Quentin PETITJEAN
banner
qpetitjean.bsky.social
Quentin PETITJEAN
@qpetitjean.bsky.social
Researcher working on multiple stressors 🦠🌡️🛢️ & Intraspecific variability across biological levels mostly in 🐟🐝🐌
#ecotox

⚪ Dev. of the MoveR R package
➡️ https://qpetitjean.github.io/MoveR/

🌐🔗 https://qpetitjean.github.io/qpetitjean_distill/
Pinned
📣Want to know more about the role of data editors and how journals can improve data & code quality control in E&E?

Take a look at the new @sortee.bsky.social Guidelines:
👉 doi.org/10.32942/X24...

Glad to have contributed, with great leadership from @joelpick.bsky.social & @eivimeycook.bsky.social
Reposted by Quentin PETITJEAN
Our new paper offers an explanation for the universal law that "under carefully controlled conditions.... an animal behaves as it damn well pleases." We explore how stochastic mechanisms may play an underappreciated role in generating individuality. (1/7 🧵)

www.sciencedirect.com/science/arti...
Playing dice with behavior: drivers of stochastic individuality
Animal behavior is often viewed as stemming from predictable genetic and environmental factors. However, despite our best attempts to control genetic …
www.sciencedirect.com
November 10, 2025 at 6:32 PM
Reposted by Quentin PETITJEAN
‼️🚨My first PhD paper out in @methodsinecoevol.bsky.social

We built an automated camera system to detect plant–pollinator interactions (day & night) and compared networks from cameras vs. focal observations.

📜👉 doi.org/10.1111/2041...

@annatraveset.bsky.social
@imedea.bsky.social
October 31, 2025 at 11:55 AM
Reposted by Quentin PETITJEAN
🚨 Still two weeks to apply for the Project Researcher/ Postdoc position with us! #INRAE #EABX
DL 03.10.
We’re hiring a Project Researcher/ Postdoc to study long-term changes in estuarine fish communities across France.
-Analyze large-scale datasets
-Model biodiversity & body size trends
-Link community changes to global change & human pressures
FR: jobs.inrae.fr/ot-27373
EN: jobs.inrae.fr/en/ot-27374
Chargé-e de recherches : Changements à long terme dans les communautés de poissons estuariens
Vous serez accueilli-e au sein de l’Unité de Recherche Écosystèmes Aquatiques et Changements Globaux (UR EABX : https://eabx.bordeaux-aquitaine.hub.inrae.fr/qui-sommes-nous/l-unite-eabx), située à Cestas, près de Bordeaux. Cette unité de recherche fait partie du Centre INRAE Bordeaux–Nouvelle Aquitaine.Les recherches menées par l’UR EABX visent à fournir des connaissances, développer des méthodologies et améliorer des outils pour définir et comprendre l’état et la dynamique des écosystèmes aquatiques d’eau douce (estuaires, marais côtiers, lacs et rivières). Cela passe par l’évaluation des réponses de ces écosystèmes et de leurs espèces clés — en particulier les poissons diadromes, estuariens et marins euryhalins, ainsi que les plantes aquatiques — face à diverses pressions d’origine humaine (par exemple, la pêche, la fragmentation des habitats, la pollution, le changement climatique).L’équipe Fonctionnement et Restauration des Écosystèmes Estuariens et Populations Migratrices Amphihalines (FREEMA) conduit des recherches écologiques sur la réponse des communautés de poissons aux contraintes environnementales et aux pressions anthropiques locales et globales. Ces recherches se concentrent principalement sur la compréhension des liens entre la structure et la dynamique de ces communautés et le fonctionnement écologique global des écosystèmes sous contraintes environnementales. Des outils de bioindication sont largement utilisés au sein de l’unité pour réaliser des diagnostics écologiques. Par ailleurs, la restauration des écosystèmes aquatiques dégradés — notamment les estuaires et les habitats associés comme les zones humides — occupe une place croissante dans les activités de recherche de FREEMA.Nous recherchons un-e chercheur-se motivé-e (Ph.D.) pour rejoindre notre équipe dans le but d’évaluer les changements à long terme des communautés de poissons estuariens à grande échelle spatiale et temporelle. Le/la candidat(e) retenu(e) s’appuiera sur des jeux de données nationaux pour étudier comment la richesse spécifique et la répartition des tailles dans les communautés de poissons estuariens ont évolué au fil du temps et selon les gradients environnementaux. Un aspect clé de la recherche sera de relier ces changements observés aux évolutions environnementales et aux pressions anthropiques, telles que les variations de température, de salinité et d’activités humaines. Ce poste offre l’opportunité de contribuer à des recherches à fort impact à l’interface de l’écologie des communautés, de la biologie du changement global et des sciences de la conservation, apportant des connaissances cruciales pour la gestion et la préservation des écosystèmes estuariens.Vous serez plus particulièrement en charge de :Organiser et analyser de grands jeux de données complexes sur les communautés de poissons estuariens en FranceDévelopper et appliquer des modèles statistiques avancés pour évaluer les changements de richesse spécifique et de distribution des taillesInterpréter les résultats dans le contexte des gradients environnementaux et du changement globalPrésenter les résultats lors de conférences scientifiquesPréparer des manuscrits de haute qualité pour des revues internationales à comité de lecture
jobs.inrae.fr
September 19, 2025 at 8:14 AM
Reposted by Quentin PETITJEAN
Yesterday, we had the pleasure of listening to Dorothy Bishop emphasize the responsibility of editors during the 12th PCI Webinar! If you weren't able to join, you can catch her talk and the following Q&A session at this link: youtu.be/0NJ87tYE8_s
PCI Webinar-Dorothy Bishop-How negligent publishers subvert quality control in scientific publishing
youtu.be
September 19, 2025 at 1:34 PM
Reposted by Quentin PETITJEAN
From policy to practice: Progress towards #data- and #code-sharing in ecology and evolution
@asanchez-tojar.bsky.social #ProcB
@eivimeycook.bsky.social tell us more in our blog royalsociety.org/blog/2025/09...
September 19, 2025 at 2:17 PM
Reposted by Quentin PETITJEAN
📷 The 2025 SORTEE conference program is now online!

Visit sortee.org/upcoming/ to register and explore the exciting lineup of various sessions.

#SORTEE2025

If you know a great open science project, now is the time to nominate it for a SORTEE Award www.sortee.org/awards/
September 17, 2025 at 9:43 AM
Reposted by Quentin PETITJEAN
📣 Hot off the press at #ProcB!

🔍 Our study checked data/code-sharing policies in 275 eco/evo journals and compliance in Proc B (n=2,340) & Ecology Letters (n=571). Policies exist, but clarity and strictness vary, affecting reproducibility.

🔗 doi.org/10.1098/rspb...
September 17, 2025 at 6:30 AM
Reposted by Quentin PETITJEAN
SquidSim is the coolest package - it let's you build complex hierarchical data structures and then simulate data from the world you create. The best tool for doing proper power analyses and testing how well your models can uncover the 'truth'. I've been recommending it to everyone!
Interested in simulating the kind of data that you might commonly find in evolutionary and ecological studies?

Then we have the R package for you - squidSim!!

Check our new preprint:
ecoevorxiv.org/repository/v...
squidSim: a flexible R package for structured and reproducible simulations in Ecology and Evolutionary Biology
ecoevorxiv.org
September 15, 2025 at 5:08 PM
Reposted by Quentin PETITJEAN
Pour un format d'annonce plus officiel, ça se passe par ici : jobs.inrae.fr/ot-27415
Merci par avance à toutes celles et tous ceux qui diffuseront cette annonce à leurs bons étudiants en bioinfo / génomique / métagénomique.
Bonus #1: vivre à Toulouse!
Bonus #2: dégustation régulière de miels!
September 15, 2025 at 1:41 PM
📣Want to know more about the role of data editors and how journals can improve data & code quality control in E&E?

Take a look at the new @sortee.bsky.social Guidelines:
👉 doi.org/10.32942/X24...

Glad to have contributed, with great leadership from @joelpick.bsky.social & @eivimeycook.bsky.social
August 25, 2025 at 9:54 AM
Reposted by Quentin PETITJEAN
🚨Introducing the @sortee.bsky.social Guidelines for Data and Code Quality Control in Ecology and Evolutionary Biology🚨 doi.org/10.32942/X24...

Increasingly E&E journals are recruiting data editors. We provide standardised guidelines for journals with data editors and those wanting to recruit them 🧵
The SORTEE Guidelines for Data and Code Quality Control in Ecology and Evolutionary Biology
doi.org
August 15, 2025 at 12:57 PM
Reposted by Quentin PETITJEAN
🚨 Proceedings B is recruiting new Data Editors!
Join our editorial board to help ensure data/code transparency across biology.
🗓 Term: 3 yrs from Jan 2026
📩 Apply by 30 Sep 2025 with a 2-page CV + cover letter: proceedingsb@royalsociety.org
🔗 Info: jackbrand.work@gmail.com /dylan.ge.gomes@gmail.com
August 7, 2025 at 2:56 PM
Reposted by Quentin PETITJEAN
🎉New preprint!

"TADA! Simple guidelines to improve code sharing"

tinyurl.com/8rmnwjrk

We present simple guidelines to help researchers of all coding levels improve the transparency and reproducibility of their analytical code, TADA!

Transferable, Accessible, Documented, Annotated.
TADA! Simple guidelines to improve code sharing
ecoevorxiv.org
August 2, 2025 at 5:05 PM
Reposted by Quentin PETITJEAN
We are doing a Hackathon! 💻 Together with senior editor @nhcooper123.bsky.social , we'll be discussing and testing a protocol to check whether published data/code is actually reproducible... (1/2)
July 31, 2025 at 3:21 PM
Reposted by Quentin PETITJEAN
Last paper from my PhD at #EcolLett: dx.doi.org/10.1111/ele....

Using long-term data from European tit populations, we test three hypotheses to determine how urbanization affects phenotypic variation at different population levels.
#UrbanTitCollab #DiverCity #SPIBirds
July 25, 2025 at 1:32 PM
Reposted by Quentin PETITJEAN
PhD offer in our lab in Toulouse, France
"Integration of pedigrees and methods for demographic inference in livestock population genomics"
Supervision: Pierre Faux & Bertrand Servin
More information: jobs.inrae.fr/en/ot-25908
Integration of pedigrees and methods for demographic inference in livestock population genomics
Demographic inference is a central tool for reconstructing the genetic history of a population. Recently, several new approaches have brought this tool into a new era, that of the exhaustive use of whole-genome sequence. These approaches can be divided into two categories: demographic inference based on ancestral recombination graphs (ARGs1) and deep learning based inference2,3. However, without any other source of information, it is difficult to assess the actual degree of accuracy of these methods. In the case of livestock species, we usually have access to an additional information, rather unique and valuable, the pedigree over several generations. This set of relationships makes it possible to compare inferred demographic histories with the exact, albeit incomplete, history of the population.In this thesis project, we aim to use the pedigree information on the one hand, to assess the results obtained with the new approaches of demographic inference, and, on the other hand, to refine methods for ARG estimation. Therefore, we propose a research program divided into three main tasks: (i) to appropriate new approaches (ARG, deep learning) in demographic inference on goat and sheep datasets, (ii) to compare these approaches together, in particular to evaluate their inference of the effective size of a population in the light of genealogical information, and (iii) to integrate this information into the inference of ARGs.Kelleher, J. et al. Inferring whole-genome histories in large population datasets. Nature Genetics 51, 1330–1338 (2019).Schrider, D. R. & Kern, A. D. Supervised Machine Learning for Population Genetics: A New Paradigm. Trends in Genetics 34, 301–312 (2018).Korfmann, K., Gaggiotti, O. E. & Fumagalli, M. Deep learning in population genetics. Genome Biology and Evolution 15, evad008 (2023).You will be welcomed in the CHAMADE team (“CHAracterization and MAnagement of Diversity”) of the GenPhySE research unit (https://genphyse.inrae.fr/), located in the Occitanie-Toulouse research centre (31320, Castanet-Tolosan). The CHAMADE team is part of the “Diversity and Selection” scientific division of the research unit. The team is interested in methodological issues in the field of population genomics, genetic evaluation of livestock species and quantitative and evolutionary genetics. On deep learning approaches for demographic inference, collaboration is also planned with the BioInfo team from the Laboratoire Interdisciplinaire des Sciences du Numérique (LISN, Paris-Saclay University).
jobs.inrae.fr
June 16, 2025 at 1:45 PM
Reposted by Quentin PETITJEAN
Dreaming of a postdoc adventure with earwigs? ✨ Dive into insect behavior, parental care, social immunity, population genomics, microbiota, ecotoxicology, and many other exciting topics! Got a crazy or just a vague idea for a postdoc project: Let's chat and make it happen! 🌟 #Postdoc #Europe #earwig
Choose Science. Choose Europe.

A new Marie Skłodowska-Curie Actions Postdoctoral Fellowships 2025 call is now open.

With a budget of €404.3 million, it will support around 1,650 researchers from Europe and beyond.

Apply by 10 September → europa.eu/!fBTMgF
May 8, 2025 at 7:53 PM
Reposted by Quentin PETITJEAN
Wild to see our new pharmaceutical pollution and salmon migration paper in @science.org covered on @colbertlateshow.bsky.social!

Starts at 2:45 👉 www.youtube.com/watch?v=Cm4u...

Read the paper 👉 www.science.org/doi/10.1126/...

@jack-brand.bsky.social
April 18, 2025 at 3:55 PM
Reposted by Quentin PETITJEAN
🚨 ESEB 2025, here we come! 🚨
We're thrilled to announce our symposium:
"Enhancing Diversity & Transparency in Ecology & Evolution: Reliable Practices for Research & Organizations" 🌍✨
Featuring invited speakers:
🔹 Dr. Malgorzata (Losia) Lagisz
🔹 Dr. Joel Pick
📅 Aug 17-22, 2025 | 📍 Barcelona, Spain
April 18, 2025 at 12:49 PM
Reposted by Quentin PETITJEAN
First paper published in PCI in Ecotox and Env Chem, issued from the PhD of #Camilla_Drocco done in collaboration with #Anja_Coors from #ECT_Oekotoxikologie within the context of aristo.bio.uth.gr/index.php/ct... !

peercommunityjournal.org/articles/10....
Evaluating the effects of environmental disturbances and pesticide mixtures on N-cycle related soil microbial endpoints
peercommunityjournal.org
April 16, 2025 at 12:28 PM
I'm thrilled to share that I’ve just started a permanent position as a research scientist at the Bees & Environment unit @inrae-france.bsky.social !

I’ll be focusing on the transfers and effects of contaminants on wild bees 🐝.
#ecotoxicology #ecotox
#bees

Stay tuned for updates!
January 2, 2025 at 2:36 PM
Reposted by Quentin PETITJEAN
🚨SAVE THE DATE 🚨 The 17th Ecology & Behaviour is back at the CEFE!
Join us from August 11-15, 2025. Don't miss out!

Sign up here for updates: listes.services.cnrs.fr/wws/subscrib...
And, of course, follow us here! #ecobhvr2025
November 22, 2024 at 1:34 PM
Reposted by Quentin PETITJEAN
We recruit a research engineer to examine the potential impacts of an offshore solar farm on biofouling communities and fish early life-stages, through fieldwork (monitoring and sampling) and experimental (ecotoxicology) approaches.
emploi.cnrs.fr/Offres/CDD/U... (in FRENCH)
December 13, 2024 at 2:52 PM
Reposted by Quentin PETITJEAN
In 2020, we showed that studies published in ecological journals WITH a code-sharing policy showed a 21% reproducibility potential at max (Culina et al 2020, @plosbiology.bsky.social)

We've now investigated journals WITHOUT a code-sharing policy. The results are worrying.

📰 doi.org/10.32942/X21...
Code-sharing policies are associated with increased reproducibility potential of ecological findings
doi.org
December 10, 2024 at 7:38 AM
Reposted by Quentin PETITJEAN
Want to do a Marie Curie project on seabirds with us? We work on stressors, contaminants, physiology, aging, demography. Great fieldwork in Svalbard, Antarctica, French Guyana, France. Lab facilities (hormones, telomeres), biologging, long-term CMR program.
CEBC, France
@ecophycebc.bsky.social
December 8, 2024 at 12:28 PM