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Keywords: Trachemys scripta
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Journal Articles
Amanda Bundgaard, Anja V. Gruszczyk, Hiran A. Prag, Catherine Williams, Angela McIntyre, Ilan M. Ruhr, Andrew M. James, Gina L. J. Galli, Michael P. Murphy, Angela Fago
Journal:
Journal of Experimental Biology
J Exp Biol (2023) 226 (9): jeb245516.
Published: 10 May 2023
... Highlighted Article: Low rates of mitochondrial O 2 · − production are responsible for lack of tissue damage upon reoxygenation after anoxia in turtles, likely owing to low succinate accumulation and low degradation of adenine nucleotides. Mitochondria Trachemys scripta Reverse electron transfer...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2019) 222 (12): jeb203976.
Published: 19 June 2019
... Trachemys scripta elegans , a species undergoing strong metabolic suppression when cold and anoxic. In warm normoxic turtles, free H 2 S was higher in red blood cells (RBCs) and kidney (∼9–10 µmol l −1 ) than in brain, liver and lung (∼1–2 µmol l −1 ). These values overall aligned with the tissue H 2 S...
Includes: Supplementary data
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2018) 221 (22): jeb182600.
Published: 14 November 2018
... the phenotypic consequences of elevated corticosterone during development, and characterizing the levels of maternally transferred corticosterone in unmanipulated eggs using Trachemys scripta . By dosing eggs with tritiated corticosterone and tracking the steroid throughout development, we found that most...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2016) 219 (22): 3616–3625.
Published: 15 November 2016
... and birds, do not maintain high arterial P O 2 during routine activities. Oxygen levels are highly variable and often increase rather than decline during underwater breath holds. Turtle Arterial P O 2 Trachemys scripta Cardiac shunt Blood oxygen depletion Diving Across air...
Includes: Supplementary data
Journal Articles
Humoral immune responses are maintained with age in a long-lived ectotherm, the red-eared slider turtle
Available to PurchaseLaura M. Zimmerman, Sandrine G. Clairardin, Ryan T. Paitz, Justin W. Hicke, Katie A. LaMagdeleine, Laura A. Vogel, Rachel M. Bowden
Journal:
Journal of Experimental Biology
J Exp Biol (2013) 216 (4): 633–640.
Published: 15 February 2013
... in the humoral immune system of the red-eared slider turtle, Trachemys scripta , which supports the idea that non-specific, natural antibody responses are an important line of defense in reptiles. Overall, this demonstrates that a taxon’s immune strategy can influence how the immune system is affected by age...
Journal Articles
Effects of extracellular changes on spontaneous heart rate of normoxia-and anoxia-acclimated turtles ( Trachemys scripta )
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2007) 210 (3): 421–431.
Published: 1 February 2007
...Jonathan A. W. Stecyk; Anthony P. Farrell SUMMARY Heart rate ( f H ) of the anoxia-tolerant freshwater turtle ( Trachemys scripta ) during prolonged anoxia exposure is 2.5-to 5-times lower than the normoxic rate, but whether alterations in blood composition that accompany prolonged anoxia...
Journal Articles
Negotiating brain anoxia survival in the turtle
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2004) 207 (18): 3141–3147.
Published: 15 August 2004
..., and molecular adaptations. In contrast to the high vulnerability of the mammalian brain to hypoxia (as well as most other vertebrates), the brain of the freshwater turtle Trachemys scripta is able to withstand anoxia for days at room temperature ( Lutz et al.,2003a ; Bickler et al., 2002). Recent...
Journal Articles
Force development, energy state and ATP production of cardiac muscle from turtles and trout during normoxia and severe hypoxia
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2004) 207 (11): 1915–1924.
Published: 1 May 2004
... of Biologists Limited 2004 2004 oxygen consumption lactate production cellular energy state phosphorylation potential cost of contraction twitch force metabolic depression Trachemys scripta Oncorhynchus mykiss Freshwater turtles possess high hypoxia tolerance relating to their diving...
Journal Articles
The cardiovascular responses of the freshwater turtle Trachemys scripta to warming and cooling
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2004) 207 (9): 1471–1478.
Published: 1 April 2004
...Gina Galli; E. W. Taylor; Tobias Wang SUMMARY Seven freshwater turtles Trachemys scripta were instrumented with flow probes and cannulated for blood pressure measurements. The turtles were warmed from 24 to 34°C, and cooled down to 24°C, with and without atropine. Animals exhibited a hysteresis...
Journal Articles
α-Adrenergic regulation of systemic peripheral resistance and blood flow distribution in the turtle Trachemys scripta during anoxic submergence at 5°C and 21°C
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2004) 207 (2): 269–283.
Published: 15 January 2004
... resistance ( R sys ). Here,we investigate the role of the α-adrenergic system in modulating R sys during anoxia at 5°C and 21°C in the turtle Trachemys scripta , and also describe how anoxia affects relative systemic blood flow distribution(% Q̇ sys ) and absolute tissue blood flows. Turtles were...
Journal Articles
Adrenergic control of the cardiovascular system in the turtle Trachemys scripta
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2002) 205 (21): 3335–3345.
Published: 1 November 2002
...Johannes Overgaard; Jonathan A. W. Stecyk; Anthony P. Farrell; Tobias Wang SUMMARY Freshwater turtles, Trachemys scripta , like all non-crocodilian reptiles, are able to shunt blood between the pulmonary and systemic circulations owing to their undivided ventricle. The prevailing hypothesis...
Journal Articles
Acute and Chronic Influence of Temperature on Red Blood Cell Anion Exchange
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (2001) 204 (1): 39–45.
Published: 1 January 2001
...Frank B. Jensen; Tobias Wang; Jesper Brahm ABSTRACT Unidirectional 36 Cl − efflux via the red blood cell anion exchanger was measured under Cl − self-exchange conditions (i.e. no net flow of anions) in rainbow trout Oncorhynchus mykiss and red-eared freshwater turtle Trachemys scripta to examine...
Journal Articles
The cardiovascular responses of the red-eared slider ( Trachemys scripta ) acclimated to either 22 or 5 °C: I. Effects of anoxic exposure on in vivo cardiac performance
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Journal:
Journal of Experimental Biology
J Exp Biol (2000) 203 (24): 3765–3774.
Published: 15 December 2000
... ), systemic cardiac output (Q̇ sys ), heart rate ( f H ), systemic stroke volume ( V s,sys ), systemic resistance ( R sys ) and mean arterial pressure ( P sys ) in red-eared sliders ( Trachemys scripta ). The effects of cold acclimation and anoxic exposure were studied. Turtles were acclimated to either 22 °C...
Journal Articles
The Cardiovascular Responses of the Red-Eared Slider ( Trachemys Scripta ) Acclimated to Either 22 Or 5 °C: II. Effects of Anoxia on Adrenergic and Cholinergic Control
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Journal:
Journal of Experimental Biology
J Exp Biol (2000) 203 (24): 3775–3784.
Published: 15 December 2000
...J. M. T. Hicks; A. P. Farrell ABSTRACT Cardiovascular control in cold-acclimated freshwater turtles during chronic anoxic exposure is not well understood. We tested the hypothesis that the observed bradycardia in Trachemys scripta results from increased cholinergic inhibitory tone and reduced...
Journal Articles
Cardiorespiratory response to progressive hypoxia and hypercapnia in the turtle trachemys scripta
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Journal:
Journal of Experimental Biology
J Exp Biol (1999) 202 (22): 3205–3213.
Published: 15 November 1999
... 1999 blood flow ventilation reptile anoxia hypoxia hypercapnia turtle Trachemys scripta Semi-aquatic turtles are diving animals that exhibit an episodic breathing pattern similar to that of many other tetrapod lower vertebrates (see Shelton and Boutilier, 1982 ; Milsom, 1991...
Journal Articles
Exercise and forced submergence in the pond slider ( Trachemys scripta ) and softshell turtle ( Apalone ferox ): influence on bimodal gas exchange, diving behaviour and blood acid–base status
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Journal:
Journal of Experimental Biology
J Exp Biol (1999) 202 (3): 267–278.
Published: 1 February 1999
...B. Bagatto; R. P. Henry ABSTRACT The dynamics of bimodal respiration, diving behaviour and blood acid–base status in the softshell turtle Trachemys scripta and the pond slider Apalone ferox were investigated at rest and under conditions of stress induced by exercise and forced submergence. During...
Journal Articles
Hypoxia Elicits an Increase in Pulmonary Vasculature Resistance in Anaesthetised Turtles ( Trachemys Scripta )
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Journal:
Journal of Experimental Biology
J Exp Biol (1998) 201 (24): 3367–3375.
Published: 15 December 1998
... reptiles respond in a similar fashion. The present study describes the effects of altering lung oxygen levels (at a constant of 0.03) on systemic and pulmonary blood flows and pressures in anaesthetised (Nembumal, 50 mg kg −1 ) and artificially ventilated turtles Trachemys scripta . During severe hypoxia...
Journal Articles
The Effects of Artificial Lung Inflation on Pulmonary Blood Flow And Heart Rate In The Turtle Trachemys Scripta
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Journal:
Journal of Experimental Biology
J Exp Biol (1997) 200 (19): 2539–2545.
Published: 1 October 1997
... vascular blood flows, we examined the effect of manipulating lung volume (and therefore PSR stimulation) on blood flows and heart rate in the freshwater turtle Trachemys scripta . Turtles were instrumented with blood flow probes on the left aortic arch and the left pulmonary artery for measurements...
Journal Articles
Role for Adenosine in Channel Arrest in the Anoxic Turtle Brain
Available to Purchase
Journal:
Journal of Experimental Biology
J Exp Biol (1997) 200 (13): 1913–1917.
Published: 1 July 1997
... the hypothesis that extracellular adenosine plays a role in the reduction of K + flux (channel arrest) that occurs in the anoxic turtle brain. Changes in extracellular K + concentration ([K + ] o ) in the in situ brain of the turtle Trachemys scripta were monitored following inhibition of Na + /K + -ATPase...
Journal Articles
Effects of Inhibition of Nitric Oxide Synthesis and Of Hypercapnia on Blood Pressure and Brain Blood Flow in The Turtle
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Journal:
Journal of Experimental Biology
J Exp Biol (1997) 200 (4): 815–820.
Published: 15 February 1997
... vertebrates. Using epi-illumination microscopy in vivo to observe CBF velocity on the brain surface (cerebral cortex), we show that turtles ( Trachemys scripta ) exposed to hypercapnia (inspired ) displayed a 62 % increase in CBF velocity, while systemic blood pressure remains constant. Exposing turtles...
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