Sessile Organisms
Online ISSN : 1883-4701
Print ISSN : 1342-4181
ISSN-L : 1342-4181
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Volume 37, Issue 2
Displaying 1-2 of 2 articles from this issue
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Original Article
  • Styela plicata (Lesueur, 1823) (Urochordata: Ascidiacea) from Ofunato Bay, Iwate Prefecture; first cool-temperate records from the Japanese Pacific coast
    Teruaki Nishikawa, Keiko Shimizu, Ryusuke Kado
    2020 Volume 37 Issue 2 Pages 25-29
    Published: December 25, 2020
    Released on J-STAGE: December 19, 2020
    DOIhttps://doi.org/10.4282/sosj.37.25
    JOURNAL FREE ACCESS
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    The ascidian Styela plicata (Lesueur, 1823), which to date has been recorded from mid-temperate to tropical waters along the Japanese Pacific coast, from mid- and warm-temperate waters along the Sea of Japan coast, with northern limits in Tokyo Bay and Mutsu Bay, respectively, and from the mid-temperate Seto Inland Sea, was collected for the first time in 2019 from cool-temperate Ofunato Bay, Iwate Prefecture, further north of Tokyo Bay on the Pacific coast. Furthermore, hearsay evidence indicates that the ascidian has been observed on aquaculture equipment in Ofunato Bay since summer of 2017, following the 2016 introduction of the oyster Crassostrea nippona to the bay from Akita Prefecture for aquaculture. Long-term viability of the Ofunato Bay population of S. plicata now appears likely, indicating tolerance to winter water temperatures (to ca. 6°C), and a potential threat to local aquaculture.

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