Market Broiler Management Practice Test

When adjusting the dark period for broilers, an increase is recommended starting at what weight range?

1. 50-100 grams

2. 70-150 grams

3. 100-160 grams

4. 200-300 grams

The correct answer is: 100-160 grams

When managing the lighting conditions for broilers, it is crucial to adjust the dark period to promote optimal growth and well-being. The recommended increase in the dark period typically begins when the birds reach a weight range of about 100-160 grams. At this weight, broilers are in a critical growth phase where their body structure and physiological processes are highly responsive to environmental conditions, including light exposure. Increasing the dark period at this stage is beneficial because it encourages natural behaviors like rest and reduces stress, which can contribute to better weight gain and feed efficiency. Additionally, establishing a longer dark period influences the regulation of hormones associated with growth and development, further enhancing overall health and growth performance. The other weight ranges provided in the options are either below or above this optimal range. Adjustments made too early while broilers are still very young or not yet fully developed may not yield the desired effects, while changes made at much heavier weights may miss the crucial period needed for supporting growth. This strategic timing ensures that the broilers benefit maximally from the adjustment in their lighting schedule.