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Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan

Outbreaks of moon jellyfish Aurelia spp. are frequently reported from many parts of the world’s coastal areas. Aurelia spp. canonically show a metagenetic life cycle in which planulae transform into sessile polyps, which can drastically increase in number through asexual reproduction. Therefore, the...

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Autores principales: Suzuki, Kentaro S., Suzuki, Keita W., Kumakura, Emi, Sato, Kana, Oe, Yutaro, Sato, Tasuku, Sawada, Hideki, Masuda, Reiji, Nogata, Yasuyuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6872181/
https://www.ncbi.nlm.nih.gov/pubmed/31751435
http://dx.doi.org/10.1371/journal.pone.0225513
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author Suzuki, Kentaro S.
Suzuki, Keita W.
Kumakura, Emi
Sato, Kana
Oe, Yutaro
Sato, Tasuku
Sawada, Hideki
Masuda, Reiji
Nogata, Yasuyuki
author_facet Suzuki, Kentaro S.
Suzuki, Keita W.
Kumakura, Emi
Sato, Kana
Oe, Yutaro
Sato, Tasuku
Sawada, Hideki
Masuda, Reiji
Nogata, Yasuyuki
author_sort Suzuki, Kentaro S.
collection PubMed
description Outbreaks of moon jellyfish Aurelia spp. are frequently reported from many parts of the world’s coastal areas. Aurelia spp. canonically show a metagenetic life cycle in which planulae transform into sessile polyps, which can drastically increase in number through asexual reproduction. Therefore, their asexual reproduction has been recognized as one of the major causes of the outbreaks. Aurelia spp. also show direct development that lacks asexual reproduction during the polyp stage, which prevents us from understanding the mechanisms of its outbreaks. To clarify the seasonality of the metagenetic and direct-development life cycles of Aurelia sp. in Maizuru Bay, Japan, we conducted field observations and laboratory experiments throughout the year. Additionally, the two life cycle types were genetically analyzed to confirm that they belong to the single species Aurelia coerulea, which dominates in coastal waters in Japan. From July until October, Aurelia coerulea produced smaller eggs and planulae all of which developed into polyps. However, from December until May, larger eggs and planulae were produced and 90% of the planulae developed into planktonic ephyrae bypassing the sessile polyp stage. Our results demonstrated that a single species, A. coerulea, seasonally shifts between their two life cycle types at a water temperature threshold of 20°C in Maizuru Bay. The higher energy storage of larger planulae was suggested to enable the planulae to develop into ephyrae without external energy input through feeding during the polyp stage. The adaptive significances of the two life cycle types were also discussed.
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spelling pubmed-68721812019-12-07 Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan Suzuki, Kentaro S. Suzuki, Keita W. Kumakura, Emi Sato, Kana Oe, Yutaro Sato, Tasuku Sawada, Hideki Masuda, Reiji Nogata, Yasuyuki PLoS One Research Article Outbreaks of moon jellyfish Aurelia spp. are frequently reported from many parts of the world’s coastal areas. Aurelia spp. canonically show a metagenetic life cycle in which planulae transform into sessile polyps, which can drastically increase in number through asexual reproduction. Therefore, their asexual reproduction has been recognized as one of the major causes of the outbreaks. Aurelia spp. also show direct development that lacks asexual reproduction during the polyp stage, which prevents us from understanding the mechanisms of its outbreaks. To clarify the seasonality of the metagenetic and direct-development life cycles of Aurelia sp. in Maizuru Bay, Japan, we conducted field observations and laboratory experiments throughout the year. Additionally, the two life cycle types were genetically analyzed to confirm that they belong to the single species Aurelia coerulea, which dominates in coastal waters in Japan. From July until October, Aurelia coerulea produced smaller eggs and planulae all of which developed into polyps. However, from December until May, larger eggs and planulae were produced and 90% of the planulae developed into planktonic ephyrae bypassing the sessile polyp stage. Our results demonstrated that a single species, A. coerulea, seasonally shifts between their two life cycle types at a water temperature threshold of 20°C in Maizuru Bay. The higher energy storage of larger planulae was suggested to enable the planulae to develop into ephyrae without external energy input through feeding during the polyp stage. The adaptive significances of the two life cycle types were also discussed. Public Library of Science 2019-11-21 /pmc/articles/PMC6872181/ /pubmed/31751435 http://dx.doi.org/10.1371/journal.pone.0225513 Text en © 2019 Suzuki et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Suzuki, Kentaro S.
Suzuki, Keita W.
Kumakura, Emi
Sato, Kana
Oe, Yutaro
Sato, Tasuku
Sawada, Hideki
Masuda, Reiji
Nogata, Yasuyuki
Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan
title Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan
title_full Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan
title_fullStr Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan
title_full_unstemmed Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan
title_short Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan
title_sort seasonal alternation of the ontogenetic development of the moon jellyfish aurelia coerulea in maizuru bay, japan
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6872181/
https://www.ncbi.nlm.nih.gov/pubmed/31751435
http://dx.doi.org/10.1371/journal.pone.0225513
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