Effect of water temperature and fish biomass on environmental DNA shedding, degradation, and size distribution

• Jo, Toshiaki

• Murakami, Hiroaki

• 山本, 哲史

• Masuda, Reiji

• 源, 利文

抄録

Environmental DNA (eDNA) analysis has successfully detected organisms in various aquatic environments. However, there is little basic information on eDNA, including the eDNA shedding and degradation processes. This study focused on water temperature and fish biomass and showed that eDNA shedding, degradation, and size distribution varied depending on water temperature and fish biomass. The tank experiments consisted of four temperature levels and three fish biomass levels. The total eDNA and size-fractioned eDNA from Japanese Jack Mackerels (Trachurus japonicus) were quantified before and after removing the fish. The results showed that the eDNA shedding rate increased at higher water temperature and larger fish biomass, and the eDNA decay rate also increased at higher temperature and fish biomass. In addition, the small-sized eDNA fractions were proportionally larger at higher temperatures, and these proportions varied among fish biomass. After removing the fish from the tanks, the percentage of eDNA temporally decreased when the eDNA size fraction was >10 mu m, while the smaller size fractions increased. These results have the potential to make the use of eDNA analysis more widespread in the future.

収録刊行物

• Ecology and Evolution

  Ecology and Evolution 9 (3), 1135-1146, 2019-02

  Wiley

キーワード

• decay rate
• environmental DNA
• fish biomass
• Japanese Jack Mackerel (Trachurus japonicus)
• quantitative real-time PCR
• shedding rate
• size distribution
• water temperature

詳細情報

• CRID: 1050856995323245184
• NII論文ID: 120006601540
• ISSN: 20457758
• HANDLE: 20.500.14094/90005786
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles