{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/85398"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/85398","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The Genetic Consequences of Fragmentation and Small Population Size in Two Grassland Bird Species: The Greater Rhea and the Greater Prairie Chicken","abstract":"\"In addition, genetic analysis of four extant populations of the greater prairie chicken and museum specimens from a prebottlenecked population along with ecological data on population fitness allowed me to directly assess the effects of a demographic bottleneck on the genetic diversity and fitness of a natural population. Microsatellite analysis of current populations showed that Illinois prairie chickens, which have undergone an extreme demographic contraction and an associated decline in population fitness, had the lowest estimate of mean heterozygosity per locus and approximately 2/3 the allelic diversity, sharing 95-100% of all their alleles with each of 3 other populations that have no known bottleneck history or associated declines in fitness. This finding suggests that the Illinois prairie chickens originally had higher levels of genetic diversity that were consequently lost through an extreme demographic contraction. These results were further supported by the DNA analysis of museum specimens of Illinois prairie chickens collected in the 1930s and 1960s, which revealed the loss of specific alleles (known to have been present earlier in this century) following the demographic contraction. In addition to most of the currently extant alleles, I identified in museum specimens 9 alleles not present in the current Illinois population. These \"\"lost\"\" alleles included both common alleles present in all other populations and others unique to the Illinois population.\"","abstract_html":""In addition, genetic analysis of four extant populations of the greater prairie chicken and museum specimens from a prebottlenecked population along with ecological data on population fitness allowed me to directly assess the effects of a demographic bottleneck on the genetic diversity and fitness of a natural population. Microsatellite analysis of current populations showed that Illinois prairie chickens, which have undergone an extreme demographic contraction and an associated decline in population fitness, had the lowest estimate of mean heterozygosity per locus and approximately 2/3 the allelic diversity, sharing 95-100% of all their alleles with each of 3 other populations that have no known bottleneck history or associated declines in fitness. This finding suggests that the Illinois prairie chickens originally had higher levels of genetic diversity that were consequently lost through an extreme demographic contraction. These results were further supported by the DNA analysis of museum specimens of Illinois prairie chickens collected in the 1930s and 1960s, which revealed the loss of specific alleles (known to have been present earlier in this century) following the demographic contraction. In addition to most of the currently extant alleles, I identified in museum specimens 9 alleles not present in the current Illinois population. These ""lost"" alleles included both common alleles present in all other populations and others unique to the Illinois population."","abstract_has_math":false,"creators":["Bouzat, Juan Luis"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":["Paige, Ken N.","Robinson, Scott K."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T22:43:05Z","date_published":"2015-09-25T22:43:05Z","updated_at":"2026-07-22T22:26:25Z","subjects":["Biology, Zoology"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9834655"],"render_values":[{"text":"(MiAaPQ)AAI9834655","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/85398","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Paige, Ken N.","Robinson, Scott K."]},{"key":"dc:creator","label":"Author","values":["Bouzat, Juan Luis"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T22:43:05Z","10000-01-01","1998"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology, Zoology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/85398","(MiAaPQ)AAI9834655"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"In addition, genetic analysis of four extant populations of the greater prairie chicken and museum specimens from a prebottlenecked population along with ecological data on population fitness allowed me to directly assess the effects of a demographic bottleneck on the genetic diversity and fitness of a natural population. Microsatellite analysis of current populations showed that Illinois prairie chickens, which have undergone an extreme demographic contraction and an associated decline in population fitness, had the lowest estimate of mean heterozygosity per locus and approximately 2/3 the allelic diversity, sharing 95-100% of all their alleles with each of 3 other populations that have no known bottleneck history or associated declines in fitness. This finding suggests that the Illinois prairie chickens originally had higher levels of genetic diversity that were consequently lost through an extreme demographic contraction. These results were further supported by the DNA analysis of museum specimens of Illinois prairie chickens collected in the 1930s and 1960s, which revealed the loss of specific alleles (known to have been present earlier in this century) following the demographic contraction. In addition to most of the currently extant alleles, I identified in museum specimens 9 alleles not present in the current Illinois population. These \"\"lost\"\" alleles included both common alleles present in all other populations and others unique to the Illinois population.\"","Made available in DSpace on 2015-09-25T22:43:05Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9834655.pdf: 5338797 bytes, checksum: d2d1651bf1883207be9dd5fe30449ef7 (MD5) Previous issue date: 1998","Embargo set by: Seth Robbins for item 86679 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","111 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998."]},{"key":"dc:title","label":"Title","values":["The Genetic Consequences of Fragmentation and Small Population Size in Two Grassland Bird Species: The Greater Rhea and the Greater Prairie Chicken"]}]}],"canonical_facts":{"dc:contributor":["Paige, Ken N.","Robinson, Scott K."],"dc:creator":["Bouzat, Juan Luis"],"dc:date":["2015-09-25T22:43:05Z","10000-01-01","1998"],"dc:description":["\"In addition, genetic analysis of four extant populations of the greater prairie chicken and museum specimens from a prebottlenecked population along with ecological data on population fitness allowed me to directly assess the effects of a demographic bottleneck on the genetic diversity and fitness of a natural population. Microsatellite analysis of current populations showed that Illinois prairie chickens, which have undergone an extreme demographic contraction and an associated decline in population fitness, had the lowest estimate of mean heterozygosity per locus and approximately 2/3 the allelic diversity, sharing 95-100% of all their alleles with each of 3 other populations that have no known bottleneck history or associated declines in fitness. This finding suggests that the Illinois prairie chickens originally had higher levels of genetic diversity that were consequently lost through an extreme demographic contraction. These results were further supported by the DNA analysis of museum specimens of Illinois prairie chickens collected in the 1930s and 1960s, which revealed the loss of specific alleles (known to have been present earlier in this century) following the demographic contraction. In addition to most of the currently extant alleles, I identified in museum specimens 9 alleles not present in the current Illinois population. These \"\"lost\"\" alleles included both common alleles present in all other populations and others unique to the Illinois population.\"","Made available in DSpace on 2015-09-25T22:43:05Z (GMT). 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