Fishery Resources, Environment, and Conservation in the Mississippi and Yangtze (Changjiang) River Basins

2016 ◽  
Keyword(s):  
Fish Species ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Management Strategies ◽  
Commercial Fishing ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Upper Yangtze River ◽  
Sampling Locations

<em>Abstract</em>.—In this paper, we report fish resources in the upper reach of the Yangtze River from 2011 to 2012. The five sampling locations were Yibin, Hejiang, Mudong, Wanzhou, and Zigui. Yibin and Hejiang are the most upstream locations; Mudong is at the upper end of the Three Gorges Reservoir while Wanzhou and Zigui are in the inundated areas of the Three Gorges Reservoir. During our investigations, we collected 56, 94, 93, 67, and 64 fish species, respectively, from these five locations. Among them, 13, 21, 17, 4, and 4 are endemic to the upper Yangtze River. Catch per unit effort calculated with pooled data were 1,221.6–6,433.9 g/(d• boat). Because Yibin and Hejiang are still in the riverine state, endemic species remain. These areas are also in the national protected areas range. We suggest that commercial fishing should be banned in these areas to protect endemic fish species. However, for Wanzhou and Zigui, because they are in the inundated reservoir area, dominance has shifted from riverine to lacustrine species. Fisheries strategies should also be changed to target on different species, employ different fishing gears, and apply different management strategies.

Rate and Distribution of Sedimentation in the Three Gorges Reservoir, Upper Yangtze River

2018 ◽  
Vol 144 (8) ◽  
pp. 05018006 ◽  
Author(s):  
Wenjie Li ◽  
Shengfa Yang ◽  
Yi Xiao ◽  
Xuhui Fu ◽  
Jiang Hu ◽  
...  
Keyword(s):  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Upper Yangtze River

scholarly journals Spatiotemporal Distribution and Species Composition of Fish Assemblages in the Transitional Zone of the Three Gorges Reservoir, China

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3514
Author(s):  
Pengcheng Lin ◽  
Lin Chen ◽  
Xingchen Gao ◽  
Chunling Wang ◽  
Xin Gao ◽  
...  
Keyword(s):  
Fish Species ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Spatiotemporal Distribution ◽  
Three Gorges ◽  
Flood Season ◽  
The Three Gorges ◽  
Upper Yangtze River ◽  
River Reservoir ◽  
The Upper Yangtze River

The river–reservoir transitional zones play an important role in maintaining riverine fish biodiversity and abundance in highly regulated rivers. The Upper Yangtze River, which contains 286 fish species, is experiencing intense hydropower development. However, few studies have been conducted on the spatial distribution of fish in the river–reservoir transitional zones in the Upper Yangtze River, and it is therefore difficult to predict how this development will impact the region. In this study, a 200-kHz split-beam acoustic system in combination with biological samplings was used to investigate the composition and spatiotemporal distribution of the fish in the transition zone of the Three Gorges Reservoir (TGR) in 2017. The biological samplings comprised 7434 individuals from 61 species, 38 genera, 15 families, and 5 orders. The dominant fish species were Rhinogobio cylindricus, Coreius guichenoti, Hemiculter bleekeri, and Pelteobagrus vachelli. Acoustic detection identified the mean target strength (TS) to be −55.6 in May, −57.8 in August, and −55.8 dB in December. Accordingly, the average fish density was 4.96, 6.96, and 4.42 ind/1000 m3. Significant differences were found in the TS and fish density between flood season (August) and non-flood season (May and December). Spatially, fish preferred the meandering sections at 10–20 m deep. A size-dependent vertical distribution pattern was observed, with larger fish in the deeper layers and smaller fish in shallower waters. Lastly, our results suggest that meandering deep channels should be assigned high priority with respect to fish conservation in the Upper Yangtze River.

Length-weight relationships of 55 fish species from the Three Gorges Reservoir in the Yangtze River, China

2016 ◽  
Vol 32 (6) ◽  
pp. 1268-1272 ◽  
Author(s):  
S. B. Chen ◽  
C. S. Liao ◽  
Z. J. Li ◽  
T. L. Zhang ◽  
S. W. Ye ◽  
...  
Keyword(s):  
Fish Species ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Yangtze River ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

Regulation of Laijiapu Waterway in Jingjiang Reach

2014 ◽  
Vol 501-504 ◽  
pp. 2001-2006
Author(s):  
Ya Liu ◽  
Li Zheng ◽  
Cheng Tao Huang ◽  
Zhao Biao Huang ◽  
Lin Liu
Keyword(s):  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Yangtze River ◽  
Point Bar ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Before And After ◽  
The Stability ◽  
Channel Bar

After impoundment of the Three Gorges Reservoir, Jingjiang reach, in the middle of the Yangtze River, has gradually shown a series of atypical fluvial features, adversely affecting the maintenance of waterways. Citing the Laijiapu Waterway, a meandering segment in the lower Jingjiang for example, this paper compared the fluvial features of the channel before and after the impoundment, summed up its navigation-obstructing features, and proposed guarding the point bar on the convex bank and channel bar in the widening section as a key to maintaining the stability of the navigation channels.

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