Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei)
Thesis (M.S.) University of Alaska Fairbanks, 2011 In this thesis I examine the population genetics of an endemic Beringian freshwater fish genus, Dallia (blackfish). The current distribution of blackfish was heavily influenced by paleoclimatic instability during the Pleistocene. Beringian paleoclim...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/11331 2023-05-15T15:42:38+02:00 Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) Campbell, Matthew A. López, J. Andrés Takebayashi, Naoki Olson, Matthew 2011-08 http://hdl.handle.net/11122/11331 en_US eng http://hdl.handle.net/11122/11331 Department of Biology and Wildlife Dallia Alaska genetics Dallia pectoralis Russia Siberia Russian Far East Saint Lawrence Island Thesis ms 2011 ftunivalaska 2023-02-23T21:37:40Z Thesis (M.S.) University of Alaska Fairbanks, 2011 In this thesis I examine the population genetics of an endemic Beringian freshwater fish genus, Dallia (blackfish). The current distribution of blackfish was heavily influenced by paleoclimatic instability during the Pleistocene. Beringian paleoclimatic changes during the Pleistocene included the fluctuating growth and decline of glaciers and an overall decrease in temperature and increased aridity in areas not adjacent to the Bering Sea. Pleistocene glacial advances resulted in the cyclical emergence of the Bering land bridge. The effects of paleoclimatic instability on blackfish distribution and abundance can be inferred through the distribution of genetic variation across the Beringian landscape. I address three basic questions: 1: Are separate populations of blackfish taxonomically distinct entities? I found that while there is clear genetic structuring and isolation, there is insufficient information to make a strong statement in this regard. 2: Did blackfish survive Pleistocene glaciations within multiple Beringian refugia? My results indicate that blackfish persisted in at least four broad geographic areas. 3: How did the Bering land bridge influence intercontinental aquatic interchange? My evidence points to close genetic relationships and potentially high exchange of blackfish across the Bering land bridge, which supports the Bering land bridge as conduit for freshwater aquatic migration. 1. Introduction -- Blackfish -- Scientific classification and relationships to other fishes -- History of blackfish in Beringia -- Thesis research and organization -- References -- 2. Mitochondrial phylogeography of a Beringian endemic: Dallia -- Abstract -- Introduction -- Materials and methods -- Results -- Discussion -- Acknowledgements -- References -- 3. Population genetics of Dallia in Beringia -- Abstract -- Background -- Methods -- Results -- Discussion -- Conclusions -- Authors' contributions -- Acknowledgements -- References -- 4. Conclusion. Thesis Bering Land Bridge Bering Sea Dallia pectoralis glaciers Alaska Beringia Siberia University of Alaska: ScholarWorks@UA Bering Sea Fairbanks Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Dallia Alaska genetics Dallia pectoralis Russia Siberia Russian Far East Saint Lawrence Island |
spellingShingle |
Dallia Alaska genetics Dallia pectoralis Russia Siberia Russian Far East Saint Lawrence Island Campbell, Matthew A. Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) |
topic_facet |
Dallia Alaska genetics Dallia pectoralis Russia Siberia Russian Far East Saint Lawrence Island |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2011 In this thesis I examine the population genetics of an endemic Beringian freshwater fish genus, Dallia (blackfish). The current distribution of blackfish was heavily influenced by paleoclimatic instability during the Pleistocene. Beringian paleoclimatic changes during the Pleistocene included the fluctuating growth and decline of glaciers and an overall decrease in temperature and increased aridity in areas not adjacent to the Bering Sea. Pleistocene glacial advances resulted in the cyclical emergence of the Bering land bridge. The effects of paleoclimatic instability on blackfish distribution and abundance can be inferred through the distribution of genetic variation across the Beringian landscape. I address three basic questions: 1: Are separate populations of blackfish taxonomically distinct entities? I found that while there is clear genetic structuring and isolation, there is insufficient information to make a strong statement in this regard. 2: Did blackfish survive Pleistocene glaciations within multiple Beringian refugia? My results indicate that blackfish persisted in at least four broad geographic areas. 3: How did the Bering land bridge influence intercontinental aquatic interchange? My evidence points to close genetic relationships and potentially high exchange of blackfish across the Bering land bridge, which supports the Bering land bridge as conduit for freshwater aquatic migration. 1. Introduction -- Blackfish -- Scientific classification and relationships to other fishes -- History of blackfish in Beringia -- Thesis research and organization -- References -- 2. Mitochondrial phylogeography of a Beringian endemic: Dallia -- Abstract -- Introduction -- Materials and methods -- Results -- Discussion -- Acknowledgements -- References -- 3. Population genetics of Dallia in Beringia -- Abstract -- Background -- Methods -- Results -- Discussion -- Conclusions -- Authors' contributions -- Acknowledgements -- References -- 4. Conclusion. |
author2 |
López, J. Andrés Takebayashi, Naoki Olson, Matthew |
format |
Thesis |
author |
Campbell, Matthew A. |
author_facet |
Campbell, Matthew A. |
author_sort |
Campbell, Matthew A. |
title |
Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) |
title_short |
Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) |
title_full |
Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) |
title_fullStr |
Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) |
title_full_unstemmed |
Phylogeography and population genetics of a Beringian endemic: Dallia (Esociformes: Teleostei) |
title_sort |
phylogeography and population genetics of a beringian endemic: dallia (esociformes: teleostei) |
publishDate |
2011 |
url |
http://hdl.handle.net/11122/11331 |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Bering Sea Fairbanks Lawrence Island |
geographic_facet |
Bering Sea Fairbanks Lawrence Island |
genre |
Bering Land Bridge Bering Sea Dallia pectoralis glaciers Alaska Beringia Siberia |
genre_facet |
Bering Land Bridge Bering Sea Dallia pectoralis glaciers Alaska Beringia Siberia |
op_relation |
http://hdl.handle.net/11122/11331 Department of Biology and Wildlife |
_version_ |
1766376591447818240 |