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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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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 20/08/2026
Been working on an applied probability project, transforming a continuous function on the reals to probability of discrete state. And the function that solves all the desiderata is the Gibbs-Boltzmann distribution. I hate physics. It should be less useful.
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Dr. Aaron Thierry @thierryaaron.bsky.social · 10/08/2026
European summers aren't what they used to be! Grey curve is the climate of 1950-90. Every coloured line is a summer since 1991. Every one since 2005 sits beyond the 95th percentile of the curve. This isn't a shifting #climate. It's already a new one! 🤯🥵 Plot inspired by Barriopedro et al. 2011
Distribution of European summer temperature anomalies, June to August, over 25°W-40°E, 35-70°N, land only, the region used by Barriopedro et al., relative to 1961-1990, from ERA5. Grey bars show the 41 summers from 1950 to 1990, with a normal curve fitted through them, centred near zero. Coloured vertical lines show every summer from 1991 to 2025, shaded yellow through dark red by year, and almost all of them fall to the right of the grey distribution. The ten warmest are labelled, with 2024 furthest right at 2.74°C and 2022 next at 2.54°C. A dotted line marks the 95th percentile of the 1950-1990 distribution at 0.76°C.

Both run long, which is fine, since alt text has no practical limit and screen reader users benefit from the detail.
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Serhii Nazarovets @serhiinazarovets.bsky.social · 12/06/2026
A new preprint introduces SI-hacking: when guest editors publish excessively in their own special issues. More than 1,000 editors SI-hacked special issues are published each year. According to the authors, #MDPI accounts for 85% of them and #Frontiers for another 13%. arxiv.org/abs/2601.07563
A new preprint introduces SI-hacking (Special Issue hacking): when guest editors turn a special issue into a publication venue for themselves. 

:oa: https://arxiv.org/abs/2601.07563
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Marcelo Lima @marcelocegonha.bsky.social · 09/08/2026
Costa Rica has approved a law requiring wildlife crossings in public road infrastructure where ecological connectivity is affected—bringing connectivity conservation directly into infrastructure planning and policy. delfino.cr/2026/08/asam... @fletcherecology.bsky.social
delfino.cr
Asamblea aprueba ley que obliga a incluir pasos de fauna en la infraestructura pública del país
Iniciativa aprobada por unanimidad indica que MOPT, municipalidades y otras entidades públicas deberán coordinar con el Sinac para estudiar la necesidad o no de estas estructuras en nuevas obras viale...
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Stelios Katsanevakis @skatsanevakis.bsky.social · 09/08/2026
🌊 New paper in Functional Ecology: #ClimateChange is projected to favour smaller, shorter-lived, earlier-maturing and faster-growing reef #fish in the NE #Mediterranean, with increasing functional homogenization. doi.org/10.1111/1365... #MarineEcology #traits 🧪🌐🌍
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Noah Greifer @noahgreifer.bsky.social · 03/08/2026
I'm so happy to announce version 2.0.0 of my #Rstats package WeightIt is out on CRAN! New features: censoring weights, multilevel propensity scores, improved weights for continuous treatments, bias-reduced ordinal and multinomial models, M-estimation in subgroups Check out the website below!
ngreifer.github.io
Weighting for Covariate Balance in Observational Studies
Generates balancing weights for causal effect estimation in observational studies with binary, multi-category, or continuous point or longitudinal treatments by easing and extending the functionality ...
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Carl T. Bergstrom @carlbergstrom.com · 25/07/2026
More on the Trump / Kratsios "Golden Age of Science" report, from @theverge.com
theverge.com
The tech-broification of American science has officially begun
Trump’s ‘Golden Age’ of American science starts with dismantling it, while funneling billions into AI. 
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Meade Krosby @meadekrosby.bsky.social · 15/07/2026
This is one of those videos that reminds me of that tweet: “Climate change will manifest as a series of disasters viewed through phones with footage that gets closer and closer to where you live until you're the one filming it.”
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cara giaimo @cjgiaimo.bsky.social · 14/07/2026
i love when a press release headline sounds like it was written by an aggrieved fish
a headline from the Society for Experimental Biology reads "Think that fishes and amphibians don't have necks? Think again"
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Peter N. Dudley @conservation.bio · 14/07/2026
At a brewery. It's trivia night. The question was "what z word is the term for a fertilized egg?" Guy down the bar says "zembryo"
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Sophia Winkler-Schor, PhD @scientistsophia.bsky.social · 13/07/2026
Are you a landowner? Make sure your lad has beaver inclusive practices! I love learning about topics outside of my own area of research! #NACCR2026 #wildlifeconservation
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Peter N. Dudley @conservation.bio · 12/07/2026
The most stressful part of my trip to ##NACCR2026 is now over. I figured out how to pay for the bus.
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Peter N. Dudley @conservation.bio · 12/07/2026
🥳🎊
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 11/07/2026
www.latimes.com/california/s... The Trump administration rolled back the Endangered Species Act on Friday, slashing protections to the habitats of endangered species and paving the way for more drilling and mining. 🧪🌎
latimes.com
Trump slashes wildlife protections, putting endangered California animals at risk
The Trump administration rolled back the Endangered Species Act on Friday, slashing protections to the habitats of endangered species and paving the way for more drilling and mining.
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Miranda Yaver @mirandayaver.bsky.social · 12/07/2026
I submitted my comment on the dangers of finalizing the OMB rule. Have you? Tomorrow, July 13 is the deadline!
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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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Sophia Winkler-Schor, PhD @scientistsophia.bsky.social · 10/07/2026
Come say hi at #NACCR2026! We have some great #consocsci content going on! Don't forget to join us for the @scbsswg.bsky.social business meeting!
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Ben Goldfarb @bengoldfarb.bsky.social · 08/07/2026
when you never learned the salmon life cycle
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COMPASS @compassscicomm.bsky.social · 22/06/2026
We're excited to join colleagues from across #conservation and #restoration at #NACCR2026 in Milwaukee this July! If you’re attending, we hope you'll join us at any of our 3 events to strengthen #scicomm skills, exchange ideas, and build connections. Learn more: buff.ly/CMYTtFT
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Galatea H @galateainthewild.bsky.social · 11/06/2026
Beavers play an important role in creating habitat connectivity for terrestrial mammals, and their dams are favoured over other structures. 🧪🌍
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Peter N. Dudley @conservation.bio · 11/06/2026
These are really cool 🧪 www.nature.com/immersive/d4...
nature.com
Five winning images of scientists at work
From sky to sea, and then back to the lab, here are the top images from Nature’s 2026 photo competition.
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Robert Boessenecker, Dr. of Whaleontology ™️ @coastalpaleo.bsky.social · 07/06/2026
On Friday I took my *luckiest* and *most disgusting* wildlife shot so far: a California sea lion (Z. californianus) puking up a bunch of rocks! 🤮🪨 That's right - many pinnipeds use gastroliths. The gastroliths are in mid-air! 🦖🐬🦑 #nature #photography #sealion
A photo of a young light brown California sea lion puking up some rocks. Two large rocks are in mid-air along with brownish fluid, and about a half dozen rocks are already on the ground from a minute prior.
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Gizmodo @gizmodo.com · 08/06/2026
Scientists Capture First Photo Evidence of Dwarf Island Fox Not Seen in 20 Years gizmodo.com/scientists-capture-firs…
gizmodo.com
Scientists Capture First Photo Evidence of Dwarf Island Fox Not Seen in 20 Years
The Cozumel dwarf fox has lived on the island for thousands of years, but much about it remains a mystery.
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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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Alisa Bokulich @alisabokulich.bsky.social · 25/05/2026
I have been collecting funky folk-art fish figurines on various trips & finally strung them together to make a reef fish mobile that reminds me of snorkeling as they spin in the breeze 🐟🐠🎏 🤿 🌊
A tropical fish mobile hanging in a corner made of colorful papier mâché & painted wood funky folk art fish. They remind me of snorkeling & a school of fish swimming around a coral reef
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Syrus Hyena @syrushyena.bsky.social · 25/05/2026
New way to view these Data Centers that are draining the communities they implant themselves in... draining resources for slop
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Antonia Klöcker @cakloecker.bsky.social · 18/05/2026
📢 New IMR study on movement patterns of #BaskingSharks shows that sharks tagged above the #ArcticCircle in #Norway perform repeated large-scale movements to subtropical waters and actively use the water column across habitats.🧵 1/5 👉 doi.org/10.3354/meps... @whoi.edu @thembauk.bsky.social
Map of the showing seasonal shark migration routes in the Northeast Atlantic. Sharks move to the Norwegian and Barents Seas in summer (May–July), the Icelandic Basin in autumn (September–December), and the Western European Basin in winter (January–March). Colored arrows indicate migration paths of the sharks illustrated as black silhouettes.
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gavin jones @ecologyofgavin.bsky.social · 15/05/2026
10 yrs after our first paper on spotted owls & “megafires”, here is the granddaddy of them all: a Wildlife Monograph. >30 yr of detection/non-detection data across >1500 territories (796 burned) and movement data from 171 GPS-tagged owls. Conclusion: big hot fire bad doi.org/10.1002/wmon...
doi.org
TWS Journals
For the past few decades, northern and California spotted owls (SPOW) have declined across much of their range in response to habitat loss and fragmentation and have faced threats associated with the...
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Ben Goldfarb @bengoldfarb.bsky.social · 01/05/2026
Neat study on how the removal of fencing along the Trans-Mongolian Railway allowed Asiatic wild asses to recolonize their historic range. Now we need more permanent wildlife crossings to help these guys out. #fenceecology #roadecology www.cambridge.org/core/journal...
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Ben Goldfarb @bengoldfarb.bsky.social · 29/04/2026
All works of prose, fiction or non-, could benefit from the incorporation of a sturgeon.
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RetroAndyArt @retroandyart.bsky.social · 22/04/2026
Happy Earth Day, everybody! (Poster by me with some NASA public domain photos)
An 80s-style poster featuring the Earth floating in space with the text "Earth: It's where I keep my stuff!"
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Ben Goldfarb @bengoldfarb.bsky.social · 15/04/2026
Almost 60 percent of the lifetime diets of taimen in Russia's Tugur River is *adult chum salmon*. Imagine what a bad-ass freshwater fish you have to be to just inhale salmon like they're mayflies. conbio.onlinelibrary.wiley.com/doi/10.1111/...
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MFCarter @mfcarter.bsky.social · 09/04/2026
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Katie Mack @astrokatie.com · 07/04/2026
Whoa 🤯 The Moon, in full eclipse, with the #Artemis II Orion spacecraft. Part of the Moon and spacecraft are lit by Earthshine, and both Saturn and Mars are visible to the lower right. Incredible. Details: images.nasa.gov/details/art0...
[alt text by NASA] The Moon, seen here backlit by the Sun during a solar eclipse on April 6, 2026, is photographed by one of the cameras on the Orion spacecraft’s solar array wings. Orion is visible in the foreground on the left. Earth is reflecting sunlight at the left edge of the Moon, which is slightly brighter than the rest of the disk. The bright spot visible just below the Moon’s bottom right edge is Saturn. Beyond that, the bright spot at the right edge of the image is Mars. Credit: NASA
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 07/04/2026
I got so annoyed with some of You People that I made a meme Science is not why you and your family are struggling, friends. President Trump and Congressional Republicans are the reason why you and your family are struggling.
"That foreigner wants your cookie" cartoon, but it's ICE with all the cookies, and US science agencies not immigrants.
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Colton the fish squeezer🐟🪴📚🏕️🐝 @fishsqueezer.bsky.social · 05/04/2026
Sad that it died, but maybe this enterprising gray whale in the Willapa River just wanted to show the salmon how real carcass enrichment works? I hope this turns into a bear bonanza, that would be awesome. Nobody tell Oregon. 🐟🌎🦊
oregonlive.com
Gray whale that swam 20 miles up Willapa River has died
A young gray whale that swam about 20 miles up southwest Washington’s Willapa River this week has died, ending a strange journey that drew widespread attention.
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Madison Earhart, PhD @madisonearhart.bsky.social · 05/04/2026
happy #sturgeonsaturday (on sunday)! 🧪👩🏻‍🔬🌐🦑🌎 did you know that sturgeon rely heavily on scent & feel to find food rather than eyesight? in the photo you can see the barbels (like whiskers) & the 2 nostrils - which are basically the same size as the eye! these strong sniffers are quite impressive 👃
a large sturgeon in the Fraser river held by a smiling Madison on the nose and Chris on the tail. you can see the sturgeons face clearly highlighting the size of the nose and eyes
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Peter N. Dudley @conservation.bio · 02/04/2026
HEC-RAS 2025 is now in Beta!!! Looks like they haven't updated the site yet but if you download it you can get Beta. 🧪
hec.usace.army.mil
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Madison Earhart, PhD @madisonearhart.bsky.social · 28/03/2026
happy #sturgeonsaturday ! this is the time of year that sturgeon wake up from their overwintering cuddling and move around in search of food! in the Fraser River, BC this usually aligns with the eulachon spawning run, a crucial sturgeon food source, full of fat after a long winter 🍽️ 🧪👩🏻‍🔬🌎🌐🦑🐟
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Colton the fish squeezer🐟🪴📚🏕️🐝 @fishsqueezer.bsky.social · 25/03/2026
My gosh, the helicopter pruning some conifer branches on camera at the 5:10 mark is a harrowing example of the risk that accurately counting and managing wolves sometimes requires. Great video from @biographic.bsky.social 🌎🧪🦊 www.biographic.com/how-to-count...
biographic.com
How to Count a Wolf - bioGraphic
The first step in managing a rare and controversial predator—particularly in a state where it's been absent for decades—is knowing how many you have. That’s easier said than done with a species as elu...
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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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ApexRMS Ecology @apexrms.bsky.social · 25/03/2026
🌎️🧪 Ecology, forestry, or geography students — ApexRMS is hiring a Wildfire Specialist Intern! 6-month remote role starting April 6. Deadline: March 31st. apexrms.com/careers/ #Hiring #Wildfire #Canada #Forestry #Ecology
apexrms.com
Careers - ApexRMS
Join a team of high-caliber scientists, modelers, and software developers.
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Wildlife Conservation Society @wcs.org · 24/03/2026
The striped hyena is in decline. There are fewer than 10,000 left. “Yet it remains largely overlooked in global policy frameworks,” says WCS’s Sue Lieberman. 🌎 At #CMSCOP15, we are supporting a proposal for protections. bit.ly/4uPPUEC
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Kingfisher & Wombat @tkingfisher.com · 19/03/2026
Please soothe your soul with this footage of an enraged muppet being treated at the wild muppet center.
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Dee Chan @deechan17.bsky.social · 18/03/2026
My late husband would have been so excited about this news! Scientists discover new heavy proton-like particle at CERN share.google/8aKm98yYU5NE...
share.google
Scientists discover new heavy proton-like particle at CERN
Scientists from the University of Manchester have played a leading role in the discovery of a new subatomic particle at CERN's Large Hadron Collider (LHC). The particle, known as the Ξcc⁺ (Xi‑cc‑plus)...
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Nicolas Mouquet @nmouquet.bsky.social · 09/03/2026
‪ 🌳 Do you want to contribute to research on how humans perceive forests? Take this quick, anonymous 10-min survey 🌲 👉 www.biodiful.org#/forest This will help us explore how people experience forest biodiversity! Please share on 🦋 & tag @biodiful.bsky.social to reach more participants 🙏💚 🌐🌍🦤🦑🪴🍁🧪
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Allan Mee @kerryeaglemee.bsky.social · 11/03/2026
Two new bird species identified in Amazonia 🌎 www.sci.news/biology/amaz...
sci.news
Two New Bird Species Identified in Amazonia | Sci.News
An antbird long thought to be a single widespread species across the Amazon rainforest is, in fact, several different ones. Among them are two newly-described species -- Cercomacra mura and Cercomacra...
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Jacquelyn Gill @jacquelyngill.bsky.social · 10/03/2026
I would like to interrupt your doomscrolling for an important announcement: This figure from Ellen Dymit et al., 2025, depicts the proportion of vertebrate prey in felid scat, recorded as a Proportion of Occurrence (PoO). 💩
A figure depicting the relative abundance of different prey items among two species of felid (e.g., monkey, small bird, agouti), derived from scat. The x axis is labeled "PoO (%)."
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