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Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan.

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Title: Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan.
Authors: Kodama, Taketoshi1 takekodama@affrc.go.jp, Wagawa, Taku1, Ohshimo, Seiji2,3, Morimoto, Haruyuki1, Iguchi, Naoki1, Fukudome, Ken‐Ichi1,4, Goto, Tsuneo1, Takahashi, Motomitsu3, Yasuda, Tohya3
Source: Fisheries Oceanography. Jul2018, Vol. 27 Issue 4, p289-301. 13p.
Subject Terms: *SARDINOPS sagax, *PHYTOPLANKTON, *ALGAL blooms, *PRIMARY productivity (Biology)
Geographic Terms: SEA of Japan
Abstract: Abstract: To evaluate the impact of temporal variation of primary productivity on the recruitment of Japanese sardine (Sardinops melanostictus) in the Sea of Japan, the phenology of sea surface phytoplankton abundance was estimated from 8 day multiple satellite (SeaWiFS, MODIS‐Aqua, MERIS, and VIIRS) derived sea surface chlorophyll (SSChl) a concentrations from January 1998 to December 2015. Because relationships between SSChl a and in situ chlorophyll a concentrations were significantly different among periods based on the satellite combinations used, maximum and minimum SSChl a concentrations of 1 year were relativized as 1 and 0, respectively. Spatio‐temporal variation of relativized SSChl a concentrations was determined by using empirical orthogonal function (EOF) analysis. Scores in the first EOF mode denoted the basin‐scale variations of SSChl a concentrations in the Sea of Japan, and the major peak from the end of February to the end of May displayed the spring bloom. The logarithm of recruitment per spawner (LNRPS) for sardine was positively affected by delays in the start and end dates of the spring phytoplankton bloom. The delay of the date of the lowest sea surface temperature contributed to the delay of the end of the spring bloom during the period 1998–2015 and elevated the LNRPS during the period 1982–2015. Sardine spawns in the southern Sea of Japan from April to May, hence, delays of the spring bloom prolonged its overlap with sardine larval periods, and thus improved the recruitment of Japanese sardine in the Sea of Japan. [ABSTRACT FROM AUTHOR]
Copyright of Fisheries Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan.
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  Data: <searchLink fieldCode="AR" term="%22Kodama%2C+Taketoshi%22">Kodama, Taketoshi</searchLink><relatesTo>1</relatesTo><i> takekodama@affrc.go.jp</i><br /><searchLink fieldCode="AR" term="%22Wagawa%2C+Taku%22">Wagawa, Taku</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ohshimo%2C+Seiji%22">Ohshimo, Seiji</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Morimoto%2C+Haruyuki%22">Morimoto, Haruyuki</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Iguchi%2C+Naoki%22">Iguchi, Naoki</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fukudome%2C+Ken‐Ichi%22">Fukudome, Ken‐Ichi</searchLink><relatesTo>1,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Goto%2C+Tsuneo%22">Goto, Tsuneo</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Takahashi%2C+Motomitsu%22">Takahashi, Motomitsu</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Yasuda%2C+Tohya%22">Yasuda, Tohya</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Fisheries+Oceanography%22">Fisheries Oceanography</searchLink>. Jul2018, Vol. 27 Issue 4, p289-301. 13p.
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  Data: *<searchLink fieldCode="DE" term="%22SARDINOPS+sagax%22">SARDINOPS sagax</searchLink><br />*<searchLink fieldCode="DE" term="%22PHYTOPLANKTON%22">PHYTOPLANKTON</searchLink><br />*<searchLink fieldCode="DE" term="%22ALGAL+blooms%22">ALGAL blooms</searchLink><br />*<searchLink fieldCode="DE" term="%22PRIMARY+productivity+%28Biology%29%22">PRIMARY productivity (Biology)</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22SEA+of+Japan%22">SEA of Japan</searchLink>
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  Label: Abstract
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  Data: Abstract: To evaluate the impact of temporal variation of primary productivity on the recruitment of Japanese sardine (Sardinops melanostictus) in the Sea of Japan, the phenology of sea surface phytoplankton abundance was estimated from 8 day multiple satellite (SeaWiFS, MODIS‐Aqua, MERIS, and VIIRS) derived sea surface chlorophyll (SSChl) a concentrations from January 1998 to December 2015. Because relationships between SSChl a and in situ chlorophyll a concentrations were significantly different among periods based on the satellite combinations used, maximum and minimum SSChl a concentrations of 1 year were relativized as 1 and 0, respectively. Spatio‐temporal variation of relativized SSChl a concentrations was determined by using empirical orthogonal function (EOF) analysis. Scores in the first EOF mode denoted the basin‐scale variations of SSChl a concentrations in the Sea of Japan, and the major peak from the end of February to the end of May displayed the spring bloom. The logarithm of recruitment per spawner (LNRPS) for sardine was positively affected by delays in the start and end dates of the spring phytoplankton bloom. The delay of the date of the lowest sea surface temperature contributed to the delay of the end of the spring bloom during the period 1998–2015 and elevated the LNRPS during the period 1982–2015. Sardine spawns in the southern Sea of Japan from April to May, hence, delays of the spring bloom prolonged its overlap with sardine larval periods, and thus improved the recruitment of Japanese sardine in the Sea of Japan. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Fisheries Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/fog.12252
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 289
    Subjects:
      – SubjectFull: SEA of Japan
        Type: general
      – SubjectFull: SARDINOPS sagax
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      – SubjectFull: PHYTOPLANKTON
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      – SubjectFull: ALGAL blooms
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      – SubjectFull: PRIMARY productivity (Biology)
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            – D: 01
              M: 07
              Text: Jul2018
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              Y: 2018
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