Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions
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 rhyt...
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Ubiquity Press
2017-08-01
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Series: | Journal of Circadian Rhythms |
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Online Access: | https://www.jcircadianrhythms.com/articles/151 |
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author | Harold Kuta Makeri Joseph Olusegun Ayo Tagang Aluwong Ndazo Salka Minka |
author_facet | Harold Kuta Makeri Joseph Olusegun Ayo Tagang Aluwong Ndazo Salka Minka |
author_sort | Harold Kuta Makeri |
collection | DOAJ |
description | 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. |
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spelling | doaj.art-c2cd1f5076bb49be9dd7eaf530f1c4d32022-12-21T23:59:42ZengUbiquity PressJournal of Circadian Rhythms1740-33912017-08-0115110.5334/jcr.151137Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate ConditionsHarold Kuta Makeri0Joseph Olusegun Ayo1Tagang Aluwong2Ndazo Salka Minka3Department of Animal Health and Husbandry, College of Agriculture and Animal Science, Division of Agricultural Colleges, Ahmadu Bello University, Mando-KadunaDepartment of Physiology, Faculty of Veterinary Medicine, Ahmadu Bello University, ZariaDepartment of Physiology, Faculty of Veterinary Medicine, Ahmadu Bello University, ZariaDepartment of Physiology, Faculty of Veterinary Medicine, Ahmadu Bello University, ZariaSeveral 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.https://www.jcircadianrhythms.com/articles/151bloodbroiler chickenscircadian rhythmnatural photoperiodtropical climate |
spellingShingle | Harold Kuta Makeri Joseph Olusegun Ayo Tagang Aluwong Ndazo Salka Minka Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions Journal of Circadian Rhythms blood broiler chickens circadian rhythm natural photoperiod tropical climate |
title | Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions |
title_full | Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions |
title_fullStr | Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions |
title_full_unstemmed | Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions |
title_short | Daily Rhythms of Blood Parameters in Broiler Chickens Reared under Tropical Climate Conditions |
title_sort | daily rhythms of blood parameters in broiler chickens reared under tropical climate conditions |
topic | blood broiler chickens circadian rhythm natural photoperiod tropical climate |
url | https://www.jcircadianrhythms.com/articles/151 |
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