生物医学动物实验中的实验设计和统计分析

实验设计和统计分析在动物实验研究的启动、实施和结果评价中起着关键的作用。我们对实验设计的因素、原则及实验设计类型进行了综述,阐明了统计分析在整个研究所有环节中的重要意义,并提出在生物医学动物实验中容易忽视的统计学分析的问题。     

Comparative Ecology of Rubus Species (Rosaceae) II. Reproductive Characteristics of Three Rubus Species, R. palmatus var. coptophyllus, R. microphyllus and R. crataegifolius

Abstract The reproductive characteristics of three Rubus species ( R. palmatus Thunberg var. coptophyllus (A. Gray) O. Kuntze, R. microphyllus L.f., and R. crataegifolius Bunge) were critically investigated using materials collected from the forest floor of an 85-year-old Hinoki ( Chamaecyparis obtusa ) plantation in central Honshu, Japan. The underground branching patterns of these species were also investigated at the nursery. R. microphyllus produced the largest number of fruits in the same cane size among the three species (164 fruits per cane of 300 cm³ in D₀2H). However, the largest number of seeds produced per cane was in R. crataegifolius , where the maximum seed number attained 74,500 per cane, which was twice as many as those of the other two species. There was no apparent difference in dry matter allocation to fruits in these species. The three species produced numerous suckers by underground branching, forming large clones. In the open site at the nursery, the number of suckers produced by underground branching increased exponentially. On the other hand, in natural populations occurring in closed sites, the number of suckers produced by underground branching in the three species was by contrast much smaller. Three Rubus species proved to possess similar perennation as well as reproductive strategies, although R. palmatus var. coptophyllus shows much lower seed production and slower sucker production than the other two species.     

Book Review: Comparative Vertebrate Lateralization. Edited by Lesley J. Rogers and Richard J. Andrew,Cambridge University Press,Cambridge, UK, 2002, ix + 660 pp., US$120.00 (hardback)

International Journal of Primatology -