|
Breathing animals basic physiological activities of energy metabolism and excretion, it not only reflects the physiological state of the animal, and also reflects the impact of environmental conditions, and understand and master the breathing and excretion of shrimp for reasonable stocking, and water quality in the breeding process management has important guiding significance, and also provide the basis for Litopenaeus vannamei healthy breeding management decision-making system formulation. In this paper, Litopenaeus shrimp (Litopenaeus vannamei) as the research object, its growth in the context of different environments, metabolic characteristics. Study, three nutrient value of the background concentration, temperature, salinity, and their interaction Litopenaeus vannamei oxygen consumption rate and nitrogen, phosphorus excretion rate, and the experimental data regression analysis; preliminary study on the temperature, salinity and their interactions impact on the the Litopenaeus vannamei growth rate, feeding rate and food conversion efficiency, and the experimental data for the regression analysis. The main findings are as follows: (1) is found by two-factor orthogonal experimental background values ??the concentration of the three nutrients, the Litopenaeus vannamei oxygen consumption rate increased with increasing temperature and decreased with decreasing salinity two-factor interactions significantly (P <0.01). In the same time, the background value of high nutrient concentration oxygen consumption rate is slightly less than the rate of oxygen consumption under low nutrient concentration of background values. (2) the concentration of the background value of the three nutrients, of Litopenaeus vannamei oxygen consumption rate nonlinear regression model for the R O1 = the 0.06S 0.066 e < sup> 0.065T (R 2 = 0.9919, P <0.01), R o2 = 0.163S 0.071 e 0.163T (R 2 = 0.905477, P <0.01), R o3 = 0.1768S 0.064 e 0.181T (R 2 = 0.966469, P <0.01). The model can determine temperature, salinity, and descend to the rate of oxygen consumption of shrimp, different water quality conditions and provide the basis for the determination of the amount of oxygen factory farming and optional fan. (3) two-factor interaction of temperature and salinity, phosphorus excretion rate in the value of the background concentrations of the three nutrients with increasing temperature decreased, decreased with decreasing salinity. At high temperature, the phosphorus excretion rate with decreasing salinity and reduce the magnitude of the smaller, indicating that the low temperature, salinity phosphorus excretion rate was significantly higher temperatures. In addition, with decreasing salinity, the shrimp body needs dietary phosphorus is gradually increasing. (4) O / N values ??increased with increasing temperature, decreased with decreasing salinity, indicating that the amount of fat consumed by the metabolism of the shrimp in the high-temperature, high salinity down to earth to be higher than the low-temperature, low salinity . The three nutrient value of the background concentration, Litopenaeus vannamei O / N Basic maintained at about 24. (5) the value of the background concentrations of the three nutrients, Litopenaeus vannamei nitrogen, phosphorus excretion rate nonlinear regression models were the R P1 0.830671S = 0.367 e -0.036T (R 2 = 0.966, P <0.01), R P2 = 0.723345S 0.328 e -0.0243T (R 2 = 0.9004, P <0.01), R p3 = 0.305261S 0.568 e < sup>-0.030T (R 2 = 0.969, P <0.01); R N1 = 1.025S -0.166 e < sup> 0.049T , (R 2 = 0.986, P <0.01) R N2 = 3.7915S -0.351 e 0.017T , (R 2 = 0.9256, P <0.01) R N3 = 1.0647S -0.0184 e 0.0028T , (R 2 = 0.8076, P <0.01). The model can determine the temperature, salinity conditions down to earth shrimp nitrogen, phosphorus excretion characteristics and metabolic intensity farming model evaluation, and control of water quality in the breeding process, put bait is reasonable to provide a basis. (6) under the two-factor cross of temperature, salinity, the the Litopenaeus vannamei growth rate of non-linear regression model for R F = 0.323696S 0.055 e 0.34 T (R 2 = 0.966043, P <0.01), this can determine Litopenaeus vannamei optimum growth conditions. In addition, the feeding rate of the non-linear regression model for R G = 0.02467S 0.102 e 0.474T (R 2 = .94003, P <0.01), Litopenaeus shrimp farming process bait reasonable stocking provide the basis, to avoid too much food waste as well as bait to bring water pollution. Food conversion rate of the non-linear regression equation E F = 0.460S 0.087 e 0.544 (R 2 = 0.953245, P <0.01), its establishment can improve feed efficiency, reduce production costs, while reducing the pollution of the of shrimp feces on aquaculture water environment the.
|