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Environmental DNA as a ‘Snapshot’ of Fish Distribution: A Case Study of Japanese Jack Mackerel in Maizuru Bay, Sea of Japan

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Title: Environmental DNA as a ‘Snapshot’ of Fish Distribution: A Case Study of Japanese Jack Mackerel in Maizuru Bay, Sea of Japan
Authors: Yamamoto, Satoshi Browse this author
Minami, Kenji Browse this author
Fukaya, Keiichi Browse this author
Takahashi, Kohji Browse this author
Sawada, Hideki Browse this author
Murakami, Hiroaki Browse this author
Tsuji, Satsuki Browse this author
Hashizume, Hiroki Browse this author
Kubonaga, Shou Browse this author
Horiuchi, Tomoya Browse this author
Hongo, Masamichi Browse this author
Nishida, Jo Browse this author
Okugawa, Yuta Browse this author
Fujiwara, Ayaka Browse this author
Fukuda, Miho Browse this author
Hidaka, Shunsuke Browse this author
Suzuki, Keita W. Browse this author
Miya, Masaki Browse this author
Araki, Hitoshi Browse this author →KAKEN DB
Yamanaka, Hiroki Browse this author
Maruyama, Atsushi Browse this author
Miyashita, Kazushi Browse this author
Masuda, Reiji Browse this author
Minamoto, Toshifumi Browse this author
Kondoh, Michio Browse this author
Issue Date: 2-Mar-2016
Publisher: Public Library of Science
Journal Title: PLoS One
Volume: 11
Issue: 3
Start Page: 0149786
Publisher DOI: 10.1371/journal.pone.0149786
Abstract: Recent studies in streams and ponds have demonstrated that the distribution and biomass of aquatic organisms can be estimated by detection and quantification of environmental DNA (eDNA). In more open systems such as seas, it is not evident whether eDNA can represent the distribution and biomass of aquatic organisms because various environmental factors (e.g., water flow) are expected to affect eDNA distribution and concentration. To test the relationships between the distribution of fish and eDNA, we conducted a grid survey in Maizuru Bay, Sea of Japan, and sampled surface and bottom waters while monitoring biomass of the Japanese jack mackerel (Trachurus japonicus) using echo sounder technology. A linear model showed a high R2 value (0.665) without outlier data points, and the association between estimated eDNA concentrations from the surface water samples and echo intensity was significantly positive, suggesting that the estimated spatial variation in eDNA concentration can reflect the local biomass of the jack mackerel. We also found that a bestfit model included echo intensity obtained within 10–150 m from water sampling sites, indicating that the estimated eDNA concentration most likely reflects fish biomass within 150 min the bay. Although eDNA from a wholesale fish market partially affected eDNA concentration, we conclude that eDNA generally provides a ‘snapshot’ of fish distribution and biomass in a large area. Further studies in which dynamics of eDNA under field conditions (e.g., patterns of release, degradation, and diffusion of eDNA) are taken into account will provide a better estimate of fish distribution and biomass based on eDNA.
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒木 仁志

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