Telemetry Measured Body Temperature of Domestic Fowl at Various Ambient Temperatures

Kadono, Hiroshi; Besch, E. L.

doi:10.3382/ps.0571075

Cited by 13 publications

(3 citation statements)

References 15 publications

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“…Also supported by USDA grant 95-37203-2702, Arkansas Agricultural Experiment Station. 2 Correspondence: Wayne L. Bacon [3][4][5][6][7][8] and Japanese quail [9,10]. Kadono and coworkers [7] found that, under conditions of constant light, chicken hens selected for increased egg production (White Leghorn) had a body temperature circadian rhythm with a period of 25.3 h that was the same as the period for ovipositions.…”

Section: Introductionmentioning

confidence: 98%

Circadian Rhythm of the Preovulatory Surge of Luteinizing Hormone and Its Relationships to Rhythms of Body Temperature and Locomotor Activity in Turkey Hens1

Yang

Morgan²,

Kirby³

et al. 2000

Biology of Reproduction

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Simultaneous measurements of plasma LH, body temperature, and locomotor activity were made in laying turkey hens and are reported. Blood samples were remotely collected using a jugular cannula system, and body temperature and locomotor activity were remotely monitored using a radiotelemetry system in freely moving laying turkeys. Under a photoschedule of 14L:10D, the period for preovulatory surges of LH was 25.7 +/- 0.4 h while the periods for peak body temperature and onset of sustained locomotor activity were 24.9 +/- 0.4 and 25.7 +/- 0.5 h, respectively. During exposure to constant light, the periods for preovulatory surges of LH, peak body temperature, and onset of sustained locomotor activity increased to 27.9 +/- 0.9, 26.7 +/- 0.7, and 27.4 +/- 0.7 h, respectively. With the 14L:10D photoschedule, initiation of LH surges was restricted to the scotophase, but after 8 days of constant light, initiation of LH surges had dispersed throughout the 24-h subjective day and night. With constant light, the amplitude of the peak body temperature rhythm decreased, while the duration of the locomotor activity rhythm became broadened and, in some birds, disorganized. Peak body temperature and onset of locomotor activity rhythms and LH surges did not coincide, even though peak body temperature, onset of locomotor activity, and LH surges had similar periods. It is concluded that 1) the photoschedule influences the periods of the LH surge, peak body temperature, and onset of locomotor activity; and 2) a specific or direct relationship between the rhythms of LH surge, body temperature, and locomotor activity remains to be determined in laying turkey hens.

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Section: Introductionmentioning

confidence: 98%

Circadian Rhythm of the Preovulatory Surge of Luteinizing Hormone and Its Relationships to Rhythms of Body Temperature and Locomotor Activity in Turkey Hens1

Yang

Morgan²,

Kirby³

et al. 2000

Biology of Reproduction

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“…In studies carried out on adult roosters, Kadono and Besch (1978) showed that, among others, the rectal temperature of birds maintained at ambient temperatures (23°C) and photoperiod of 12L:12D (light during 7.00-18.00) reached a peak value (41.7-41.9°C) between 13.00-15.00, while the lowest (41.0-41.1°C) between 23.00-3.00 h. Daily temperature fluctuation equaled 0.9°C and was similar to that found in the control group of hens in our experiment.…”

Section: Osmentioning

confidence: 99%

The effect of pinealectomy on oxygen consumption and rectal temperature of adult hens

Pietras¹

1996

J. Anim. Feed Sci.

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The study was conducted on fifteen 16-month Leghorn hens raised in cages under standard feeding conditions and lighting 14L: 10D (light from 7.00 to 21.00). The control group comprised hens that did not undergo any procedure, the second control group underwent a mock operation, while the experimental group was subjected to pinealectomy. The procedures were carried out under general anesthesia. Oxygen consumption was measured and rectal temperature recorded during the light (10.00-15.00 h) and dark (22.00 -3.00 h) periods of the day. Feed intake was recorded for the periods between 7.00-15.00 and 15.00-7.00 h. It was found that pinealectomy significantly increased nocturnal oxygen consumption and rectal temperature. Pinealectomized hens consumed considerably more feed during the day, particularly in the afternoon and at night. These results show that pinealectomy in adult hens modifies circadian metabolic rate and feed intake.

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“…Like other homeotherms, birds have developed a physical and metabolic mechanism for thermoregulation 4 . Adults chickens have an average body temperature ranging from 41 to 42 °C under thermoneutral conditions 5 . However, when the temperature rises to a certain extent, broilers’ ability to dissipate heat is markedly diminished.…”

Section: Introductionmentioning

confidence: 99%

Impact of embryonic manipulations on core body temperature dynamics and survival in broilers exposed to cyclic heat stress

Ncho

Goel

Gupta

et al. 2022

Sci Rep

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Ambient temperature-associated stress has been shown to affect the normal physiological functions of birds. The recent literature indicated that both, embryonic thermal manipulation (ETM) and in ovo feeding (IOF) of γ-aminobutyric acid (GABA) can mitigate the deleterious effects of heat stress (HS) in young broiler chicks. Therefore, this study intended to assess the effects of cyclic HS (32 ± 1 °C, 4 h/day from day 29 to 35) on rectal temperatures (RTs) and survival in broiler chickens after ETM and in IOF of GABA. A total of 275 RT data points and survival data were collected from chicks assigned to the following five treatments: chicks hatched from control eggs (CON); chicks hatched from control eggs but exposed to HS (CON + HS); chicks hatched from eggs injected at 17.5 days of incubation with 0.6 mL of 10% GABA and exposed to HS (G10 + HS); chicks hatched from thermally manipulated eggs (39.6 °C, 6 h/day from embryonic days 10 to 18) and exposed to HS (TM + HS); chicks hatched from eggs that received both previous treatments during incubation and exposed to HS (G10 + TM + HS). Under thermoneutral conditions, RTs increased quadratically from 39.9 ± 0.2 °C at hatching to 41.4 ± 0.1 °C at 8 days of age. When exposed to cyclic HS during the last week of rearing, the birds’ RTs tended to decrease at the end of the heat stress challenge (from 43.0 ± 0.2 °C on day 29 to 42.4 ± 0.1 °C on day 35). A stepwise Cox regression indicated that treatment was predictive of birds’ survival. Hazard ratios (HR) and their confidence intervals (CI) were calculated to assess the likelihood of death during the trial. The birds, belonging to the G10 + TM + HS group, were less likely to die under HS (HR 0.11, 95% CI 0.02 to 0.91, P = 0.041) compared to the CON + HS birds. Taken together, the combination of ETM and GABA IOF may help mitigate the drawbacks of cyclic HS by improving the survival of broilers.

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Telemetry Measured Body Temperature of Domestic Fowl at Various Ambient Temperatures

Cited by 13 publications

References 15 publications

Circadian Rhythm of the Preovulatory Surge of Luteinizing Hormone and Its Relationships to Rhythms of Body Temperature and Locomotor Activity in Turkey Hens1

Circadian Rhythm of the Preovulatory Surge of Luteinizing Hormone and Its Relationships to Rhythms of Body Temperature and Locomotor Activity in Turkey Hens1

The effect of pinealectomy on oxygen consumption and rectal temperature of adult hens

Impact of embryonic manipulations on core body temperature dynamics and survival in broilers exposed to cyclic heat stress

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