Reproductive Interval in Indonesian Native Laying Hens by Losing Brooding Characteristics

Brooding behavior in Indonesian native chicken is a characteristic under hormone stimulation due to high concentration of prolactin hormone. This characteristic delays egg production causing low reproductive efficiency. The objective of this research was to evaluate the physiological status detected in body temperature (oF) and reproductive interval indicated by brooding period (day) and resting period of egg production (day) after brooding treated with different levels of acetaminoven in a paracetamol tablet. This research was conducted at Matali village, East Kotamobagu district, North Sulawesi province of Indonesia, involving 40 female birds at 10 months old with the average of 1.5 kg live weight (LW) and 10 male birds at 1 year old (ratio of 15). Each flock of ten female birds was raised in a fencing house size of 500x400x200 cm and fed ration ad libitum. This trial was arranged in a completely randomized design consisted of four treatments and ten replication at each treatment. All eggs of the female birds were taken when they were showing brooding behavior. Study was conducted in birds showing brooding behavior using treatments as follows first, the female birds were not fed acetaminoven as traditional management (A0), second, the female birds were fed acetaminoven orally with level of 40 mg/kg LW/day (A40), third, the female birds were fed acetaminoven orally with level of 60 mg/kg LW/day (A60), and forth, the female birds were fed acetaminoven orally with level of 80 mg/kg LW/day (A80). The results showed that body temperature averages at egg production were 105 oF. However, those temperature at brooding period increased significantly (P