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Title of Journal: J Oceanogr

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Abbravation: Journal of Oceanography

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Springer Japan

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DOI

10.1016/0032-3861(77)90221-x

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ISSN

1573-868X

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Marine artificial structures as amplifiers of Emp

Authors: Ryosuke Makabe Ryuji Furukawa Mariko Takao Shinichi Uye
Publish Date: 2014/10/01
Volume: 70, Issue: 5, Pages: 447-455
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Abstract

Increase of marine artificial structures providing more substrate for jellyfish polyps has been argued to increase jellyfish outbreaks although no explicit evidence exists We report a case study demonstrating a remarkable increase of Aurelia aurita sl ephyrae after the installation of a floating pier 48 × 6 m in a fishing port on the Inland Sea of Japan Monitoring of ephyrae from January 2010 prior to the installation of the floating pier in April 2010 to July 2011 revealed that their timeweighted average density increased 35 fold from 11 to 39 ephyrae m−3 and the integrated number of ephyrae exported from the port increased 43 fold from 57 × 106 to 25 × 106 ephyrae after the installation However in a nearby port a control site the abundance of ephyrae decreased by ca one third during the same period Monitoring of polyps showed that they initially colonized the undersurface of the pier by August 2010 followed by a rapid population increase They strobilated from December 2010 to May 2011 We computed the number of ephyrae released from the strobilae to be ca 25 × 106 very close to the net increase of ephyrae produced and exported from the port This study corroborates that the installation of an artificial structure provides new a substrate for polyps which allows them to produce more ephyrae to induce medusa bloomsWe thank H Takeoka A Malej and T Kogovsek for comments on our study and JF Japan Fisheries Cooperatives Kuba for supporting this survey Our gratitude is extended to S Nakai for his kind assistance in designing and manufacturing the Lshaped frame used in monitoring the undersurface of the pier This study was partially supported by grants from the Agriculture Forestry and Fisheries Research Council Japan project name STOPJELLY and from the Japan Society for the Promotion of Science JapanSlovenia bilateral project on jellyfish blooms

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  2. Deep-sea meiofauna off the Pacific coast of Tohoku and other trench slopes around Japan: a comparative study before and after the 2011 off the Pacific coast of Tohoku Earthquake
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  5. Seasonal variability of phytoplankton community structure in the subtropical western North Pacific
  6. A piecewise curve-fitting technique for vertical oceanographic profiles and its application to density distribution
  7. Further evidence for non-reemergence of winter SST anomalies in the North Pacific eastern subtropical mode water area
  8. Role of environment and hydrography in determining the picoplankton community structure of Sagami Bay, Japan
  9. A Zonal Pathway for NADW in the South Atlantic
  10. Has the upper portion of the Japan Sea Proper Water formation really been enhancing?
  11. Structure and Transport of the Agulhas Current and Its Temporal Variability
  12. Assessment of turbulence closure models for resonant inertial response in the oceanic mixed layer using a large eddy simulation model
  13. Effect of the along-strait wind on the volume transport through the Tsushima/Korea Strait in September
  14. Interannual variability of Pacific Winter Water inflow through Barrow Canyon from 2000 to 2006
  15. Effects of seawater acidification on hydrolytic enzyme activities
  16. Significant contribution of lytic mortality to bacterial production and DOC cycles in Funka Bay, Japan
  17. Measurement of Noble Gas Solubility in Seawater Using a Quadrupole Mass Spectrometer
  18. Microbial biomass in the Eutrophic Bay of Shimoda as compared by estimations of several biomass parameters
  19. Impact of atmospheric and physical forcings on biogeochemical cycling of dissolved oxygen and nutrients in the coastal Bay of Bengal
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  23. Interannual variability of the North Pacific Subtropical Countercurrent: role of local ocean–atmosphere interaction
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