The fish *Elopichthys bambusa* (Richardson), commonly known as the scorpionfish or horizontal fish, belongs to the family Acipenseridae and the subfamily Yalominosae. It is a large freshwater predatory fish, typically found in the middle and upper layers of rivers and lakes. Known for its fast swimming speed and agile movements, it primarily feeds on other fish. Due to its rapid growth, large size, and delicious meat, especially when dried, it has long been a popular species among local communities.
However, over the years, the natural population of this fish has drastically declined due to the construction of water conservancy projects and the degradation of aquatic environments. In Zhejiang Province, it has become extremely rare to find these fish in local rivers and lakes. To address this issue and promote sustainable aquaculture, the Zhejiang Provincial Department of Science and Technology launched a major project in 2002 titled "Fish Breeding and Healthy Breeding Technology and Demonstration of Freshwater Famous Fishes." This initiative aimed to develop new freshwater aquaculture species and improve fish resource management.
In collaboration with the Jinshan Fish Breeding Farm in Donglin Town, Huzhou City, the Zhejiang Institute of Freshwater Fisheries successfully introduced adult *Elopichthys bambusa* specimens weighing between 2.5 kg and 8 kg from the Yangtze River as broodstock. These fish were intensively farmed for over two years, during which their gonads matured. On May 15, 2005, an artificial spawning experiment was conducted in Huzhou using oxytocin injections and flowing water stimulation techniques. The results were highly successful, marking a major breakthrough in artificial breeding of this species.
By May 20, an expert team from the Zhejiang Provincial Department of Science and Technology conducted an on-site inspection of the trial. The results showed a 100% codling rate, 83.3% fertilization rate, and 80% hatching rate, resulting in the production of approximately 1.6 million fry. This achievement marked the first successful artificial breeding of *Elopichthys bambusa* in China, opening new possibilities for the conservation and commercial development of this valuable freshwater fish.
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