Romaric Jac

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…

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...

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

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...

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

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

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

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...

I am bravely asking::
defector.com/why-not-have...

#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

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...

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...

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. 🤩🦈

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.

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...

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...

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!

#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
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🚨 rdcu.be/elqvS

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.

www.nature.com/articles/s41...

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

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

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 🦈

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

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!

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 🌞

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....