Abstract:
The objectives of this research were 1) to study light intensity on the nursing of tadpoles and 2) to design the light intensity control technology. The methodology was divided into 2 steps; the 1st step was experiment designed by Completely Randomize Design (CRD), concerned with 4 treatments 4 replications, i.e., at 900 1,100, 1,900 2,100, 3,900 4,100 and 7,900 8,100 Lux, respectively. Each experimental unit contained 50 tadpoles, 20 days age of tadpoles and 30 days nursing. The 2nd step was light intensity control technology by selected the light intensity level that effected on the nursing of tadpoles, innovated and efficiency tested of the light intensity control technology for the nursing of tadpoles. The weight, length and survival rate of tadpoles, ammonia, alkalinity, turbidity, dissolve oxygen, pH and temperature of water were collected. The results showed that light intensity was significantly different (p<0.05) on the survival rate of tadpoles. The light intensity at 900 1,100 and 1,900 2,100 Lux were the highest of survival rate and natural light which consist of light intensity and thermal energy from infrared were effected on survival and growth rate of tadpoles.