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 s.l. 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 time-weighted average density increased 3.5 fold, from 1.1 to 3.9 ephyrae m−3, and the integrated number of ephyrae exported from the port increased 4.3 fold, from 5.7 × 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 blooms.
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Arai MN (2001) Pelagic coelenterates and eutrophication: a review. Hydrobiologia 451:69–87
Attrill MJ, Wright J, Edwards M (2007) Climate-related increases in jellyfish frequency suggest a more gelatinous future for the North Sea. Limnol Oceangr 52:480–485
Brotz L, Cheung WWL, Kleisner K, Pakhomov E, Pauly D (2012) Increasing jellyfish populations: trends in Large Marine Ecosystems. Hydrobiologia 690:3–20
Condon RH, Duarte CM, Pitt KA, Robinson KL, Lucas CH, Sutherland KR, Mianzan HW, Bogeberg M, Purcell JE, Decker MB, Uye S-I, Madin LP, Brodeur RD, Haddock SHD, Malej A, Parry GD, Eriksen E, Quiñones J, Acha M, Harvey M, Arthur JM, Graham WM (2013) Recurrent jellyfish blooms are a consequence of global oscillations. P Natl Acad Sci USA 110:1000–1005
Dawson MN (2003) Macro-morphological variation among cryptic species of the moon jellyfish, Aurelia (Cnidaria: Scyphozoa). Mar Biol 143:369–379
Dawson MN, Martin LE (2001) Geographic variation and ecological adaptation in Aurelia (Scyphozoa, Semaeostomeae): some implications from molecular phylogenetics. Hydrobiologia 451:259–273
Duarte CM, Pitt KA, Lucas CH, Purcell JE, Uye S, Robinson K, Brotz L, Decker MB, Sutherland KR, Malej A, Madin L, Mianzan H, Gili J-M, Fuentes V, Atienza D, Pagés F, Breitburg D, Malek J, Graham WM, Condon RH (2013) Is global ocean sprawl a cause of jellyfish bloom? Front Ecol Environ 11:91–97
Han C-H, Uye S (2010) Combined effects of food supply and temperature on asexual reproduction and somatic growth of polyps of the common jellyfish Aurelia aurita s.l. Plankton Benthos Res 5:98–105
Hernroth L, Gröndahl F (1985) On the biology of Aurelia aurita (L.): 2. Major factors regulating the occurrence of ephyrae and young medusae in the Gullmar Fjord, western Sweden. Bull Mar Sci 37:567–576
Holst S (2012) Effects of climate warming on strobilation and ephyra production of North Sea scyphozoan jellyfish. Hydrobiologia 690:127–140
Hoover RA, Purcell JE (2009) Substrate preferances of scyphozoan Aurelia labiata polyps among common dock-building materials. Hydrobiologia 616:259–267
Hoover RA, Armour R, Dow I, Purcell JE (2012) Nudibranch predation and dietary preference for the polyps of Aurelia labiata (Cnidaria: Scyphozoa). Hydrobiologia 69:199–213
Ishii H, Katsukoshi K (2010) Seasonal and vertical distribution of Aurelia aurita polyps on a pylon in the innermost part of Tokyo Bay. J Oceanogr 66:329–336
Janben H, Augustin CB, Hinrichsen HH, Kube S (2013) Impact of secondary hard substrate on the distribution and abundance of Aurelia aurita in the western Baltic Sea. Mar Poll Bull 75:224–234
Kakinuma Y (1962) On some factors for the differentiations of Cladonema uchidai and of Aurelia aurita. Bull Mar Biol Stat Asamushi 11:81–85
Kamiyama T (2011) Planktonic ciliates as a food source for the scyphozoan Aurelia aurita (s.l.): feeding activity and assimilation of the polyp stage. J Exp Mar Biol Ecol 407:207–215
Kogovsek T, Bogunovic B, Malej A (2010) Recurrence of bloom-forming scyphomedusae: wavelet analysis of a 200-year time series. Hydrobiologia 645:81–96
Lo WT, Purcell JE, Hung J-J, Su H-M, Hsu P-K (2008) Enhancement of jellyfish (Aurelia aurita) populations by extensive aquaculture rafts in a coastal lagoon in Taiwan. ICES J Mar Sci 65:453–461
Lucas CH (2001) Reproduction and life history strategies of the common jellyfish, Aurelia aurita, in relation to its ambient environment. Hydrobiologia 451:229–246
Lucas CH, Graham WM, Widmer C (2012) Jellyfish life histories: role of polyps in forming and maintaining scyphomedusa populations. Adv Mar Biol 63:133–196
Malej A, Kogovsek T, Ramsak A, Gatenacci L (2012) Blooms and population dynamics of moon jellyfish in the northern Adriatic. Cah Biol Mar 53:337–342
Miyake H, Terazaki M, Kakinuma Y (2002) On the polyps of the common jellyfish Aurelia aurita in Kagoshima Bay. J Oceanogr 58:451–459
Möller H (1980) Scyphomedusae as predators and food competitors of larval fish. Meeresforschung 28:90–100
Okaichi T, Yanagi T (1997) Sustainable development in the Seto Inland Sea, Japan. Okaichi T, Yanagi T (eds) Terra Scientific Publishing Company, Tokyo
Purcell JE (2012) Jellyfish and ctenophore blooms coincide with human proliferations and environmental perturbations. Annu Rev Mar Sci 4:209–235
Purcell JE, Uye S, Lo WT (2007) Anthropogenic causes of jellyfish blooms and direct consequences for humans: a review. Mar Ecol Prog Ser 350:153–174
Purcell JE, Hoover RA, Schwarck NT (2009) Interannual variation of strobilation of the scyphozoan Aurelia labiata in relation to polyp density, temperature, salinity, and light conditions. Mar Ecol Prog Ser 375:139–149
Richardson AJ, Bakun A, Hays GC, Gibbons MJ (2009) The jellyfish joyride: causes, consequences and management responses to a more gelatinous future. Trends Ecol Evol 24:312–322
Shoji J, Kudoh T, Takatsuji H, Kawaguchi O, Kasai A (2010) Distribution of moon jellyfish Aurelia aurita in relation to summer hypoxia in Hiroshima Bay, Seto Inland Sea. Estuar Coast Shelf Sci 86:485–490
Takao M, Okawachi H, Uye S (2014) Natural predators of polyps of Aurelia aurita s.l. (Cnidaria: Scyphozoa: Semaeostomeae) and their predation rates. Plankton Benthos Res 9:71–79
Takeoka H (1989) Physical model of oxygen-deficient water formation. Engan Kaiyo Kenkyu Note 26:101–108 (in Japanese with English abstract)
Takeoka H (2002) Progress in Seto Inland Sea research. J Oceanogr 58:93–107
Thein H, Ikeda H, Uye S (2012) The potential role of podocysts in perpetuation of the common jellyfish Aurelia aurita s.l. (Cnidaria: Scyphozoa) in anthropogenically perturbed coastal waters. Hydrobiologia 690:157–167
Toyokawa M, Aoki K, Yamada S, Yasuda A, Murata Y, Kikuchi T (2011) Distribution of ephyrae and polyps of jellyfish Aurelia aurita (Linnaeus 1758) sensu lato in Mikawa Bay, Japan. J Ocenogr 67:209–218
Uye S (2011) Human forcing of the copepod-fish-jellyfish triangular trophic relationship. Hydrobiologia 666:71–83
Uye S, Shimauchi H (2005) Population biomass, feeding, respiration and growth rates, and carbon budget of the scyphomedusa Aurelia aurita in the Inland Sea of Japan. J Plankton Res 27:237–248
Uye S, Ueta U (2004) Recent increase of jellyfish populations and their nuisance to fisheries in the Inland Sea of Japan. Suisan Kaiyo Kenkyu 68:9–19 (in Japanese with English abstract)
Uye S, Fujii N, Takaoka H (2003) Unusual aggregations of the scyphomedusa Aurelia aurita in coastal waters along western Shikoku, Japan. Plankton Biol Ecol 50:17–21
Willcox S, Moltschaniwskyj N, Crawford C (2008) Population dynamics of natural colonies of Aurelia sp. scyphistomae in Tasmania. Australia. Mar Biol 154:661–670
Yamamoto T (2003) The Seto Inland Sea—eutrophic or oligotrophic? Mar Pollut Bull 47:1–6
We 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 L-shaped 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 (Japan-Slovenia bilateral project on jellyfish blooms).
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Makabe, R., Furukawa, R., Takao, M. et al. Marine artificial structures as amplifiers of Aurelia aurita s.l. blooms: a case study of a newly installed floating pier. J Oceanogr 70, 447–455 (2014). https://doi.org/10.1007/s10872-014-0249-1
- Artificial structures
- Seeding grounds