Christophe Dufresnes
banner
chrisdufresnes.bsky.social
Christophe Dufresnes
@chrisdufresnes.bsky.social
Amphibian researcher @isyeb.mnhn.fr @mnhn.fr
Sex, genes and speciation - Different chromosomes carrying famous genes determine males and females in common and spiny toads, driving their reproductive barriers. Hybrids, the battle of sex is on!

@isyeb.mnhn.fr @molbioevol.bsky.social
doi.org/10.1093/molb...
www.mnhn.fr/fr/alerte-pr...
June 20, 2025 at 8:27 PM
Reposted by Christophe Dufresnes
Une étude menée par @chrisdufresnes.bsky.social @isyeb.mnhn.fr vient de paraître dans la revue @molbioevol.bsky.social et révèle que ce sont des chromosomes différents qui déterminent le sexe chez le crapaud commun (Bufo bufo) & le crapaud épineux (Bufo spinosus)...
🐸 www.mnhn.fr/fr/alerte-pr...
XY contre ZW : la guerre des sexes chez les crapauds
Une étude menée par l’Institut de Systématique, Évolution, Biodiversité (MNHN, CNRS, Sorbonne Université, EPHE-PSL, Université des Antilles), publiée dans la revue Molecular Biology and Evolution, rév...
www.mnhn.fr
June 20, 2025 at 9:54 AM
Thanks to Mathieu Denoël for his massive review work on the invasion pathways of our marsh frogs! Those guys are so invasive that we take them for granted everywhere^^

www.sciencedirect.com/science/arti...
The alien marsh frog cocktail: Distribution, causes and pathways of a global amphibian invasion
While some biological invasions are well documented globally, others, more cryptic, are often underestimated despite multiple local warnings. This is …
www.sciencedirect.com
April 15, 2025 at 8:36 AM
Genetics or phenetics? Check out what best differentiates midwife toad taxa at various stage of their speciation continuum in our latest article freshly squeezed in Molecular Ecology with @batracofistro.bsky.social and many other co-authors!
onlinelibrary.wiley.com/doi/full/10....
March 25, 2025 at 3:54 PM
Reposted by Christophe Dufresnes
Dans #The_Science_of_Nature vol.112 (17) #OpenAccess
Une étude moléculaire sur des cuisses de grenouilles consommées en Suisse et mal étiquetées recèlent une biodiversité insoupçonnée.
Espèces d'origines diverses, exotiques,envahissantes ou inconnues des zoologistes!
#Amphibian #Biological_invasion
February 13, 2025 at 2:05 PM
Reposted by Christophe Dufresnes
🐍💉 Première femme médecin en France, spécialiste des animaux venimeux et féministe, Marie Phisalix est une pionnière.

Portrait de cette grande biologiste et féministe dont l’histoire est intimement liée au Muséum 👉 www.mnhn.fr/fr/marie-phi...

#JournéeInternationaleDesFemmesEtDesFillesDeScience
February 11, 2025 at 1:25 PM
Reposted by Christophe Dufresnes
Reposted by Christophe Dufresnes
Our study on Duttaphrynus melanostictus evolution published in Nature Communication. We showed how these toads likely spread across the Indian Ocean via human transport, from ancient trade routes to modern shipping. 🌍🐸
@chrisdufresnes.bsky.social
@naturecomms.bsky.social
@comeniusuni.bsky.social
February 1, 2025 at 6:34 PM
The long-awaited book "Status of Decline and Conservation of Amphibians of the Middle East" has just been released!

Happy to have helped out for one chapter on Syrian amphibians by Ahmad Aidek, Mudar Salimeh, Yaman Omran and Daniel Jablonski
link.springer.com/chapter/10.1...
The Composition, Distribution, and Endangerment of the Amphibian Fauna of Syria
Syria has a broad range of natural landscapes, including mountains, forests, rivers, lakes, and arid landscapes that promoted the diversification of its amphibian fauna. Syrian amphibians presently co...
link.springer.com
January 23, 2025 at 9:45 AM
Our phylogeography of Duttaphrynus melanostictus is finally out in @naturecomms.bsky.social

Check out its fancy patterns, such as a new species from SE-Asia and suspicions of historical human-mediated dispersal across the Indian Ocean:

www.nature.com/articles/s41...
January 8, 2025 at 9:35 AM