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Peer-reviewedCC BYJournal of Developmental Biology

Developmental Heterochronies and Dioxygen Constraints in Teleostean Fishes

  • Guillaume Lecointre1
  • Victor Robitaille1
  • Anatole Tailleur1
  • Lucas Royer2
  • Valentin Rineau3
  • Boris Rota4
  • Mehdi Thabet4
  • Dominique Chardard2
  • Fabrice Teletchea5,6
6 affiliations
  1. 1Équipe "Homologies", Institut de Systématique, Évolution, Biodiversité (ISYEB), UMR 7205 Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique, École Pratique des Hautes Études, Université des Antilles, Sorbonne Université, CP50, Muséum National d'Histoire Naturelle, 57 rue Cuvier, 75005 Paris, France.
  2. 2Équipe Diversification en Aquaculture Continentale, Laboratoire Animal et Agroécosystèmes (L2A), Faculté des Sciences et Technologies, Université de Lorraine, Entrée 1B, 4ème étage, BP 70239, 54506 Vandoeuvre-lès-Nancy, France.
  3. 3Centre de Recherche en Paléontologie-Paris (CR2P), UMR 7207 Centre National de la Recherche Scientifique, Muséum National d'Histoire Naturelle, Sorbonne Université, 4, Place Jussieu, Tour 46-56 5e étage, 75252 Paris, France.
  4. 4Recifathome, 6b rue des Prés-Chalots, 25220 Roche-lez-Beaupré, France.
  5. 5Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), UMR 7360 Université de Lorraine, Centre National de la Recherche Scientifique, Université de Lorraine, 15 Avenue du Charmois, 54500 Vandœuvre-lès-Nancy, France.
  6. 6Marine Ecosystems and Organisms Research Laboratory (MERSEA), University of Caen Normandy, Esplanade de la Paix, 14032 Caen, France.
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Abstract

It has been hypothesized that a lack of dioxygen could be the trigger of hatching. Here we address the question of whether developmental heterochronies could be an indirect way to study adaptation to lack of dioxygen. To answer this question, we aim to explore the potential of an original method which compares the relative rate of anatomical development across an extended set of 19 species using a hierarchical analysis of ontogenetic time. Then we compare heterochronic rates with the relative time at hatching and information about dioxygen availability. Pairwise independence between dioxygen richness, rate of development and relative time at hatching are all rejected at the 5% threshold. This suggests a link between these three variables, and provides consilient evidence for the hypothesis that lack of dioxygen is a trigger of hatching. A possible scenario is the following: hatching early relatively to developmental time (because of a lack of dioxygen) exposes larvae to predation, and concomitant accelerated early anatomical development could be the result of a selective constraint which consists of being able to escape predators. We conjecture that accelerated embryonic development might be linked to adaptation against predation in dioxygen-poor waters.

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Cite

BibTeXRIS
BibTeX
@article{lecointre2026developmental,
  title = {{Developmental Heterochronies and Dioxygen Constraints in Teleostean Fishes}},
  author = {Guillaume Lecointre and Victor Robitaille and Anatole Tailleur and Lucas Royer and Valentin Rineau and Boris Rota and Mehdi Thabet and Dominique Chardard and Fabrice Teletchea},
  journal = {Journal of Developmental Biology},
  year = {2026},
  month = oct,
  doi = {10.3390/jdb14040044},
  url = {https://hal.science/hal-05801302v1},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Developmental Heterochronies and Dioxygen Constraints in Teleostean Fishes
AU  - Guillaume Lecointre
AU  - Victor Robitaille
AU  - Anatole Tailleur
AU  - Lucas Royer
AU  - Valentin Rineau
AU  - Boris Rota
AU  - Mehdi Thabet
AU  - Dominique Chardard
AU  - Fabrice Teletchea
PY  - 2026
DA  - 2026/10/04
JO  - Journal of Developmental Biology
DO  - 10.3390/jdb14040044
UR  - https://hal.science/hal-05801302v1
AB  - It has been hypothesized that a lack of dioxygen could be the trigger of hatching. Here we address the question of whether developmental heterochronies could be an indirect way to study adaptation to lack of dioxygen. To answer this question, we aim to explore the potential of an original method which compares the relative rate of anatomical development across an extended set of 19 species using a hierarchical analysis of ontogenetic time. Then we compare heterochronic rates with the relative time at hatching and information about dioxygen availability. Pairwise independence between dioxygen richness, rate of development and relative time at hatching are all rejected at the 5% threshold. This suggests a link between these three variables, and provides consilient evidence for the hypothesis that lack of dioxygen is a trigger of hatching. A possible scenario is the following: hatching early relatively to developmental time (because of a lack of dioxygen) exposes larvae to predation, and concomitant accelerated early anatomical development could be the result of a selective constraint which consists of being able to escape predators. We conjecture that accelerated embryonic development might be linked to adaptation against predation in dioxygen-poor waters.
SN  - 2221-3759
ER  -