Building and Researching a Fish Egg Incubation System with Recycled Water

• Main Authors: Kuo-Chih Tung, 童國枝
• Other Authors: Jiunn-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/72058294896954348627

碩士 === 國立中興大學 === 農業機械工程學系 === 89 === Abstract This study established a recycled water incubation system which was according to the traditional incubation system. This system could regulate and control the temperature and dispose the recycled water. Hereby, the testing steps and water quality data for incubating Ctenopharyngodon idellus eggs were given to reference. The experiment device within Semi-Pelagic Ctenopharyngodon idellus eggs was set up to figure out the differences of properties between the nature Ctenopharyngodon idellus eggs and substitute eggs. Moreover, the related curve of the water flow and the pushed height of the plastic grains, a kind of substitute egg, in the incubation tank was found, and then was added a function F(X)=0.6072 * X + 35.3931 to establish the curve of Ctenopharyngodon idellus eggs in the incubating tank. Incubating Ctenopharyngodon idellus eggs needs 22-24 hours and must control the temperature at 25±0.5℃. When we tested the air and water flow rate to the floating condition of Ctenopharyngodon idellus eggs in the incubating tank for seeking the best distribution condition of eggs, we found air flow rate at 3.0 L/min and water flow rate at 8.0 L/min are the optimum distribution condition of Ctenopharyngodon idellus eggs. As to the water quality in this system of incubating Ctenopharyngodon idellus eggs, the concentrations of NH3-N and NO2--N were controlled respectively under 0.18 ppm and 0.11 ppm. The concentration change of NO3--N shall be kept at the range of 30ppm. The incubation rate of this system is 21.5% more than the traditional system, and the damage rate is 0.7%.