救救华南虎

为了摸清广东境内的华南虎野生动物资源省林业主管部门于1985年下半年开始组织了华南濒危动物研究所动物组和省野生动植物自然保护站开展了全省华南虎资源调查工作。从1985年下半年开始至1987年5月结束了外业调查,共调查了粤北、粤东、粤西三大片的24个山区县,走访了41个乡（镇）、村,实地踏查观察追踪虎迹达11个县的14个较高

海南坡鹿生态习性和驯化饲养繁殖利用的研究通过鉴定

最近,林业部科技司组织国内有关专家在海南省东方大田坡鹿保护区召开海南坡鹿生态习性和驯化饲养繁殖利用的研究鉴定会。该研究是林业部为了拯救濒危珍稀野生动物物种海南坡鹿,于1984年底由林业部作为部的重点科研项目,下达给广东省林业厅野生动植物自然保护站承担,组织华南濒危动物研究所、东方县大田坡鹿保护区管理站共同承担的。经过三年多的研究,完成了《课题研究计划任务书》所规定的任务。经专家鉴定认为:该课题研究能紧密结合生产,科研促进了保护,效果显著、资料齐全

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

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^