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ID 114119
Title Alternative
FISH DIVERSITY DETECTION AT THE INNER PART OF OSAKA BAY USING ENVIRONMENTAL DNA ANALYSIS
Author
Kamimura, Satomi
Otani, Sosuke
Iwami, Kazuki
Tanabe, Naoki
Keywords
eDNA
Amagasaki canal
MiFish
fish diversity
Content Type
Journal Article
Description
大阪湾奥に位置する尼崎運河において,環境DNA調査と捕獲調査を比較して運河内スケールにおける環境DNAの有効性と問題点を検討し,各調査地点の魚類相の比較および環境条件との関連を明らかにした.東堀では1月の表層のORPやDOが回復し,同時期の環境DNAにより検出された種数が最も多かった.このことから,この場所が水質の回復によって魚類の利用場所となるポテンシャルを持っている可能性が示唆された.環境DNA調査はより環境の異なる港湾との比較や季節変化については差の検出が可能であった.環境DNA調査は検出は不安定で,検出できない種もあるが,採捕調査よりも多くの魚種を検出する傾向にあり,直接採捕の調査と合わせると互いの調査方法の結果を補い,魚類相全体の把握に有効な手法であると考えられる.
Description Alternative
Fish diversity at at Amagasaki canal in the Inner Part of Osaka Bay were investigated by environmental DNA analysis (eDNA) to clarify whether this method is valuable in eutrophic conditions. A ORP and DO was restored in January in Higashi-bori sampling point and the detected fish species was larger number than the other time. The result suggests that Higashi-bori has a potential for fish habitat with a water quality recovery. The number of detected species and fish fauna suggests that eDNA is efficient in comparison among sampling points which has sharp contrast of environmental factors and monitoring seasonal difference. The eDNA is unable to detected a certain species, but allow to detect larger number of species than the conventional sampling methods. eDNA is most effective when used in conjunction with conventional sampling method for investigation of fish diversity.
Journal Title
土木学会論文集B2(海岸工学)
ISSN
18838944
Publisher
土木学会
Volume
75
Issue
2
Start Page
I_1171
End Page
I_1176
Published Date
2019
Rights
© 2019 公益社団法人 土木学会
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
jpn
TextVersion
Publisher
departments
Research Center for Management of Disaster and Environment