本邦産カタクチイワシの研究-I : 種族的研究 (2)

概要

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After the samples of vertebral compositions of anchovies from 1951 to 1953 were classified into several types applying the x2-method to each sample of Tokai, Nankai and Nihonkai Regions as reported lately “on the stock of Japanese sardine”, the author discussed the relations between anchovy shoals in each year class and mainly in two sea regions. The results obtained from the x2-comparison are as follows. 1. In any of years, as the common results through each year class, the cases of the same types and the different types between Nankai and Tokai in 0 year fish are 3 and 2, in 1 year class 3 and 0, in 2 or more year class 1 and 1. 2. In any of year classes, as the common results through each year class, the cases of the same types from Nankai between 0 year and 1 year fish are 6, those from Tokai between 1 year and 2 or more year fish are 4, those between 0 year fish from Tokai and 1 year or 2 or more year fish from Nankai are 4. 3. On the year fluctuation and the growth of those types, on the relation between water temperature and the types, on the method to classify fish shoals by means of the “Entropy” by Doi, some points are taken into consideration.
公益社団法人日本水産学会の論文