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Keywords: heart rate
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Journal Articles
J Exp Biol (2022) 225 (12): jeb244268.
Published: 22 June 2022
.... Exercising crabs exhibited transient scaphognathite slowing and progressive increases in heart rate, whereas emersed crabs exhibited persistent inhibition of ventilation and transient heart slowing. Upon return to seawater, all these rates increased above both control and treatment levels. Post-exercise...
Journal Articles
J Exp Biol (2022) 225 (9): jeb243922.
Published: 5 May 2022
...Ayaka Saito; Chihiro Kinoshita; Megumi Kawai; Takuya Fukuoka; Katsufumi Sato; Kentaro Q. Sakamoto ABSTRACT Diving bradycardia is a reduction in the heart rate mediated by the parasympathetic system during diving. Although diving bradycardia is pronounced in aquatic mammals and birds, the existence...
Includes: Supplementary data
Journal Articles
J Exp Biol (2022) 225 (Suppl_1): jeb243095.
Published: 8 March 2022
... effects of heavy water and temperature on the heart-rate of the turtle . Physiol. Zool. 10 , 71 - 83 . 10.1086/physzool.10.1.30151405 Bartholomew , G. A. and Tucker , V. A. ( 1963 ). Control of changes in body temperature, metabolism, and circulation by the agamid lizard...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (14): jeb242397.
Published: 26 July 2021
... in a tank with conspecifics or confined to individual respirometers. After tag implantation under anaesthesia, heart rate ( f H ) required 60 h to recover to a stable value in a holding tank. Subsequently, when undisturbed under control conditions (normoxia, 21°C), mean f H was always significantly lower...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (13): jeb238683.
Published: 5 July 2021
... in the ventricles of subordinate relative to dominant trout. However, collagen type I transcript and protein levels, and markers of collagen turnover were unaffected. Indicators of cardiac function, including ventricle passive stiffness and intrinsic heart rate ( f H ), similarly were unaffected. In vivo f H...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (8): jeb241067.
Published: 16 April 2021
...Jaakko Haverinen; Irina Dzhumaniiazova; Denis V. Abramochkin; Minna Hassinen; Matti Vornanen ABSTRACT Heat tolerance of heart rate in fish is suggested to be limited by impaired electrical excitation of the ventricle due to the antagonistic effects of high temperature on Na + ( I Na ) and K + ( I...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (1): jeb234096.
Published: 7 January 2021
... dives. We measured heart rate ( f H ) in six adult male bottlenose dolphins ( Tursiops truncatus ) spontaneously breathing at the surface to quantify the relationship between respiration and f H , and compared this with f H during submerged breath-holds. We found that dolphins exhibit a pronounced...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (17): jeb227736.
Published: 11 September 2020
... their mothers under sea ice and to the bathypelagic zone, respectively. Studies on oxygen utilization patterns and heart rates while diving are limited, but the data indicate that immature marine mammals have a limited capacity to regulate heart rate (and hence oxygen utilization) during breath-hold...
Journal Articles
J Exp Biol (2020) 223 (16): jeb225680.
Published: 20 August 2020
.... At these sites, temperature-induced source–sink mismatch can reduce AP frequency, resulting in low-pass filtering or a complete block of signal transmission. In principle, this hypothesis can explain a number of heat-induced effects, including reduced heart rate, reduced synaptic transmission between neurons...
Journal Articles
J Exp Biol (2020) 223 (13): jeb222893.
Published: 1 July 2020
... flat ) temperatures were recorded. Over 8 weeks of constant submersion, the mean T crit of high-zone mussels decreased by 1.07°C from baseline, but low-zone mussels' mean T crit was unchanged. High- and low-zone mussels' mean maximum heart rate (HR) and resting HR decreased ∼12 and 35%, respectively. T...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (8): jeb219501.
Published: 23 April 2020
... response was identified in terms of a faster return of heart rate to baseline values during the recovery period of the 10th session of restraint. The increase in blood pressure and the decrease in tail skin temperature were similar at the 1st and 10th session of restraint. Exposure to CVS, social isolation...
Journal Articles
J Exp Biol (2020) 223 (5): jeb211250.
Published: 11 March 2020
... the cardiovascular responses to progressive hypoxia in four high-altitude Andean duck species compared with four related low-altitude populations in North America, tested at their native altitude. Ducks were exposed to stepwise decreases in inspired partial pressure of O 2 while we monitored heart rate, O 2...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (2): jeb219337.
Published: 28 January 2020
.... Understanding such ontogenetic transitions in energy allocation has been difficult because collecting continuous data on energy costs in wild developing birds was previously largely impossible. Here, we continuously measured heart rate and fine-scale movements of 20 free-living juvenile white storks ( Ciconia...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (19): jeb208637.
Published: 2 October 2019
... drivers of diving and surfacing heart rate in cetaceans whose faces are always mostly submerged. Using two trained harbour porpoises instrumented with an ECG-measuring sound-and-movement tag (DTAG-3), we investigated the initiation and progression of bradycardia and tachycardia during apnoea and eupnoea...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (17): jeb208918.
Published: 5 September 2019
... stressors occur. Transgenerational inheritance Crude oil Epigenetics Hypoxia Larva Heart rate Environmental stressor Transgenerational epigenetic inheritance enables parent-to-offspring transfer of modified phenotypes without alteration of the genomic sequence. In its broadest...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (17): jeb203166.
Published: 3 September 2019
... in the ribbed mussel, Mytilus californianus , comparing populations from high and low sites in the intertidal zone where emersion duration leads to different mean daily heating rates. Two temperature-related cardiac variables were examined: (1) the critical temperature ( T crit ) at which heart rate (HR...
Journal Articles
J Exp Biol (2019) 222 (9): jeb194365.
Published: 2 May 2019
...Matthew J. H. Gilbert; Varsha Rani; Sean M. McKenzie; Anthony P. Farrell ABSTRACT Acute warming in fish increases heart rate ( f H ) and cardiac output to peak values, after which performance plateaus or declines and arrhythmia may occur. This cardiac response can place a convective limitation...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (6): jeb197434.
Published: 27 March 2019
... energy expenditure. Typically, energy expenditure is represented by a proxy such as heart rate, which adds substantive measurement error. With simulations and analysis of empirical data, we explore the possible effect of regression dilution on interpretations of energy management strategies. We conclude...
Journal Articles
J Exp Biol (2019) 222 (5): jeb197848.
Published: 12 March 2019
... pharmacological approach considering temporal circulatory changes during head-up body inclinations in unanaesthetised Boa constrictor . To do so, we analysed temporal changes in P A , heart rate ( f H ) and cardiac autonomic tone associated with 30 and 60 deg inclinations, before and after muscarinic blockade...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (19): jeb181008.
Published: 1 October 2018
... these areas. Here, we examined thermal limits, performances for heart rate and plasticity in metabolic rate of the intertidal shrimp Betaeus emarginatus from seven populations along its latitudinal range (∼3000 km). The distribution of this species encompass two breaks along the southeastern Pacific coast...