scholarly journals Fish Diversity Monitored by Environmental DNA in the Yangtze River Mainstream

Fishes ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Hui Jia ◽  
Hui Zhang ◽  
Weiwei Xian
Keyword(s):  
Yangtze River ◽  
Fish Assemblages ◽  
New Technology ◽  
Aquatic Organisms ◽  
Environmental Dna ◽  
Ctenopharyngodon Idella ◽  
Future Research ◽  
Fish Diversity ◽  
The Yangtze River ◽  
Time Saving

Surveys and assessments based on environmental DNA are not only efficient and time-saving, but also cause less harm to monitoring targets. Environmental DNA has become a common tool for the assessment and monitoring of aquatic organisms. In this study, we investigated fish resources in the Yangtze River mainstream using environmental DNA, and the variations in fish during two seasons (spring and autumn) were compared. The results showed that 13 species were identified in spring, and nine species of fish were identified in autumn. The fish with higher eDNA detection were Sinibotia superciliaris, Tachysurus fulvidraco, Cyprinus carpio, Ctenopharyngodon Idella, Monopterus albus, Acanthogobius hasta, Saurogobio dabryi, Oncorhynchus mykiss, Mugil cephalus, Odontamblyopus rubicundus. Seasonal variation between spring and autumn was not significant, and the environmental factors had different effects on fish assemblages during the two seasons. Our study used the eDNA technique to monitor the composition of fish in the spring and autumn in the Yangtze River mainstream, providing a new technology for the long-term management and protection of fishery resources in the region. Of course, problems such as pollution and insufficient databases are the current shortcomings of environmental DNA, which will be the focus of our future research and study.

Composition and changes in abundance and biomass of fish assemblages along the Jingjiang section of the Yangtze River over the last decade

2014 ◽  
Vol 21 (6) ◽  
pp. 688-698
Author(s):  
Sun Shasha ◽  
Tang Wenqiao ◽  
Guo Hongyi ◽  
Li Huihua ◽  
Liu Dong ◽  
...  
Keyword(s):  
Yangtze River ◽  
Fish Assemblages ◽  
The Yangtze River

Longitudinal recovery gradients of drifting larval fish assemblages in the middle reach of the Yangtze River: impact of the Three Gorges Dam and conservation implementation

2019 ◽  
Vol 76 (12) ◽  
pp. 2256-2267 ◽  
Author(s):  
Yiqing Song ◽  
Fei Cheng ◽  
Peng Ren ◽  
Zhen Wang ◽  
Songguang Xie
Keyword(s):  
Water Temperature ◽  
Yangtze River ◽  
Fish Assemblages ◽  
Larval Fish ◽  
Three Gorges ◽  
The Yangtze River ◽  
River Section ◽  
Middle Reach ◽  
The Three Gorges ◽  
The Three Gorges Dam

Drifting larval fish assemblages were investigated at three sections in the middle reach of the Yangtze River downstream of the Three Gorges Dam to reveal recovery gradients and to identify the major environmental factors influencing their temporal and spatial patterns. Larval fish in the river section closest to the dam showed lower abundance, later occurrence, narrower temporal niche breadth, and more pairs of dominant species with high niche overlap than those further from the dam. Water temperature, transparency, and discharge significantly influenced the larval fish assemblages. They showed longitudinal gradients of increased water temperature, decreased transparency, and increased discharge in a downstream direction. Our results suggested that hypolimnetic and clean water discharge from the dam heavily impacted larval fish assemblage in the river section near the dam. With an increased distance to the dam and the input of some major tributaries, this impact was gradually buffered, thus forming the longitudinal recovery gradients. We suggest that priority for conservation should shift from river sections closer to the dam to those further from the dam.

scholarly journals Ecological correlation between aquatic vegetation and freshwater fish populations in Perak River, Malaysia

2018 ◽  
Vol 19 (1) ◽  
pp. 279-284
Author(s):  
SITI NORASIKIN ISMAIL ◽  
MUZZALIFAH ABD HAMID ◽  
MASHHOR MANSOR
Keyword(s):  
Freshwater Fish ◽  
Aquatic Plants ◽  
Aquatic Vegetation ◽  
Fish Assemblages ◽  
Aquatic Organisms ◽  
Fish Growth ◽  
Fish Diversity ◽  
Breeding Sites ◽  
Ecological Correlation ◽  
Growth And Reproduction

Ismail SN, Abd Hamid M, Mansor M. 2018. Ecology, diversity and seasonal distribution of wild mushrooms in a Nigerian tropical forest reserve. Biodiversitas 19: 279-284. Aquatic plants play a crucial role in an aquatic ecosystem partly because these plant communities provide suitable habitats and food items to other aquatic organisms especially fish. Many fish communities use vegetation as breeding sites, nurseries and refuges for their juveniles. Therefore, this study was conducted to provide baseline data on the correlation between the aquatic plants and freshwater fishes in Perak River. Based on the findings, the abundance of aquatic plant influences the growth and health of the fish. Habitats with moderate amounts of aquatic vegetation provide the optimal environment for many fish and hence, increase the fish diversity, feeding, growth, and reproduction. In contrast, both limited and excessive vegetation may decrease fish growth rates at 75% to 85% of plant community coverage. The recent trip along the Perak discloses the presence of these aquatic plants at certain habitats. There is a positive correlation between aquatic plants and freshwater fish. The association between aquatic plants and fish assemblages has been documented in scientific studies with the conclusion that moderate plant densities could enhance the fish diversity, feeding, growth, and reproduction.

Using environmental DNA to detect Hypophthalmichthys molitrix during the spawning period in the Yangtze River

2018 ◽  
Vol 12 (1) ◽  
pp. 37-39
Author(s):  
Rui Ruan ◽  
Dengqiang Wang ◽  
Huamei Yue ◽  
Chuangju Li ◽  
Daqing Chen ◽  
...  
Keyword(s):  
Yangtze River ◽  
Environmental Dna ◽  
The Yangtze River ◽  
Hypophthalmichthys Molitrix ◽  
Spawning Period

The interaction processes of the fish assemblages between the Yangtze River and Poyang Lake, China

2021 ◽  
Author(s):  
Chen Zhang ◽  
Mingzheng Li ◽  
Tao Chang ◽  
Xin Gao ◽  
Huanzhang Liu ◽  
...  
Keyword(s):  
Yangtze River ◽  
Fish Assemblages ◽  
Poyang Lake ◽  
The Yangtze River ◽  
Interaction Processes
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