Study On The Bioenergetics In Anguilla Japonica

The experiment was conducted for 56 days in order to determine the effects of the nitrogen budget, specific growth rate (SGR), body components and energy budget under the different water temperatures (22℃,27℃,32℃). In each temperature, the study discusses the differences between the two feeding proportions (a.m.:p.m.=5:5 and 3: 7). After comfirming the optimum water temperature for growing (27℃), the study discusses the same effects under the different ration levels (0,1%,2%,station) in 27℃in Anguilla japonica. The results of the study are summarized as follow.1) Ammonia is the main part of the total nitrogen, and the rate of the total nitrogen is changed significantly as the temperature rising. In 27℃, the rate is the highest. The rate of the total nitrogen is also changed significantly as the ration level increasing, and in 1%, the rate is the lowest. Under the station, the rate is the highest, and the value is 73.09%.2) The effects of water temperatures on nitrogen budget are significantly (P<0.05). All the parts of nitrogen budget are increasing as the water temperatures and ration levels rising. GN/CN increases as the same trend and UN/CN is decreasing at the same time. Under the different ration levels, the result shows the same trend.3) The effects of water temperatures and ration levels on ADCd and ADCp are significantly (P<0.05). ADCd and ADCp are increasing as the water temperatures rising, however as the ration levels rising, ADCd and are decreasing. The values are the lowest under the station(ADCd 78.41%, and ADCp 87.33%).4) The effects of water temperatures and ration levels on Dry matter, Crude protein, Crude lipid and Ash are significantly (P<0.05). The levels of the Dry matter and Crude protein are increasing as the water temperatures rising, reaching the highest in 27℃, and then The levels are decreasing slightly. The condition of the Ash level is opposite. The change of Crude lipid level is not significantly. As the ration levels rising, the levels of Dry matter, Crude protein, Crude lipid are rising, and yet the level of Ash is decreasing.5) In 27℃, the energy budgets at maximum ration level were: 100C=28.26G+18.45F+1.91U+51.38R Or100A=64.52R+35.48G6) Under the different temperatures, the effects of feeding proportions are not significantly in all studies (P>0.05).