Tag Archives: migration

Clinal genomic variation in Drosophila species

Posted on 12 Nov, 2015 by Arun Sethuraman

Two recent manuscripts describe adaptive evolutions to clinal/latitudinal variations in Drosophila species to supplement a growing wealth of recent studies on geographic variation and adaptive evolution in natural populations of fruitflies (eg. see Kao et al. 2015, Zhao et al. … Continue reading →

Posted in adaptation, evolution, genomics, Molecular Ecology, the journal, natural history, population genetics | Tagged , , , , , | Leave a comment

On false positives in Isolation with Migration analyses

Posted on 19 Oct, 2015 by Arun Sethuraman

The IM suite of tools (IM, IMa, IMa2, IMa2p, etc.) are used widely by molecular ecologists at large for the analyses and estimation of ancestral demography under an Isolation with Migration (IM) model. However, these tools come with fundamental assumptions … Continue reading →

Posted in evolution, genomics, howto, IMa2, methods, Molecular Ecology views, natural history, population genetics, software, theory | Tagged , , , , , , , | 1 Comment

IMa2p – Parallel Isolation with Migration Analyses

Posted on 16 Jul, 2015 by Arun Sethuraman

I figured that it was time to write an update on my post from a year ago on Bayesian MCMC in inferring ancestral demography. Recently, my postdoctoral advisor, Jody Hey and I released a version of the popular IMa2 program, … Continue reading →

Posted in bioinformatics, genomics, howto, software, theory | Tagged , , , , , | 1 Comment

Gene flow and Population Fitness

Posted on 7 May, 2015 by Arun Sethuraman

Fitness effects of gene flow (both advantageous and deleterious) have garnered plenty of recent press and scientific exploration. At the population level, the concepts and consequences are notoriously familiar. In the context of immigration, they reduce to existing genetic variation, … Continue reading →

Posted in adaptation, evolution, genomics, natural history, population genetics, selection, speciation, theory | Tagged , , , , , | 1 Comment

Migration on the brain

Posted on 15 Apr, 2015 by Rob Denton

If you’ve watched any number of nature shows in your lifetime, you’ve seen the astounding migrations made by salmonid fishes. You can count on seeing a shot of salmon darting against the current and catapulting themselves over turbulent falls (like … Continue reading →

Posted in Molecular Ecology, the journal, natural history, RNAseq, transcriptomics | Tagged , | 2 Comments