Embryonic and juvenile snakes ( Natrix maura , Linnaeus 1758) compensate for high elevation hypoxia via shifts in cardiovascular physiology and metabolism - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Experimental Zoology Part A: Ecological and Integrative Physiology Année : 2023

Embryonic and juvenile snakes ( Natrix maura , Linnaeus 1758) compensate for high elevation hypoxia via shifts in cardiovascular physiology and metabolism

Alicia Josserand
  • Fonction : Auteur
Elodie Darnet
  • Fonction : Auteur
Hugo Le Chevalier
  • Fonction : Auteur
Audrey Trochet
  • Fonction : Auteur
Romain Bertrand
Albert Martinez‐silvestre
  • Fonction : Auteur
Marc Mossoll‐torres
  • Fonction : Auteur
Gilles Pottier
  • Fonction : Auteur
Eric J Gangloff

Résumé

The colonization of novel environments requires a favorable response to conditions never, or rarely, encountered in recent evolutionary history. For example, populations colonizing upslope habitats must cope with lower atmospheric pressure at elevation, and thus reduced oxygen availability. The embryo stage in oviparous organisms is particularly susceptible, given its lack of mobility and limited gas exchange via diffusion through the eggshell and membranes. Especially little is known about responses of Lepidosaurian reptiles to reduced oxygen availability. To test the role of physiological plasticity during early development in response to high elevation hypoxia, we performed a transplant experiment with the viperine snake ( Natrix maura , Linnaeus 1758). We maintained gravid females originating from low elevation populations (432 m above sea level [ASL]—normoxia) at both the elevation of origin and high elevation (2877 m ASL—extreme high elevation hypoxia; approximately 72% oxygen availability relative to sea level), then incubated egg clutches at both low and high elevation. Regardless of maternal exposure to hypoxia during gestation, embryos incubated at extreme high elevation exhibited altered developmental trajectories of cardiovascular function and metabolism across the incubation period, including a reduction in late‐development egg mass. This physiological response may have contributed to the maintenance of similar incubation duration, hatching success, and hatchling body size compared to embryos incubated at low elevation. Nevertheless, after being maintained in hypoxia, juveniles exhibit reduced carbon dioxide production relative to oxygen consumption, suggesting altered energy pathways compared to juveniles maintained in normoxia. These findings highlight the role of physiological plasticity in maintaining rates of survival and fitness‐relevant phenotypes in novel environments.
Fichier principal
Vignette du fichier
J Exp Zool Pt A - 2023 - Souchet - Embryonic and juvenile snakes Natrix maura Linnaeus 1758 compensate for high.pdf (958.31 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04269355 , version 1 (03-11-2023)

Licence

Domaine public

Identifiants

Citer

Jérémie Souchet, Alicia Josserand, Elodie Darnet, Hugo Le Chevalier, Audrey Trochet, et al.. Embryonic and juvenile snakes ( Natrix maura , Linnaeus 1758) compensate for high elevation hypoxia via shifts in cardiovascular physiology and metabolism. Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, 2023, 339 (10), pp.1102-1115. ⟨10.1002/jez.2756⟩. ⟨hal-04269355⟩
31 Consultations
16 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More