Johann Mourier
@sharkmourier.bsky.social
Shark scientist 🦈 & behavioural ecologist | Animal Social Networks
Junior Professor at University of Montpellier @umontpellier.bsky.social | Lab MARBEC
Website: www.johannmourier.com
Junior Professor at University of Montpellier @umontpellier.bsky.social | Lab MARBEC
Website: www.johannmourier.com
Pinned
Johann Mourier
@sharkmourier.bsky.social
· Aug 22
‼️ New important shark paper 🦈
We demonstrate that all critical life stages (resting, feeding, being cleaned, mating & giving birth) can occur in the small Fakarava channel & we define it as a “super habitat”
www.sciencedirect.com/science/arti... @dr-yannis.bsky.social @charlie-huveneers.bsky.social
We demonstrate that all critical life stages (resting, feeding, being cleaned, mating & giving birth) can occur in the small Fakarava channel & we define it as a “super habitat”
www.sciencedirect.com/science/arti... @dr-yannis.bsky.social @charlie-huveneers.bsky.social
Reposted by Johann Mourier
#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/news/occitan...
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...
ecomnews.fr
February 13, 2026 at 9:34 AM
#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/news/occitan...
Reposted by Johann Mourier
#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...
#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...
February 2, 2026 at 2:43 PM
#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...
#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...
Reposted by Johann Mourier
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...
www.cell.com/current-biol...
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 ...
www.cell.com
January 22, 2026 at 4:41 PM
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...
www.cell.com/current-biol...
Reposted by Johann Mourier
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
- 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
January 22, 2026 at 3:35 AM
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
- 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
Reposted by Johann Mourier
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
Read the paper here: rdcu.be/eZ9n9
@sfu.ca
@sfubiosciences.bsky.social
@earth2ocean.bsky.social
January 22, 2026 at 3:35 AM
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
Read the paper here: rdcu.be/eZ9n9
@sfu.ca
@sfubiosciences.bsky.social
@earth2ocean.bsky.social
Reposted by Johann Mourier
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
Read the full paper in Ecology and Evolution here: doi.org/10.1002/ece3...
#shark #ray #chimaera #ISRA #publication #biodiversity #conservation
January 12, 2026 at 8:16 AM
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
Read the full paper in Ecology and Evolution here: doi.org/10.1002/ece3...
#shark #ray #chimaera #ISRA #publication #biodiversity #conservation
‼️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...
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...
January 10, 2026 at 10:39 AM
‼️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...
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...
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/zmeGdN9JHOU?...
Un requin vaut-il plus mort ou vivant ? (avec Johann Mourier)
YouTube video by Collectif Les Argonautes
youtu.be
December 15, 2025 at 2:50 PM
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/zmeGdN9JHOU?...
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!
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!
By combining observational and controlled assay data, we documented the knowledge of individual birds: who knows how to open bins, and who can defeat commonly found bin protections. Surprisingly, we found several birds able to defeat high-efficacy protections, such as locks,as seen in the vid above.
December 4, 2025 at 4:13 PM
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!
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!
Reposted by Johann Mourier
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
“Today’s decision is a watershed moment for all sharks and rays,” said WCS’s Luke Warwick.
🌏 Read more: bit.ly/4olha9w
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...
newsroom.wcs.org
November 27, 2025 at 12:31 PM
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
“Today’s decision is a watershed moment for all sharks and rays,” said WCS’s Luke Warwick.
🌏 Read more: bit.ly/4olha9w
Reposted by Johann Mourier
🧵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 | 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.
ShoalBase.org
November 25, 2025 at 1:11 PM
🧵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.
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/...
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/...
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.
www.radiofrance.fr
November 23, 2025 at 11:22 AM
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/...
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/...
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...
Habitats that include all critical activities of shark's life cycle: resting, feeding, cleaning, mating, parturition.
news.fiu.edu/2025/super-h...
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.
news.fiu.edu
November 3, 2025 at 10:20 AM
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...
Habitats that include all critical activities of shark's life cycle: resting, feeding, cleaning, mating, parturition.
news.fiu.edu/2025/super-h...
Reposted by Johann Mourier
✨ Maria shared her research on leveraging ISRA declaration into conservation action: Common Guitarfish within the Murcia Eastern Coast case study #EEA2025
October 29, 2025 at 1:33 PM
✨ Maria shared her research on leveraging ISRA declaration into conservation action: Common Guitarfish within the Murcia Eastern Coast case study #EEA2025
Reposted by Johann Mourier
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...
www.nature.com/articles/s41...
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...
www.nature.com
September 17, 2025 at 8:53 AM
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...
www.nature.com/articles/s41...
Reposted by Johann Mourier
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)
September 8, 2025 at 2:53 PM
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)
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
If density drives greater network connectedness, >80% of relationships are nonlinear (75% with saturating trends).
Read: rdcu.be/eD6eB
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...
rdcu.be
September 5, 2025 at 2:32 PM
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
If density drives greater network connectedness, >80% of relationships are nonlinear (75% with saturating trends).
Read: rdcu.be/eD6eB
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/...
Shark feeding affects health and female reproductive investment in blacktip reef sharks from French Polynesia
zslpublications.onlinelibrary.wiley.com/doi/10.1111/...
August 31, 2025 at 8:06 AM
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/...
Shark feeding affects health and female reproductive investment in blacktip reef sharks from French Polynesia
zslpublications.onlinelibrary.wiley.com/doi/10.1111/...
New paper introducing the term of SUPER HABITAT for sharks in which all critical activities (resting, feeding, mating & giving birth) occurs.
🦈🌴❤️🍽️ 👶
Access the paper here:
www.sciencedirect.com/science/arti...
@dr-yannis.bsky.social @charlie-huveneers.bsky.social
🦈🌴❤️🍽️ 👶
Access the paper here:
www.sciencedirect.com/science/arti...
@dr-yannis.bsky.social @charlie-huveneers.bsky.social
August 23, 2025 at 6:51 PM
New paper introducing the term of SUPER HABITAT for sharks in which all critical activities (resting, feeding, mating & giving birth) occurs.
🦈🌴❤️🍽️ 👶
Access the paper here:
www.sciencedirect.com/science/arti...
@dr-yannis.bsky.social @charlie-huveneers.bsky.social
🦈🌴❤️🍽️ 👶
Access the paper here:
www.sciencedirect.com/science/arti...
@dr-yannis.bsky.social @charlie-huveneers.bsky.social
‼️ New important shark paper 🦈
We demonstrate that all critical life stages (resting, feeding, being cleaned, mating & giving birth) can occur in the small Fakarava channel & we define it as a “super habitat”
www.sciencedirect.com/science/arti... @dr-yannis.bsky.social @charlie-huveneers.bsky.social
We demonstrate that all critical life stages (resting, feeding, being cleaned, mating & giving birth) can occur in the small Fakarava channel & we define it as a “super habitat”
www.sciencedirect.com/science/arti... @dr-yannis.bsky.social @charlie-huveneers.bsky.social
August 22, 2025 at 4:56 PM
‼️ New important shark paper 🦈
We demonstrate that all critical life stages (resting, feeding, being cleaned, mating & giving birth) can occur in the small Fakarava channel & we define it as a “super habitat”
www.sciencedirect.com/science/arti... @dr-yannis.bsky.social @charlie-huveneers.bsky.social
We demonstrate that all critical life stages (resting, feeding, being cleaned, mating & giving birth) can occur in the small Fakarava channel & we define it as a “super habitat”
www.sciencedirect.com/science/arti... @dr-yannis.bsky.social @charlie-huveneers.bsky.social
Reposted by Johann Mourier
NEW PAPER ALERT | Important Shark and Ray Areas can inform conservation planning in the Mediterranean and Black Seas
Read the full paper in the journal iScience here: doi.org/10.1016/j.is...
#shark #ray #chimaera #research #marine #conservation #ISRA Thanks to the Shark Conservation Fund
Read the full paper in the journal iScience here: doi.org/10.1016/j.is...
#shark #ray #chimaera #research #marine #conservation #ISRA Thanks to the Shark Conservation Fund
August 12, 2025 at 5:44 AM
NEW PAPER ALERT | Important Shark and Ray Areas can inform conservation planning in the Mediterranean and Black Seas
Read the full paper in the journal iScience here: doi.org/10.1016/j.is...
#shark #ray #chimaera #research #marine #conservation #ISRA Thanks to the Shark Conservation Fund
Read the full paper in the journal iScience here: doi.org/10.1016/j.is...
#shark #ray #chimaera #research #marine #conservation #ISRA Thanks to the Shark Conservation Fund
Reposted by Johann Mourier
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
❓Differences in reproductive strategies❓
🔗 doi.org/10.1002/ece3...
#SharkScience #Evolution #MarineBiology
July 22, 2025 at 8:21 AM
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
❓Differences in reproductive strategies❓
🔗 doi.org/10.1002/ece3...
#SharkScience #Evolution #MarineBiology
Reposted by Johann Mourier
Warming oceans a turn-off for female Critically Endangered sharks www.lancaster.ac.uk/news/warming...
Warming oceans a turn-off for female Critically Endangered sharks - Lancaster University
Critically Endangered female angelsharks (Squatina squatina) are changing normal mating routines in warming oceans as they prioritise staying cool over visiting breeding grounds when things get too…
www.lancaster.ac.uk
July 17, 2025 at 1:13 PM
Warming oceans a turn-off for female Critically Endangered sharks www.lancaster.ac.uk/news/warming...
Reposted by Johann Mourier
This paper from Israeli colleagues documents a recent fatal shark bite and provides management recommendations to reduce the chance of this happening in the future.
I don't think I've ever seen a paper completed and published so soon after something happens.
www.sciencedirect.com/science/arti...
I don't think I've ever seen a paper completed and published so soon after something happens.
www.sciencedirect.com/science/arti...
Fatal shark incident in the eastern Mediterranean Sea highlights urgent need for enhanced management measures
The aggregation of dusky sharks (Carcharhinus obscurus) and sandbar sharks (C. plumbeus) around coastal infrastructure in the eastern Mediterranean Se…
www.sciencedirect.com
July 16, 2025 at 6:26 PM
This paper from Israeli colleagues documents a recent fatal shark bite and provides management recommendations to reduce the chance of this happening in the future.
I don't think I've ever seen a paper completed and published so soon after something happens.
www.sciencedirect.com/science/arti...
I don't think I've ever seen a paper completed and published so soon after something happens.
www.sciencedirect.com/science/arti...
Little science art using my Wacom palette and software Krita
This is a painted comber (Serranus scriba) from the Mediterranean Sea
This is a painted comber (Serranus scriba) from the Mediterranean Sea
July 14, 2025 at 4:41 PM
Little science art using my Wacom palette and software Krita
This is a painted comber (Serranus scriba) from the Mediterranean Sea
This is a painted comber (Serranus scriba) from the Mediterranean Sea