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 There are many geological time scales: Numerical Dating in Stratigraphy(NDS)(G. S. Odin, ed. 1982). A Geological time scale (GTS) (W. B. Harland, ed. 1982).Geological Society of America (A. R. Palmer, 1983). Correlation of StratigraphicUnits of North America(A. Salvador, 1985). The chronology of the Geological Record (N. G. Snelling, 1985). NDS and GTS are now the main geological time scals used inthe world, in which the JurassicCretaceous boundary ages are 130 Ma and 144 Marespectively. 144 Ma(Harland et... There are many geological time scales: Numerical Dating in Stratigraphy(NDS)(G. S. Odin, ed. 1982). A Geological time scale (GTS) (W. B. Harland, ed. 1982).Geological Society of America (A. R. Palmer, 1983). Correlation of StratigraphicUnits of North America(A. Salvador, 1985). The chronology of the Geological Record (N. G. Snelling, 1985). NDS and GTS are now the main geological time scals used inthe world, in which the JurassicCretaceous boundary ages are 130 Ma and 144 Marespectively. 144 Ma(Harland et al., 1982)comes from "equal age hypothesis", whereas 130 Ma (Kennedy & Odin, 1982) is derived from practical dating of stratigraphy and was one of the research results of IGCP Project 133 in which 136 expertsfrom all over the world participated and contributed their data. So the authors ofthis paper consider 130 Ma to be the JurassicCretaceous boundary age of marinestrata in Europe. On the other hand, in China an isotopic age of 140 Ma was assigned to theJurassicCretaceous boundary (Wang & Diao, 1984). The average age of each Mesozoic stage is about 6Ma. The 10 Ma difference betwean 140 Ma and 130 Ma of theJurassicCretaceous boundary ages Corresponds to more than one stage. It is obviousthat the JurassicCretaceous bonndary age of China or NDS should be considereda new. The 140 Ma boundary age of China was determined on the basis of eruptiverocks and/or plutons, but the marine beds have not been dated so far. Snelling (1985) put forward an interim proposal in which the JurassicCretaceous boundary was 135 Ma. The authos consider that 135 Ma would be eventuallyreplaced by 130 Ma. But this boundary age might not be formally determined untilthe international field meeting of the Working Group on the JurassicCretaceousboundary in the North Caucasus, USSR, is held in 1987. From existing data, it maybe possibly reduced from 135 Ma to 130 Ma or even younger.  近年来,欧美各国和我国先后对全球或本国地质年表进行了补充和修订。关于白垩系的底界年龄,各种方案之间的分歧很大。我们研究了以130Ma和144Ma为代表的两个方案,参考了《中国地质年表草案》、《全球及北美年代地层表》、《折中地质年表》和第六届国际地质年代学,宇宙年代学,同位素地质学大会(1986,伦敦)的最新资料,并列表进行了对比。从目前的资料来看,144Ma方案既不能用,130Ma方案又有些人还不能接受,我国以暂时采用135Ma方案为宜。但从长远看,国际侏罗——白垩系高加索现场会议(将于1987年在苏联)召开之后,135Ma方案有可能被130Ma方案取而代之。  On the basis of the study of the viability, reproduction and development of Callosobruchus Chinensis L. under 8 types of constant temperatures,a life table of the tested population in specific periods was worked out, The analysis showed that 30℃ was the most proper temperature for the viability of the population,its innate capacities for incsease being the highest;that28. 6℃ was the most proper temperature for the increase of the population,while the temperatureabove 36. 6℃ could effectively control the population.... On the basis of the study of the viability, reproduction and development of Callosobruchus Chinensis L. under 8 types of constant temperatures,a life table of the tested population in specific periods was worked out, The analysis showed that 30℃ was the most proper temperature for the viability of the population,its innate capacities for incsease being the highest;that28. 6℃ was the most proper temperature for the increase of the population,while the temperatureabove 36. 6℃ could effectively control the population. The temperature affected the period of thedevelopment of the population and the preduction of eggs,but it was insignificant. Thus,the lifetable of the population in the specific periods was converted into the life table of equal age groupsto provide data for Leslie matrix model for the purpose of predicting quantitative dynamics andages of the population.  本文研究了绿豆象在八种恒温条件下的存活力、繁殖力及发育，编制出绿豆象实验种群特定时间生命表并进行分析。结果表明：３０℃最适合绿豆象种群的存活，种群内禀增长力最大；２８，６℃最适于绿豆象种群的增长；３６．６℃以上的高温能有效地控制绿豆象种群。温度影响绿豆象的发育历期和产卵量，但影响不显著。编制的特定时间生命表进一步转化为等年龄距生命表，将为Ｌｅｓｌｉｅ矩阵模型提供数据，用于预测绿豆象种群数量动态及其年龄结构。  Using the physiologic time of the tested population of Callosobruchus chinensisL. as age span,the population life table was converted into a life table with the same age spanand the converting method of reproduction ability and viability between one age span and thenext was found out,the data analysed,Tbe restilt showed that an equal age span of the population of Callosobruchus chinensis L. could be accurately divided by means of physiologic time,thus simplifying the construction and calculation of the dynamically... Using the physiologic time of the tested population of Callosobruchus chinensisL. as age span,the population life table was converted into a life table with the same age spanand the converting method of reproduction ability and viability between one age span and thenext was found out,the data analysed,Tbe restilt showed that an equal age span of the population of Callosobruchus chinensis L. could be accurately divided by means of physiologic time,thus simplifying the construction and calculation of the dynamically predicting model of thepopulatioi1 and increasing the accuracy of the output of the model.  本文研究了以绿豆象实验种群的生理时间为年龄间隔，将该种群生命表转化为等年龄距生命表和各历期等距间隔中的生殖力、存活率的转化方法；并对该种群的等年龄距生命表数据分析。结果表明，利用生理时间能较准确地等距划分绿豆象种群的年龄，从而将简化该种群动态预测模型的建造和计算，提高模型输出的准确率。   << 更多相关文摘 
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