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Rozprawy doktorskie na temat „Introduced birds”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Allen, Sophy Elizabeth. "The effect of population bottleneck size on parasitic load and immunocompetence of introduced birds in New Zealand." Thesis, University of Canterbury. Biological Sciences, 2008. http://hdl.handle.net/10092/1951.

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I investigated parasitic infection and immunocompetence in populations of introduced bird species in New Zealand (NZ) that had experienced a range of population bottlenecks (11-808 individuals), and compared these parameters to non-bottlenecked conspecifics in the United Kingdom (UK). My aims were two-fold; firstly to assess if population bottlenecks are linked to increased parasite loads and/or decreased immunocompetence, and secondly, to assess at what severity of bottleneck these effects become evident. I found that ectoparasite load (chewing lice, Order: Phthiraptera, Sub-Orders: Amblyce

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Cassey, Phillip, and n/a. "Comparative Analyses of Successful Establishment Among Introduced Land Birds." Griffith University. Australian School of Environmental Studies, 2002. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030915.094001.

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Humankind has redistributed a large number of species outside their native geographic ranges. Although the majority of introduction attempts fail to establish populations, the cumulative negative effect of successful non-native species has been and will continue to be large. Historical records of land bird introductions provide one of the richest sources of data for testing hypotheses regarding the factors that affect the successful establishment of non-native populations. However, despite comprehensive summaries of global avian introductions dating back two decades only very recent studies ha

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Cassey, Phillip. "Comparative Analyses of Successful Establishment Among Introduced Land Birds." Thesis, Griffith University, 2002. http://hdl.handle.net/10072/366398.

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Humankind has redistributed a large number of species outside their native geographic ranges. Although the majority of introduction attempts fail to establish populations, the cumulative negative effect of successful non-native species has been and will continue to be large. Historical records of land bird introductions provide one of the richest sources of data for testing hypotheses regarding the factors that affect the successful establishment of non-native populations. However, despite comprehensive summaries of global avian introductions dating back two decades only very recent studies ha

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Pedersen, Simen. "Effects of native and introduced cervids on small mammals and birds." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15935.

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Cervids are a widespread family of ungulates, native to the Americas, Europe and Asia and introduced to Australia. Densities of cervids have increased in North America, Europe and Japan during the last couple of decades, due to changes in land use, reduced hunting, lack of large carnivores and changes in management practices. Where they occur at high densities, native and introduced cervids may have profound effects on vegetation, causing knock-on effects on other taxa. Cervids are in some instances managed towards changing the local distribution through supplemental feeding. These supplementa

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5

Burrows, Ben Robert. "Do Severe Genetic Bottlenecks Lead to Greater Reproductive Failure?" Thesis, University of Canterbury. Biological Sciences, 2006. http://hdl.handle.net/10092/1344.

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It is generally accepted that populations which experience severe bottlenecks have a reduction in fitness. One of the most frequently reported fitness costs is increased hatching failure in bottlenecked populations of birds. The mechanism responsible for increased hatching failure is unknown. Research on other animals suggest that reduced population numbers cause unavoidable inbreeding that in turn leads to abnormalities in the gametes. In this thesis I examine some of the possible causes for increased hatching failure in severely bottlenecked populations of introduced birds in New Zealand. I

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Debruyne, Christine Anne. "Fluctuating asymmetry and body morphology in relation to population bottlenecks of introduced birds in New Zealand." Thesis, University of Canterbury. Biological Sciences, 2008. http://hdl.handle.net/10092/3326.

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The introduction of exotic bird species to New Zealand (NZ) from the United Kingdom (UK) over 100 years ago unintentionally created an ideal study system to examine potential changes in developmental stability due to bottleneck effects. In this study I measured fluctuating asymmetry (FA; random deviations from symmetry between bilaterally symmetrical traits) in 13 species of introduced birds in NZ. FA has been used for conservation purposes as an early warning system of increased developmental instability (DI; the inability to cope with random genetic or environmental perturbations during deve

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7

Taylor, Sabrina S., and n/a. "The genetic and conservation consequences of species translocations in New Zealand saddlebacks and robins." University of Otago. Department of Zoology, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070118.101358.

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Species translocations result in demographic bottlenecks that may produce inbreeding depression and reduce genetic variation through random sampling and drift, an outcome that could decrease long-term fitness and adaptive potential of many New Zealand species. Despite considerable evidence for costs associated with inbreeding and reduced genetic variation, some species have recovered from a small number of individuals and are thriving, perhaps via high growth rates, differential survival of heterozygous individuals or inbreeding avoidance. I examined the genetic consequences of species translo

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Wilkin-Slaney, Katherine. "Becoming - Pakeha questioning the use of native birds in representation as a means of exploring New Zealand post-settler identity in visual art : an exegesis submitted to Auckland University of Technology for the degree of Master of Art and Design, 2008 /." Click here to access this resource online, 2008. http://hdl.handle.net/10292/723.

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The depiction of birds by artists such as Don Binney, Bill Hammond, Michael Parekowhai and Grant Whibley has served as metaphors in the conceptual systems of post-settler New Zealanders’ expression of identity. This project investigated unease in New Zealand post-settler identity and its dislocation from the past by considering works depicting native birds. Is depicting native - rather than introduced birds, an incongruous and romantic settler iconography in identity, leading to a re-telling of our place in this land at the expense of not only the rightful indigenous place of Maori, but of our

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Michel, Pascale, and n/a. "Habitat selection in translocated bird populations : the case study of Stewart Island robin and South Island saddleback in New Zealand." University of Otago. Department of Zoology, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070118.143501.

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The choice of a place to live and reproduce is crucial for species� survival in providing them with adequate resources and shelter from predators or climatic conditions. Determining habitat suitability in endangered species is important for the success of translocation as a conservation tool. In addition, understanding mechanisms (source/sink system versus ecological traps) that drive habitat selection in translocated animals may be critical to population viability. In New Zealand, where ecosystems are highly vulnerable to extinction, habitat restoration on predator-free off-shore islands is a

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Impson, F. A. C. "Biological control of Acacia cyclops in South Africa : the role of an introduced seed-feeding weevil, Melanterius servulus (Coleoptera: Curculionidae), together with indigenous seed-sucking bugs and birds." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/6272.

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Includes bibliographical references (leaves 78-94).<br>Acacia cyclops A. Cunn ex G. Don, or rooikrans (Fabaceae), of Australian origin, is an invasive environmental weed in South Africa where it threatens the unique vegetation of the Cape Floral Kingdom. The invasiveness of the plant in South Africa is, in part, due to its high annual seed-yields, together with the suitable climatic and edaphic factors found here. This study investigated the role of a seed-feeding weevil, Melanterius servulus, which was first introduced into South Africa during 1991, as a biological control agent of A. cyclops

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MacFarlane, Archie. "Frugivorous mutualisms in a native New Zealand forest : the good the bad and the ugly." Thesis, University of Canterbury. Biological Sciences, 2012. http://hdl.handle.net/10092/7636.

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Widespread anthropogenic invasions have prompted concerns that naturalized organisms could threaten biodiversity. In particular, invasive weeds can negatively affect native biota through a variety of means, including disrupting mutualisms. This thesis was designed to observe and test dispersal mutualisms in a native forest during autumn when the majority of plant species are fruiting. In this thesis I examined whether the invasive plant barberry (Berberis glaucocarpa) was influencing the behaviour of a native frugivore bellbird (Anthornis melanura) and a range of dispersal related services i

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Sjöberg, Göran. "Nesting and migration in the introduced Canada goose in Sweden." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-101357.

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The aim of the thesis was to document patterns in breeding and migration in Swedish Canada geese Branta canadensis, to explain these against the genetic and historical background of the population, and to test predictions of hypotheses pertaining to parental investment. The Canada goose population in Sweden was founded by the introduction of a few individuals in the 1930's. DNA fingerprint similarity between geese breeding in Sweden was on average at the same level as between inbred close relatives in other wild bird species. The genetic variability of the population appeared to be considerabl

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13

Congdon, Nicola Maree. "Life-history traits and potential causes of clutch-size decline in the introduced song thrush (Turdus philomelos) in New Zealand." Thesis, University of Canterbury. School of Biological Sciences, 2010. http://hdl.handle.net/10092/3954.

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The song thrush (Turdus philomelos) was introduced to New Zealand from Britain during the mid 19th century and has become one of the most common terrestrial bird species in New Zealand. In this study, I surveyed a range of life-history traits in New Zealand song thrushes for comparison with traits of British thrushes. Clutch size, egg size and nest size have decreased, while the nestling period is shorter and the incubation period longer. This combination of changes suggests birds are investing less energy into each reproductive bout. Birds also appear unable to raise large broods, as nestling

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14

Mathys, Blake. "Morphological evolution of birds recently introduced to islands patterns of diversification /." 2010. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052136.

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Coelho, Ana Isabel Cavaco Pinto. "The dispersal of native and introduced seeds by São Tomé forest birds." Master's thesis, 2016. http://hdl.handle.net/10451/27357.

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Tese de mestrado, Biologia da Conservação, Universidade de Lisboa, Faculdade de Ciências, 2016<br>Com a população mundial a aumentar, os impactos antropogénicos nos ecossistemas naturais vão sendo cada vez mais evidentes. Assistimos actualmente a uma elevada taxa de extinção de espécies, e com elas se perdem as funções e os serviços ecossistémicos que prestam, deixando os ecossistemas mais vulneráveis às pressões humanas. Uma dessas funções, essencial à manutenção da dinâmica florestal, é a dispersão de sementes, que nos trópicos é feita essencialmente através de relações mutualistas entre pla

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16

Lewis, Keith P. "Processes underlying nest predation by introduced red squirrels (Tamiasciurus hudsonicus) in the boreal forest of Newfoundland /." 2004.

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