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Johann Mourier

@sharkmourier.bsky.social
4.5K followers 692 following 91 posts

Shark scientist 🦈 & behavioural ecologist | Animal Social Networks Junior Professor at University of Montpellier @umontpellier.bsky.social | Lab MARBEC Website: www.johannmourier.com

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Reposted by Johann Mourier
Royal Society Publishing @royalsocietypublishing.org · 15h
A new theme issue brings together research on multi-predator feeding aggregations - co-occurrences of several species of predators simultaneously exploiting the same prey resource - in ocean environments. Read: buff.ly/3PUyvRi
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Johann Mourier @sharkmourier.bsky.social · 15/10/2026
New paper in @royalsocietypublishing.org Phil. Trans.R.Soc. B 🦈🌊 Our biomechanical model & field evidence reveal how shark size, buoyancy, and energy-saving opportunities in upwelling currents may shape the fine-scale distribution of shark species. Paper: royalsocietypublishing.org/rstb/article...
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Johann Mourier @sharkmourier.bsky.social · 09/10/2026
Back from a workshop ANR SIOMPA near Kruger Park in South Africa. Hard work but also enjoyed exceptional wildlife.
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Johann Mourier @sharkmourier.bsky.social · 09/09/2026
Great review on shark nurseries! link.springer.com/article/10.1...
link.springer.com
Cradles of the sea: a global review of shark nurseries - Reviews in Fish Biology and Fisheries
Conservation requires the management and protection of not only wildlife populations, but the habitats they rely on. The identification and characterization of these essential habitats is a key first ...
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Johann Mourier @sharkmourier.bsky.social · 03/09/2026
🐟Biodiversity isn’t only about species, genes or ecosystems It’s also about behaviour. Our new review explores why behavioural diversity in fish matters & why we need to consider variation, not just averages, when predicting responses to environmental change. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Behavioural Diversity of Fishes: Concepts, Drivers and Its Role in Conservation and Management
Human activity has altered nearly all ecosystems on Earth, contributing to substantial biodiversity loss across taxonomic, genetic and functional dimensions, from the intraspecific to the ecosystem s...
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Johann Mourier @sharkmourier.bsky.social · 02/09/2026
Happy to have been part of this great collaborative work!
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Johann Mourier @sharkmourier.bsky.social · 17/08/2026
Our new Perspective examines gender representation across 12,000+ publications in shark & ray science Paper: doi.org/10.3389/fris... Women’s participation is growing, but progression into senior authorship remains uneven. We need diverse scientific talent for better conservation. WE CAN DO BETTER!
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Johann Mourier @sharkmourier.bsky.social · 12/08/2026
Peace and serenity... Nice 97% eclipse over the lagoon of Thau in Sete! 🌖
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Reposted by Johann Mourier
Dr. Aaron Thierry @thierryaaron.bsky.social · 10/08/2026
2003 was once exceptional. Now it's average. 2024's record will be average by the mid-2040s. The extreme summers of the 2040s don't bear thinking about! 🌡🥵😬 #ClimateEmergency After @edhawkins.org & @stottpeter.bsky.social using ERA5 + CMIP6.
European summer temperature, June to August, over 10°W-40°E, 30-50°N, the region Stott et al. used for the 2003 heatwave, relative to 1961-1990. The black line shows ERA5 observations from 1950 to 2025, rising from about zero in the mid-twentieth century to 2.75°C in 2024. Grey shading is the 5-95% range of 34 CMIP6 models over the historical period, blue shading the same models under SSP2-4.5 to 2100, with the running median in white. Two dotted lines mark the 2003 summer at 2.06°C and the 2024 summer at 2.75°C, each dropping to the year the model median reaches that level: 2027 and 2045. Model region approximated by the IPCC AR6 Mediterranean and West & Central Europe regions, weighted 0.75 to 0.25.
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Reposted by Johann Mourier
David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 01/08/2026
Global trade responses to shark finning regulations | Nature Communications
nature.com
Global trade responses to shark finning regulations - Nature Communications
The study finds limited evidence that shark finning regulations alter global shark trade volumes. While overall effects are not significant, long-term trends suggest gradual trade shifts, including…
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Reposted by Johann Mourier
Dr Vincent Raoult @sawsharkman.bsky.social · 16/07/2026
Heads up, I'm looking for one, possibly 2 PhD candidates for amazing projects! lnkd.in/p/gCrd4UNm
lnkd.in
Calling prospective PhD candidates! I'm pleased to announce that I'm looking for one and perhaps two PhD candidates. One will be involved with an ARC Linkage project on sea cucumbers across ...
Calling prospective PhD candidates! I'm pleased to announce that I'm looking for one and perhaps two PhD candidates. One will be involved with an ARC Linkage project on sea cucumbers across the Grea...
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Reposted by Johann Mourier
Amanda Arnold 🦈 @amandasodysseys.bsky.social · 13/07/2026
We also built a free Shark & Ray MPA Explorer so researchers, managers, and conservationists can explore species-level MPA coverage for all 1,158 species. If you're interested in sharks and rays, take a look! tinyurl.com/SharkRayMPAExplorer @sfubiosciences.bsky.social @society4conbio.bsky.social
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Reposted by Johann Mourier
Denis REALE 🇨🇦 @denisreale.bsky.social · 19/06/2026
Should the term 'personality trait' be really used in animal personality studies? With Sasha Dall and @dingemanselab.bsky.social we don't think so. We explain why in this commentary published in Animal Behaviour. www.sciencedirect.com/science/arti...
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Reposted by Johann Mourier
Dr Vincent Raoult @sawsharkman.bsky.social · 15/06/2026
A reminder to everyone: while this year's number of shark incidents seems high, it's actually nowhere near the maximum NSW has had historically. In fact, for the last 5 years, shark bite rates have been similar to what they were 20 years ago.
Graph of shark bite numbers across time in NSW, Australia, separated into fatal and injured categories. Both trends are very slightly increasing since year 2000, with the greatest number of bites in 2015.
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Johann Mourier @sharkmourier.bsky.social · 28/05/2026
😮 🤯
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Johann Mourier @sharkmourier.bsky.social · 20/05/2026
How cool is that! 😮 First live in situ observations of the iconic goblin shark (Mitsukurina owstoni) on a seamount near Jarvis Island in 2019 & on the slope of the Tonga Trench in 2024. Past observations are restricted to specimens hauled to the surface onlinelibrary.wiley.com/doi/10.1111/...
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Johann Mourier @sharkmourier.bsky.social · 11/05/2026
Interesting! We also observed this behaviour in 2017 in French Polynesia! But we were not able to publish it. It means that this behaviour is widespread across oceans! See below our observation:
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Johann Mourier @sharkmourier.bsky.social · 11/05/2026
Thnks
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Johann Mourier @sharkmourier.bsky.social · 11/05/2026
Do you have the link of the paper(s) ?
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Johann Mourier @sharkmourier.bsky.social · 11/05/2026
We already observed this on several occasions in French Polynesia!
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Reposted by Johann Mourier
RogueESR @rogueesr.bsky.social · 29/04/2026
#ESR « Vous nous avez "piqué" 500 millions en deux ans », le coup de gueule du PDG du CNRS devant le Sénat. www.challenges.fr/economie/vou...
challenges.fr
« Vous nous avez "piqué" 500 millions en deux ans », le coup de gueule du PDG du CNRS devant le Sénat
« Je ne sais pas comment mon successeur va boucler le budget l’an prochain. » Devant les sénateurs, l’actuel PDG du CNRS est revenu sur les contraintes budgétaires imposées à l’institution, malgré une...
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Reposted by Johann Mourier
The FSBI @thefsbi.bsky.social · 14/04/2026
The Journal of Fish Biology is publishing a Special Issue reflecting the theme of this year’s FSBI Symposium: Breaking Siloes in Fish Biology! Now open for submissions, with papers to be made available as early view from acceptance. For further information, please visit: bit.ly/4trMdnD
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Reposted by Johann Mourier
Current Biology @currentbiology.bsky.social · 27/03/2026
Why can't we just get along with wild animals? Jennifer Green and Kaitlyn Gaynor introduce human–wildlife conflict in this Primer. www.cell.com/current-biol...
cell.com
Human–wildlife conflict
Kaitlyn Gaynor and Jennifer Green introduce the many forms of conflict between humans and wild animals.
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Johann Mourier @sharkmourier.bsky.social · 27/03/2026
What a cool science study! All in it is interesting: the biology, the methodology and the analyses.
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Johann Mourier @sharkmourier.bsky.social · 19/03/2026
I would say a Smooth hound shark (Mustelus sp...)
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Reposted by Johann Mourier
Université de Montpellier @umontpellier.bsky.social · 13/02/2026
#Classement | Une reconnaissance mondiale pour l’Université de Montpellier au classement du TIME Magazine 2026 avec une 244e place mondiale. ecomnews.fr/news/occitan...
ecomnews.fr
Occitanie : Une reconnaissance mondiale pour l’Université de Montpellier au classement du TIME Magazine 2026  - Ecomnews
Ce classement, développé par TIME Magazine en partenariat avec Statista R, vise à offrir une évaluation rigoureuse et contemporaine des universités du monde entier. Il repose sur des critères multidim...
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Reposted by Johann Mourier
Université de Montpellier @umontpellier.bsky.social · 02/02/2026
‪ #jpoUM 📅📣 J-12 | PORTES OUVERTES de l’Université de Montpellier 🗓️ Samedi 14 février 2026 📍 Tous les campus de l'UM 🎓 +600 diplômes, échanges, visites, conférences 👉 Orientation & masters au programme ! 🔗 + d'infos : www.umontpellier.fr/agenda/journ...
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Johann Mourier @sharkmourier.bsky.social · 26/01/2026
doesn't look like a common eagle ray on the picture...
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Reposted by Johann Mourier
Pimiento Research Group @pimientogroup.bsky.social · 22/01/2026
Our new paper is online! We found that 1) today's shark & ray diversity was already reached ~100Ma; 2) that the K/Pg extinction was not catastrophic; 3) that the max diversity was reached ~50Ma; and 4) that today's diversity is depleted compared to the past. www.cell.com/current-biol...
cell.com
Revealing the hidden patterns of shark and ray diversity over the past 145 million years
Gardiner et al. reconstruct the diversity of sharks and rays across the past 145 million years using deep learning and an extensive dataset. Their results unveil previously hidden patterns, including ...
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Reposted by Johann Mourier
Nick Dulvy @nickdulvy.bsky.social · 22/01/2026
Sharks & rays are sentinels of ocean health. - Global abundance has been fished down by 65%, - Now 37.5% of species are threatened, - The current extinction rate is 25–250 times greater than the background fossil record, with greatest losses in tropical coastal seas. #BiodiversityTargets
Extinction risk and the spatial patterning of shark, ray and chimaera richness, including hotspots of coastal and deepwater richness, for wide-ranging and endemic species.
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Reposted by Johann Mourier
Nick Dulvy @nickdulvy.bsky.social · 22/01/2026
New paper out today in @natrevbiodiv.nature.com by the #GlobalSharkTrends team: Bending back the curve of shark & ray biodiversity loss; Read the paper here: rdcu.be/eZ9n9 @sfu.ca @sfubiosciences.bsky.social @earth2ocean.bsky.social
Bending back the biodiversity loss curve of sharks and rays. The loss of sharks and rays to date has involved serial depletion of the largest, most evolutionary and functionally distinct species, and the increasing prevalence of smaller-bodied species that have benefited from release from predation.
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Reposted by Johann Mourier
IUCN SSC Shark Specialist Group @iucnshark.bsky.social · 12/01/2026
NEW PAPER ALERT | Only One Percent of Important Shark and Ray Areas in the Western Indian Ocean Are Fully Protected From Fishing Pressure. Read the full paper in Ecology and Evolution here: doi.org/10.1002/ece3... #shark #ray #chimaera #ISRA #publication #biodiversity #conservation
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Johann Mourier @sharkmourier.bsky.social · 10/01/2026
‼️New paper‼️ Social units of the Crozet killer whales are composed of both related & unrelated individuals, with an additive mortality event from the late 1990s leading unrelated individuals that survived to associate and join social units. link.springer.com/article/10.1...
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Johann Mourier @sharkmourier.bsky.social · 15/12/2025
Une vidéo très complète avec le Collectif Les Argonautes dans laquelle on vous explique pourquoi un requin vivant est plus rentable à long terme qu'un requin mort. Illustrée par la réouverture de la pêche aux requins profonds aux Maldives (qui était un sanctuaire à requins). youtu.be/zmeGdN9JHOU?...
youtu.be
Un requin vaut-il plus mort ou vivant ? (avec Johann Mourier)
YouTube video by Collectif Les Argonautes
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Johann Mourier @sharkmourier.bsky.social · 04/12/2025
One of the best project I have ever seen. I love this battle between the smart Oz cockatoos 🦜 and human 🚶‍♂️about bins 🚮! It seems that this arm race is unlimited and will give scientists work for a long time 😄 It also give me great souvenirs of my year spent in Sydney!
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Johann Mourier @sharkmourier.bsky.social · 27/11/2025
bsky.app/profile/shar...
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Johann Mourier @sharkmourier.bsky.social · 27/11/2025
I will do! I am now also tracking using high-resolution telemetry some small fish species such as damselfish or Mediterranean rainbow wrasses.
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Reposted by Johann Mourier
Wildlife Conservation Society @wcs.org · 27/11/2025
Historic victory for sharks: #CITESCoP20 Parties voted to list oceanic whitetip sharks on Appendix I, the highest level of protection offered by CITES. “Today’s decision is a watershed moment for all sharks and rays,” said WCS’s Luke Warwick. 🌏 Read more: bit.ly/4olha9w
newsroom.wcs.org
Historic Victory for Sharks as Oceanic Whitetips Upgraded to Appendix I at CITES Banning International Trade
Samarkand, Uzbekistan, Nov. 27, 2025 – CITES CoP20 Parties voted to list oceanic whitetip sharks on Appendix I, the highest level of protection offered by CITES. The vote marks a major victory for one...
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Reposted by Johann Mourier
Shaun Killen @shaunkillen.bsky.social · 25/11/2025
🧵1/9 There are 35,000+ fish species, but we have formal social-behaviour classifications for a tiny fraction. Most knowledge lives in the experience of researchers, fishers, divers, aquarists, naturalists, and Indigenous communities, but almost none of it is centralised. So we built ShoalBase.org.
shoalbase.org
ShoalBase | Join, Explore, Contribute Now
ShoalBase offers a global database on fish social behaviour, supporting research, conservation, and ecology through community contributions and visual data mapping.
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Johann Mourier @sharkmourier.bsky.social · 25/11/2025
Great initiative !
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Johann Mourier @sharkmourier.bsky.social · 23/11/2025
La bataille a fait rage entre méduses & requins. Quel vainqueur? Pour le savoir écoutez l’émission BIGBANG @franceinter.fr animée par @christophegalfard.bsky.social Méduses défendues par @billfrancois.bsky.social) & requins par moi-même, arbitré par Guillaume Nery www.radiofrance.fr/franceinter/...
radiofrance.fr
Requin versus Méduse
Christophe Galfard reçoit Guillaume Néry, champion d'apnée , le biophysicien Bill François et Johann Mourier, biologiste pour un combat Requin VS Méduse.
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Johann Mourier @sharkmourier.bsky.social · 03/11/2025
Shark SUPER-HABITATS : key for conservation! Habitats that include all critical activities of shark's life cycle: resting, feeding, cleaning, mating, parturition. news.fiu.edu/2025/super-h...
news.fiu.edu
Super-habitats could hold key to shark conservation
Scientists have identified a super-habitat for reef sharks in Fakarava. The finding could have major implications for conservation.
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Reposted by Johann Mourier
EEA2025 @eea2025.bsky.social · 29/10/2025
✨ Maria shared her research on leveraging ISRA declaration into conservation action: Common Guitarfish within the Murcia Eastern Coast case study #EEA2025
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Johann Mourier @sharkmourier.bsky.social · 16/10/2025
It was already been reported. See this paper: micologia.uv.cl/index.php/rb...
micologia.uv.cl
Vista de Chafing behaviour from two carcharhinid shark species Carcharhinus falciformis and C. galapagensis on whale sharks Rhincodon typus
Revista de Biología Marina y Oceanografía. Publication of the FACIMAR. Universidad de Valparaíso
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Reposted by Johann Mourier
Nature Ecology & Evolution @natecoevo.nature.com · 17/09/2025
The number of individuals in a given space influences animal interactions and network dynamics. Here the authors identify general rules underlying density dependence in animal networks and reveal some fundamental differences between spatial and social dynamics. 🧪 www.nature.com/articles/s41...
nature.com
Density-dependent network structuring within and across wild animal systems - Nature Ecology & Evolution
The number of individuals in a given space influences animal interactions and network dynamics. Here the authors identify general rules underlying density dependence in animal networks and reveal some...
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Reposted by Johann Mourier
Greg Albery @gfalbery.bsky.social · 08/09/2025
Celebrating the publication of our big collaborative spatial-social meta-analysis of density-dependent transmission effects, out now in Nature Eco Evo! doi.org/10.1038/s415... (or rdcu.be/eD6eB)
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Johann Mourier @sharkmourier.bsky.social · 05/09/2025
Happy that my shark data contributed to this collaborative paper brilliantly led by @gfalbery.bsky.social on animal social networks. Out in @natecoevo.nature.com If density drives greater network connectedness, >80% of relationships are nonlinear (75% with saturating trends). Read: rdcu.be/eD6eB
rdcu.be
Density-dependent network structuring within and across wild animal systems
Nature Ecology & Evolution - The number of individuals in a given space influences animal interactions and network dynamics. Here the authors identify general rules underlying density...
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Johann Mourier @sharkmourier.bsky.social · 05/09/2025
Thanks, looking forward to reading it!
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Johann Mourier @sharkmourier.bsky.social · 05/09/2025
good job! do you have a link to the paper?
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Johann Mourier @sharkmourier.bsky.social · 31/08/2025
Our paper made the cover of the journal Animal Conservation Shark feeding affects health and female reproductive investment in blacktip reef sharks from French Polynesia zslpublications.onlinelibrary.wiley.com/doi/10.1111/...
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