Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus)
Thesis (Master, Biology) -- Queen's University, 2012-09-28 14:02:24.007 Characterizing the population genetic structure of a species can provide insight into isolating effects of local adaptation and genetic drift, and homogenizing effects of gene flow. The relative interplay between gene flow...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Thesis |
Language: | English |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/1974/7556 |
id |
ftqueensuniv:oai:https://qspace.library.queensu.ca:1974/7556 |
---|---|
record_format |
openpolar |
spelling |
ftqueensuniv:oai:https://qspace.library.queensu.ca:1974/7556 2024-06-02T08:15:57+00:00 Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) Wallace, Sarah Biology Friesen, Vicki L. 2012-09-28 14:02:24.007 application/pdf http://hdl.handle.net/1974/7556 eng eng Canadian theses http://hdl.handle.net/1974/7556 This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. seabird Baja California gene flow conservation Cassin's auklet population genetic structure thesis 2012 ftqueensuniv 2024-05-06T10:47:32Z Thesis (Master, Biology) -- Queen's University, 2012-09-28 14:02:24.007 Characterizing the population genetic structure of a species can provide insight into isolating effects of local adaptation and genetic drift, and homogenizing effects of gene flow. The relative interplay between gene flow and genetic drift can indicate whether multiple conservation units are needed to preserve biodiversity. Baja California, Mexico is a biodiversity hotspot where many individuals are genetically differentiated from conspecific individuals breeding elsewhere. Cassin’s auklet (Ptychoramphus aleuticus), a zooplanktivorous seabird, breeds in colonies along the Pacific coast of North America. One subspecies, P. a. australe, is described from Baja California and another, P. a. aleuticus, is described from the rest of its range to the Aleutian Islands, Alaska. Many of the colonies throughout its range have been declining in numbers likely as a result of decreases in food availability in cold-water upwellings along the coast. The mitochondrial control region and eleven nuclear microsatellites were analyzed using programs based on coalescent and Bayesian theory to determine how the southern subspecies compares genetically to the main subspecies. First, population genetic structure was characterized throughout Cassin’s auklet’s breeding range using pairwise genetic differentiation indices, hierarchical analysis of variance, statistical parsimony and Bayesian clustering methods. The two subspecies were genetically differentiated but individuals breeding in the Channel Islands were more genetically similar to P. a. australe individuals. Population genetic differentiation was not evident within the two genetic groups. Second, gene flow between the two genetic groups was estimated using coalescent and Bayesian methods. Significant gene flow was estimated from the northern group (Aleutian Islands to Southeast Farallon Islands) into the southern group (Channel Islands to San Benito Island) but not from the southern group into the northern ... Thesis Alaska Aleutian Islands Queen's University, Ontario: QSpace Baja Pacific |
institution |
Open Polar |
collection |
Queen's University, Ontario: QSpace |
op_collection_id |
ftqueensuniv |
language |
English |
topic |
seabird Baja California gene flow conservation Cassin's auklet population genetic structure |
spellingShingle |
seabird Baja California gene flow conservation Cassin's auklet population genetic structure Wallace, Sarah Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) |
topic_facet |
seabird Baja California gene flow conservation Cassin's auklet population genetic structure |
description |
Thesis (Master, Biology) -- Queen's University, 2012-09-28 14:02:24.007 Characterizing the population genetic structure of a species can provide insight into isolating effects of local adaptation and genetic drift, and homogenizing effects of gene flow. The relative interplay between gene flow and genetic drift can indicate whether multiple conservation units are needed to preserve biodiversity. Baja California, Mexico is a biodiversity hotspot where many individuals are genetically differentiated from conspecific individuals breeding elsewhere. Cassin’s auklet (Ptychoramphus aleuticus), a zooplanktivorous seabird, breeds in colonies along the Pacific coast of North America. One subspecies, P. a. australe, is described from Baja California and another, P. a. aleuticus, is described from the rest of its range to the Aleutian Islands, Alaska. Many of the colonies throughout its range have been declining in numbers likely as a result of decreases in food availability in cold-water upwellings along the coast. The mitochondrial control region and eleven nuclear microsatellites were analyzed using programs based on coalescent and Bayesian theory to determine how the southern subspecies compares genetically to the main subspecies. First, population genetic structure was characterized throughout Cassin’s auklet’s breeding range using pairwise genetic differentiation indices, hierarchical analysis of variance, statistical parsimony and Bayesian clustering methods. The two subspecies were genetically differentiated but individuals breeding in the Channel Islands were more genetically similar to P. a. australe individuals. Population genetic differentiation was not evident within the two genetic groups. Second, gene flow between the two genetic groups was estimated using coalescent and Bayesian methods. Significant gene flow was estimated from the northern group (Aleutian Islands to Southeast Farallon Islands) into the southern group (Channel Islands to San Benito Island) but not from the southern group into the northern ... |
author2 |
Biology Friesen, Vicki L. |
format |
Thesis |
author |
Wallace, Sarah |
author_facet |
Wallace, Sarah |
author_sort |
Wallace, Sarah |
title |
Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) |
title_short |
Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) |
title_full |
Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) |
title_fullStr |
Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) |
title_full_unstemmed |
Testing the role of Baja California generating biodiversity: A test case characterizing the population genetic structure of Cassin's auklet (Ptychoramphus aleuticus) |
title_sort |
testing the role of baja california generating biodiversity: a test case characterizing the population genetic structure of cassin's auklet (ptychoramphus aleuticus) |
publishDate |
2012 |
url |
http://hdl.handle.net/1974/7556 |
geographic |
Baja Pacific |
geographic_facet |
Baja Pacific |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_relation |
Canadian theses http://hdl.handle.net/1974/7556 |
op_rights |
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
_version_ |
1800740281317851136 |