Variations horaires de la température rectale et de la prolactinémie chez le « Cabrit créole » maintenu à l'extérieur en milieu tropical

Chemineau, Philippe; Ravault, J.P.

doi:10.1051/rnd:19840108

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…The relationships withT a had the greater correlation with T core . This superior relationship is consistent with previous research (Chemineau and Ravault 1984). In a study conducted by Dikmen and Hansen (2009), the authors compared eight different THI equations and other meteorological variables (wind speed, T a , RH) to determine which best predicted rectal temperature of lactating cows.…”

Section: Discussionsupporting

confidence: 71%

Determinants of bovine thermal response to heat and solar radiation exposures in a field environment

et al. 2010

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Continuous exposure of cattle to summer heat in the absence of shade results in significant hyperthermia and impairs growth and general health. Reliable predictors of heat strain are needed to identify this condition. A 12-day study was conducted during a moderate summer heat period using 12 Angus x Simmental (Bos taurus) steers (533± 12 kg average body weight) to identify animal and ambient determinations of core body temperature (T core ) and respiration rate (RR) responses to heat stress. Steers were provided standard diet and water ad libitum, and implanted intraperitoneally with telemetric transmitters to monitor T core hourly. Visual count of flank movement at 0800 and 1500 hours was used for RR. Dataloggers recorded air temperature (T a ), and black globe temperatures (T bg ) hourly to assess radiant heat load. Analysis was across four periods and 2 consecutive days averaged within each period. Average T a and T bg increased progressively from 21.7 to 30.3°C and 25.3 to 34.0°C, respectively, from the first to fourth periods. A model utilizing a quadratic function of T a explained the most variation in T core (R 2 =0.56). A delay in response from 1 to 3 h did not significantly improve R 2 for this relationship. Measurements at 0800 and 1500 hours alone are sufficient to predict heat strain. Daily minimum core body temperature and initial 2-h rise in T a were predictors of maximum core temperature and RR. Further studies using continuous monitoring are needed to expand prediction of heat stress impact under different conditions.

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Section: Discussionsupporting

confidence: 71%

Determinants of bovine thermal response to heat and solar radiation exposures in a field environment

et al. 2010

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“…Such correlations may indicate that a decrease in minimal temperature and in maximal hygrometry (which are two measurements registered during the night) could allow a better dissipation of the heat load received during the day. A recent study in the same breed indicated that rectal temperatures were reduced when both minimal air temperature and maximal hygrometry were low (Chemineau and Ravault, 1984). In the ewe, a decrease in the heat load before oestrus time induced changes in rectal temperatures and the reapparance of oestrus, or increased duration of oestrous behaviour (Sawyer, 1983).…”

mentioning

confidence: 99%

Sexual behaviour and gonadal activity during the year in the tropical Creole meat goat. I. Female oestrous behaviour and ovarian activity

Chemineau¹,

Varo²,

Grudé³

1986

Reprod. Nutr. Dévelop.

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“…We were particularly interested in the time required to develop a heat-loss mechanism and the time-lag in prolactin hypersecretion. (Berbigier, 1982 ;Chemineau and Ravault, 1984 11.40 ; P < 0.001), RR (98 ± 22 at 13.00 vs 35 ± 3 insp/min at 11.40 ; P < 0.01) and cortisol (17.7 ± 8.61 at 12.10 vs 5.57 ± 1.67 ng/ml at 12.00 ; P < 0.05) was observed.…”

mentioning

confidence: 95%

The effect of sudden solar exposure on thermophysiological parameters and on plasma prolactin and cortisol concentrations in male Creole goats

Sergent¹,

Berbigier²,

Kann³

et al. 1985

Reprod. Nutr. Dévelop.

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Summary. Rectal temperature (RT), respiratory rhythm (Rlil, plasma cortisol and prolactin (PRL) levels and haematocrit were measured at noon in male Creole goats during their habituation to shade, during sudden exposure to sunlight and then while they were kept outdoors. Data on the microclimatic environment, especially black-globe temperature (Tg), were recorded.On the day (DO) the bucks were put in the sun, the increase of RT Introduction.

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Variations horaires de la température rectale et de la prolactinémie chez le « Cabrit créole » maintenu à l'extérieur en milieu tropical

Abstract: Summary. Hourly variations in the rectal temperature and plasma prolactin levels of « creole goats u kept outdoors in a tropical environment.

Cited by 11 publications

References 2 publications

Determinants of bovine thermal response to heat and solar radiation exposures in a field environment

Determinants of bovine thermal response to heat and solar radiation exposures in a field environment

Sexual behaviour and gonadal activity during the year in the tropical Creole meat goat. I. Female oestrous behaviour and ovarian activity

The effect of sudden solar exposure on thermophysiological parameters and on plasma prolactin and cortisol concentrations in male Creole goats

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