Thermal chronobiology of domestic animals

Piccione, Giuseppe; Refinetti, Roberto

doi:10.2741/1040

Cited by 55 publications

(9 citation statements)

References 51 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The present result is in contrast with the finding of Picconne et al [3], who obtained a peak in foot temperature six and 13 hours before RT in sheep kept under cold condition (9°C) and themoneutral zone (25°C), respectively. Our result also disagrees with the finding in humans that foot and core temperatures attained their peaks at 12 h apart [3738]. The finding that BST, especially the feet temperature, peaked several hours before RT suggests that the mechanism of thermoregulation in the feet may be involved in production of the oscillation in RT as earlier suggested [3538].…”

Section: Discussioncontrasting

confidence: 99%

“…In both studies in sheep and goats mentioned above and in the current study, the highest amplitude of daily rhythmicity of RT values was recorded when AT oscillated about 20°C, which is also similar to the finding of Lovegrave and Heldmaier [36]. The amplitude of daily rhythmicity of BST obtained at various sites in the present study was between 3 – 7°C, which was greater than the amplitude values of 0.5 – 1.3°C in sheep [37]. The differences in the amplitudes may be due to variations in animal species and AT.…”

Section: Discussionsupporting

confidence: 89%

See 1 more Smart Citation

Effects of Cold-Dry (Harmattan) and Hot-Dry Seasons on Daily Rhythms of Rectal and Body Surface Temperatures in Sheep and Goats in a Natural Tropical Environment

Minka

Ayo

2016

Journal of Circadian Rhythms

View full text Add to dashboard Cite

Studies on daily rhythmicity in livestock under natural conditions are limited, and there is mounting evidence that rhythm patterns differ between chronobiological studies conducted in the laboratory and studies conducted under pronounced natural seasonality. Here, we investigated the influence of cold-dry (harmattan) and hot-dry seasons on daily rhythmicity of rectal (RT) and body surface temperatures (BST) in indigenous sheep and goats under natural light-dark cycles. The RT and BST of the animals, and the ambient temperature (AT) and relative humidity (RH) inside the pen, were measured every three hours for a period of two days, twice on separate days during the hot-dry and the harmattan seasons, respectively. The AT and RH had minimum values of 16°C and 15% recorded during the harmattan and maximum values of 32°C and 46% recorded during the hot-dry season, respectively. A trigonometric statistical model was applied to characterize the main rhythmic parameters according to the single cosinor procedure. The result showed that RT and BST exhibited different degrees of daily rhythmicity, and their oscillatory patterns differed with the seasons (larger amplitude during the harmattan season than during the hot-dry season). The goats displayed greater (p < 0.05) amplitude of BST than the sheep in all seasons. The acrophases were restricted to the light phase of the light-dark cycle. The mesor of RT in goats was not affected by the season, but mesors of BST in both species were significantly higher (p < 0.05) during the hot-dry than the harmattan season. The goats had a more robust RT rhythm (70%) as compared to the sheep (56%). Overall, the results demonstrated that seasonal changes influenced considerably the daily rhythmicity of RT and BST in sheep and goats under natural light-dark cycle. Awareness of these changes may be useful in the improvement of diagnosis, treatment and prevention of diseases, and welfare and productivity of sheep and goats under cold-dry and hot-dry conditions.

show abstract

Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 89%

Effects of Cold-Dry (Harmattan) and Hot-Dry Seasons on Daily Rhythms of Rectal and Body Surface Temperatures in Sheep and Goats in a Natural Tropical Environment

Minka

Ayo

2016

Journal of Circadian Rhythms

View full text Add to dashboard Cite

show abstract

“…Of the parameters measured, the PCV and lymphocyte counts had the greatest amplitude, while the lowest amplitude was recorded in TP, apparently because the TP did not exhibit any rhythm or variability. It has been shown that greater amplitude is accompanied by a reduction in mesor [ 4 ]. In the present study, haematological parameters with larger values tended to have greater amplitude, while those with smaller values had the tendency to have lower amplitudes.…”

Section: Discussionmentioning

confidence: 99%

“…The circadian system has been extensively studied in mammals [ 4 5 ]; however, in poultry such studies are limited [ 6 7 ]. The avian circadian system is more complex than that of mammals.…”

Section: Introductionmentioning

confidence: 99%

Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions

Makeri

Ayo

Aluwong

et al. 2017

Journal of Circadian Rhythms

View full text Add to dashboard Cite

Several studies carried out on humans and other mammals show that the temporal organisation of haematological parameters in the blood exhibit daily rhythms; however, such studies have been rare in poultry reared under a natural photoperiod. The present study investigated the occurrence of daily rhythms in blood parameters of broiler chickens kept under tropical climatic conditions. Ten 6–7-week-old broiler chickens served as subjects of the study. They were kept in standard individual cages under natural light-dark cycle and given access to feed and water ad libitum. Two milliliters of blood was collected from each bird via intravenous cannulae inserted into the wing vein. The blood samples were collected every 4 h over a 24-h period, starting from 09:00 h on the first day and completed at 09:00 h on the second day. The blood samples were analysed for erythrocyte, total and differential leucocyte counts. A trigonometric statistical model according to the single cosinor procedure was used to describe the periodic parameters and their acrophases, and ANOVA was used to determine significant differences. The results demonstrated the existence of daily rhythms in packed cell volume, haemoglobin, white blood cell, red blood cell, heterophil, lymphocyte, eosinophil and monocyte counts, while total protein displayed no rhythm. The characteristics of the haematological parameters showed that the acrophases were restricted to the light phase of the light/dark cycle, precisely at 09:00 h, except for eosinophil and heterophil counts, which had acrophases at 21:00 h. The amplitudes of the blood parameters varied, with packed cell volume having the greatest amplitude of 4.2 ± 0.5, closely followed by lymphocyte (3.4 ± 0.5) and heterophil (2.3 ± 0.2) counts. In conclusion, the results of the study demonstrated the existence of daily rhythms with diurnal acrophases in blood parameters of broiler chickens kept under natural photoperiods and tropical conditions.

show abstract

“…In thermoneutraler Umgebung liegt die physiologische Körpertemperatur des Rindes zwischen 38,0 und 39,2°C [8]. Fieber, indikativ für einen krankhaften Zustand, wird von verschiedenen Autoren als Anstieg der Körpertemperatur über einen Grenzwert von 39,4-39,7°C definiert [9] [10].…”

Section: Introductionunclassified

Messung der Körpertemperatur beim Rind – eine altbewährte Methode kritisch hinterfragt

Fischer-Tenhagen

Arlt²

2020

Tierarztl Prax Ausg G Grosstiere Nutztiere

View full text Add to dashboard Cite

ZusammenfassungDie Messung der Körperkerntemperatur ist ein essenzieller Bestandteil der klinischen Untersuchung des Rindes. Neben dem Einsatz zur Diagnostik von Erkrankungen wurde die Erfassung der Temperatur in der Praxis und in wissenschaftlichen Studien zur Ermittlung des Östrus, der Vorhersage des Kalbebeginns und zur Erkennung von Hitzestress verwendet. Anhand einer systematischen Literaturübersicht gibt dieser Artikel einen Überblick über die Eignung verschiedener Temperaturmessverfahren, wie die rektale Messung, das Einlegen von Temperaturloggern in Vagina und Pansen, die Milchtemperaturmessung und die Messung der Körperoberflächentemperatur. Auch wenn die Messung der Körpertemperatur eine viel genutzte und anerkannte diagnostische Methode ist, zeigt ein genauerer Blick auf die hier zusammengestellten Studien, dass es vielfältige Einflussfaktoren auf die Messergebnisse gibt. Die Varianzen der einzelnen Methoden bekräftigen, dass neu entwickelte Methoden immer kritisch hinterfragt und evaluiert werden müssen. Bezogen auf konkrete Grenzwerte, beispielsweise der Definition, dass ab 39,5°C Fieber vorliegt, kommt der Messgenauigkeit eine hohe Bedeutung zu, da die ermittelte Körpertemperatur einen großen Einfluss auf tierärztliche Therapieentscheidungen hat.

show abstract

Thermal chronobiology of domestic animals

Cited by 55 publications

References 51 publications

Effects of Cold-Dry (Harmattan) and Hot-Dry Seasons on Daily Rhythms of Rectal and Body Surface Temperatures in Sheep and Goats in a Natural Tropical Environment

Effects of Cold-Dry (Harmattan) and Hot-Dry Seasons on Daily Rhythms of Rectal and Body Surface Temperatures in Sheep and Goats in a Natural Tropical Environment

Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions

Messung der Körpertemperatur beim Rind – eine altbewährte Methode kritisch hinterfragt

Contact Info

Product

Resources

About