Presentation Title

Genetic variation within the Lake Baikal endemic sculpin genus Limnocottus

Faculty Mentor

Dr. Andres Aguilar

Start Date

18-11-2017 12:30 PM

End Date

18-11-2017 1:30 PM

Location

BSC-Ursa Minor 67

Session

Poster 2

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

The Lake Baikal freshwater sculpin adaptive radiation is interesting because it contains approximately 33 species which live in both shallow and deep lake environments. One genus of Lake Baikal sculpin that we are studying is Limnocottus. We are interested in determining if recognized species are correctly distinguished using genetics and if there is evidence for hybridization among different species of Limnocottus. Additionally, we want to see if there are any genetic differences within species from various parts of Lake Baikal. This study was done by sequencing the mitochondrial cytochrome b gene from 84 fish and genotyping single nucleotide polymorphisms (SNPs) from ultaconserved elements (UCEs) from 48 fish. Phylogenetic analysis of the mitochondrial sequences was able to delineate all species and potentially found a new cryptic lineage. UCE data also recovered the same species and found limited evidence for hybridization in our sample. Both datasets revealed no population structure within Lake Baikal for any species of Limnocottus. These data suggest a recent divergence among three species of Limnocottus during the adaptive colonization of Lake Baikal.

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Nov 18th, 12:30 PM Nov 18th, 1:30 PM

Genetic variation within the Lake Baikal endemic sculpin genus Limnocottus

BSC-Ursa Minor 67

The Lake Baikal freshwater sculpin adaptive radiation is interesting because it contains approximately 33 species which live in both shallow and deep lake environments. One genus of Lake Baikal sculpin that we are studying is Limnocottus. We are interested in determining if recognized species are correctly distinguished using genetics and if there is evidence for hybridization among different species of Limnocottus. Additionally, we want to see if there are any genetic differences within species from various parts of Lake Baikal. This study was done by sequencing the mitochondrial cytochrome b gene from 84 fish and genotyping single nucleotide polymorphisms (SNPs) from ultaconserved elements (UCEs) from 48 fish. Phylogenetic analysis of the mitochondrial sequences was able to delineate all species and potentially found a new cryptic lineage. UCE data also recovered the same species and found limited evidence for hybridization in our sample. Both datasets revealed no population structure within Lake Baikal for any species of Limnocottus. These data suggest a recent divergence among three species of Limnocottus during the adaptive colonization of Lake Baikal.