著者

松石 隆 斎藤 和敬 菅野 泰次

出版者

北海道大学水産学部 = FACULTY OF FISHERIES, HOKKAIDO UNIVERSITY

雑誌

北海道大學水産學部研究彙報 (ISSN:00183458)

巻号頁・発行日

vol.46, no.3, pp.53-62, 1995-12

著者

菅野 泰次

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.55, no.4, pp.583-589, 1989-04-25 (Released:2008-02-29)

参考文献数

22

被引用文献数

3 5

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Distinct spawning stocks of herring populations in the Far Eastern waters were examined on their sex ratios, age compositions and initial growth rates.Most populations were the same in regards to their sex ratios, but the Atsuta population showed an unequal ratio suggesting the existence of different ecological properties.Six populations around Hokkaido Island showed lower mean ages but higher growth rates than four northern populations which were 9-11 cm in body length at the first year of life.Variations in the mode of life of ten populations have been classified into the following three ecological types; lake type (spawning in brackish lake and no migration), shore type (spawning in saline shore and narrow migration) and sea type (spawning in shore and extensive migration).Those ecological characteristics seem to be closely associated with dynamics of each population of the herring in the Far Eastern waters.

著者

菅野 泰次 上田 祐司 松石 隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.67, no.1, pp.67-77, 2001-01-15

参考文献数

28

被引用文献数

4 7

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底曳漁獲量からみたマダラの濃密な分布は, 太平洋では北海道の襟裳岬以東の海域, 北海道恵山沖および三陸沖の3つの海域にみられ, 日本海では, 青森・秋田県沖および山形県沖の2つの海域にみられた。月別1曳網当り漁獲量を用いて因子分析を行った結果, 襟裳岬以東海域, 北海道恵山沖および三陸沖の魚群はそれぞれ異なる変動傾向を示す魚群であった。また脊椎骨数の解析から, 襟裳以東海域は他海域より脊椎骨数が有意に多いことが分った。これらの結果と産卵場の知見を考慮すると, 太平洋側海域には襟裳岬以東群, 陸奥湾・恵山沖群および三陸沖群の3つの系群が存在すると結論された。

著者

菅野 泰次 上田 祐司 松石 隆

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.67, no.1, pp.67-77, 2001-01-15 (Released:2008-02-01)

参考文献数

28

被引用文献数

5 7

---

底曳漁獲量からみたマダラの濃密な分布は, 太平洋では北海道の襟裳岬以東の海域, 北海道恵山沖および三陸沖の3つの海域にみられ, 日本海では, 青森・秋田県沖および山形県沖の2つの海域にみられた。月別1曳網当り漁獲量を用いて因子分析を行った結果, 襟裳岬以東海域, 北海道恵山沖および三陸沖の魚群はそれぞれ異なる変動傾向を示す魚群であった。また脊椎骨数の解析から, 襟裳以東海域は他海域より脊椎骨数が有意に多いことが分った。これらの結果と産卵場の知見を考慮すると, 太平洋側海域には襟裳岬以東群, 陸奥湾・恵山沖群および三陸沖群の3つの系群が存在すると結論された。

著者

菅野 泰次

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.48, no.6, pp.755-762, 1982-06-25 (Released:2008-02-29)

参考文献数

26

被引用文献数

1 3

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The population structure of herring in the Okhotsk sea south of 46°N was studied using twenty samples collected from three feeding areas and four spawning areas, and the landings during 13 years in seventeen sections. The relationship of ten samples caught in there feeding areas to spawning stocks were judged by discriminant analysis using VN, γ1, γ2 (see Table 2) as follows: four belong to DeKastri, three belong to Saroma, two mingle in DeKastri, Saroma, Notoro and one belongs to another subpopulation not described above. Four factors which act upon the fluctuation of the landings on seventeen sections were extracted. Two factors had high correlations with the catches of Notoro district and Saroma district. The other two factors had high correlations with each of the landings on two domains in the near side and the far-off side of Hakkaido. From these results, it is assumed that two subpopulations in the Notoro district and Saroma district are independent stocks not mixing with each other being localized in distribution, and a stock in a domain on the near side of Hokkaido is from the DeKastri subpopulation reproduced in the northern Tatal sound.

著者

菅野 泰次

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.55, no.3, pp.441-445, 1989-03-25 (Released:2008-02-29)

参考文献数

17

被引用文献数

1 1

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Geographic and environmental causes of variations in meristic and morphometric characters were examined for the ten herring populations in the Far Eastern waters. A study of the correlations between the characters of each population and the latitude, salinity and water temperature at the spawning grounds showed that five characters of initial growth, upper gill rakers, lower gill rakers, head length-body length relation and predorsal length-body length relation are closely related to the latitude or water temperature, but showed no relation with the salinity in the spawning grounds.Three factors were extracted by factor analysis for the ten morphological characters in populations. One of them which seems to have no correlation with the three environmental properties examined is the factor suggesting genetic differences between the populations. The variations in morphological characteristics may be associated with each population's ecological, adaptitional and quantitative properties during their evolutional courses in the Pacific Ocean.

著者

星野 昇 木下 哲一郎 菅野 泰次

出版者

北海道大学水産学部 = FACULTY OF FISHERIES, HOKKAIDO UNIVERSITY

雑誌

北海道大學水産學部研究彙報 (ISSN:00183458)

巻号頁・発行日

vol.44, no.4, pp.147-157, 1993-11