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Romaric Jac

@romaricjac.bsky.social
120 followers 145 following 5 posts

PhD candidate at Université du Québec | Capelin migrations | Otolith chemistry | Fisheries ecology | Movement behaviour

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Romaric Jac @romaricjac.bsky.social · 08/09/2026
Happy to have been part of this work with the team. We looked at how climate change is reshaping polar waters, and what that means for protecting sharks, rays, as well as their wonderful cousins the chimaeras.
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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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ICES - International Council for the Exploration of the Sea @icesmarine.bsky.social · 05/05/2026
@romaricjac.bsky.social will explore what otolith chemistry can reveal about capelin migrations. 🗣️Big moment for me in my final PhD year! I’m excited to present all my results, connect with others working on cold-water small pelagic fish, exchange ideas, & discover new projects & innovative methods.
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ICES - International Council for the Exploration of the Sea @icesmarine.bsky.social · 05/05/2026
Small pelagic fish experts have gathered in La Paz, Mexico, to talk all things herring, capelin, sardine, mackerel & more at the 3rd Small Pelagic Fish symposium-SPF2026! We're proud to present some of the early-career scientists we have funded to be at SPF-2026👇 @fao.org @picesmarinesci.bsky.social
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PLOS One @plosone.org · 17/03/2026
New research from @romaricjac.bsky.social et al show that deep-water cartilaginous fishes, along with some of their prey species, are expanding their ranges northward into Arctic regions, highlighting how climate change may reshape marine biodiversity and species distributions. plos.io/4sYteQX
journals.plos.org
Moving north: Warmer waters expand populations of deep-water cartilaginous fishes into Arctic waters
Continental shelf and deep ocean ecosystems are increasingly exposed to anthropogenic pressures including commercial fishing and climate change related environmental stressors. Among the most…
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Romaric Jac @romaricjac.bsky.social · 06/03/2026
Climate-driven shifts aren't just happening at the surface. Using 26 years of data, we show that deep-water sharks and chimaeras are moving northward into Arctic waters🦈 Their prey are moving too, suggesting that the entire deep-sea community is on the move. Read it here👉 doi.org/10.1371/jour...
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Bergen Telemetry Network @bergentelemetry.bsky.social · 06/03/2026
We’ve completed our second season with chimaera tagging! And we caught something very cool 👀🦈 Curious about what? Find out here www.bergentelemetry.com/post/trackin... #SOSF_GhostTrack #NFR_PUFFINS
bergentelemetry.com
Second tagging campaign for ghost sharks
When late November 2025 arrived, we headed out again to try to tag more chimaeras. Divers tend to spot chimaeras in the shallow bays during winter, often at 30 meters or less. We didn’t catch any indi...
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Romaric Jac @romaricjac.bsky.social · 09/02/2026
Excited to share our first paper on capelin otolith chemistry in the Gulf of St. Lawrence. We reveal stable, region-specific signatures over time, a key first step toward tracking natal origins and migrations. Many exciting questions ahead! Read here 👉 www.sciencedirect.com/science/arti...
sciencedirect.com
Multi-year stability of spatial patterns in capelin otolith-edge chemical fingerprints in the Gulf of St. Lawrence, Canada
In the Gulf of St. Lawrence (GSL, Canada), the population structure and dynamics of capelin (Mallotus villosus), an abundant small pelagic forage fish…
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Lotte S Dahlmo @lottesdahlmo.bsky.social · 26/01/2026
My first PhD paper is published! We did a co-occurrence network analysis of tagged spiny dogfish in the fjords 🦈 Read it here: doi.org/10.1093/ices... @bergentelemetry.bsky.social #SqualusAcanthias #Spurdog
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Dr Anna Sturrock @otolithgirl.bsky.social · 19/01/2026
New #OA paper in Ecological Informatics comparing automated methods for provenance assignment using chronological chemical records deposited into archival structures such as #otoliths, #lenses, #statoliths. Our focus was on #salmon but it has much broader application. doi.org/10.1016/j.ec...
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Lotte S Dahlmo @lottesdahlmo.bsky.social · 19/01/2026
Wohoo! Another two chimaera monstrosa tagged tonight 🤩 The coloration is beautiful! Thanks to @saveourseas.bsky.social for funding the #SOSF_GhostTrack project! We’re going out again tomorrow! @bergentelemetry.bsky.social
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Emma Vogel @efvogel.bsky.social · 20/11/2025
We are hiring: #PhD fellow in Ecosystem-based management and marine connectivity🐋🧪🛰️ Want to work with tracking data from migratory species to identify ecological corridors and help inform biodiversity conservation priorities? Apply by Dec 7th! @bioprotectproject.bsky.social tinyurl.com/ytfmfhfc
jobbnorge.no
PhD Fellow in Ecology/Ecosystem-Based Management (289259) | UiT The Arctic University of Norway
Job title: PhD Fellow in Ecology/Ecosystem-Based Management (289259), Employer: UiT The Arctic University of Norway, Deadline: Sunday, December 7, 2025
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Sabrina Imbler @sabs.bsky.social · 12/09/2025
I am bravely asking:: defector.com/why-not-have...
defector.com
Why Not Have A Rod Of Teeth On Your Forehead For Sex Reasons? | Defector
If you are human, you might believe that teeth belong in the mouth. If you are a fish, you already know better. You know that teeth belong in the skin, too. These teeth are fittingly called dermal den...
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The FSBI @thefsbi.bsky.social · 28/08/2025
#JFB: Tag attachment innovation on spurdog (𝘚𝘲𝘶𝘢𝘭𝘶𝘴 𝘢𝘤𝘢𝘯𝘵𝘩𝘪𝘢𝘴) reveals year-round coastal association of pregnant females in northeastern Atlantic waters doi.org/10.1111/jfb.16000 #FishSci
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Romaric Jac @romaricjac.bsky.social · 14/08/2025
Curious about how to study forage fishes (in Canada)? 🐟 Our new paper reviews current approaches, identifies key knowledge gaps, and offers advice on methods to address them. Read it here 👉 link.springer.com/article/10.1...
link.springer.com
Tracking the schools: a review of approaches to address knowledge gaps in the migratory ecology and habitat use of Canadian forage fishes - Reviews in Fish Biology and Fisheries
Forage fishes play a vital role to marine ecosystems by linking lower trophic levels to top predators and serving as key economic and food resources for commercial and subsistence fisheries. Despite t...
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Paul Clerkin @paulclerkin.bsky.social · 22/07/2025
Hard to believe it has been over 10 years since I discovered this NEW SPECIES of ghost shark during #AlienShark on @SharkWeek. I named the species the SeaFarer’s Ghost Shark (Chimaera willwatchi) for my hard working friends onboard the fishing vessel Will Watch. 🤩🦈
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bioGraphic @biographic.bsky.social · 16/07/2025
Teeny Tiny Trackers Take to the Water A new generation of petite, submersible tracking tags offers a fresh look at the lives of little fishes. by @moiradonovan.bsky.social www.biographic.com/teeny-tiny-t...
biographic.com
Teeny Tiny Trackers Take to the Water - bioGraphic
A new generation of petite, submersible tracking tags offers a fresh look at the lives of little fishes.
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Johann Mourier @sharkmourier.bsky.social · 29/05/2025
Our Special Issue on fish telemetry is finally published in Journal of Fish Biology @thefsbi.bsky.social including 28 papers on freshwater & marine fish movement & behaviour. Thank all authors and guest editors Taryn Murray, Robert Lennox & Kim Birnie-Gauvin onlinelibrary.wiley.com/toc/10958649...
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Brit Finucci @britfinucci.bsky.social · 27/05/2025
I've waited a decade to finally have the chance to work with this ghost #shark 👻🦈 legend. While we were geeking away on this giant beast, we also got word that the first and only Ghost Sharks of the World book finally has a released date. Coming to you January 2026!
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Antonia Klöcker @cakloecker.bsky.social · 12/05/2025
#BaskingSharks of the #ArticCircle 📢Tracking the second largest #fish for a full year, our new paper invites you on a deep #dive into the life of a cold water giant between the Barents Sea and the Azores 🐟❄️🌊🏝️🇳🇴 #sharkscience #IMR @forskning.no @aquatictracking.bsky.social 🧵 1/4 🚨 rdcu.be/elqvS
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Alec BM Moore @alecbmmoore.bsky.social · 08/05/2025
www.nature.com/articles/s41...
nature.com
Herring spawned poleward following fishery-induced collective memory loss - Nature
A critically low abundance of older herring due to age-selective fisheries resulted in an approximately 800-km poleward shift in main spawning.
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Save Our Seas Foundation @saveourseas.bsky.social · 02/05/2025
Meet Lotte, a recipient of our Keystone Grant. We look forward to following along as Lotte will use acoustic telemetry to complete the first advanced tracking study of chimaeras. More info here: saveourseas.com/project/the-... #SOSF2025Projects #saveourseasfoundation #chimaeras
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Sharks International 2026 @sharks-int.bsky.social · 19/03/2025
Help shape #SI2026, the world’s largest shark, ray, and chimaera conference, May 4–8, 2026, in Colombo, Sri Lanka, by submitting your proposals. 📄 Reminder: The call for abstracts opens later this year! 🔗 Click this link to access the submission form: lnkd.in/gWrwTUCc
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Lotte S Dahlmo @lottesdahlmo.bsky.social · 04/03/2025
Super eager about leading my first tracking project!! Huge thanks to @saveourseas.bsky.social for funding our #SASF_GhostTrack project!! Can’t wait to see what the data will look like 🦈
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Hugo Flávio @hugoflavio.com · 14/03/2025
New paper out! An analysis of recent advances and challenges in tag miniaturization. I had a good time drawing Figure 3 (see below). Small things can help ensure the tagged animals recover fully!
doi.org
How small can they go? Microelectronic tags for movement ecology of small aquatic organisms
Abstract. Miniaturization and optimization of batteries and electric components, as well as new technological innovations, are driving increased use of mic
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Emma Vogel @efvogel.bsky.social · 06/03/2025
Excited to have contributed to this study where we tracked 29 sperm whales in the North Atlantic! 🐳 Some traveled nearly 8000km and dove deeper then 1000m! 🛰️🌊 www.nature.com/articles/s41... This is one of my favorite photos taken during this fieldwork of a 🐳 diving under the midnight sun 🌞
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Romaric Jac @romaricjac.bsky.social · 06/01/2025
What a fantastic way to kick off the year! Thrilled to have contributed to this paper on spurdog movement and habitat use in Norway 🦈 Read more: doi.org/10.1111/jfb....
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