小型有孔蟲群の類似度について
1949 年 55 巻 644-645 号 p. 49-52
詳細
1949 年 55 巻 644-645 号 p. 49-52
The results of quantitative or statistical studies of assemblages of smaller foraminifera will be used for comparison between two aggregations (degree of resemblance)., Of several formulae showing degree of resemblance, the following seems to be most comprehensive., [numerical formula] Where R : Resemblance degree a : Number of constituents of Group I b : Number of constituents of Group II c : Number of constituents, common in both Groups In applying this formula im comparison between two aggregations, it is reasonable to consider number of individuals in a species., Then the author introduced two empirical ways, one using logarithmic graph (fig., 1) and other adopting 2n (list no., 4), where "n" means evaluation weight replacing real number of individuals, and 2n showing limits of numbers to be represented by the weight "n".,
