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Peter N. Dudley

@conservation.bio
2.3K followers 489 following 233 posts

Conservation biologists and researcher at UCSC and NOAA. Working on salmon and sturgeon. Simulations, statistical models, and non-invasive sampling. www.conservation.bio

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Peter N. Dudley @conservation.bio · 16/09/2026
#1 in the US baby!
Ucsc ranked first in us for marine a freshwater bio by us news and world report
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Peter N. Dudley @conservation.bio · 12/07/2026
🥳🎊
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Peter N. Dudley @conservation.bio · 11/07/2026
If your University's business cards suck, you can design your own. No one can stop you.
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Peter N. Dudley @conservation.bio · 11/07/2026
Sent off the #NACCR2026 poster for printing. Come by if you have suggestions about linking models together in a user friendly way.
A science poster in the better poster format.
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Peter N. Dudley @conservation.bio · 11/06/2026
I don't have any good ones. Here's my best.
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Peter N. Dudley @conservation.bio · 04/06/2026
I found some cool coasters in our office supplies cabinate.
A can of coke on a jaz drive
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Peter N. Dudley @conservation.bio · 25/03/2026
disabling the use of my code to train an ai model
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Peter N. Dudley @conservation.bio · 02/03/2026
New green #sturgeon open access article published. We look at potential spawning cyclic dominance as we investigate some aspects of our survey methods. 🧪🌎 doi.org/10.1002/aqc....
a multi panel figure showing pictures of green sturgeon under water and the video rig used to capture them. A graph of average spawning run sized of different years if divided into 4-year groups. Most are ~1500 fish while the one starting in 2010 is ~2200 fish.
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Peter N. Dudley @conservation.bio · 04/02/2026
Just finished one of the best books I've read in a while. Highly recommend. All the more interesting given it's pre-COVID
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Peter N. Dudley @conservation.bio · 27/01/2026
Does anyone still use VisTrails or Kepler for scientific modeling workflows? Have those been eclipsed with something else? 🧪
Kepler logo
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Peter N. Dudley @conservation.bio · 12/01/2026
Just a reminder. tidyverse.org/blog/2017/12...
It says

If the first line of your R script is

setwd("C:\Users\jenny\path\that\only\I\have")

I will come into your office and SET YOUR COMPUTER ON FIRE 🔥.
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Peter N. Dudley @conservation.bio · 12/01/2026
Played my first game of Finspan. The mechanics are a bit more fun than Wingspan, but, like Wingspan, it lacks any significant players interaction.
The board game Finspan A cute big eared dog next to Finspan board
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Peter N. Dudley @conservation.bio · 12/12/2025
The 🐀 has found the 🐦 feeder
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Peter N. Dudley @conservation.bio · 05/12/2025
Some redwood regrowth post the CZU fire. Always look so funny to me.
Fuzzy tall trees
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Peter N. Dudley @conservation.bio · 20/11/2025
I will hit up arrow in a terminal like 20 times rather than type in a 5 letter command.
The pig from toy story changing channels
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Peter N. Dudley @conservation.bio · 18/11/2025
Just stopped by to post this
a temperature legend where colder is red and warmer is blue
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Peter N. Dudley @conservation.bio · 03/11/2025
"The only efficient use of generative "AI" I see is helping to meet basic and excessive administrative burdens (e.g. filing unimportant progress reports). Maybe we should just reduce those rather than invest in a technology that can write a C+ essay."
the text form the post in a UCSC AI comment form
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Peter N. Dudley @conservation.bio · 31/10/2025
Look at him go!
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Peter N. Dudley @conservation.bio · 31/10/2025
🚨Great #Dog available around Santa Cruz, CA🚨 Meet Ducky our foster pup! He is ~7 years old and weighs 17 lb. He is a Goldilocks dog. Cuddely but not clingy. Food motivated but not obessed. Good energy but not high maintance. Good with people & dogs. Barks like a 🦆 Please repost! bit.ly/4hEKaar
A really cute shaggy dog!!!A cute pup sleeping.
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Peter N. Dudley @conservation.bio · 31/10/2025
Doing multiple surveys each year lets us see how #Sturgeon habitat use changes during the season. Check out this location in June vs July. Each small dark hump is a sonar shadow created by a sturgeon. 🧪🌎
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Peter N. Dudley @conservation.bio · 15/10/2025
Next time a student asks, "Why do we need to learn statistics?" Just put this up and sit down silently.
An article about how a hole in a side walk that looks like a rat was not made by a rat based on statistical analysis... I guess.
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Peter N. Dudley @conservation.bio · 27/09/2025
The two button meme with furrr deciding to make code faster or slower.
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Peter N. Dudley @conservation.bio · 12/09/2025
Green sturgeon survey shirts arrived. Made them a hex sticker. #sturgeon
A shirt with a hex-sticker design that says "survey" with a green sturgeon cartoon.
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Peter N. Dudley @conservation.bio · 29/08/2025
theme_classic() is so last season. We're doing theme_minimial() now.
A plot using ggplot theme_minimial()
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Peter N. Dudley @conservation.bio · 17/08/2025
Visiting my parents after #ESA2025 and my dad said he put my poster the "the other one." My parents still have my [bad] poster from #ESA2013!!!
A poster with way too much text on it and a bad use of color.
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Peter N. Dudley @conservation.bio · 16/08/2025
Cool, I'll check it out. These are more of a field guide (like species id) with a much larger ecology and history section in the front then other guides. Also, it is really beautifully illustrated.
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Peter N. Dudley @conservation.bio · 15/08/2025
Late breaking posters session at #ESA2025 was really uplifting! Science in the USA is in a dark place, but there are so many young, briliant researchers with great ideas, and people and organizations moving science forward. They'll set us back, they'll hurt many scientists, but they won't stop us.
"Keep" and "fighting" tacked on a cork board
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Peter N. Dudley @conservation.bio · 13/08/2025
As a 🇨🇦 I feel like I should be offended by this.
A book with the title "American review of Canadian studies"
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Peter N. Dudley @conservation.bio · 13/08/2025
Can we stop with the private citizens should kill invasive species. I've heard it multiple times at #ESA2025. It usually doesn't work and gives people a false view of the issue. This goes for the eating thing too. Look at striped bass in CA to see how that worked.
A spotted lantern-fly
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Peter N. Dudley @conservation.bio · 13/08/2025
Big believer that posters are better than talks at conferences. After presentating my first #BetterPoster at #ESA2025, that has only been reinforced.
My betterposter from ESA
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Peter N. Dudley @conservation.bio · 10/08/2025
Schedule all set for #ESA2025!
A long picture of a conference schedule
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Peter N. Dudley @conservation.bio · 01/08/2025
The easter egg in my #ESA2025 poster is little fish angels on my fish tombstone.
image of a tombstone with 2 fish angels on it.
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Peter N. Dudley @conservation.bio · 31/07/2025
If you haven't seen the #betterposter videos, you should check them out. 1) youtu.be/1RwJbhkCA58?... 2) youtu.be/SYk29tnxASs?...
The classic example #betterposter image
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Peter N. Dudley @conservation.bio · 13/06/2025
There are many optimization plots in ecology, but cost or transport is my favorite. I just like the shape. #fish
A plot where one decreasing trend and on increasing trend add together to mape a trend with a minima.
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Peter N. Dudley @conservation.bio · 07/06/2025
The Ace Hardware in Red Bluff, CA still has free 🍿. I may need to do boat repairs more often.
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Peter N. Dudley @conservation.bio · 06/06/2025
This is Red Bluff Diversion Dam. The gates are permanently up to help fish, including sturgeon. Seeing this reminds me that change is possible.
A dam with all barriers raised above river level
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Peter N. Dudley @conservation.bio · 06/06/2025
All in all, I always think I have a pretty great job this time of year.
A small research boat beached on a beatful part of a river.
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Peter N. Dudley @conservation.bio · 06/06/2025
The cup holder is deterioration rapidly
An improvised cup holder screwed to a wall that is cracking
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Peter N. Dudley @conservation.bio · 06/06/2025
I had 2 rocks team up to get stuck in the jet drive.
The exit of a jet drive with two rocks layering together to jam it
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Peter N. Dudley @conservation.bio · 06/06/2025
We saw our first tire. Dumped in front of the Red Bluff boat ramp.
A grainy image of what looks like a Cheeiro
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Peter N. Dudley @conservation.bio · 06/06/2025
The 2025 green #sturgeon survey is off to a good start. We are seeing a good number of sturgeon on the side-scan sonar. Every blob you see is a sturgeon. Other, less important, updates in this thread.
A grainy image with some blob shapes with shadows
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Peter N. Dudley @conservation.bio · 06/06/2025
If you are ever in a conversation with someone and they use the term "Bayesian prior" and are not actually talking about a statistical analysis, walk away.
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Peter N. Dudley @conservation.bio · 31/05/2025
We just released a new version of FHAST (2.2) (conservation.bio/fhast). This adds the ability to compare river restoration effects between two plans and bulk reprojection of GIS input files. #salmon #sturgeon 🧪🌎
The logo for the FHAST software. It is a bw river with the word FHAST on it.
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Peter N. Dudley @conservation.bio · 29/05/2025
Saw snow plant for the first time in Kings Canyon NP. Very cool plant that has a mutualistic relationship with a parasitic fungus.
Red spherical structures comming out of the earthA winding red plant A person looks at a red plant
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Peter N. Dudley @conservation.bio · 16/05/2025
I learned today that you can just pull pyqgis processing commands from the history in #QGIS spatialthoughts.com/2022/07/30/q...
Thr command you click on in qgis to get the process history
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Peter N. Dudley @conservation.bio · 14/05/2025
🧪🌎There is a new version of our fish habitat restoration assessment tool (FHAST) up in beta. You can check it out and all the training material at conservation.bio\fhast
A logo that says FHAST. It kind of looks like a river.
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Peter N. Dudley @conservation.bio · 13/05/2025
I'm debugging a new version of my restoration software, so making inputs that will intentionally trigger errors. Still, every time that error message pops up, I panic a little 😬. Conservation.bio\fhast
A computer error message box
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Peter N. Dudley @conservation.bio · 09/05/2025
I'm so close to not having the top article on my google scholar profile being from my previous research career!
One citation about engineering has 38 citations just above one about biology with 36 citations.
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Peter N. Dudley @conservation.bio · 08/05/2025
Just learned about the Palomino Trout on the USFWS Fish of the Week podacst. Really cool looking fish with an odd history! podcasts.apple.com/us/podcast/c...
a bright yellow trout with red side markings and red marks on the gills
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Peter N. Dudley @conservation.bio · 26/04/2025
It's #sturgeonsaturday 🌎 🧪 Anadromous fish sometimes have spawning cohorts that are larger than others (eg. odd vs even year pink salmon). It appears southern green sturgeon do as well. With 4 cohorts, the one which spawned in 2010, 2014, ... is by far the largest.
Graph of spawners per year in each cohort vs. a year when each cohort spawned. The one who spawned in 2010 is 1.7 times as large as the next closest.
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