全球气候变暖对中国血吸虫病传播影响的研究 Ⅳ自然环境中钉螺世代发育积温的研究

IMPACT OF GLOBAL WARMING ON TRANSMISSION OF SCHISTOSOMIASIS IN CHINA Ⅳ ACCUMULATED TEMPERATURE FOR DEVELOPMENT OF GENERATIONS OF ONCOMELAN1A HUPEN-SIS IN NATURAL ENVIRONMENT

目的 研究钉螺在自然环境中完成世代发育的有效积温。方法 将钉螺按常规方法饲养在自然环境中,观察其从螺卵生长发育至成螺并产卵所需的发育历期与积温,并按公式T=Σ(Ti-C)计算其完成世代所需的有效积温。结果 钉螺从螺卵发育至成熟产卵(即完成世代发育)的平均历期为(334.22±7.52)d、平均积温为(5821.38±70.05)日度,平均有效积温为(3846.28±32.59)日度。结论 本方法观测的钉螺发育有效积温较精确,为气候变暖影响日本血吸虫病传播的预测模型提供了理论参数。

Objective To determine the effective accumulated temperature of Oncomelania hu-pensis during the period of development of generations in the natural environment. Methods The snails, Oncumelania hupensis, were raised in natural breeding site, the developing duration and accumulated temperature for .snails' development from eggs to adult that began to lay eggs were estimated based on the formula T=Σ(Ti-C). Results The average developing duration was (334.22±7. 52) days, average accumulated temperature was (5 821.38±70.05) day degree, and average effective accumulated temperature was (3 846.28±32. 59) day degree. Conclusion The method to estimate the effective accumulated temperature is quite accuracy, which provides theoretical parameters in developing the prediction model on transmission of schistosomiasis japonica affected by weather warming.