| 郭晓亮,毛玉泽,李 阳,李加琦,陈琼琳,薛素燕,高振锟.牡蛎壳粉缓释剂对魁蚶(Scapharca broughtonii)生长的影响.渔业科学进展,2017,38(4):180-185 |
| The effect of careshell on growth and survival of Scapharca broughtonii was investigated in Sanggou Bay from April 6 to October 26,2015. S. broughtonii with initial mean weight of 160 g were exposed to the environment with four doses of Careshell: 0 (control, C0), 80 g(C1), 160 g(C2) and 320 g(C3) respectively. The growth indices (shell length, shell width, shell height, wet weight) of S. broughtonii were measured and the number of deaths recorded in every 40-day period. The experiment lasted 200 days. Growth and mortality rates were calculated in each period. The results showed that the growth indices of S. broughtonii for C3 group were significantly higher than those of the control group C0 (P<0.05), but the difference with C2 and C1 was not significant (P>0.05). The growth rates of shell length, shell width, shell height and wet weight for C3 during the experimental period were, (0.34±0.01)%/d, (0.46±0.02)%/d, (0.39±0.01)%/d and (1.11±0.002)%/d, respectively, which were significantly higher than those of C0 (P<0.01). On the average, the indices during the experimental period were increased by 17.9%, 20.3%, 18.1% and 16.7% respectively, which were significantly higher than those of C0 (P<0.01). The mortality rate of C3 group (19.6±5.6)% was lower than that of the control group C0 (26.1±2.5)%, but the difference was not significant (P>0.05) |
