Measurement of population structure of cod (Gadus morhua) in NAFO Subdivision 3Ps off southern Newfoundland by means of next-generation sequencing and genomic analysis

dc.contributor.advisorPavey, Scott
dc.contributor.advisorD’Aloia, Cassidy
dc.contributor.authorBabaei, Sarah
dc.date.accessioned2024-05-30T13:58:17Z
dc.date.available2024-05-30T13:58:17Z
dc.date.issued2024-03
dc.description.abstractOnce Canada’s biggest fishery, Atlantic Cod (Gadus morhua) stocks in the Northwest Atlantic collapsed in the 1990s, with recovery strategies proving unsuccessful. I focus on NAFO subdivision 3Ps off Newfoundland’s south coast. Tagging and genetic studies suggest 3Ps is a mixed stock of unknown composition. Greater power is required to see how 3Ps cod fits within Northwest Atlantic cod, which we address using Single Nucleotide Polymorphisms (SNPs). I compared 238 fish in 3Ps to three genetic clusters (Northern (NAFO 2J3KL), Saint Lawrence (NAFO 4SRT), Southern populations (NAFO 4X, 5YZ)) at 25,458 neutral SNPs. Supergene allele frequencies in juveniles and adults were also compared. I provide evidence for genetic similarity between 3Ps and Northern cod and evidence of two potential Northern cod subpopulations. Lastly, I observed decreasing supergene allele frequencies as 3Ps cod age. For species like cod with complex population structure, genomics helps understand population structure to inform recovery strategies.
dc.description.copyright©Sarah Babaei, 2024
dc.format.extentxi, 129
dc.format.mediumelectronic
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/37861
dc.language.isoen
dc.publisherUniversity of New Brunswick
dc.relationNatural Sciences and Engineering Research Council of Canada (NSERC)
dc.relationUniversity of New Brunswick
dc.relationThe Canada Research Chairs (CRC)
dc.relationFisheries and Oceans Canada
dc.relationNew Brunswick Innovation Foundation
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.disciplineBiology
dc.titleMeasurement of population structure of cod (Gadus morhua) in NAFO Subdivision 3Ps off southern Newfoundland by means of next-generation sequencing and genomic analysis
dc.typemaster thesis
oaire.license.conditionother
thesis.degree.disciplineBiology
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelmasters
thesis.degree.nameM.Sc.

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