Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2019

Erindi/veggspjald / Talk/poster E4

Atlantic cod population split estimates: Inferrences made with whole genomes

Höfundar / Authors: Matthew S. Haynsen (1), Einar Árnason (1), Katrín Halldórsdóttir (1)

Starfsvettvangur / Affiliations: 1. Faculty of Life and Environmental Sciences, University of Iceland

Kynnir / Presenter: Matthew S. Haynsen

Atlantic cod, Gadus morhua, occurs on continental shelves and banks on both sides of the North Atlantic Ocean but has made multiple transarctic invasions of the Pacific Ocean, ~4 mya. Over the past 100,000 years, cod have experienced transatlantic vicariance during glacial cycles with accompanied population fluctuations associated with restrictions to and recoveries from glacial refugia.
Studies have found significant genetic differentiation of cod populations in the North Atlantic, particularly when compared longitudinally; however, the age and origin of these populations is unknown and could vary widely because of the glacial cycles of the North Atlantic. By inferring the demographic histories of cod populations from across the North Atlantic it may be possible to determine when populations split and the impact that glaciation had on population sizes.
Based on high coverage Atlantic cod genomes, we will infer both the ancestral effective population sizes and the time since the most recent common ancestor for populations found in Iceland, the North Sea, and eastern Canada (Newfoundland/Nova Scotia).