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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Microsatellite-based genetic profiling for the management of wild and captive flamingo populations.

Kapil, Richa 12 1900 (has links)
Flamingo species generate tremendous interest whether they are small captive groups or wild populations numbering in the thousands. Genetic pedigrees are invaluable for maintaining maximum genetic diversity in captive, as well as wild, populations. However, presently there is a general lack of genetic data for flamingo populations. Microsatellites are loci composed of 2-6 base pair tandem repeats, scattered throughout higher eukaryotic genomes, often exhibiting high levels of polymorphism and heterozygosity. These loci are thus important genetic markers for identity, parentage and population studies. Here, six microsatellite loci were isolated from a microsatellite-enriched Caribbean flamingo partial genomic library. Two are compound complex repeats and four are perfect trinucleotide repeats. Each locus was amplified from Caribbean, African greater, Chilean and lesser flamingo genomic DNAs. Heterozygosity frequencies were calculated for Caribbean (range 0.12-0.90) and African greater flamingos (range 0.23-0.94) loci. All six microsatellite loci were found to be in Hardy-Weinberg equilibrium and linkage disequilibrium analyses did not suggest linkage for any pair of two greater flamingo subspecies (African and Caribbean) loci. At least five of the loci also exhibit polymorphism in Chilean and lesser flamingos, but due to small sample numbers, relevant allele/heterozygosity frequency calculations could not be estimated. Nucleotide sequence comparisons of the amplicons derived from the four flamingo groups reveal a high level of sequence conservation at all loci. Although small sample numbers again limit the data for lesser flamingos and to some degree for the Chilean birds, the sequences of the two greater flamingo subspecies were identical and the number of nonconserved nucleotides appears to be higher for lesser/greater comparisons than for Chilean/greater comparisons. This is consistent with Chilean flamingos being a different species within the same genus as the greater flamingos, while lesser flamingos belong to a separate genus. Parentage analyses on suggested African greater flamingo family groups from Disney's Animal Kingdom's collection were performed using microsatellite data. Results confirmed many suggested family groups but in other cases one or more of the suggested parents were clearly excluded. The six microsatellite loci isolated provide a new population management tool useful for both wild and captive flamingo populations.
2

Pairing in captive chilean flamingos as a function of social separation methods

Reinertsen, Megan E. 05 1900 (has links)
No description available.
3

Isolation and Characterization of Polymorphic Loci from the Caribbean Flamingo (Phoenicopterus ruber ruber): New Tools for Wildlife Management

Preston, E. Lynn 12 1900 (has links)
Methods to determine genetic diversity and relatedness within populations are essential tools for proper wildlife management. Today the approach of choice is polymerase chain reaction-based microsatellite analysis. Seven new polymorphic loci were isolated from a microsatellite-enriched Caribbean flamingo genomic library and used to characterize survey populations of Caribbean and African greater flamingos. In addition, four of these loci were used to verify parentage relationships within a captive-breeding population of African greater flamingos. Parentage predictions based upon gamekeeper observations of breeding and nesting did not always agree with genetic-based parentage analyses of the nine suggested family groups. Four family groups were supported (groups I, II, III and VI) by there results. However, an analysis of the remaining five suggested groups, with a total of eight offspring/dam and eight offspring/sire suggested relationships, yielded seven exclusions of the suggested dam and six exclusions of the suggested sire. This put the overall suggested dam exclusion rate at 35% and exclusion rate for suggested sires at 29%. Although the keeper observation data for our family groups must be considered a variable of concern at this time, these findings are certainly suggestive that more carefully controlled studies may reveal that flamingos are not monogamous as long accepted, but rather socially monogamous or even promiscuous. Thus we have now been able to both characterize and demonstrate the utility of our polymorphic microsatellite loci. We hope these results will interest additional wildlife facilities in further parentage and behavioral studies that will collectively aid to improve monitoring and maintenance of genetic diversity, and as provide better insight into breeding habits of both wild and captive populations.
4

Recevoir l’irrecevable : postures du spectateur dans Pink Flamingos (John Waters, 1972)

Molaison, Nathaël 20 April 2018 (has links)
Je m’intéresse à la figure du spectateur prévue par le film, à partir des travaux de Francesco Casetti, Roger Odin, Umberto Eco et Martin Lefebvre. Mon objectif est de montrer que la figure du spectateur est plurielle. Dans cette perspective, nous verrons que tout film fait une offre à son spectateur, mais que celui-ci y répond de manières différentes selon le contexte dans lequel il voit le film et les positions éthiques qu’il fait siennes. Le film Pink Flamingos, de John Waters (1972), cherche, par tous les moyens, à provoquer la sensation d’un dégoût intéressant. Il s’inscrit en faux contre l’institution du film de fiction traditionnel, puisqu’il propose au spectateur d’« interagir » avec lui. Nous verrons toutefois que cette proposition implique une distinction entre, pour simplifier, un « bon » et un « mauvais » spectateur, selon qu’il soit ou non participatif.

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