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

Journal of Circadian Rhythms
Harold Kuta MakeriNdazo S Minka

Abstract

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, het...Continue Reading

References

Feb 1, 1989·Journal of Clinical Pathology·S J PocockP M Broughton
Jan 1, 1985·Folia primatologica; international journal of primatology·R KleinH G Erkert
Apr 18, 2003·Frontiers in Bioscience : a Journal and Virtual Library·Giuseppe Piccione, Roberto Refinetti
Jun 7, 2005·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Giuseppe PiccioneJacopo P Mortola
Jun 14, 2005·Nature Reviews. Genetics·Deborah Bell-PedersenMark J Zoran
Dec 29, 2009·Frontiers in Bioscience (Landmark Edition)·Roberto Refinetti
Jan 29, 2011·Nature·John S O'Neill, Akhilesh B Reddy
Mar 26, 2013·Research in Veterinary Science·Giuseppe PiccioneRoberto Refinetti
Jan 1, 2007·Biological Rhythm Research·Roberto RefinettiFranz Halberg
Oct 12, 2016·Current Biology : CB·Walter Wilczynski, Deborah I Lutterschmidt

❮ Previous
Next ❯

Citations

Jul 9, 2020·Animals : an Open Access Journal From MDPI·Tanja HofmannVolker Stefanski

❮ Previous
Next ❯