The relationships between the pelagic purse-seine fishery and Jackass penguins (Spheniscus demersus) were investigated at Saldanha Bay, on the south-western coast of South Africa, between December 1982 and August 1983. The distribution at sea and the foraging behaviour of Jackass Penguins were examined by running standard transects with a sail boat in waters close to the birds' breeding islands. The use of a sail boat permitted close observation of foraging penguins with minimal disturbance. Penguin numbers at sea were lowest in December, when birds were confin

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16

Boessenkool, Sanne, and n/a. "Spatial and temporal genetic structuring in yellow-eyed penguins." University of Otago. Department of Zoology, 2009. http://adt.otago.ac.nz./public/adt-NZDU20090812.163749.

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Improving our understanding of the forces driving population decline and the processes that affect the dynamics of threatened populations is central to the success of conservation management. The application of genetic tools, including our ability to examine ancient DNA, has now revolutionised our ability to investigate these processes. The recent human settlement of the Pacific, particularly in New Zealand, provides a unique, accessible system for revealing anthropogenic impacts on native biota. In this thesis I use genetic analyses from modern, historic and subfossil DNA to investigate tempo

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17

Green, Jonathan Andrew. "The behaviour and energetics of macaroni penguins (Eudyptes chrysolophus)." Thesis, University of Birmingham, 2001. http://etheses.bham.ac.uk//id/eprint/4758/.

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Heart rate (f\(_H\)) and rate of oxygen ( V\(_{O2}\) consumption were recorded from adult macaroni penguins while exercising on a treadmill. No differences were found in the relationship between f\(_H\) and V\(_{O2}\) in breeding and moulting female penguins, but a significant difference was found between male and female penguins. These relationships were used to estimate field metabolic rate (FMR) for free-ranging female penguins, which were implanted with heart rate and temperature data loggers. While foraging to provision their chick, FMR was 8.92 ± 0.44 W kg\(^{-1}\) and 9.07 ± 0.42 W kg\(

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18

Whittington, Phil 1958. "Survival and movements of African Penguins, especially after oiling." Doctoral thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/4366.

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19

Campbell, Kamahl. "An investigation of an infection with a protozoan parasite causing mortalities in Little Penguins (Eudyptula minor) on Penguin Island, Western Australia." Thesis, Campbell, Kamahl (2015) An investigation of an infection with a protozoan parasite causing mortalities in Little Penguins (Eudyptula minor) on Penguin Island, Western Australia. Masters by Research thesis, Murdoch University, 2015. https://researchrepository.murdoch.edu.au/id/eprint/28175/.

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Since at least 2001, routine post mortems of deceased penguins from Penguin Island, Western Australia, have been conducted at Murdoch University Veterinary Hospital (MUVH). In late 2011 and early 2012, a cluster of 12 cases presented with similar and characteristic gross and microscopic changes, namely birds in good body condition with hepatomegaly and splenomegaly, multifocal hepatic and splenic necrosis and numerous, small, 1-2μm diameter protozoan parasites within the necrotic foci. A review of earlier reports in the MUVH archive identified isolated similar cases from 2006 and 2008, which h

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20

Stone, Derik M. "Aggressive behavior of female and male magellanic penguins (spheniscus magellanicus) nesting at San Francisco Zoo, San Francisco, California." Scholarly Commons, 2000. https://scholarlycommons.pacific.edu/uop_etds/538.

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Between 15 March and 29 July 1998 we quantified aggressive movements (AMs) in a breeding colony of 44 adult magellanic penguins (MPs) during their nesting season at San Francisco Zoo (SFZ). We sampled their behavior for a total of 149.5 hrs in 46 sessions of 195 min each, all starting at 0945 hrs and stopping at 1300 hrs. We recognized 4 types of AMs, of which 2 (eye-pointing and charging) were threat signals, I (bill-fencing) was a ritualized contest of strength and agility, and I (biting) was physical attack. MPs only performed AMs within 2-3 m of nest entrances. Males performed 83% of all A

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21

Cassady, St Clair Colleen. "Mechanisms of brood reduction in Fiordland crested penguins (Eudyptes pachyrhynchus)." Thesis, University of Canterbury. Zoology, 1990. http://hdl.handle.net/10092/6953.

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Mechanisms of brood reduction were studied in Fiordland crested penguins (Eudyptes pachyrhynchus) on Open Bay Islands from July through October 1989. I quantified behavioural and environmental causes of egg and chick loss at the time of laying, during incubation, and after hatching to evaluate hypotheses advanced to explain the unique patterns of hatching asynchrony and egg dimorphism in eudyptid penguins. Although first eggs experienced lower survival than second eggs and most losses occurred during the laying interval, aggression between adult penguins did not appear to contribute to egg lo

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22

Botes, Annelise. "Immunological and epidemiological investigations in South African ostriches and penguins." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/53747.

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Dissertation (PhD)--University of Stellenbosch, 2004<br>ENGLISH ABSTRACT: Newcastle disease (NO) and mycoplasma infections in ostriches have considerable economic implications for the South African ostrich industry in that NO is a limiting factor in the export of ostrich products to the European Union and mycoplasma infections cause stock losses, reduced production, reduced hatchability and downgrading of carcasses. In the first section of this dissertation, the role of passively acquired and mucosal immunity in protection of ostrich chicks against Newcastle disease virus (NOV) was inve

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23

Cresswell, Katherine A. "Behavioural models of penguins and krill in the Southern Ocean." Thesis, Open University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427734.

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24

Pütz, Klemens. "Untersuchungen zur Ernährungsökologie von Kaiserpinguinen (Aptenodytes forsteri) und Königspinguinen (Aptenodytes patagonicus) = Aspects of the feeding ecology of Emperor Penguins (Aptenodytes forsteri) and King Penguins (Aptenodytes patagonicus) /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1994. http://www.gbv.de/dms/bs/toc/153239980.pdf.

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25

Handley, Jonathan Murray. "Foraging ecology of gentoo penguins pygoscelis papua at the Falkland Islands." Thesis, Nelson Mandela University, 2017. http://hdl.handle.net/10948/14113.

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Marine top predators often occupy broad geographical ranges that encompass varied habitats. Therefore, a pre-requisite towards conserving these animals is to determine the components of their realized niche, and investigate whether a species is a specialist or a generalist. For generalist species, it is also necessary to understand if local specialisation occurs. Uncovering these components can allow us to build models of a species realized niche that may then be used to infer habitat use in unsampled locations. However, fully understanding the components of a marine top predators realized nic

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26

Waas, Joseph Rupert. "Agonistic and sexual communication in the little blue penguins, Eudyptula minor." Thesis, University of Canterbury. Zoology, 1988. http://hdl.handle.net/10092/5827.

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The little blue penguin, Eudyptua minor, was used to examine three specific issues in animal communication. (1) Ethologists have traditionally viewed social repertoires as being fixed and invariable. In contrast, my analysis of agonistic behaviour of little blue penguins occupying two different habitats revealed significant variation in repertoire size and form. Cave-dwellers, which had large and complex repertoires, occupied open colonies characterized by high interaction rates. Burrow-dwellers, which had small repertoires, occupied colonies in which conspecifics were isolated from one anoth

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Naude, Vincent Norman. "Prevalence and drivers of blood parasitism in African penguins (Spheniscus demersus)." Bachelor's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/12924.

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Includes bibliographical references.<br>In the past decade African penguin (Spheniscus demersus) populations have experienced declining population sizes of > 60% in some instances. This has primarily been attributed to shifting prey availability and competition with regional purse-seine fisheries; however, possible novel threats exacerbated by diminishing population sizes and increased stress, may also be important contributors to the regional persistence of the species. These threats include the impacts of arthropod-borne blood parasites on the health of penguin populations. While parasitism

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28

Thiart, Hanlie. "Immunological and epidemiological investigations into avian malaria in the African penguin during rehabilitation and in breeding colonies." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/16620.

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Thesis (MSc)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: The African penguin, which occurs along the south-eastern and south-western shores of South-Africa and Namibia, has experienced a severe reduction in population numbers due to guano and egg collection in the first half of the 19th century, and oil pollution in the second half of the 19th century as a result of oil tankers rounding the Cape of Good Hope. The population would have been reduced by a further 19% had it not been for the rehabilitation of penguins at the South African National Council for the Conservation of

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29

Mårtensson, Anders. "Flying Penguins : Building and Evaluating the Viability of a Linux-based Drone." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12860.

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Traditional quadcopter flight controllers use microcontrollers to run the code that keeps the drone in the air, and when more processing power or versatility is needed the same microcontrollers are used in tandem with Linux-based single-board computers. It would be cheaper and reduce complexity if the single-board computer could entirely replace the microcontrollers. We investigate whether it is possible to run a quadcopter using a Linux single-board computer as the flight controller, with no microcontrollers and otherwise the same hardware as used in hobby-grade quadcopters. We attempt to fin

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30

Taylor, Sabrina Simone. "Parental care during incubation and chick-rearing in Humboldt penguins, Spheniscus humboldti." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0034/MQ66588.pdf.

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31

Grilo, Miguel Luca Augusto. "Characterization of infection by malaria parasites in penguins housed in zoological collections." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2014. http://hdl.handle.net/10400.5/7505.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Avian malaria is, if not the main, one of the most important causes of mortality in penguins housed in zoological collections. Knowledge of prevalence in zoos and the control measures applied (diagnostic, treatment and prophylaxis) allows other zoos to increase their colonies protection. In order to evaluate malaria infection in penguin colonies and zoos prophylactic programs, a survey was specifically designed to gather this information from different zoological gardens from Europe, North America and Asia. Fifteen out of the forty

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32

Hart, Tom. "Aspects of the ecology of macaroni penguins (Eudyptes chrysolophus) around South Georgia." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5667.

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Macaroni penguins (Eudyptes chrysolophus Brandt) feed when diving during long foraging trips away from their breeding colony. Their foraging behaviour is constrained by a number of factors including their physiology, their condition, the condition of their partner, and the condition of their chick. This thesis concerns aspects of their foraging ecology in relation to prey availability. Time Depth Recorders and other archival tags are increasing in their capacity, battery life and durability at the same time as getting cheaper and smaller and are frequently used to explore foraging behaviour. H

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33

Whitehead, Thomas Otto. "Comparative foraging ecology of macaroni and rockhopper penguins at the Prince Edward Islands." Doctoral thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/27338.

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Penguins are one of the largest consumers of marine resources in the Southern Ocean and spend most of their lives at sea. Although the last four decades have seen technological advancements that have considerably 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 ecological relationships between sympatric species. Being flightless, travel is slower and more costly

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Tol, Leanne. "Factors impacting the breeding success of African penguins Spheniscus demersus on Robben Island." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20873.

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The African penguin Spheniscus demersus is a seabird endemic to the south-western coast of Africa and can be found in three main breeding localities; southern Namibia, the Western Cape and Algoa Bay, Eastern Cape, South Africa. The African penguin has been listed as Endangered since 2010, having experienced a decline in population of more than 50% over the past three generations. This study was conducted at the breeding colony on Robben Island, South Africa, and examined two factors that have the potential to affect breeding success of African penguins; body mass at the onset of breeding and

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Hampton, Shannon. "A preliminary investigation into effects of flipper banding on African penguins spheniscus demersus." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/6265.

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Includes abstract.<br>Includes bibliographical references.<br>Much of what is known about penguin movements and life history traits, including their population dynamics, and particularly the rehabilitation success after oil spills results from information derived from marking birds with flipper bands. However, flipper bands may negatively impact the welfare of penguins. While studies on the impact of banding have been undertaken for several penguin species, no such study has investigated the exclusive effect of banding on African Penguins Spheniscus demersus. I do so by comparing the differenc

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Olsson, Evelina, and Ida Stjerna. "“They’re not that different from us, really” : En analys om hur kejsarpingviner representeras i två naturfilmer." Thesis, Högskolan Dalarna, Bildproduktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:du-31632.

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Syftet med uppsatsen är att undersöka och analysera hur kejsarpingviner representeras i naturfilmerna March of the Penguins (2005) och Snow Chick: A Penguin's Tale (2015). Uppsatsen fokuserar främst på hur föreställningar om genus och mänskliga normer om familjestrukturer syns i filmerna samt hur kejsarpingvinernas relation och beteenden till varandra representeras. Vi använder genus som den teoretiska utgångspunkten i uppsatsen. De filmer som analyseras är March of the Penguins och Snow Chick: A Penguin’s Tale. Vi analyserar filmerna utifrån Roland Barthes semiotiska teori genom begreppen den

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Handley, Jonathan Murray. "Diet and foraging distribution of gentoo penguins pygoscelis papua at Cow Bay, Falkland Islands." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020377.

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Knowledge of diet and distribution in marine top predators is critical in interpreting their ecological role. Furthermore, this information is required for effective management and conservation of these species. For gentoo penguins at the Falkland Islands a previous overlap in dietary items with commercial fisheries was recognised. Despite this the at-sea distribution has been poorly studied and only at a few localities. Therefore, this thesis looks to broaden the knowledge of foraging ecology for gentoo penguins at another site in the archipelago, Cow Bay. The aim was firstly, through stomach

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Huyser, Onno Adrian Wallace. "Diet and foraging behaviour of Macaroni and Chinstrap penguins at Bouvetøya, South Atlantic Ocean." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/4751.

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Thier, Katrin. "Of picts and penguins – Celtic Languages in the New Edition of the Oxford English Dictionary." Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1932/.

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Extract: [...]The New English Dictionary, later to become the Oxford English Dictionary, was first published between 1884 and 1928. To add new material, two supplements were issued after this, the first in 1933, and another, more extensive one between 1972 and 1986. In 1989, the Oxford English Dictionary, second edition (OED2) was published, which integrated the material from the original dictionary and the supplements into a single alphabetical sequence. However, virtually all material contained in this edition still remained in the form in which it was originally published. This is the editi

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Horswill, Catharine. "The relative importance of opposing drivers in determining population change in macaroni penguins Eudyptes chrysolophus." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/5979/.

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It is widely recognised that both nutrient-driven processes acting from the “bottom-up” and predator-driven processes acting from the “top-down” are important drivers of population change. However, studies that examine how these joint forces influence the population dynamics of oceanic species are lacking. In the Antarctic and Sub-Antarctic ecosystem, human-mediated changes have driven biological change at both ends of the food chain; rapid regional warming at the bottom and heavy exploitation of apex predator populations at the top. Consequently, many populations of marine predators have rapi

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Saraux, Claire. "Response of penguins to environmental changes across the Southern ocean : from individuals to population trends." Strasbourg, 2011. http://www.theses.fr/2011STRA6192.

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Le changement climatique, dorénavant sans équivoque, devrait se poursuivre voire s’amplifier dans les siècles à venir, affectant profondément la composante biologique de notre planète. Il est donc nécessaire et urgent de mieux comprendre les écosystèmes et leurs réponses face au changement climatique. Au cours de cette thèse, j’ai étudié l’effet du climat dans l’Océan Austral au travers des manchots. Ceux-ci sont souvent considérés comme de bons indicateurs de leurs écosystèmes de part leur position au sommet de la chaîne trophique. Ce travail repose sur des données pluriannuelles collectées s

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Wienecke, Barbara C. "The size and breeding patterns of Little Penguins Eudyptula minor in Australia: A comparative study." Thesis, Wienecke, Barbara C. (1993) The size and breeding patterns of Little Penguins Eudyptula minor in Australia: A comparative study. PhD thesis, Murdoch University, 1993. https://researchrepository.murdoch.edu.au/id/eprint/53080/.

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The breeding regime of Little Penguins Eudyptula minor was studied on Penguin Island, Western Australia, from January 1990 to December 1992. Data from 1986 to 1989 were also available for analysis. Little Penguins at Penguin Island laid eggs over a very protracted period, which commonly extended from late April to early November. Two peaks of laying occurred in several of the years studied. The onset of first laying was strongly influenced by temperatures over 30° C but was independent of breeding success in the previous season. Body condition in adults was correlated with total rainfall, poss

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Stedt, Johan. "Parasitizing behavior of Ixodes uriae ticks on Chilean Magellanic penguin (Spheniscus magellanicus) and their importance as pathogen vectors." Thesis, Högskolan i Kalmar, Naturvetenskapliga institutionen, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-2356.

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Ticks are vectors for a larger number of viruses and bacteria than all other arthropod taxa, including mosquitoes. In Europe is it foremost Borrelia spirochetes and the Flavivirus Tick-borne Encephalitis virus that cause disease in humans. In this study, the tick species Ixodes uriae has been studied. I. uriae have a circumpolar distribution in both hemisphere and can be found both in Arctic and Antarctica. I collected ticks from Magellanic penguins in south Chile and analyzed them to see if they carry Borrelia spirochetes or Flavivirus. Totally were 218 ticks collected from 165 controlled pen

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Acosta, Igor da Cunha Lima. "Pesquisa de coccídios da família Sarcocystidae em pinguins-de-magalhães (Spheniscus magellanicus) encalhados na costa brasileira." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/10/10134/tde-06022018-145818/.

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O gênero Sarcocystis é constituído por várias espécies que se diferenciam pelas características morfológicas, biológicas e moleculares. Foram relatadas mais de 196 espécies encontradas em mamíferos, aves e répteis e somente 26 dessas espécies possuem o ciclo completo conhecido. Toxoplasma gondii é um parasito intracelular obrigatório, com distribuição geográfica cosmopolita, capaz de infectar uma ampla variedade de mamíferos e aves, inclusive o homem, caracterizando seu potencial zoonótico. Nas últimas décadas, a quantidade de pinguins vindos da Patagônia argentina e chilena, região de nascime

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Dehnhard, Nina [Verfasser]. "Adaptations to a variable environment - feeding ecology, survival and physiology of southern rockhopper penguins / Nina Dehnhard." Konstanz : Bibliothek der Universität Konstanz, 2013. http://d-nb.info/1088447554/34.

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Scheffer, Annette. "Foraging behaviour of king penguins (Aptenodytes patagonicus) in relation to oceanography at South Georgia and Kerguelen." Thesis, Open University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.590808.

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Understanding the levels of variability in oceanographic features where marine predators forage is critical for understanding variability in an animal's foraging behaviour and reproductive success, and for assessing their potential reactions to environmental change. In this thesis, I examine the foraging behaviour of king penguins (Aptenodytes patagonicus) in relation to oceanographic features in both horizontal and vertical dimensions. I used ARGOS and Global Positioning System tracking data combined with Time-Depth-Temperature-Recorder data to follow the at-sea movements for penguins breedin

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Hibbets, Eric Matthew. "Molecular Characterization of Hybridization Between Magellanic (Spheniscus magellanicus) and Humboldt (Spheniscus humboldti) Penguins in the Wild." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1562071641076803.

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Campbell, Katrina. "Factors influencing the foraging behaviour of African Penguins (Spheniscus demersus) provisioning chicks at Robben Island, South Africa." Doctoral thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/23050.

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Urgent and effective conservation is needed to halt the declines of endangered African Penguins. A purse-seine fisheries closure zone was in place out to 20 km around Robben Island for three years. It provided an opportunity to investigate penguin foraging behaviour in relation to estimated local prey abundance and other factors without the confounding variable of local fishing. Penguins provisioning chicks were equipped with GPS temperature depth devices for a foraging trip. Dive data (N = 75) and GPS tracks (N = 78) were collected from 78 penguins. Of those, 14 penguins were at-sea within tw

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Levenson, David H. "The visual pigments of diving tetrapods : genetic and electroretinographic investigations of pinnipeds, cetaceans, sea turtles, and penguins /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3120446.

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Hernandez, Santibanez I. "Space and politics in the 'Penguins' movement : geographies of the political construction of the Chilean student movement." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1549607/.

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In 2006, Chilean secondary students, known as the Penguins because of their black and white school uniform, mobilised across the country to demand that education should be a right, not a privilege. Notwithstanding the political and academic debate they triggered regarding an unresolved agenda of equity and quality education, scholarship relating to the Penguins has been limited to analysing their external consequences. They remain a ‘failed’ student movement, since their demands were met with only limited technocratic reforms. This thesis examines the Penguins’ movement as a constructive proce

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