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本邦產マイワシの研究―5 : 脊椎骨組成のX²比較の研究(3)


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Title: 本邦產マイワシの研究―5 : 脊椎骨組成のX²比較の研究(3)
Other Titles: Studies on the Japanese Sardine―V. Study on the X²-method of Vertebral Compositions (3)
Authors: 田村, 修
Authors (alternative): Tamura, Osamu
Issue Date: 31-Jan-1956
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.5, pp.59-69; 1957
Abstract: After the samples of vertebral compositions from 1951 to 1953 were classified into two types applying the X²-method to each sample as reported formerly, the movements of sardine shoals were deduced owing to the relations between each type, by discussing them in each sea region and in each year class using the X²-comparison. On the other hand, the deduction of the movements was tried to find from the catch of each year in each sea region from 1951 to 1954, and it was compared with the above mentioned deduction. The results obtained from the X²-comparison are as follows. 1. In each year: (1) the year class of 1951 and 1952 are both intimate in "Saikai with Nankai," in "Saikai with Tokai", but not the year class of 1953 in" Saikai with Nankai", in O year fish. (2) the year class of 1950 and 1951 are both intimate in" Saikai with Nankai", in" Nankai with Tokai," in 1 year fish. (3) the movement of the year class of 1950 is different from that of 1951 in 2≤ year fish. 2. In the same year classes: (1) growing from year to 1 year fish, there are movement from Saikai to Nankai and the stay at Nankai and Tokai. (2) growing from 1 year to 2≤ year fish, there is movement from Nankai to Saikai. 3. The points of agreement with both methods to deduce from the X²-comparison and from the catches are as follows: (1) in the year class of 1951, the movements from Nankai to Saikai, is found between 1 and 2≤ year fish. (2) in the year class of 1952, the movemen t from Saikai to Nankai is noticed between O and 1 year fish. / (1)O年魚は昭和26・27年級では西海:南海,西海:東海が近縁,昭和28年には西海:南海が疎縁。(2)1年魚は昭和25・26年級では西海:南海,南海:東海が近縁。(3)2年魚は昭和25年級と26年級とは異る。2.異年同年級間では,(1)0年魚から1年魚にかけては,西海から南海へ移動,東海・南海では滞留する。(2)1年魚から2年魚以上にかけては,南海から西海に移動する。3.漁獲尾数からの推定とx2比較の結果との一致点は次の様である。(1)昭和26年級では,1年魚から2年以上魚にかけて南海から西海へ移動し,(2)昭和27年級では,0年魚から1年魚にかけて西海から南海へ移動する。
URI: http://hdl.handle.net/10069/31962
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第5号

Citable URI : http://hdl.handle.net/10069/31962

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