Matt Cheng

When it’s time to go home but your code isn’t done running. #RStats

Hi Everyone, CAPAM’s special issue on Fisheries Stock Assessment Good Practices is finally completed. Direct link to the special issue is here sciencedirect.com/special-issue/… The preface that briefly describes the papers can be found at sciencedirect.com/science/articl…

A first for me - using PIT tags to track the movements of... plants. Downstream dispersal potential of knotweed. Lots of twitterless folks, including John Gunn and his postdoc Jessica Charpentier who led efforts, @MLCheng3. Support from @COLSA_UNH doi.org/10.1017/inp.20…

Post-doc opportunity! Interested in SDMs and bycatch genetic data? Stock-specific Modeling of Bering Sea Chum Salmon: Integrating fishery-dependent observations with genetic data Excellent team of @UAFcfos and @NOAAFisheries collaborators: @ja_langan @Wes_Larson1 & others

🐋 One or many? Exploring the population groups of Earth's largest animal: the Antarctic blue whale. 📉Hunted nearly to extinction in the 20th century, a new study by PhD student, Zoe Rand, looks into population groups, recovery, and conservation. 👉fish.uw.edu/2024/11/one-or…

Proudly announce our joined paper showing SNP panel development for Arctic Char, Brook Trout & Lake Whitefish important for Northern Indigenous communities in Canada, contributing significantly to food security, culture, tradition and economy📰twtr.to/IE_el #genomics

Ecotype diversity increased with lake depth and surface area in both Coregonus and Salvelinus - and diversity in Coregonus increased with latitude, while the number of ecotypes in Salvelinus assemblages was linked to climatic seasonality.  New paper:  doi.org/10.1111/fwb.14…

How do we address rapid changes in fleet structure within integrated stock assessments? When is it necessary to represent sex-structured dynamics? Matt Cheng used Alaska sablefish and simulations to address these questions. See his @UAFcfos PhD defense on Monday 10/21 @ 1pm AK

DHARMa v0.4.7 #rstats package for #glmm residual diagnostics now available on #CRAN. Among other things, this version includes a new residual test for #phylogenetic correlation, as well as support for the #phylolm package. Moreover, to make DHARMa more accessible for color-blind

Interested in what we can learn about the population and spatial dynamics of Alaskan forage fish by combining survey catches with seabird and groundfish diets? Check out Lindsay Turner's thesis defense on Fri, Oct. 18th @ 2pm Alaska

I've now shared the experience in a short article 😇 Had to fail to make it to Nature 🤣 My paper was proved wrong. After a sleepless night, here's what I did next nature.com/articles/d4158… Thank you so much to Jack Leeming Senior careers editor @Nature for his tremendous help 😉

@B3EcoGenetics Yup!

Check out this new paper in Freshwater Biology led by Kevin Fitzgerald! Here, we show how juvenile coho growth fluctuates interannually in response to changes in biennial pink salmon spawning abundance. Read more here: (onlinelibrary.wiley.com/doi/10.1111/fw…)

Interested in climate change impacts on lake ice & juvenile salmon? Catch my talk Monday morning (9:30) in the remote sensing for global change session. Excited to attend my first National @AmFisheriesSoc conference! 🐟 #afs154

Think Bayes on informative priors: "If you have to make life and death decisions, you should probably use all of the information at your disposal, rather than maintaining the illusion of objectivity by pretending to know less than you do." #informative-priors" target="_blank" rel="nofollow noopener">allendowney.github.io/ThinkBayes2/ch…

See our new paper on how to determine when you need to collect more data ... surprisingly, more data often has little value for decisions ... our paper unravels the mystery as to why "Value of Information Analyses" often yield surprising results doi.org/10.1111/2041-2…

very nicely written.

New Paper - @DavidRHeit's 2nd MS chapter is out! A review + mammal & bird case studies exploring nonlinearity in GLMs GLMs are "nonlinear" on the natural scale yet entail a linearity assumption, which can be confusing Read more (open access): onlinelibrary.wiley.com/doi/full/10.10…

@CurryCunningham What's going on with Egegik? Seems odd to have just as many 1.2's as there are 2.2's?

What's the deal with the age composition of #BristolBay salmon this year? More 1.2's than expected, and fewer 1.3's than expected, meaning lots of small fish! Bars in the figure are the age proportions from preseason forecast, diamonds are aggregate age comp from test fishery

Salmon numbers are occasionally spiking in the western Canadian Arctic. Researchers at CFOS and @FishOceansCAN have figured out why: Warmer Arctic ocean temps are creating new corridors for migration. Those conditions could become common by the 2040s. uaf.edu/news/open-gate…

spAbundance package (by @jeffdoser18 @ZipkinLab) is already published at @MethodsEcolEvol! It fits a wide variety of single/multispecies abundance models using MCMC and Bayesian Inference allowing also for hierarchical frameworks. Let me show you a funny example 🧵👇(1/6) #rstats