Mechanisms for the control of respiratory evaporative heat loss in panting animals

Robertshaw, David

doi:10.1152/japplphysiol.01380.2005

Cited by 153 publications

(128 citation statements)

References 37 publications

Supporting

Mentioning

117

Contrasting

Unclassified

Order By: Relevance

“…Loss of heat by utilization of the latent heat of vaporization of water is an important component of the spectrum of physio logical strategies available to species that control their body temperature in the face of variable thermal loads (Robertshaw, 2006). According to Mitlöhner et al (2002) heat stressed cattle could increase water and feed intake, stand rather than lie down, increase respiration rate and body temperature.…”

Section: Discussionmentioning

confidence: 99%

Effect of high temperature on growth performance of calves maintained in outdoor hutches

Brouček¹,

Kišac²,

Uhrinčať³

et al. 2008

J. Anim. Feed Sci.

View full text Add to dashboard Cite

The aim of this work was to evaluate effects of high temperature on the growth, feed intake and health condition of calves kept in individual hutches in southern Slovakia. We tested a hypothesis that the calf performance would be infl uenced by the season at birth, sire lineage and gender. Sixtythree Holstein calves were reared in individual hutches from the second day of life to weaning at the age of 8 weeks. The calves originated from 5 sires. All calves were divided according to the temperature period at birth. The effects of period were determined according to two patterns: in pattern A, a low temperature period 1 (LT1, from April 4 to June 11, 69 days), high temperature period (HT, from June 12 to September 14, 95 days) and low temperature period 2 (from September 15 to November 24, 70 days) were distinguished; in pattern B, the results obtained in the LT1 and LT2 periods were combined and compared with those found in HT period. The same conditions of nutrition were ensured. We recorded 62 summer days and 14 tropical days during HT. Sixty-six days with the THI value above 72.0 and twenty-six with the values higher than 78.0 were found. The calves born during the HT had the lowest body weight from the fi rst week to the weaning in the both patterns (P<0.05). These calves drank up the most of water to the weaning, and had the least intake of starter mixture (P<0.05).

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of high temperature on growth performance of calves maintained in outdoor hutches

Brouček¹,

Kišac²,

Uhrinčať³

et al. 2008

J. Anim. Feed Sci.

View full text Add to dashboard Cite

show abstract

“…MW have a dense dorsal pelage, and when lying in the daytime shade, they pant like other canids, tongue hanging out and dripping. Thermal panting is costly in water loss: up to 50 mL/h in 25 kg dogs at 40°C (Blatt et al, 1972); but paradoxically, it is an energy-neutral behavior (Robertshaw, 2006). Dogs (25 kg) began to secrete water from the nasal glands for panting at 30°C (Blatt et al, 1972), which is exactly the temperature at which MW cease activity (Figure 2.2).…”

Section: Resting Sitesmentioning

confidence: 99%

The Maned Wolves of Noel Kempff Mercado National Park

Emmons¹

2012

Smithsonian Contributions to Zoology

View full text Add to dashboard Cite

Smithsonian Institution Scholarly Press s m i t h s o n i a n c o n t r i b u t i o n s t o z o o l o g y • n u m b e r 6 3 9The Maned Wolves of Noel Kempff Mercado National Park Edited by Louise H. Emmons SerieS PublicationS of the SmithSonian inStitutionEmphasis upon publication as a means of "diffusing knowledge" was expressed by the first Secretary of the Smithsonian. In his formal plan for the Institution, Joseph Henry outlined a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This theme of basic research has been adhered to through the years by thousands of titles issued in series publications under the Smithsonian imprint, commencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: In these series, the Institution publishes small papers and full-scale monographs that report on the research and collections of its various museums and bureaus. The Smithsonian Contributions Series are distributed via mailing lists to libraries, universities, and similar institutions throughout the world.Manuscripts submitted for series publication are received by the Smithsonian Institution Scholarly Press from authors with direct affiliation with the various Smithsonian museums or bureaus and are subject to peer review and review for compliance with manuscript preparation guidelines. General requirements for manuscript preparation are on the inside back cover of printed volumes. For detailed submissions requirements and to review the "Manuscript Preparation and Style Guide for Authors," visit the Submissions page at www.scholarlypress.si.edu. s m i t h s o n i a n c o n t r i b u t i o n s t o z o o l o g y • n u m b e r 6 3 9The Maned Wolves of Noel Kempff Mercado National Park Chrysocyon brachyurus) for 10 years in Cerrado habitat of Noel Kempff National Park, Bolivia. Most data were collected by GPS-collar technology, which yielded over 37,000 locations in 27 collar deployments on 10 individuals. The eight chapters introduce the study area and methods (1) and describe daily and seasonal activity (2); movements and ranges (3); diet and energetics (4); social interactions and reproduction (5); disease exposure, morbidity and mortality (6); maned wolf conservation (7); and finally, we synthesize the results in an overview of maned wolf behavioral ecology, with hypotheses about the unique form and function of this atypical canid (8). Activity was temperature related and sharply nocturnal in the dry season but partly diurnal in the rainy season. Adult home ranges were 40-123 km 2 , with strong seasonal variations in land use. Maned wolves averaged 14 km/night travel in dry months and 7 km/night during wet months. Breeding pairs shared territories with contiguous borders, which did not overlap with neighboring pairs. Young females twice stayed until adulthood on natal territories, as presumed helpers, and a...

show abstract

“…IN MANY SPECIES of mammals and birds, an elevation in body temperature stimulates ventilation and increases evaporative heat loss for thermoregulation (the so-called panting response) (42). In 1905, Haldane (25) was the first to report that hyperthermia also increases ventilation in humans, and the recent review by White (53) suggested that the hyperthermic hyperventilatory response provides countercurrent cooling of blood perfusing the brain (selective brain cooling).…”

mentioning

confidence: 99%

Effect of hypohydration on hyperthermic hyperpnea and cutaneous vasodilation during exercise in men

Fujii

Honda²,

Hayashi³

et al. 2008

Journal of Applied Physiology

View full text Add to dashboard Cite

Nishiyasu T. Effect of hypohydration on hyperthermic hyperpnea and cutaneous vasodilation during exercise in men. J Appl Physiol 105: 1509-1518. First published September 11, 2008 doi:10.1152/japplphysiol.01206.2007.-We tested the hypothesis that, in humans, hypohydration attenuates hyperthermic hyperpnea during exercise in the heat. On two separate occasions, thirteen male subjects performed a fluid replacement (FR) and a no-fluid replacement (NFR) trial in random order. The subjects performed two bouts of cycle exercise (Ex1 and Ex2, 30 -60 min) at 50% peak oxygen uptake (V O2 peak) in 35°C separated by a 70-to 80-min rest period, during which they drank water containing 25 mosmol/l sodium in the FR trial but not the NFR trial. The drinking in the FR trial nearly restored the body fluid to the euhydrated condition, so that the body fluid status differed between the trials before Ex2 (the difference in plasma osmolality before Ex2 was 9.4 mosmol/kgH 2O; plasma volume was 7.6%, and body weight was 2.5%). The slopes of the linear relationships between ventilatory variables (minute ventilation, ventilatory equivalents for oxygen uptake and carbon dioxide output, tidal volume, respiratory frequency, and end-tidal CO 2 pressure) and esophageal temperature (Tes) did not significantly differ between Ex1 and Ex2, or between the FR and NFR trials. On the other hand, during Ex2 in the NFR trial, the Tes threshold for the onset of increased forearm vascular conductance (FVC) was higher, and the slope and peak values of the relationship between FVC and Tes were lower than during Ex1 in the NFR trial and during Ex2 in the FR trial. These findings suggest that hypohydration does not affect the hyperthermic hyperpnea during exercise, although it markedly attenuates the cutaneous vasodilatory response. thermoregulation; respiration; ventilation; skin circulation IN MANY SPECIES of mammals and birds, an elevation in body temperature stimulates ventilation and increases evaporative heat loss for thermoregulation (the so-called panting response) (42). In 1905, Haldane (25) was the first to report that hyperthermia also increases ventilation in humans, and the recent review by White (53) suggested that the hyperthermic hyperventilatory response provides countercurrent cooling of blood perfusing the brain (selective brain cooling). However, the mechanism and the physiological significance of this response in humans are not fully understood.Hayashi et al. (26) and Nybo and Nielsen (37) recently reported that during prolonged submaximal exercise [50 -57% peak oxygen uptake (V O 2 peak )] in the heat in humans, minute ventilation (V E) increases linearly with increasing esophageal temperature (T es ), but this ventilatory response appears independent of skin temperature (T sk ) and the rate of increase in core temperature (26). Such prolonged exercise in the heat usually leads to profuse sweating, which can lead to hypohydration. Indeed, body weight was reduced by 1.5% in Hayashi's study (unpublished data), and by 0.7% in Nybo and Ni...

show abstract

Mechanisms for the control of respiratory evaporative heat loss in panting animals

Cited by 153 publications

References 37 publications

Effect of high temperature on growth performance of calves maintained in outdoor hutches

Effect of high temperature on growth performance of calves maintained in outdoor hutches

The Maned Wolves of Noel Kempff Mercado National Park

Effect of hypohydration on hyperthermic hyperpnea and cutaneous vasodilation during exercise in men

Contact Info

Product

Resources

About