Effects of Temperature on Growth, Feed Intake and Antithrombin Activity of Poecilobdella manillensis

摘要

The effects of different water temperatures on the growth, feed intake and antithrombin activity of P. manillensis were studied in order to identify the optimum water temperature for growth. After P. manillensis were cultured at the water temperatures of 18, 22, 26, 30, 34, 38 °C and room temperature (RT), final body weight (FBW), weight gain rate (RWG), specific growth rate (SGR), feed conversion rate (FC), average feed intake per time (AFI), average feed intake rate per time (AFIR), survival rate (SR) and antithrombin activity (AT) were measured for 64 days. The result showed that FBW, RWG, SGR, AFI, and SR of P. manillensis presented different growth indices that were higher than other experimental treatments at 26-30 °C (P0.05), while FC was lower than others. The optimal water temperature range for P. manillensis was 26-30 °C, and the results indicate that the maximum AT (295.52 U) occurs at 34 °C (P0.05).