Unit profitability from day 35 to 42Males had a significantly higher (P<0.05) UP than females from day 35 to day 42 (Table 4).For males, UP had increased from day 35 up to day 40 and reduced thereafter. Malesachieved the highest value of UP (61.7±1.9) at day 40 but were not significantly differentfrom day 39. Value of UP had decreased from day 40 to 42 in males but were notsignificantly different. In female birds, UP value had increased from day 35 to 42 andshowed the highest value of UP, 52.0±1.3 at day 42. The increasing weights of the birdsincrease the UP till it comes to the maximum stocking density of the house. In this trial, aspracticed in Sri Lankan poultry farms, the same floor space per bird were provided for bothsexes. In general, the males have more flesh than the females at the same age. Therefore, themales must have come to the maximum stocking density at day 40 and females didn’t cometo the maximum even at day 42. The same reason has been affected to have significantlyhigher (P<0.05) UP values in males than in females during day 35 to day 42. When thecapacity is limited, and the time is at premium, UP can be used to asses the profitability ofthe broiler operation. Housing cost and environment control cost per unit area is very high inclosed-house operations and compartmentalized operations compared to open sided houses.Therefore, closed-house operators and compartmentalized operators (caged system) can usethe day which gives the highest UP value as the optimum grow out period.
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