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Impact of daylength on mortality and cull levels. (a) Comparison of broiler mortality and cull levels (% of placed) under four daylength photoperiods at three age ranges, with data expressed as a percentage of the maximum value within each age; (b) Comparison of turkey mortality and cull levels (% of placed) under four daylength photoperiods at two age ranges, with data expressed as a percentage of the maximum value within each age.
