Journal of the Oceanographical Society of Japan
Online ISSN : 2186-3113
Print ISSN : 0029-8131
ISSN-L : 0029-8131
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Volume 25, Issue 3
Displaying 1-4 of 4 articles from this issue
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  • Changes in Electrolytic Conductance of Seawater during Photosynthesis and Respiration
    P. Kilho PARK, Albin L. BRADSHAW, David W. MENZEL, Karl E. SCHLEICHER, ...
    1969 Volume 25 Issue 3 Pages 119-122
    Published: June 30, 1969
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.5928/kaiyou1942.25.119
    JOURNAL FREE ACCESS
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    Common rock weed, Fucus vesiculosis, decreased the seawater conductance by 0.04 percent during a photosynthetic assimilation of 0.4mM of inorganic carbon dioxide, but it only increased the conductance by 0.02 percent during the respiration. Transformation of bicarbonate to carbonate ions during photosynthesis and vice versa during respiration are the main mechanism to change the conductance.
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  • Distribution of Vitamin B12, Thiamine and Biotin in Marine Sediments
    Kouichi OHWADA, Nobuo TAGA
    1969 Volume 25 Issue 3 Pages 123-136
    Published: June 30, 1969
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.5928/kaiyou1942.25.123
    JOURNAL FREE ACCESS
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    Vitamin B12, thiamine and biotin in the sediments collected from different 41 stations at the Eastern China Sea, the Pacific Ocean and the bays and inlet along the Pacific coast of Japan have been determined by microbiological assay methods using Lactobacillus leichmannii, Lactobacillus fermenti and Saccharomyces cerevisiae respectively. Vitamin B12 contents in the surface sediments were rather higher at such a shallow area as the Aburatsubo Inlet (1.14-7.14mμg/g) than those at other areas, the Japan Trench, the Mid-Pacific Ocean, the Eastern China Sea, the Suruga Bay and the Sagami Bay (0-2.10mμg/g). Thiamine contents were similar levels in the sediments at all areas investigated (average of 0.31μg/g), whereas, biotin was more abundant in the sediments at the Mid-Pacific Ocean (average of 5.0mμg/g) than the other areas (average of 2.0mμg/g). Vertical distribution of vitamin concentrations in the cores revealed, in general, the gentle decreasing trends with depth, except for a few irregular fluctuations. In comparing the relationship between vitamin contents and some of the environmental factors in the sediments, significant correlations were observed between vitamin B12 or thiamine contents and values of loss on ignition. On the other hand, there seemed to be no clear relation between biotin contents and values of loss on ignition.
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  • Zooplankton Investigations in the Setonaikai (Inland Sea of Japan), III
    Occurrence of Zooplankton in the Sea Regions from Iyo-nada to Harima-nada in the Autumn of 1964
    Reiichiro HIROTA
    1969 Volume 25 Issue 3 Pages 137-144
    Published: June 30, 1969
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.5928/kaiyou1942.25.137
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    Following 42 species of zooplankton were discriminated at 18 stations in the sea regions from Iyo-nada to Harima-nada, in the autumn of 1964: 3 species of Tunicata, 2 species of Chaetognatha, 1 species of Malacostraca, 31 species of Copepoda, 2 species of Branchiopoda and 3 species of Ciliophora. Among them, Ctenocalanus vanus (Copepoda) was the unrecorded species in the Setonaikai.
    The representative of the zooplankton community in each sea region is generalized as follows: Iyo-nada and Hiroshima Bay .... Oncaea media; Aki-nada, Hiuchi-nada and Bingonada .... Microsetella norvegica (or Microsetella norvegica and Paracalanus parvus); Mizushima-nada, Bisan-seto and Harima-nada .... Oithona nana, with Paracalanus parvus and Microsetella norvegica. There was the close interrelationship between such distribution of the communities and the regional transition of the hydrographical conditions. On the other hand, it seems to be inferred that the influence of the oceanic water was very strong in Hiroshima Bay and Harima-nada, from the occurrence of the oceanic copepods and chaetognath.
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  • Zooplankton Investigations in the Setonaikai (Inland Sea of Japan), IV
    Occurrence of Zooplankton in the Sea Regions from Iyo-nada to Harima-nada in the Winter of 1966
    Reiichiro HIROTA
    1969 Volume 25 Issue 3 Pages 145-150
    Published: June 30, 1969
    Released on J-STAGE: June 17, 2011
    DOIhttps://doi.org/10.5928/kaiyou1942.25.145
    JOURNAL FREE ACCESS
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    22 species of zooplankton, including 2 species of Tunicata, 2 species of chaetognatha, 13 species of Copepoda, 1 species of Branchiopoda and 4 species of Ciliophora, were discriminated at 18 stations in the sea regions from Iyo-nada to Harima-nada, in the winter of 1966.
    From Iyo-nada to Bingo-nada, the representatives of the zooplankton communities changed successively as follows according as the hydrographical conditions became more and more embaymental: Oncaea media → Paracalanus parvus → Oikopleura dioica. But the species composition of the zooplankton communities in Bisan-seto and Harima-nada varied irregularly from station to station.
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