Influence of Strain and Feed Restriction on Haematological Parameters of Commercial Cocks
Olawumi Simeon *
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
Ogunlade Taiwo
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
Ojo Joseph
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
Adelabu David
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
Adegun Maria
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
Alamuoye Oluwatoyin
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
Adeusi Adebolu
Department of Animal Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Due to high cost of feed ingredients, and its negative effect on production cost in livestock subsector, feed restriction strategy has been adopted as a means of limiting bird’s access to feeds during the day without compromising quality of poultry products. The present study aimed at investigating the response of two strains of commercial cocks to different feed restriction regimen. A total number of 180 day-old cockerels of two strains comprising Black and White plumage (90 chicks each) were procured to examine and compare their blood parameters. At 6th week of age, the birds were distributed into four treatments with three replicates for each strain. The treatments are, T1: control (ad libitum), T2: feed restricted (6th -7th week), T3: feed restricted (8th -9th week) and T4: feed restricted (10th -11th week). At the end of the 16th week one bird per replicate was randomly chosen for blood collection into a labelled sample bottles treated with anti-coagulant and were taken to the laboratory for analysis. Analyzed results revealed that there was no significant (P>.05) effect of strain on all the parameters measured except Basophil. In addition, there was no significant (P>.05) effect of feed restriction on packed cell volume, haemoglobin, red blood cell, platelets, monocyte, eosinophil and basophil except for white blood cell, lymphocyte and heterocyte. It is however, interesting to note that the obtained mean values for all parameters were comparable, and within the ranges recorded for chickens in previous reports.
Keywords: Strain, feed restriction, white blood cell, red blood cell.
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