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Spatio-temporal distribution of environmental DNA derived from Japanese sea nettle jellyfish Chrysaora pacifica in Omura Bay, Kyushu, Japan


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Title: Spatio-temporal distribution of environmental DNA derived from Japanese sea nettle jellyfish Chrysaora pacifica in Omura Bay, Kyushu, Japan
Authors: Takasu, Hiroyuki / Inomata, Haruka / Uchino, Koji / Tahara, Saki / Mori, Koichiro / Hirano, Yuna / Harada, Kana / Yamaguchi, Masahiro / Nozoe, Yuichi / Akiyama, Hisashi
Issue Date: 25-Nov-2019
Publisher: Plankton Society of Japan / 日本プランクトン学会
Citation: Plankton and Benthos Research, 14(4), pp.320-323; 2019
Abstract: We surveyed the spatial and temporal distribution of Japanese sea nettle jellyfish Chrysaora pacifica in Omura Bay, Japan, using an environmental DNA (eDNA) method. In 2018, the C. pacifica eDNA concentration increased from March–May at all depths. The seasonal pattern of C. pacifica eDNA was consistent with previous reports based on visual observations along the Japanese coast. Thus, the eDNA method might have advantages to follow the seasonal pattern of C. pacifica while being less time-consuming and less laborious compared with traditional methods. The eDNA concentrations tended to reach a maximum near and/or below the pycnocline throughout this study. Therefore, the vertical distribution of C. pacifica medusae may have been restricted by strong pycnocline formation in July and August 2018. However, even with a weak pycnocline, which C. pacifica should be able to swim across, the apparent distribution of C. pacifica eDNA seems to be restricted by the pycnocline. Therefore, the eDNA method cannot, currently, accurately assess the absolute vertical distribution pattern of C. pacifica, especially when a pycnocline is formed.
Keywords: Chrysaora pacifica / Environmental DNA / Jellyfish / Omura Bay
URI: http://hdl.handle.net/10069/39576
ISSN: 18808247
DOI: 10.3800/pbr.14.320
Rights: © 2019 The Plankton Society of Japan
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/39576

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