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Alex Fraik

@akfraik.bsky.social
918 followers 597 following 96 posts

Research scientist | Evolution, pop gen & conservation genomics | views & typos are my own | 🐟🐺🧬

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Alex Fraik @akfraik.bsky.social · 28/09/2026
Very cool new study led by @craigdwells.bsky.social evaluating the role of structural variants in facilitating complex hybridization dymanics between native and introduced Rainbow Trout lineages and Westslope Cutthroat trout #consgen #fishgen
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Joachim Mergeay @jmergeay.bsky.social · 18/09/2026
Silent but dramatic loss of genetic diversity unveiled using museum specimens #consgen
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Dr. K. Lotterhos @drk-lo.bsky.social · 15/09/2026
I'm hiring a bioinformatician! Review of applications starts October 1 with a start date as soon as possible. 🧪 #Genomics #popGen #CompBio northeastern.wd1.myworkdayjobs.com/careers/job/...
northeastern.wd1.myworkdayjobs.com
Bioinformatician - Lotterhos Lab
About the Opportunity About the Center for Marine Ecological Genomics The successful candidate will be based at the Lotterhos Lab and the Center for Marine Ecological Genomics at Northeastern Marine S...
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Andrew Hendry @ecoevoevoeco.bsky.social · 16/09/2026
Maybe you have heard about our Alaska stickleback introduction experiment? You might want to apply for our multi-PI freshwater science postdoctoral position. The video below is of one of our source lakes for the intro. scasscsa.mcjobboard.net/jobs/235865
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Alex Fraik @akfraik.bsky.social · 13/09/2026
USFWS is hiring a permanent geneticist based at Auburn University at a fish technology center in GA! #consgen
usajobs.gov
Geneticist
You will serve as a Geneticist U.S. Fish and Wildlife Service, Warm Springs Fish Technology Center. You may be required to travel overnight away from home up to 5 nights per month. You must obtain a g...
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Alex Fraik @akfraik.bsky.social · 09/09/2026
Post doc position at Tennessee State University working with the USFS focused on developing/using metagenomics to address community and invasion ecology research questions. The posting closes on September 15. #consgen #edna
jobs.tnstate.edu
Post-Doctoral Research Associate (Molecular Approaches for Detection of Aquatic Invasive Species
The Wildlife Ecology Laboratory (WEL) at Tennessee State University (TSU) is seeking a post-doctoral research associate to utilize environmental DNA as an early screening tool for aquatic invasive spe...
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Alex Fraik @akfraik.bsky.social · 08/09/2026
Two years after dam removal, Chinook have already re-established in the upper Klamath! Incredible to see some of the early science coming out of the now largest dam removal in history. www.nature.com/articles/s41...
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Joachim Mergeay @jmergeay.bsky.social · 03/09/2026
We calculated the effective size of the Scandinavian wolf population every year since its founding from the entire pedigree. Why? Because we could. But also because this population is vulnerable, and policy keeps pushing for lower and lower conservation targets 1/ #consgen
nature.com
The effective size of the Scandinavian wolf population is too small for both short- and long-term conservation - Heredity
Heredity - The effective size of the Scandinavian wolf population is too small for both short- and long-term conservation
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Becky Taylor @beckystaylor.bsky.social · 01/09/2026
Been wondering how well runs of homozygosity can predict inbreeding depression? Read our new meta-analysis where we show a significant relationship between ROH and fitness across taxa #popgen #consgen: onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Runs of Homozygosity Predict Inbreeding Depression Across Taxa: A Systematic Review and Meta‐Analysis
Measuring inbreeding via runs of homozygosity (ROH) captures realized autozygosity and can infer inbreeding timing through ROH length. A growing body of literature links the proportion of the genome ....
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Joshua Weitz @joshuasweitz.bsky.social · 25/08/2026
Some relevant facts: 1. The White House FY 2027 budget proposal included a 43% cut to the NSF GRFP budget, so they have made it clear that prioritizing the development of America's next generation of scientific talent is not their priority. nsf-gov-resources.nsf.gov/files/FY-202...
NATIONAL SCIENCE FOUNDATION FELLOWSHIPS, SCHOLARSHIPS, AND POSTDOCTORAL PROGRAMS FY 2027 BUDGET REQUEST TO CONGRESS, includes a 43% cut to NSF GRFP program
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Ben Moran @ben-moran.bsky.social · 25/08/2026
Hybrid zones are increasingly common; to what extent are human impacts on the environment the cause? We used pop gen, water chemistry, GIS, and ecotoxicology to explore the causes of hybridization in swordtails. With @mollyschumer.bsky.social, now out in Current Biology! www.cell.com/current-biol...
cell.com
Increased rates of hybridization in swordtails are associated with water pollution
Anthropogenic disturbance can drive hybridization by altering pre-mating reproductive barriers. Moran et al. pair population genomic surveys with water chemistry and GIS data to show that human develo...
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Rob Denton @rddenton.bsky.social · 19/08/2026
[JOB!] I'm hiring for a really exciting postdoc position. A combination of breeding experiments, conservation genomics, and student mentorship. Room/board at the @amnh.org Southwestern Research Station each summer, 40 months of support, new science building at BSU. Share broadly! ad: bit.ly/4hKaUIL
A human hand holds a medium sized green frog with distinct gray spots and yellow eyes. This is a Chiricahua Leopard Frog, a threatened species native to the southwest US and Mexico.
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bioRxiv Ecology @biorxiv-ecology.bsky.social · 17/08/2026
Targeted hybridization capture enables comprehensive detection of freshwater bioassessment invertebrates from environmental DNA www.biorxiv.org/content/10.64898/20…
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Anonymous Potato @anonymouspotato.bsky.social · 05/08/2026
EcoEvoJobs 2026-27 just opened for business and we've already got 79 faculty / permanent jobs listed. Please repost! ecoevojobs.net
ecoevojobs.net
ecoevojobs.net 2026-27
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Birds of the World | The Cornell Lab @birdsoftheworld.bsky.social · 10/08/2026
The Cornell Lab invites applications for Edward W. Rose Postdoctoral Fellowships. These competitive awards support innovative, independent research by early-career scholars of exceptional promise. Two to four awards are made in each cycle. academicjobsonline.org/ajo/jobs/32334
academicjobsonline.org
Cornell University, Lab of Ornithology
Job #AJO32334, WDR-00059934 Rose Postdoctoral Associate, Cornell University, Ithaca NY, Cornell Lab of Ornithology, Lab of Ornithology, Cornell University, Ithaca, New York, US
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Michael Metzger @metzgerm.bsky.social · 23/06/2026
I am excited to present our newest report on a severe outbreak of transmissible cancer in clams in the Pacific Northwest, with a lot of unexpected twists. Led by Sydney Weinandt and Zach Child. www.pnas.org/doi/10.1073/pnas.2611852123 1/14
pnas.org
Atlantic to Pacific: Outbreak of bivalve transmissible neoplasia detected in hybridizing soft-shell clams and eDNA in Puget Sound | PNAS
Bivalve transmissible neoplasias (BTNs) are transmissible cancers that have arisen in multiple bivalve species, including Eastern soft-shell clam (...
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Alex Fraik @akfraik.bsky.social · 24/07/2026
The brown bullhead catfish's mealnoma is the first transmissible cancer identified in fish or in freshwater environment (only one of 4 known to date). How many more of these transmissible cancers are out there an undiscovered? #fishgen 🧬 Also, check out this great write in the @nytimes.com
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WGDip @wgdip.bsky.social · 24/07/2026
Thanks @luohaoxu.bsky.social for presenting at #WGDip’s science forum. Using snow carp as a model, he argued that chromosome fusions often initiate rediploidisation after autopolyploidy. Featuring a haplotype-resolved assembly with 443 chromosomes (20n!) & insights into polyploid sex determination.
Diagram summarising key elements of Professor Luohao’s talk that was based on his recent publication in Nature: "Chromosomal fusions trigger rediploidization of autopolyploid genomes". 


1. Trio Construction.  The parent–offspring trio of S. younghusbandi.
Autopolyploid genome assembly. 

2. Hi-C heatmap of S. younghusbandi, with homologous chromosomes involved in fusions placed at the end.

3. Unbalanced chromosome fusion. Showing fusion Chr19-Chr22, Chr15-Chr4, Chr16-Chr8, Chr23-Chr20, Chr11-Chr14 in S. younghusbandi.

4. Meiosis pairing. Fluorescence in situ hybridization of centromeres and telomeres on meiotic metaphase I chromosomes displaying examples of a bivalent ring, a bivalent chain and a tetravalent ring

5. Asynchronous rediploidization. Timeline demonstrating the gradual shift from a tetraploid state to a diploid state. The timeline shows a decrease from 4n=100 to 4n=90 over 30mya in S. younghusbandi.
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Alex Fraik @akfraik.bsky.social · 24/07/2026
Harris and colleagues combined #GTSeq & historic scales to show that adaptive, but not neutral, genetic variants associated with body size shift in hatchery Steelhead. The genotype-phenotype association persisted, but the magnitude of the differences in body sizes diminished over time #consgen
pubmed.ncbi.nlm.nih.gov
Temporal Comparison Reveals Weakened Genotype-Phenotype Association at a Major-Effect Locus in Dworshak National Fish Hatchery Steelhead - PubMed
Life history diversity in salmonids contributes to population resilience, yet the mechanisms driving contemporary life history change remain difficult to disentangle from demographic and environmental...
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Carl Zimmer @carlzimmer.com · 13/07/2026
"Under the rule, destroying an endangered species’ nest or habitat would no longer be considered illegal." nyti.ms/4hch5F3
nyti.ms
Trump, Ending Decades of Protection, Opens Wild Habitats to Drilling and Mining (Gift Article)
The rule change ends a safeguard that had been in place for 50 years and could hasten the demise of imperiled animals.
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Science Magazine @science.org · 07/05/2026
A large-scale analysis of wildfires in the Western United States shows that U.S. Forest Service fuel-reduction treatments not only curb fire spread and intensity, but also, for each dollar invested, generate more than three times the value in avoided damages. Learn more: scim.ag/4uAs5Qc
scim.ag
Wildfire damages and the cost-effective role of forest fuel treatments
Wildfires are among the most pressing environmental challenges of the 21st century, intensified by the accumulation of forest fuels after a century of fire suppression policies. Although fuel-reductio...
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Joachim Mergeay @jmergeay.bsky.social · 17/07/2026
Atlantic Salmon in Spain is on the verge of extinction, with only 106 specimens caught in Asturias and THREE in Cantabria.
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Alex Fraik @akfraik.bsky.social · 17/07/2026
New genetics study by O. Malley and colleagues in the Klamath River provides a critical genetic baseline for characterizing the response of O. mykiss to the removal of 4 dams! The Klamath River dam removal project is now the largest in the world #gtseq #consgen 🧬🐟
onlinelibrary.wiley.com
Characterizing the Distribution of <fc><fi>Oncorhynchus mykiss</fi></fc> Genetic Diversity in the Klamath River Basin Before Dam Removal
Genetic assessments serve as powerful tools to evaluate the effects of anthropogenic habitat fragmentation on natural populations. In the Klamath River Basin, construction of four dams from 1912 to 1...
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Alex Fraik @akfraik.bsky.social · 30/06/2026
Another fisheries genetics job working with the Northwest Indian Fisheries Comission! #consgen #fisheries #fishgen nwifc.org/fisheries-ge...
nwifc.org
Fisheries Geneticist - NWIFC | Northwest Indian Fisheries Commission
Download the full Fisheries Geneticist EXTERNAL Announcement (PDF) Position Overview: The Northwest Indian Fisheries Commission (NWIFC) is seeking a
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Craig Primmer @fishcongen.bsky.social · 29/06/2026
Thanks to a couple of recent Ws on the funding front, we have 3 open postdoc positions in Helsinki, Finland in the field of salmonid fish ecological and evolutionary genomics. DL 7.8. More details in advert: jobs.helsinki.fi/job/Helsinki...
Basic details of the amazing post doc positions on offer with amazing image of a large Teno River salmon in background
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Prosanta Chakrabarty @prosanta.bsky.social · 26/06/2026
Y'all - the Smithsonian is hiring three new curators - herpetology, ichthyology, and ornithology! Notably, this is a 2nd fish curator position - i.e., not the same as the one advertised last month. So if you applied for that one apply again. www.usajobs.gov/job/873849000
Curator of Vertebrates

Smithsonian’s National Museum of Natural History currently has openings for three early-career Research Curators in Vertebrate Zoology, one each from the disciplines of ornithology, herpetology and ichthyology. The Department of Vertebrate Zoology seeks candidates with demonstrated expertise in, and a commitment to, collections-based research centered on systematics and evolution of birds, reptiles, amphibians, and fishes. This includes the ability to pursue an original approach to systematics and comparative analyses using, for example, morphology, development, and/or molecular data, and showing evidence of broader impacts or applications in evolutionary biology and/or collections-based ecology, as demonstrated by a record of peer-reviewed publications.

Candidates must have demonstrated the ability to establish an externally funded research program and to contribute to the growth and curation of the collections. Research in the Department is supported by the Museum’s shared laboratories, including the Laboratory of Analytic Biology and the Scientific Imaging facility, among others. The Department’s scientific collections are the largest in the world for fishes, amphibians, and reptiles, and the third largest for birds.

These federal positions will be filled at the GS-12 level, with a starting salary of $102,415, and excellent benefits. The positions are permanent and require a one-year probationary period. 

The official announcement is posted on USAJOBS, where applications must be submitted.
https://www.usajobs.gov/job/873849000

Please be sure to read the announcement and instructions carefully, as the process of applying via USAJOBS is stringent and differs from applying for an academic position. This website offers helpful advice: https://serc.si.edu/careers/tips-applying-federal-jobs

Please contact the Search Committee Chair, Michael McGowen (mcgowenm@si.edu) or the Department Chair, Helen James (jamesh@si.edu) with any questions.
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Carl Zimmer @carlzimmer.com · 25/06/2026
The US government is entering a partnership to store frozen cells and other biological samples from endangered and threatened species with Colossal, a private company best known for claiming to "de-extinct" dire wolves. Story by me & @catrineinhorn.bsky.social Gift link: nyti.ms/43Rzhfw
nyti.ms
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Alex Fraik @akfraik.bsky.social · 25/06/2026
NOAA Fisheries JOB ALERTS @ nwfsc! 2 positions for quantitative eDNA modeling www.usajobs.gov/GetJob/ViewD... www.usajobs.gov/GetJob/ViewD... 1 to facilitate lab management and national 'omics initiatives www.usajobs.gov/GetJob/ViewD... #fishgen #consgen #edna
usajobs.gov
Biologist (Omics)
This position is located in the National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS). Vacancies may be available in each listed location. Additional duty lo...
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Alex Fraik @akfraik.bsky.social · 23/06/2026
State of California is hiring for a fisheries geneticist! #consgen #fishgen www.conservationjobboard.com/job-listing-...
conservationjobboard.com
Senior Molecular Ecologist | West Sacramento, CA
Jun 17 - California Department of Water Resources hiring Senior Molecular Ecologist in West Sacramento, California on Conservation Job Board. Discover the latest conservation jobs and internships
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Alex Fraik @akfraik.bsky.social · 21/06/2026
Neat postdoc with @wilderness.org doing individual based movement models for caribou!
thewildernesssociety.careers.hibob.com
Careers
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Alex Fraik @akfraik.bsky.social · 08/06/2026
Some federal positions coming back online, Smithsonian is hiring for a "supervisory biologist" curator!
usajobs.gov
Supervisory Biologist
The Smithsonian Institution is the worlds largest museum, education, and research complex, with 21 museums and the National Zoo. This position is located in This position is located in Smithsonian's N...
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Alex Fraik @akfraik.bsky.social · 08/06/2026
This is a neat resource for prospective students looking for Eco/Evo opportunities and PIs looking to recruit!
docs.google.com
Ecology/Evolution/Marine Biology labs recruiting for Fall 2027 (Responses)
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Joanna Masel @joannamasel.bsky.social · 03/06/2026
Our new paper doi.org/10.1098/rspb... on long-term genetic threats to small populations finds that "mutational meltdown" (bad mutations fixing) is less of a problem than "mutational drought" (too few good new mutations) @wmawass.bsky.social @uliseshmc.bsky.social @jeremyjberg.bsky.social 1/5
doi.org
Extinction vortices are driven more by a shortage of beneficial mutations than by deleterious mutation accumulation
Abstract. Habitat loss contributes to extinction risk in multiple ways. Genetically, small populations can face an ‘extinction vortex’—a positive feedback
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Laura Bertola @lauradbertola.bsky.social · 23/05/2026
Lag in Effective Population Size Decline Amid Demographic Collapse: A Case Study of the Delta Smelt (Hypomesus transpacificus) onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
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Paige Byerly, PhD @paigebyerly.bsky.social · 19/05/2026
Excited to have our new garden dormouse paper out! Small mammals are underrepresented in conservation research. Here we explore patterns of genetic erosion in garden dormice, considered the fastest-declining mammal in Europe, in its core German range #consgen link.springer.com/article/10.1...
link.springer.com
Genomic signatures of population isolation in an endangered European rodent - BMC Genomics
Background The garden dormouse (Eliomys quercinus) is one of the fastest-declining mammals in Europe, and action is needed to prevent further population losses. The primary causes of declines are not ...
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Ana Ramón-Laca @lacadna.bsky.social · 13/05/2026
🐟 monitoring can be non-invasive. 🐟💧 = eDNA + eRNA Check out this comprehensive perspective article on how eNA can improve fisheries monitoring without harming the fish! The aim is to move beyond species detection, from estimating abundance to capturing reproductive status and lots in between.
doi.org
Prospects of multipurpose biomonitoring for fisheries assessment based on environmental nucleic acids
Methods using environmental nucleic acids have become highly effective for monitoring aquatic biodiversity, with an array of suitable use cases, including metrics for fisheries assessment. Traditiona...
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Alex Fraik @akfraik.bsky.social · 20/05/2026
Another fisheries #consgen job alert! The Northern Gulf Institute at Mississippi State University is seeking a Postdoctoral Associate to lead the development and application of molecular assays to support fisheries and biodiversity monitoring #eDNA
explore.msujobs.msstate.edu
Careers | MSU Jobs
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Alex Fraik @akfraik.bsky.social · 14/05/2026
The US Forest Service National Genomics Center is hiring an eDNA lab technician! Come work with us on cool genetics projects in Missoula #ConsGen #eDNA
paycomonline.net
Environmental DNA Lab Technician
...
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Anne Hilborn @annewhilborn.bsky.social · 19/04/2026
Permanent job in Sacramento! Sr environmental scientist in a good unit. Manage acoustic data, implement automated approaches for aggregating and summarizing wildlife data, carry out advanced quantitative analyses that integrate multiple data sources. calcareers.ca.gov/CalHrPublic/...
Department of Fish and Wildlife

JC-515381  -  Senior Environmental Scientist Specialist
SENIOR ENVIRONMENTAL SCIENTIST (SPECIALIST) 
$7,820.00 - $10,732.00 per Month
New to State candidates will be hired into the minimum salary of the classification or minimum of alternate range when applicable.

Final Filing Date: 5/5/2026
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Jazlyn Mooney @jazlynmooney.bsky.social · 21/04/2026
I am hiring a popgen postdoc! Looking for a creative scientist to join us at USC to investigate recessive variation and complex traits in model or non-model species. The project is funded by a multi-year NIH grant, contract can be renewed. Job add & details 👇🏽 usccareers.usc.edu/job/los-ange...
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Alex Fraik @akfraik.bsky.social · 06/04/2026
MT Field Tech alert! Come work on a project looking at co-evolution of Tailed Frogs and Cutthroat Trout in Montana in response to climate change #consgen #fieldbiology
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Alex Fraik @akfraik.bsky.social · 17/03/2026
Looking forward to reading this 👀 #consgen
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Marty Kardos @martykardos.bsky.social · 16/03/2026
Very cool work based on an amazing long term study of bighorn sheep: No Pedigree, No Problem: Genomic Inbreeding Tracks Genetic Rescue With High Resolution - Mitchell et al: onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
No Pedigree, No Problem: Genomic Inbreeding Tracks Genetic Rescue With High Resolution
With increasing habitat fragmentation and population isolation, inbreeding becomes a pressing concern for the persistence of wildlife populations. Detailed inbreeding monitoring is crucial for assess...
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Alex Fraik @akfraik.bsky.social · 16/03/2026
New advancements for plexing in #gtseq with PlexSeq! Neat case study from Matt Campbell and the Eagle Genetics Lab team for PBT and grandparentage analyses in Chinook Salmon in the Snake River #consgen link.springer.com/article/10.1...
link.springer.com
Development of a powerful PlexSeq™ SNP panel for grandparentage studies for snake river fall Chinook salmon - Conservation Genetics Resources
Interactions between hatchery-origin fish and wild populations of salmonids raise concerns about genetic diversity, productivity, and ecological integrity. Monitoring hatchery-origin reproduction in n...
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Anna Brüniche-Olsen @annabruniche.bsky.social · 06/03/2026
Escaping bottlenecks: The demographic path to genetic recovery in koalas (Phascolarctos cinereus) 🐨 🧬 #consgen #popgen
science.org
Escaping bottlenecks: The demographic path to genetic recovery in koalas (Phascolarctos cinereus)
Population bottlenecks can lead to evolutionary dead ends by eroding genetic diversity and intensifying inbreeding. Although theory predicts possible escape routes, direct observations of this process...
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Joachim Mergeay @jmergeay.bsky.social · 13/02/2026
Conservation genomics and assisted introgression is saving the American chestnut from extermination by invasive non-native pathogens. #consgen
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Alex Fraik @akfraik.bsky.social · 13/02/2026
Anyone out there know of anyone using or developing #gtseq to genotype Brown Trout? #consgen #fishgen #fisheries
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Alex Fraik @akfraik.bsky.social · 12/02/2026
AmpliRAD: A New Method Combining Amplicon and RAD Sequencing - Thompson - 2026 - Ecology and Evolution - Wiley Online Library onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
AmpliRAD: A New Method Combining Amplicon and RAD Sequencing
We present AmpliRAD, a novel sequencing method that integrates a multiplex PCR step into traditional RAD-seq protocols to enable the simultaneous generation of genome-wide SNP data and targeted genot...
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Jeffrey Ross-Ibarra @jrossibarra.bsky.social · 09/02/2026
Fun news! @gcbias.bsky.social and I are teaching a 2-week online population genetics workshop this summer to raise money for the Center for Population Biology at UC Davis. We're trying to gauge interest -- please fill this out if you might be interested! And please share broadly!
docs.google.com
Davis Summer Population Genomics Program
Want to learn population genetics? Please fill out this form to indicate your potential interest in a 2-week intensive online summer population genetics course taught by Jeffrey Ross-Ibarra and Graham...
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Kiva Oken @kivaoken.bsky.social · 21/01/2026
📣Job alert!📣 Working as a federal scientist is complicated right now, but we are actually hiring. One *permanent* stock assessment position on my team at NOAA NWFSC will open for 7 days in early-mid Feb. Will be a shared ad across several science centers. Get those usajobs resumes polished...
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