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您的检索式：作者名="Eric J.GANGLOFF"
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| 1 | Effects of low-oxygen conditions on embryo growth in the painted turtle,Chrysemys picta显示文摘Low-oxygen conditions(hypoxia;<21%O_(2))are considered unfavorable for growth;yet,embryos of many vertebrate taxa develop successfully in hypoxic subterranean environments.Although enhanced tolerance to hypoxia has been demonstrated in adult reptiles,such as in the painted turtle(Chrysemys picta),its effects on sensitive embryo life stages warrant attention.We tested the hypothesis that short-term hypoxia negatively affects growth during day 40 of development in C.picta,when O_(2) demands are highest in embryos.A brief,but severe,hypoxic event(5%O_(2) for 0.5 h)moderately affected embryo growth,causing a 13%reduction in mass(relative to a normoxic control).The same condition had no effect during day 27;instead,a nearly anoxic event(1%O_(2) for 72 h)caused a 5%mass reduction.All embryos survived the egg incubation period.Our study supports the assumption that reptilian embryos are resilient to intermittently low O_(2) in subterranean nests.Further work is needed to ascertain responses to suboptimal O_(2) levels while undergoing dynamic changes in developmental physiology. | Gerardo A.CORDERO Matthew L.KARNATZ Jon C.SVENDSEN Eric J.GANGLOFF | 2017 | Integrative Zoology2017，12，2： | 1 |
| 2 | High-elevation hypoxia impacts perinatal physiology and performance in a potential montane colonizer显示文摘Climate change is generating range shifts in many organisms,notably along the elevational gradient in mountainous environments.However,moving up in elevation exposes organisms to lower oxygen availability,which may reduce the successful reproduction and development of oviparous organisms.To 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;i.e.normoxia at 436 m above sea level).Hatching success did not differ between the two treatments.Embryos 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 elevation.Furthermore,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 treatment.These 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 ovo.These early-life performance limitations imposed by extreme high elevation could have negative consequences on adult phenotypes,including on fitness-related traits. | 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 | 2020 | Integrative Zoology2020，15，6： | 0 |
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