Jon Kuntz, PhD 🦈
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sharkeye.bsky.social
Jon Kuntz, PhD 🦈
@sharkeye.bsky.social
2.1K followers 320 following 170 posts
Shark eyes and stable isotopes | Lecturer UC Merced | Alaska Department of Fish & Game 🦀 | AK Sea Grant State Fellow | (He/Him)
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sharkeye.bsky.social
Jon Kuntz, PhD 🦈 @sharkeye.bsky.social · Sep 22
Hi bsky sci community! I’m new here, so here’s a Sharky introduction! I’m an ecologist interested in understanding shark movement, diet, and population dynamics in the San Francisco Bay! Hope you’ll join me on this new app journey 🌎 🦈 🫶🏻
Ecologists working with a Leopard Shark on a boat in Tomales Bay, CA
Reposted by Jon Kuntz, PhD 🦈
profchrisharrod.bsky.social
"We found that despite the enormous spatial range of data, both pPOM and sPOM became 2.1‰ and 2.2‰ more 13C-depleted per decade, respectively, with parallel decreases in the δ13C values in consumers"

journals.plos.org/plosone/arti...
Trophic niche variation across the pan-Arctic coastal continuum
We analyzed stable carbon and nitrogen isotope values (δ13C and δ15N, respectively) for pan-Arctic coastal primary producers and consumers to detect large-scale regional trends both temporally and spa...
journals.plos.org
November 6, 2025 at 4:49 PM
Reposted by Jon Kuntz, PhD 🦈
friel.bsky.social
The earliest appearance of gigantic lamniform #sharks has now been pushed back by ~15 Ma (upper Aptian, ~115 Ma) with the discovery of enormous cardabiodontid shark remains from northern Australia.🦈🧪

www.nature.com/articles/s42...
Early gigantic lamniform marks the onset of mega-body size in modern shark evolution - Communications Biology
The earliest appearance of mega-body size in sharks is pushed back by 15 million years with the discovery of new fossils from Northern Australia. Using a comprehensive dataset of living sharks to esti...
www.nature.com
October 27, 2025 at 11:38 PM
Reposted by Jon Kuntz, PhD 🦈
sharkcolin.bsky.social
New #sharkscience from Hilary Lewis and others:
Challenging traditional methods of age estimation: elemental and isotopic characterisation of speartooth shark Glyphis glyphis vertebrae.
www.int-res.com/abstracts/me...
@iucnshark.bsky.social @austsocfishbiol.bsky.social @mickgrant.bsky.social
www.int-res.com
October 17, 2025 at 1:25 PM
Reposted by Jon Kuntz, PhD 🦈
albertruhi.bsky.social
Does tidal marsh #restoration "work", if the goal is bringing back key species AND the trophic interactions that support them? A thousand stable isotope samples later, we have answers! 💯 work by PhD student Megan Pagliaro:
esajournals.onlinelibrary.wiley.com/doi/10.1002/... #SanFrancisco #BayDelta
Does tidal marsh restoration lead to the recovery of trophic pathways that support estuarine fishes?
Evaluation of tidal marsh restoration success is typically based on the recovery of habitat size and target species. However, food-web structure may provide valuable insight into ecosystem functionin...
esajournals.onlinelibrary.wiley.com
October 12, 2025 at 2:14 PM
Reposted by Jon Kuntz, PhD 🦈
jay.bsky.team
“It actually doesn’t take much to be considered a difficult woman. That’s why there are so many of us.”
― Jane Goodall

💙 RIP to a real one. My childhood hero
Jane Goodall with monarch butterfly scarf
October 2, 2025 at 2:56 AM
Reposted by Jon Kuntz, PhD 🦈
iucnshark.bsky.social
A landmark scientific workshop has identified 124 Important Shark and Ray Areas (ISRAs) across the European Atlantic, providing the first comprehensive map of critical habitats for threatened species such as Basking Shark, Tope, Spiny Dogfish, Sicklefin Devil Ray, and Angelshark.
September 23, 2025 at 8:41 AM
Reposted by Jon Kuntz, PhD 🦈
dantheclamman.blog
One like, one clam fact
davidho.bsky.social David Ho @davidho.bsky.social · Jul 21
One like, one opinion about how to solve climate change.
holz-bau.bsky.social Mike Eliason @holz-bau.bsky.social · Jul 21
1 like, 1 housing opinion
July 22, 2025 at 3:18 AM
sharkeye.bsky.social
Foraged this King Bolete (Porcini) yesterday!

For dinner made a porcini pappardelle (pasta with and olive oil, parsley, and garlic sauce) and porcini carpaccio (raw porcini with parmesan and olive oil) 🤤
September 19, 2025 at 4:22 AM
sharkeye.bsky.social
News story on some of my PhD work…
caseagrant.ucsd.edu/news/shark-e...
Shark eyes tell tales
caseagrant.ucsd.edu
September 16, 2025 at 5:40 PM
sharkeye.bsky.social
This made me really happy today
September 15, 2025 at 11:46 PM
sharkeye.bsky.social
Can you name the four kinds of mushrooms my partner and I found foraging today? 🍄
August 25, 2025 at 8:20 AM
sharkeye.bsky.social
The silvers are coming through!
August 24, 2025 at 2:40 AM
Reposted by Jon Kuntz, PhD 🦈
curlybiologist.bsky.social
I finally did it. My first chapter is FINALLY written and out for all to see. If you’ve attended my talks you 100% know what this is about. If you haven’t attended my talks, shark nostrils are more interesting than we thought. Enjoy! academic.oup.com/icb/advance-...
Who Nose What Flows: Shark Narial Denticle Morphology and Hydrodynamic Implications
Synopsis. Dermal denticles (scales) are important in influencing the movement of water around a shark’s body. To date, most of the research on denticle mor
academic.oup.com
August 20, 2025 at 3:22 PM
sharkeye.bsky.social
Grades turned in! First time being the instructor on record was challenging but really enjoyed it @ucmerced.bsky.social
August 19, 2025 at 5:21 PM
sharkeye.bsky.social
I’m now in the desk rejection club! 🤩
August 15, 2025 at 10:42 PM
sharkeye.bsky.social
Just submitted my favorite chapter of my dissertation (2/5 ✅)
August 12, 2025 at 7:48 PM
Reposted by Jon Kuntz, PhD 🦈
sawsharkman.bsky.social
Nature giving some good material for your next horror flick as per usual. Barnacles (normally filter-feeding crustaceans) grow INSIDE deep water sharks. Some pretty hardcore piercings...
the-episiarch.bsky.social Veeloxxy Bites @the-episiarch.bsky.social · Aug 10
The shark-sucker barnacle - Anelasma squalicola - is a barnacle with an unusual habit.

Instead of filter feeding on plankton, it has evolved to parasitise deep sea squaloid sharks such as lantern sharks and Greenland shark 🦈
#Invertebrate 🧪
dailyparasite.blogspot.com/2014/09/anel...
<i>Anelasma squalicola</i> (revisited)
A few months ago I wrote a Dispatch   for Current Biology about a newly published study on Anelasma squalicola  - a parasitic barnacle that...
dailyparasite.blogspot.com
August 11, 2025 at 3:32 AM
Reposted by Jon Kuntz, PhD 🦈
taramcallister.bsky.social
Our new piece is out in @nature.com big mihi to all my co-authors it was a pleasure to work with you on this @lanipai.bsky.social @niiyokamigaabaw.bsky.social @napaaqtuk.bsky.social @sereananaepi.bsky.social @1nativesoilnerd.bsky.social Bradley Moggridge and Brittany Kamai
tinyurl.com/yc4y9kfk
Decolonize scientific institutions, don’t just diversify them | Nature
Indigenous scholars set out eight steps to stop marginalization in academia and to enable a shared Indigenous agenda in science. Indigenous scholars set out eight steps to stop marginalization in academia and to enable a shared Indigenous agenda in science.
www.nature.com
August 8, 2025 at 7:25 PM
Reposted by Jon Kuntz, PhD 🦈
dendromecon27.bsky.social
New paper out! Can planting monocultures of N-fixing trees in old pastures in Hawaiʻi lower invasive grass levels to the point of natural regeneration of native woody species? TLDR: nope.
onlinelibrary.wiley.com/doi/10.1111/...
Restoring with forest monocultures: a mechanistic look at invasive species suppression
To create conditions suitable for the recruitment of native forest species, tools are often needed to suppress grasses when restoring forests from abandoned pastureland. Planting trees is one method ....
onlinelibrary.wiley.com
August 6, 2025 at 5:55 PM
Reposted by Jon Kuntz, PhD 🦈
nannonstevens.bsky.social
Now with correct link: doi.org/10.1038/s415...
August 6, 2025 at 1:53 PM
Reposted by Jon Kuntz, PhD 🦈
albertruhi.bsky.social
Interested in climate change, invasive predators, and cross-ecosystem linkages? Check out our newest paper in @aslo.org's L&O, from a fun experiment we ran three summers ago in California's Sierra Nevada, beautifully led by postdoc @chaevangelista.bsky.social!
Stream Channels - One of the most unique features of SNARL is the experimental stream channel system. The original channels were established by US Fish and Wildlife researchers in the 1940’s and divided Convict creek into four sections up to 400 meters in length, with individual water-control structures and moveable fish barriers. An array of new experimental stream channels was built in the 1990’s, and consisted of nine identical stream sections, with identical patterns of riffles, pools, and meanders. Each channel is one meter wide and 50 meters long, with natural sediments and cobbles laid over a rigid concrete base. The new channels provide researchers with statistically meaningful replicates for controlled comparative studies. In addition to the experimental channels and divided stream sections, researchers have access to stretches of Convict Creek above and below the reserve, and to small channels flowing through the aquatic laboratory. Fig. 1. (a) Schematic presentation of the experimental setup with the four treatment combinations and their position within the experimental channels.(b) Underwater view of a riffle during high- and low-flow conditions
July 31, 2025 at 1:21 AM
sharkeye.bsky.social
Got surprised by a couple of Kodiak bears on our hike last night 🐻 be
July 29, 2025 at 7:34 PM
Reposted by Jon Kuntz, PhD 🦈
physiologyfish.bsky.social
New paper in Ecology & Evolution: analysed 187 species of rays & skates to explore patterns of sexual size dimorphism. Turns out SSD in rays doesn’t follow the same rules as in sharks.

❓Differences in reproductive strategies❓

🔗 doi.org/10.1002/ece3...

#SharkScience #Evolution #MarineBiology
July 22, 2025 at 8:21 AM
Reposted by Jon Kuntz, PhD 🦈
sharkscience.bsky.social
NEW PAPER: Occurrence and Maternal Transfer of Per- and Polyfluoroalkyl Substances (PFAS) in Pregnant Sharks from Florida Coastal Waters | Environmental Science & Technology 🦑🧪🌎🐟🦈 pubs.acs.org/doi/10.1021/...
Occurrence and Maternal Transfer of Per- and Polyfluoroalkyl Substances (PFAS) in Pregnant Sharks from Florida Coastal Waters
Per- and polyfluoroalkyl substances (PFAS) have been widely detected in various environmental media, attracting significant research and regulatory attention. This preliminary study investigated the o...
pubs.acs.org
July 18, 2025 at 12:24 PM
sharkeye.bsky.social
Currently under evacuation up here in Kodiak, AK… luckily our house is just above the tsunami line
July 16, 2025 at 10:33 PM