Larval output from barnacles, <i>Amphibalanus amphitrite</i>, settled on a test plate in the Hyogo Canal (Shinkawa), Kobe, Japan.

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  • 神戸市兵庫運河（新川）に垂下した試験板上のタテジマフジツボから供給される幼生数の推定
  • コウベシ ヒョウゴ ウンガ シンカワ ニ スイカ シタ シケンバン ジョウ ノ タテジマフジツボ カラ キョウキュウ サレル ヨウセイスウ ノ スイテイ

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Description

Barnacles have been recognized as fouling organisms for a long time. Adhering to ship hulls, piers, wharves and cooling-water pipes of power stations, they cause significant industrial damage. Nonetheless, barnacle nauplius larvae constitute a significant food source for the larvae and juveniles of various animal species in the coastal ecosystem. In order to evaluate the contribution of fouling barnacles to this larval output, every two weeks in 2008, the author examined the number of brooded eggs of barnacles settled on a test plate hung in the water in the Hyogo Canal, Kobe. Measurements of sea water temperature and salinity at the observation site, the density of barnacle nauplii in the plankton, and the number of settled barnacles on the test plate were made. The number of nauplius larvae hatched from the barnacles settled on the test plate was thereby estimated to be 100,000/cm2 over the whole year.

Journal

  • Sessile Organisms

    Sessile Organisms 27 (2), 73-76, 2010

    THE SESSILE ORGANISMS SOCIETY OF JAPAN

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