Intra- and inter-individual variability in the circadian rhythm of body temperature of rats, squirrels, dogs, and horses

Refinetti, Roberto; Piccione, Giuseppe

doi:10.1016/j.jtherbio.2004.09.003

Cited by 35 publications

(35 citation statements)

References 28 publications

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“…intersubject variabilities of mesor and amplitude in Standardbreds and Jumpers is a strong indication that the organization of TLA daily rhythm in these two breeds is characterized by greater accuracy of control within and between the individuals of a breed. This finding contrasts with that for rectal temperature in horses, where acrophase intrasubject and intersubject variabilities were not statistically different, suggesting that acrophase is a dependable parameter in the analysis of rectal temperature daily rhythm (Refinetti and Piccione, 2005). We observed higher intrasubject variability of acrophase and robustness of rhythm in Standardbreds and Jumpers in both experimental conditions.…”

Section: Discussioncontrasting

confidence: 99%

“…This practice rests on the assumption that intrasubject and intersubject variabilities are numerically equivalent (Refinetti and Piccione, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Differences were largely attributable to the amplitude size of movement related to size of animals (Piccione et al, 2011b). Little research has been conducted on intrasubject and intersubject variabilities of daily rhythms, except for activity rhythm studies performed on domestic mouse and Nile grass rat (Refinetti, 2006). Accordingly, we sought to investigate the TLA daily rhythm in horses of different breeds housed in individual boxes and paddocks, with the intent of focusing on intrasubject and intersubject variabilities.…”

Section: Introductionmentioning

confidence: 99%

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Intrasubject and intersubject variabilities in the daily rhythm of total locomotor activity in horses

Giannetto

Fazio

Assenza

et al. 2016

Journal of Veterinary Behavior

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Section: Discussioncontrasting

confidence: 99%

“…This practice rests on the assumption that intrasubject and intersubject variabilities are numerically equivalent (Refinetti and Piccione, 2005).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intrasubject and intersubject variabilities in the daily rhythm of total locomotor activity in horses

Giannetto

Fazio

Assenza

et al. 2016

Journal of Veterinary Behavior

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“…Animals have diurnal fluctuations in core temperature within their normal daily life of~0.5-0.7 C (Breen and Barrell 2002;Refinetti and Piccione 2005). The increases in core temperature, reported as a response of ergovaline intake, of 0.2-0.4 C, are within this normal circadian range.…”

Section: (4) Increased Core Body Temperaturementioning

confidence: 99%

Ergovaline, an endophytic alkaloid. 2. Intake and impact on animal production, with reference to New Zealand

Nicol

Klotz

2016

Anim. Prod. Sci.

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Abstract. On the basis of published reports, the daily intake of the alkaloid ergovaline from the consumption of endophyte-containing ryegrass in New Zealand ranges from 0.008 to 0.287 mg ergovaline/kg LW 0.75 .day. Most of the reports are based on the use of standard endophyte-containing ryegrass and, thus, it is difficult to disassociate the impact of ergovaline consumption from that of lolitrem B. However, physiological effects of ergovaline consumption, such as reduced circulating prolactin concentration, vasoconstriction and elevated core temperature, have been detected at fairly low ergovaline intake, whereas decreased feed intake, liveweight gain and milk production have not generally been observed in animals at an intake below 0.07 mg ergovaline/kg LW 0.75 .day. Intakes above this value represent only 17% of published values. There are insufficient data to suggest a threshold ergovaline intake associated with heat stress with animal-welfare implications. The relationship between published ergovaline intake and the corresponding ergovaline concentration in pasture is poor (R 2 = 0.48), but on average an intake of 0.07 ergovaline/kg LW 0.75 .day is associated with an ergovaline concentration in ryegrass of 0.70 mg/kg DM. About 16-18% of published ergovaline concentrations in ryegrass pasture exceed this value. The ergovaline concentration in ryegrass is greater in the basal parts of the plant than in the leaf and during the late summer-autumn than in spring. Animals grazing in the lower sward horizons (horizontal grazing plane) are more at risk of high ergovaline intake, although the reduction in grazing intake induced by grazing at low pasture height aids in limiting ergovaline intake. As pasture growth rates decline in late summer, supplementary feed may be used to maintain stocking rate and, if such feeds have zero ergovaline concentration, they serve to dilute the mean dietary ergovaline intake. Ergovaline-containing ryegrass pastures are widely used in New Zealand. It appears that farmers consider the risks of depressed animal production on these pastures to be less than the benefits ergovaline bestows through its deterrent effect of specific insect attack and thus greater survival and pasture persistence.

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“…Numerous technologies have been used to measure body temperature in mammals, such as subcutaneously implanted microchip transponders (Greer et al 2007), sensors implanted into the abdomen (Refinetti and Piccione, 2005;Miyazaki et al 2002) and ingestible temperature sensors (Angle and Gillette 2011). Another method of temperature measurement in cows utilized temperature loggers inserted into the vagina (Burdick et al 2011;Burfeind et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Application of Vaginal Temperature Measurement in Bitches

Maeder

Arlt

Burfeind

et al. 2012

Reprod Domestic Animals

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ContentsFinding innovative, non-invasive methods for continuously measuring body temperature minimizing human interference is important for accurate data collection. The objective of this study was to assess feasibility and accuracy of continuous body temperature measurements with loggers placed in the vaginal cavity of bitches. First, an in vitro experiment was performed to compare values obtained by temperature loggers (n = 26) to a calibrated liquid-in-glass thermometer. The mean differences between the two methods were low. Next, an in vivo experiment was performed using five healthy bitches, and values obtained by the vaginal loggers were compared to measurements collected rectally with digital thermometers. The results show that rectal and vaginal temperatures were correlated. The mean differences between rectal and vaginal temperatures were negligible. We conclude that the utilized temperature loggers provide accurate and reliable data.

show abstract

Intra- and inter-individual variability in the circadian rhythm of body temperature of rats, squirrels, dogs, and horses

Cited by 35 publications

References 28 publications

Intrasubject and intersubject variabilities in the daily rhythm of total locomotor activity in horses

Intrasubject and intersubject variabilities in the daily rhythm of total locomotor activity in horses

Ergovaline, an endophytic alkaloid. 2. Intake and impact on animal production, with reference to New Zealand

Application of Vaginal Temperature Measurement in Bitches

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