Respiratory responses to short term hypoxia in the snapping turtle, Chelydra serpentina

Frische, Sebastian; Fago, Angela; Altimiras, Jordi

doi:10.1016/s1095-6433(00)00201-4

Cited by 23 publications

(24 citation statements)

References 28 publications

(29 reference statements)

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“…2A) was similar to values previously reported (Frische et al, 2000) but lower than when these turtles were studied at the same temperature (30°C) at 3 years old (∼33 beats min −1 ) in our previous study (Wearing et al, 2016). Although not the primary focus of this investigation, the difference in fasted f H of N21 turtles between the two studies may be a consequence of body mass differences (1.32±0.20 kg at 3 years old versus 3.53±0.37 kg at 5 years old).…”

Section: Fasted Measurementssupporting

confidence: 92%

Embryonic hypoxia programmes postprandial cardiovascular function in adult common snapping turtles (Chelydra serpentina)

Wearing

Conner

Nelson

et al. 2017

Journal of Experimental Biology

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Reduced oxygen availability (hypoxia) is a potent stressor during embryonic development, altering the trajectory of trait maturation and organismal phenotype. We previously documented that chronic embryonic hypoxia has a lasting impact on the metabolic response to feeding in juvenile snapping turtles (Chelydra serpentina). Turtles exposed to hypoxia as embryos [10% O 2 (H10)] exhibited an earlier and increased peak postprandial oxygen consumption rate, compared with control turtles [21% O 2 (N21)]. In the current study, we measured central blood flow patterns to determine whether the elevated postprandial metabolic response in H10 turtles is linked to lasting impacts on convective transport. Five years after hatching, turtles were instrumented to quantify systemic ( _ Q sys ) and pulmonary ( _ Q pul ) blood flows and heart rate ( f H ) before and after a ∼5% body mass meal. In adult N21 and H10 turtles, f H was increased significantly by feeding. Although total stroke volume (V S,tot ) remained at fasted values, this tachycardia contributed to an elevation in total cardiac output ( _ Q tot ). However, there was a postprandial reduction in a net left-right (L-R) shunt in N21 snapping turtles only. Relative to N21 turtles, H10 animals exhibited higher _ Q sys due to increased blood flow through the right systemic outflow vessels of the heart. This effect of hypoxic embryonic development, reducing a net L-R cardiac shunt, may support the increased postprandial metabolic rate we previously reported in H10 turtles, and is further demonstration of adult reptile cardiovascular physiology being programmed by embryonic hypoxia.

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Section: Fasted Measurementssupporting

confidence: 92%

Embryonic hypoxia programmes postprandial cardiovascular function in adult common snapping turtles (Chelydra serpentina)

Wearing

Conner

Nelson

et al. 2017

Journal of Experimental Biology

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“…At this point, the probability of further sexual behaviour is very low, but would be expected to increase with time. The breathing patterns of right whales (Winn et al, 1995) and snapping turtles (Frische et al, 2000) are further example of behaviours that occur in bouts. The length of the non-breathing interval between bouts also seems to be related to satiety-like principles.…”

Section: Discussionmentioning

confidence: 99%

The use of Mixed Distribution Models to Determine Bout Criteria for Analysis of Animal Behaviour

Yeates

Tolkamp

Allcroft

et al. 2001

Journal of Theoretical Biology

112

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“…Because of the widely observed low frequency of very short intervals, log e -survivorship analysis for RIs of cetaceans are quite likely unsuitable. Besides, since Frische et al (2000) also disputed the validity of the assumption of the underlying Poisson process when analyzing RIs of snapping turtles, further attention should be given to the suitability of log esurvivorship technique for the analyses of respiratory pattern of air-breathing aquatic animals.…”

Section: Discussionmentioning

confidence: 99%

“…The method is based on the assumption that the intra-and inter-bout intervals are produced by Poisson processes with different coefficients of rate, hence the survivorship can be described as the mixture of two negative exponential distributions, and the log esurvivorship curve is in the form of a broken-stick (Slater and Lester 1982). However, the assumption of the underlying Poisson processes and the corresponding negative exponential distributions for this technique are not always met, where the method could not be successfully applied (Tolkamp et al 1998;Tolkamp and Kyriazakis 1999;Frische et al 2000). Alternatively, in the analysis of cow feeding behavior, Tolkamp et al (1998) log e -transformed the feeding intervals and then fitted the frequency distribution with a two-Gaussian mixture model, resulting in a good fit and a biologically significant bout criterion.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, in the analysis of cow feeding behavior, Tolkamp et al (1998) log e -transformed the feeding intervals and then fitted the frequency distribution with a two-Gaussian mixture model, resulting in a good fit and a biologically significant bout criterion. Frische et al (2000) also applied this technique in the analysis of the respiration of snapping turtles (Chelydra serpentina).…”

Section: Introductionmentioning

confidence: 99%

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Respiratory pattern of captive Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis)

Xiao

Wang

2006

J Ethol

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Cetacean respiration usually happen in bouts. The most widely applied quantitative method used to analyze the structure of these bouts is the log e -survivorship analysis, based on the assumption that the respiratory intervals are distributed as negative exponentials. However, for the data collected from three captive Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis), we failed to obtain a convergent result with the application of log esurvivorship analysis. However, the two-Gaussian model, which was recently proposed to analyze the feeding behavior of cows, was successfully fitted to the data. According to the fitting results, the overall respiratory pattern of the captive Yangtze finless porpoises can be described as a dive with a mean duration of around 30-40 s, followed by two or three ventilations with a mean interval of approximately 9 s. The average intra-bout intervals during both active and inactive periods are constant at 7.7-9.9 s for all individuals. However, when shifting from active to inactive states, the adult male and female decrease their mean numbers of respirations per bout and average length of inter-bout respiratory intervals, while the estimates of both parameters increase for the juvenile female. It was pointed out that the two-Gaussian model might be more adequate for cetacean respiratory-bout structure analyses than the log e -survivorship technique.

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Respiratory responses to short term hypoxia in the snapping turtle, Chelydra serpentina

Cited by 23 publications

References 28 publications

Embryonic hypoxia programmes postprandial cardiovascular function in adult common snapping turtles (Chelydra serpentina)

Embryonic hypoxia programmes postprandial cardiovascular function in adult common snapping turtles (Chelydra serpentina)

The use of Mixed Distribution Models to Determine Bout Criteria for Analysis of Animal Behaviour

Respiratory pattern of captive Yangtze finless porpoises (Neophocaena phocaenoides asiaeorientalis)

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