Glacial retreat during the Pleistocene revealed newly-usable habitats, allowing species colonization via founder events. This colonization is thought to be responsible for an evident loss in haplotype and nucleotide diversities in some terrestrial and estuarine species with increasing latitude. With the mid-shelf zone (30–200m) near shore along the Pacific coast of North America, due to a narrow and steep continental shelf, I looked to see if the loss of genetic diversity with increasing latitude extended to a middle-shelf flatfish, Pacific sanddab (Citharichthys sordidus). The mitochondrial DNA control region sequence from 130 Pacific sanddabs, taken from 4 locations, was compared utilizing all sequence differences and the transvertions only, due to high haplotype diversity. Overall significantly more differences, hence more diversity, were in the mismatch distribution in the lower latitudes. Additionally, compared to Dover sole, Pacific sanddab is more diverse, possibly due to older populations or less fishing pressure.
|Advisor:||Wilson, Raymond R., Jr.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 48/04M, Masters Abstracts International|
|Subjects:||Ecology, Genetics, Biological oceanography|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be