Phenotypic plasticity in the common snapping turtle ( Chelydra serpentina ) : Long - term 1 physiological effects of chronic hypoxia during embryonic development
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چکیده
Phenotypic plasticity in the common snapping turtle (Chelydra serpentina): Long-term 1 physiological effects of chronic hypoxia during embryonic development. 2 Oliver H. Wearing,1 John Eme,2 Turk Rhen,3 and Dane A. Crossley II4 3 Department of Biology, McMaster University, Hamilton, ON, Canada; Department of 4 Biological Sciences, California State University San Marcos, San Marcos, CA, USA; 5 Department of Biology, University of North Dakota, Grand Forks, ND, USA; 6 Department of Biological Sciences, University of North Texas, Denton, TX, USA. 7 8 9 Abbreviated title for running head: PHENOTYPIC PLASTICITY IN JUVENILE 10 SNAPPING TURTLE 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Address for reprint requests and other correspondence: D. A. Crossley II, University 32 of North Texas, Department of Biological Sciences, 1155 Union Circle, #305220, 33 Denton, TX 76203-5017, USA ([email protected]). 34 Articles in PresS. Am J Physiol Regul Integr Comp Physiol (November 25, 2015). doi:10.1152/ajpregu.00293.2015
منابع مشابه
Phenotypic plasticity in the common snapping turtle (Chelydra serpentina): long-term physiological effects of chronic hypoxia during embryonic development.
Studies of embryonic and hatchling reptiles have revealed marked plasticity in morphology, metabolism, and cardiovascular function following chronic hypoxic incubation. However, the long-term effects of chronic hypoxia have not yet been investigated in these animals. The aim of this study was to determine growth and postprandial O2 consumption (V̇o2), heart rate (fH), and mean arterial pressure ...
متن کاملEmbryonic common snapping turtles (Chelydra serpentina) preferentially regulate intracellular tissue pH during acid-base challenges.
The nests of embryonic turtles naturally experience elevated CO2 (hypercarbia), which leads to increased blood PCO2 and a respiratory acidosis, resulting in reduced blood pH [extracellular pH (pHe)]. Some fishes preferentially regulate tissue pH [intracellular pH (pHi)] against changes in pHe; this has been proposed to be associated with exceptional CO2 tolerance and has never been identified ...
متن کاملEmbryonic temperature influences juvenile temperature choice and growth rate in snapping turtles Chelydra serpentina.
Snapping turtles (Chelydra serpentina) demonstrate temperature-dependent sex determination (TSD): intermediate egg incubation temperatures (23-27 degrees C) produce males, while extreme temperatures produce females. Snapping turtles are also sexually dimorphic: adult males are typically larger than females. Previous researchers hypothesized that male-producing egg temperatures enhanced the grow...
متن کاملAn ontogenetic shift in the response of heart rates to temperature in the developing snapping turtle (Chelydra serpentina).
The affect of acute changes in temperature on heart rates was investigated for the first time in a developing reptile. Heart rates were determined early and late in incubation in snapping turtle (Chelydra serpentina) eggs. Late in incubation heart rates at any given temperature were lower than those observed early in incubation. The results of temperature switching experiments late in incubatio...
متن کاملTemperature-dependent sex determination modulates cardiovascular maturation in embryonic snapping turtles Chelydra serpentina.
We investigated sex differences in cardiovascular maturation in embryos of the snapping turtle Chelydra serpentina, a species with temperature-dependent sex determination. One group of eggs was incubated at 26.5°C to produce males. Another group of eggs was incubated at 26.5°C until embryos reached stage 17; eggs were then shifted to 31°C for 6 days to produce females, and returned to 26.5°C fo...
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تاریخ انتشار 2015