Growth characteristics and production performance analysis of new scallop strain Zihaimo F_4

To assess the production performance of the scallop new strain Zihaimo and provide references for the breeding effect of the new strain,we conducted a research in the same sea area with the same management mode and breeding cycle.By comparing seven traits of scallop farming population including shell length (SL),shell height (SH),shell width (SB),body mass(BW),adductor muscle mass (AW) and shell mass (SW) and survival rate of the new strain Zihaimo F_4 with the Argopecten irradians concentricus,we analyzed their growth characteristics and production performance.The results indicate that the accumulated survival rate of Zihaimo F_4 was 51.32% when it was cultured from October 13~(th) to April 28~(th) of the next year,and the SL was from 1-1.5 mm to 50-60 mm,which was significantly greater than 29.18% of A.irradians concentricus (P<0.01).However,the SL,SH,SB and SW of the two cultivation groups in the same period had extremely significant differences(P<0.01).It is suggested that the growth rate of the new strain Zihaimo F_4 was higher than that of A.irradians concentricus.Compared with A.irradians concentricus,after 6.5 months of cultivation,the SL,SH,SB,BW and AW of the new strain Zihaimo F_4 increased by 19.50%,19.84%,16.23%,56.30% and 20.20%,respectively

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^