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Open AccessEditor’s ChoiceArticle

Seasonal Variation and Assessment of Fish Resources in the Yangtze Estuary Based on Environmental DNA

by 1,2,3,4, 1,2,3, 5, 5,6, 4, 1,2,3,* and 1,2,3,5,*
1
CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2
Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
3
Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
4
School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
5
Atmosphere and Ocean Research Institute, the University of Tokyo, Kashiwa, Chiba 277-8564, Japan
6
Department of Biological Sciences, Graduate School of Science, the University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan
*
Authors to whom correspondence should be addressed.
Water 2020, 12(10), 2874; https://doi.org/10.3390/w12102874
Received: 28 August 2020 / Revised: 28 September 2020 / Accepted: 12 October 2020 / Published: 16 October 2020
In the past few years, environmental DNA (eDNA) techniques have been used to monitor marine communities. Research indicates that eDNA is an effective tool for monitoring fishery resources. This study analyzed the seasonal variations in fish resources in the Yangtze Estuary, China, using eDNA. A total of 103 water samples were collected from the Yangtze Estuary across the four seasons in 2019—20 samples in February, 28 in May, 28 in August and 27 in November. Our research successfully detected the fishery resources of the Yangtze Estuary. We found significant differences according to the season. The results showed that 59 species were identified in 2019 (20 in February, 16 in May, 5 in August and 45 in November) and fish species varied widely over the four seasons. Furthermore, our samples revealed significant differences in annual fish stocks in the Yangtze Estuary, compared with eDNA data from 2018 and with traditional surveys from past years. Overall, eDNA is a useful emerging tool to assist with monitoring and protecting fish resources for the Yangtze Estuary. View Full-Text
Keywords: Yangtze Estuary; environmental DNA; marine fish; seasonal variation; fish assessment Yangtze Estuary; environmental DNA; marine fish; seasonal variation; fish assessment
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MDPI and ACS Style

Jia, H.; Wang, Y.; Yoshizawa, S.; Iwasaki, W.; Li, Y.; Xian, W.; Zhang, H. Seasonal Variation and Assessment of Fish Resources in the Yangtze Estuary Based on Environmental DNA. Water 2020, 12, 2874. https://doi.org/10.3390/w12102874

AMA Style

Jia H, Wang Y, Yoshizawa S, Iwasaki W, Li Y, Xian W, Zhang H. Seasonal Variation and Assessment of Fish Resources in the Yangtze Estuary Based on Environmental DNA. Water. 2020; 12(10):2874. https://doi.org/10.3390/w12102874

Chicago/Turabian Style

Jia, Hui; Wang, Yibang; Yoshizawa, Susumu; Iwasaki, Wataru; Li, Yuquan; Xian, Weiwei; Zhang, Hui. 2020. "Seasonal Variation and Assessment of Fish Resources in the Yangtze Estuary Based on Environmental DNA" Water 12, no. 10: 2874. https://doi.org/10.3390/w12102874

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