Basal oxygen consumption, ventilatory frequency, and heart rate during the protracted spawning run of the Southern Hemisphere lamprey Geotria australis

1991 ◽  
Vol 161 (5) ◽  
Author(s):  
D.J. Macey ◽  
L.M. Clarke ◽  
I.C. Potter
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Southern Hemisphere ◽  
Ventilatory Frequency ◽  
Geotria Australis ◽  
Spawning Run

scholarly journals Oxygen consumption, ventilatory frequency and heart rate of lampreys (Lampetra fluviatilis) during their spawning run

1975 ◽  
Vol 63 (1) ◽  
pp. 193-206
Author(s):  
P. N. Claridge ◽  
I. C. Potter
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Upstream Migration ◽  
Lampetra Fluviatilis ◽  
Ventilatory Frequency ◽  
The Hours ◽  
Rate Of Oxygen Consumption ◽  
Standard Rate ◽  
Spawning Run ◽  
Logarithmic Relationship

1. The standard rate of oxygen consumption, ventilatory frequency and heart rate of adult Lampetra fluviatilis were measured during the light phase of the photoperiod and at times corresponding to various stages in the upstream migration. 2. All three parameters increased during the spawning run but only in mature individuals were significant differences found between the sexes. 3. The regression coefficients for the logarithmic relationship between oxygen consumption and body weight of immature animals were 0.912 and 0.925 at 9.5 and 16 degrees C respectively. 4. Both the standard rate of oxygen consumption and the amount of oxygen taken up during activity increased greatly during the hours of darkness. 5. Oxygen consumption, ventilatory frequency and, to a lesser extent, heart rate increased significantly at 9.5 degrees C over the 100–20% range of saturation with air. 6. Below 20% saturation with air, lampreys no longer remained attached by their oral disc for prolonged periods and the ventilatory frequency rose even more rapidly to reach a maximum of 175 beats/min at 12.5%. Exposure to 7.5% resulted in death within 5–8 h.

scholarly journals The Influence of Hyperoxia, Hypoxia and Temperature on the Respiratory Physiology of the Intertidal Rockpool Fish Gobius Cobitis Pallas

1987 ◽  
Vol 130 (1) ◽  
pp. 368-387 ◽  
Author(s):  
P. BERSCHICK ◽  
C. R. BRIDGES ◽  
M. K. GRIESHABER
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Daily Basis ◽  
Respiratory Physiology ◽  
Q10 Value ◽  
Ventilation Frequency ◽  
Ventilatory Frequency ◽  
Hyperoxic Exposure ◽  
Critical Oxygen ◽  
Stepwise Reduction

The influence of hypoxia, hyperoxia and temperature on the oxygen consumption, heart rate and ventilation frequency of the intertidal rockpool fish Gobius cobitis Pallas were investigated to examine the respiratory adaptations of this species to intertidal conditions. The standard mass-specific oxygen consumption (MOO2 × m−1) during normoxia, calculated for a 50-g fish, averaged 1.27 mmol O2kg−1h−1 at 12.5°C and 3.62mmol O2kg−1h−1 at 25°C. The Q10 value for oxygen consumption averaged 2.3. During a stepwise reduction of oxygen partial pressure (POO2) the oxygen consumption was maintained down to a critical oxygen tension, Pc, of approximately 43 Torr (1 Torr = 133.3 Pa). Ventilatory frequency increased progressively while heart rate remained constant until the POO2 was reduced below 16 Torr. During hyperoxic exposure (POO2 = 150–450 Torr), oxygen consumption remained constant at 12.5 and at 25°C (Q10 = 2.3). Hyperoxia had no effect on heart rate, although ventilation frequency decreased with increasing POO2 (to the same extent at both temperatures), indicating the overriding effect of hyperoxia on ventilatory frequency. Gobius cobitis appears to be well-adapted to the respiratory stresses which occur on a daily basis within intertidal rockpools.

CARDIORESPIRATORY SYSTEM UNDER BICYCLE ERGOMETER TEST IN SKIERS WITH DIFFERENT TRAINING STATUS (KOMI REPUBLIC)

2019 ◽  
pp. 76-84
Author(s):  
Yu.G. Solonin ◽  
T.P. Loginova ◽  
I.O. Garnov ◽  
A.L. Markov ◽  
A.A. Chernykh ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Komi Republic ◽  
Rate Pressure Product ◽  
Training Status ◽  
Maximum Oxygen Consumption ◽  
Bicycle Ergometry ◽  
Cardiorespiratory System ◽  
Unit Pulse ◽  
Ski Racers

The aim of the study is to examine the impact of training status on ski racers (Komi Republic) at rest and under bicycle ergometry evaluating their cardiorespiratory system parameters. Materials and Methods. The authors examined male ski racers with different training status: 22 first-rank sportsmen, 22 candidates for Master of Sports and 22 Masters of Sports. Athletes underwent bicycle ergometry loads up to refusal. Oxycon Pro system (Germany) was used. Then authors studied the complex of cardiorespiratory parameters, calculating maximum oxygen consumption and unit physiological cost. Results. At rest and under standard physical load (200 W) Masters of Sports demonstrate significantly increased training status among ski racers in such cardiorespiratory system parameters as heart rate, rate pressure product and oxygen pulse. Under standard physical load (200 W) statistically significant differences between first-rank sportsmen and candidates for Master of Sports are detected by heart rate, rate pressure product, respiration rate, respiratory minute volume and oxygen utilization coefficient. Such deviations indicate differences in training status. Under maximum load, the highest training status is found in Masters of Sports: bicycle ergometry load power and duration; unit pulse, pressor and cardiac cost, bulk and unit values of maximum oxygen consumption. Heart rate values, unit pulse and heart-vent cost indicate a high training status in candidates for Master of Sports under load up to refusal, if compared with first-rank sportsmen. Athletes’ organism under load up to refusal works more efficiently than under moderate load (200 W). The training status in ski racers (Komi Republic) is manifested in the saving cardiorespiratory system functions, both at rest and under standard bicycle ergometry, as well as in parameters of unit physiological cost under loads up to refusal and increased values of maximum oxygen consumption. Keywords: ski racers, Komi Republic, training status, bicycle ergometry loads, cardiorespiratory system, maximum oxygen consumption.

Oxygen Consumption, Heart Rate, and Blood Lactate Responses to an Acute Bout of Plyometric Depth Jumps in College-Aged Men and Women

2010 ◽  
Vol 24 (9) ◽  
pp. 2475-2482 ◽  
Author(s):  
Gregory A Brown ◽  
Michael W Ray ◽  
Bryce M Abbey ◽  
Brandon S Shaw ◽  
Ina Shaw
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Blood Lactate ◽  
Acute Bout ◽  
Men And Women

Accuracy of the Heart Rate Index Equation to Assess Oxygen Consumption in Obese Patients

2014 ◽  
Vol 46 ◽  
pp. 169-170
Author(s):  
Roger L. Sacks ◽  
Barry Franklin ◽  
Judy Boura ◽  
James Van Loon
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Obese Patients

alpha-Adrenergic control of oxygen delivery to myocardium during exercise in conscious dogs

1982 ◽  
Vol 242 (5) ◽  
pp. H805-H809 ◽  
Author(s):  
G. R. Heyndrickx ◽  
P. Muylaert ◽  
J. L. Pannier
Keyword(s):  
Heart Rate ◽  
Blood Flow ◽  
Oxygen Consumption ◽  
Coronary Blood Flow ◽  
Coronary Sinus ◽  
Oxygen Delivery ◽  
Left Ventricular ◽  
Conscious Dogs ◽  
Adrenergic Blockade ◽  
Adrenergic Control

alpha-Adrenergic control of the oxygen delivery to the myocardium during exercise was investigated in eight conscious dogs instrumented for chronic measurements of coronary blood flow, left ventricular (LV) pressure, aortic blood pressure, and heart rate and sampling of arterial and coronary sinus blood. After alpha-adrenergic receptor blockade a standard exercise load elicited a significantly greater increase in heart rate, rate of change of LV pressure (LV dP/dt), LV dP/dt/P, and coronary blood flow than was elicited in the unblocked state. In contrast to the response pattern during control exercise, there was no significant change in coronary sinus oxygen tension (PO2), myocardial arteriovenous oxygen difference, and myocardial oxygen delivery-to-oxygen consumption ratio. It is concluded that the normal relationship between myocardial oxygen supply and oxygen demand is modified during exercise after alpha-adrenergic blockade, whereby oxygen delivery is better matched to oxygen consumption. These results indicate that the increase in coronary blood flow and oxygen delivery to the myocardium during normal exercise is limited by alpha-adrenergic vasoconstriction.

Respiratory Metabolism During Pregnancy in the Guinea Pig

1957 ◽  
Vol 190 (3) ◽  
pp. 425-428 ◽  
Author(s):  
Richard M. Hoar ◽  
William C. Young
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Guinea Pig ◽  
Metabolic Rate ◽  
Adrenal Cortex ◽  
Guinea Pigs ◽  
Sharp Decrease ◽  
Zona Fasciculata ◽  
Respiratory Metabolism ◽  
Morphological Differences

Oxygen consumption and heart rate during pregnancy were measured in untreated, thyroxin-injected and thyroidectomized guinea pigs given I131. From impregnation until parturition, oxygen consumption increased 7.9% in untreated females. The increase continued until 5 days postpartum when a sharp decrease occurred. The increase is not accounted for by growth of the fetal mass. Comparable increases occurred in thyroxin-injected (16.2%) and thyroidectomized (11.9%) females, although the levels throughout were higher and lower, respectively, than in intact females. Heart rate did not increase. On the contrary, statistically significant decreases occurred in the untreated and thyroxin-injected females. Although the mechanism associated with the increased metabolic rate is not known, the possibility of thyroid participation would seem to be excluded. Involvement of the adrenal cortex is suggested by morphological differences in the cells of the zona fasciculata in pregnant and nonpregnant females and by evidence cited from other studies.

The validity of the use of heart rate in estimating oxygen consumption in static and in combined static/dynamic exercise

Ergonomics ◽  
1989 ◽  
Vol 32 (2) ◽  
pp. 141-148 ◽  
Author(s):  
S. MAAS ◽  
M. L. J. KOK ◽  
H. G. WESTRA ◽  
H. C G. KEMPER
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Dynamic Exercise

Effect of exercise on oxygen consumption, heart rate, and the electrocardiogram of pigs

1984 ◽  
Vol 16 (4) ◽  
pp. 406???410 ◽  
Author(s):  
FRANK M. FARACI ◽  
STEVEN C. OLSEN ◽  
HOWARD H. ERICKSON
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption
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