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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  kyouindb  KAKEN_id
Minami, Kenji
Fukaya, Keiichi
Takahashi, Kohji
Sawada, Hideki  kyouindb  KAKEN_id  orcid (unconfirmed)
Murakami, Hiroaki
Tsuji, Satsuki
Hashizume, Hiroki
Kubonaga, Shou
Horiuchi, Tomoya
Hongo, Masamichi
Nishida, Jo
Okugawa, Yuta
Fujiwara, Ayaka
Fukuda, Miho
Hidaka, Shunsuke
Suzuki, Keita W.
Miya, Masaki
Araki, Hitoshi
Yamanaka, Hiroki
Maruyama, Atsushi
Miyashita, Kazushi
Masuda, Reiji  kyouindb  KAKEN_id  orcid (unconfirmed)
Minamoto, Toshifumi
Kondoh, Michio
Author's alias: 益田, 玲爾
Issue Date: 2-Mar-2016
Publisher: Public Library of Science
Journal title: PLOS ONE
Volume: 11
Issue: 3
Thesis number: e0149786
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 m in 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.
Description: 海水中のDNA情報で魚群の居場所と規模を明らかに -魚類の量・分布・変動を把握し、漁業へ生かす-. 京都大学プレスリリース. 2016-03-03.
Rights: © 2016 Yamamoto et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
DOI(Published Version): 10.1371/journal.pone.0149786
PubMed ID: 26933889
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