Distribution Behavioral Characteristics of the Reproductive Populations of Chinese Sturgeon and Habitat Assessment in the Yichang Spawning Ground Reach after the Interruption of Natural Reproduction
ID:85 View Protection:ATTENDEE Updated Time:2025-09-25 19:23:00 Hits:285 Oral& Poster Presentation

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Abstract
The Chinese sturgeon (Acipenser sinensis Gray,1835), a large anadromous migratory fish, has experienced a drastic decline in its wild population in recent years, presenting a grave  threat  to  its  survival.  Notably,  the  construction  of  large  scale water  conservancy projects such as the Gezhouba Dam and the Three Gorges Dam has significantly modified the natural hydrological rhythms  of the  downstream  river.  Key  environmental  variables, including river flow dynamics, water level fluctuations, and water temperature variations, have been altered, thereby disrupting both the physical and biological conditions essential for the natural reproduction of the Chinese sturgeon. In addition, human induced factors like environmental pollution have severely impacted its reproductive activities. Alarmingly, since 2013, 2015, and continuously from 2017 to the present, no natural spawning events of the Chinese sturgeon have been detected in the spawning grounds downstream of the Gezhouba Dam, raising serious concerns about the species' population status.Current research on the Chinese sturgeon predominantly focuses on population resource surveys, mostly relying on hydroacoustic  detection  methods.   There  is  a  conspicuous  lack  of  novel  technological approaches  for  its  monitoring.  Moreover,  integrated  analyses  of  the  physical  habitat suitability and biological integrity in the  Chinese  sturgeon  spawning  ground  reaches  are scarce.
To  elucidate  the  population  size  dynamics  and  spatial  distribution  patterns  of  the Chinese  sturgeon's  reproductive  groups  in  the  spawning  ground  reaches  following  the cessation  of  natural   spawning,   this   study   adopted   a   combined   approach   of  fishery hydroacoustic surveys and environmental DNA (eDNA) monitoring techniques. Continuous multi year synchronous monitoring was conducted in the Yangtze River sections within the Hubei Yichang Chinese Sturgeon Provincial Nature Reserve (hereinafter referred to as the "Reserve").
 Additionally,  a  habitat  suitability  model  for  the  Chinese  sturgeon  spawning grounds was developed. This model was based on a two-dimensional hydrodynamic model, constrained by fuzzy-logic rules and a temperature suitability index.


 
Keywords
Chinese sturgeon;,Hydroacoustics;,Environmental DNA;,Habitat suitability;
Speaker
崔 昭鹏
博士后 中国海洋大学

Submission Author
崔 昭鹏 中国海洋大学
Chang Jianbo Wuhan University
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Important Date
  • Conference Date

    Oct 19

    2025

    to

    Oct 25

    2025

  • Oct 19 2025

    Draft paper submission deadline

  • Oct 25 2025

    Registration deadline

Sponsored By
Wuhan University (WHU)
China Three Gorges University (CTGU)
China Three Gorges Corporation Limited (CTGC)
Aquatic Branch of the China Wildlife Conservation Association (ABCWCA)
The World Sturgeon Conservation Society (WSCS)
Organized By
Wuhan University (WHU)
China Three Gorges University (CTGU)
National Engineering Research Center for Eco-Environment in the Yangtze River Economic Belt (NECEYB)
China Fisheries Association (CFA)
The World Sturgeon Conservation Society (WSCS)
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