Effects of Strain and Skip-a-day Feed Restriction on Carcass Characteristics of Broiler Chickens at Finisher Stage
Abstract
The present study was undertaken to investigate the effects of strain and feed restriction on live weight and carcass characteristics of broiler chickens. Feed restriction is a management tool designed to reduce the amount of feed consumed by broilers to produce more meat without jeopardizing their health condition. The strains of broilers reared are Arbor Acre, Hubbard and Marshall. The four treatments are: A- full feeding (control), B-5th week feed restricted, C- 6th week feed restricted and D- 7th week feed restricted groups. After each feed restriction regime the birds were restored to full feeding until the termination of the experiment on the 56th day. Analyzed results showed that there was no significant (p>0.05) effect of strain on live weight, bled weight, dressed weight, eviscerated weight, breast weight, back weight, thigh, drumstick, wing weight, head, heart, liver, proventriculus, intestine weight, spleen, lung + trachea, vent and shank. Arbor Acre, Hubbard and Marshal strains of broiler recorded similar mean values regardless of the treatment imposed on them. Therefore, any of the strains of broiler chickens can be reared for meat production and revenue generation. In addition, there was significant (p<0.01) effect of feed restriction regimes on live weight of broiler chickens and carcass traits except back, thigh and wing muscle weights. The 5th week restricted birds recorded superior mean values than 6th and 7th week restricted birds in some of the traits measured. It is therefore suggested that feed restriction be carried out at younger age, say 5th week, for farmers to derive maximum benefits from the concept. Any other time during finisher stage may be counterproductive.