Inferring recent historic demographic events (bottlenecks) using genetic data, case study: North Atlantic blue whale (Balaenoptera musculus musculus)

Tom Oosting, Martine Bérubé, Andrea A. Cabrera, Richard Sears, Christian Ramp, Jooke Robbins, Gísli A Vikingsson, Nils Øien, Finn Larsen, Per Palsboll

Research output: Contribution to conferencePosterAcademic

Abstract

Signals of past demographic changes can be found within the genetic diversity of a population long after an event has occurred. However, modern genetics is not always able to detect past demographic changes. Sometimes, signals of demographic changes are lost over time, overshadowed by other events or statistical power is insufficient to discriminate between different events. In this study we looked at the genetic diversity of the North Atlantic blue whale (Balaenoptera musculus musculus). Blue whales were intensively hunted during the early 1900’s, subjecting the entire species to a bottleneck. We attempted to estimate the timing of this demographic event based upon the current genetic diversity of the population. Additionally, we estimated effective population sizes before and after whaling. Standard bottleneck tests such as the M-ratio test and the heterozygosity-excess were used to see whether a signal of the bottleneck could be detected. MSVAR was used to estimate the timing and the abundances before and after the demographic event based upon genetic data. Finally, BEAST was implemented to look at demographic changes over a longer period of time. Preliminary results suggest other demographic changes distort the signal of the recent bottleneck, shifting the timing of the demographic event
Original languageEnglish
Publication statusPublished - 20-Aug-2017
EventESEB 2017: 16th Congress of the European Society for Evolutionary Biology - Conference Centre MartiniPlaza, Groningen, Netherlands
Duration: 20-Aug-201725-Aug-2017
Conference number: 16
https://eseb.org/wp-content/uploads/2018/08/2017_Program_List-of-Posters.pdf

Conference

ConferenceESEB 2017
Abbreviated titleESEB XVI Congress
Country/TerritoryNetherlands
CityGroningen
Period20/08/201725/08/2017
Internet address

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