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High-elevation hypoxia impacts perinatal physiology and performance in a potential montane colonizer

Integrative Zoology 2020年第6期15卷 544-557页

作者： Jérémie SOUCHET Eric J.GANGLOFF Gaëlle MICHELI Coralie BOSSU Audrey TROCHET Romain BERTRAND Jean CLOBERT Olivier CALVEZ Albert MARTINEZ-SILVESTRE Elodie DARNET Hugo LE CHEVALIER Olivier GUILLAUME Marc MOSSOLL-TORRES Laurent BARTHE gilles pottier HervéPHILIPPE Fabien AUBRET Station d’Ecologie Théorique et Expérimentale du Centre National de la Recherche Scientifique MoulisFrance Department of Zoology Ohio Wesleyan UniversityDelawareOhioUSA Catalonia Reptile and Amphibian Rescue Center(CRARC) MasquefaBarcelonaSpain Bomosa Pl.Parc de la MolaLes EscaldesAndorra Pirenalia EncampAndorra Nature En Occitanie ToulouseFrance Département de Biochimie Centre Robert-CedergrenUniversitéde MontréalMontréalCanada

Climate change is generating range shifts in many organisms,notably along the elevational gradient in mountainous ***,moving up in elevation exposes organisms to lower oxygen availability,which may reduce the successful reproduction and development of oviparous *** test this possibility in an upwardcolonizing species,we artificially incubated developing embryos of the viperine snake(Natrix maura)using a split-clutch design,in conditions of extreme high elevation(hypoxia at 2877 m above sea level;72%sea-level equivalent O2 availability)or low elevation(control group;*** at 436 m above sea level).Hatching success did not differ between the two *** developing at extreme high elevation had higher heart rates and hatched earlier,resulting in hatchlings that were smaller in body size and slower swimmers compared to their siblings incubated at lower ***,post-hatching reciprocal transplant of juveniles showed that snakes which developed at extreme high elevation,when transferred back to low elevation,did not recover full performance compared to their siblings from the low elevation incubation *** results suggest that incubation at extreme high elevation,including the effects of hypoxia,will not prevent oviparous ectotherms from producing viable young,but may pose significant physiological challenges on developing offspring in *** early-life performance limitations imposed by extreme high elevation could have negative consequences on adult phenotypes,including on fitness-related traits.

关键词： developmental plasticity embryonic metabolism high-elevation hypoxia locomotor performance Natrix maura

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