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Atal Saha

Postdoctoral Research Fellow

 
Office:
J2002A ( Universitetsveien 25, Kristiansand )

I am a Post-Doctoral Research Fellow in population genomics at Centre for Coastal Research (CCR), affiliated to the Department of Natural Sciences, University of Agder, Norway.

My current project is about evolutionary and ecological genomics of marine species in Norwegian coastal waters. My research activities primarily involve bioinformatic and statistical analyses of genomic data from NGS sequencing (e.g. ddRAD) coupled with environmental and biological data, for the study of marine ecology and evolution. 

Previously, I did a postdoc at Stockholm University (in the Division of Population Genetics) investigating genomic dynamics over space and time in salmonid (brown trout and Arctic char) metapopulations. My project was based on data from individual whole-genome sequencing and pool-sequencing of groups of individuals. In this work, we studied cryptic sympatry, genetic changes over time, local adaptation, hybridization and introgression in salmonids from mountain freshwater lake systems in Sweden.

In my PhD project, I investigated genetic population structure, cryptic speciation, hybridization and local adaptation, mainly in redfish (plus saithe and Greenland halibut) from the North Atlantic. Analysing data from microsatellite DNA and SNP markers, I found evidence of significant genetic population structure in beaked redfish, saithe and Greenland halibut. My data supported three novel cryptic species in golden redfish complex. A low but statistically significant extent of introgession was estimated in redfish. I also found an indication of local adaptation in groups of beaked redfish. I defended my PhD at University of Tromso and the project was coordinated by the Norwegian Institute of Marine Research (IMR). During my PhD period, I had a PhD internship at University of Washington. After completion of my PhD, I worked as a research assistant at IMR for a year.

As it is evident, my main research interest is to apply population genomic tools to support sustainable management and conservation of aquatic species.

Scientific publications

  • Saha, Atal; Kent, Matthew Peter; Hauser, Lorenz; Drinan, Daniel P.; Nielsen, Einar E.; Westgaard, Jon-Ivar; Lien, Sigbjørn; Johansen, Torild (2021). Hierarchical genetic structure in an evolving species complex: Insights from genome wide ddRAD data in Sebastes mentella. PLOS ONE. ISSN: 1932-6203. 16 (5). doi:10.1371/journal.pone.0251976.
  • Myksvoll, Mari Skuggedal; Devine, Jennifer Ann; Quintela, Maria; Geffen, Audrey J.; Nash, Richard David Marriott; Sandvik, Anne Dagrun; Besnier, Francois; Saha, Atal; Dahle, Geir; Jansson, Eeva; Nedreaas, Kjell Harald; Johansen, Torild (2021). Linking dispersal connectivity to population structure and management boundaries for saithe in the Northeast Atlantic. Marine Ecology Progress Series. ISSN: 0171-8630. 680s 177 - 191. doi:10.3354/meps13862.
  • Saha, Atal; Andersson, Anastasia; Kurland, Sara; Keehnen, Naomi L. P.; Kutschera, Verena E.; Hössjer, Ola; Ekman, Diana; Karlsson, Sten; Kardos, Marty; Ståhl, Gunnar; Allendorf, Fred W.; Ryman, Nils; Laikre, Linda (2021). Whole-genome resequencing confirms reproductive isolation between sympatric demes of brown trout (Salmo trutta) detected with allozymes. Molecular Ecology. ISSN: 0962-1083. doi:10.1111/mec.16252.
  • Saha, Atal; Hauser, Lorenz; Hedeholm, Rasmus; Planque, Benjamin; Fevolden, Svein-Erik; Boje, Jesper; Johansen, Torild (2017). Cryptic Sebastes norvegicus species in Greenland waters revealed by microsatellites. ICES Journal of Marine Science. ISSN: 1054-3139. 74 (8). s 2148 - 2158. doi:10.1093/icesjms/fsx039.
  • Westgaard, Jon-Ivar; Saha, Atal; Kent, Matthew Peter; Hansen, Hanne Hellerud; Knutsen, Halvor; Hauser, Lorenz; Cadrin, Steven X.; Albert, Ole Thomas; Johansen, Torild (2017). Genetic population structure in Greenland halibut (Reinhardtius hippoglossoides) and its relevance to fishery management. Canadian Journal of Fisheries and Aquatic Sciences. ISSN: 0706-652X. 74 (4). s 475 - 485. doi:10.1139/cjfas-2015-0430.
  • Saha, Atal; Johansen, Torild; Hedeholm, Rasmus; Nielsen, Einar Eg; Westgaard, Jon-Ivar; Hauser, Lorenz; Planque, Benjamin; Cadrin, Steven X.; Boje, Jesper (2017). Geographic extent of introgression in Sebastes mentella and its effect on genetic population structure. Evolutionary Applications. ISSN: 1752-4571. 10 (1). s 77 - 90. doi:10.1111/eva.12429.
  • Saha, Atal; Hauser, Lorenz; Kent, Matthew Peter; Planque, Benjamin; Neat, Francis; Kirubakaran, Tina Graceline; Huse, Irene; Homrum, Eydna; Fevolden, Svein-Erik; Lien, Sigbjørn; Johansen, Torild (2015). Seascape genetics of saithe (Pollachius virens) across the North Atlantic using single nucleotide polymorphisms. ICES Journal of Marine Science. ISSN: 1054-3139. 72 (9). s 2732 - 2741. doi:10.1093/icesjms/fsv139.

Last changed: 10.08.2022 15:08