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Striped spotted shark artificial breeding technology
Chiloscyllium plagiosomum, commonly known as the dog shark or striped bamboo shark, is a species of cartilaginous fish belonging to the family Hemiscylliidae. Native to the South China Sea and the southern part of the East China Sea, this small warm-water shark is a carnivorous species with high nutritional and medicinal value. Its muscle is rich in protein, making it a valuable food source and an attractive ornamental fish. Due to its market potential, it has become a promising candidate for marine aquaculture. In recent years, the Zhanjiang Aquatic Technology Extension Center of Guangdong Province collaborated with Zhanjiang Donghai Nanda Aquaculture Co., Ltd. to conduct artificial breeding experiments using naturally captured striped bamboo sharks as broodstock. The project successfully hatched larvae and cultured them in shrimp ponds, marking a significant step forward in sustainable aquaculture practices.
The breeding process began by selecting 80 healthy adult striped bamboo sharks, consisting of 50 females and 30 males, with an average length of 74 cm and weight of 2.2 kg. These broodstock were reared in specially designed cement pools equipped with filtration systems, oxygenation, and water circulation. The water was maintained at a salinity above 1.016 and a pH around 8.4, with regular disinfection using bleaching powder and EDTA-2Na salt to remove heavy metals. During the acclimation phase, the sharks were fed a variety of live foods such as oysters, sandworms, crabs, and squid, while also receiving vitamin supplements and beneficial microorganisms to enhance their health and reproductive capacity.
Artificial breeding was initiated under controlled environmental conditions, including temperature (27–31°C), light, and water flow. Mating occurred naturally within 30 days of intensive feeding, typically at night. Spawning was facilitated by placing water pipes and nets in the spawning pools to provide shelter for the eggs. After laying, the eggs were collected and transferred to specialized hatching tanks, where they were monitored closely. Hatching took over 30 days, with larvae emerging with large yolk sacs. These early-stage fry were then moved to nursery ponds, where they were fed a varied diet of live organisms to support their growth.
The culture of juvenile sharks in shrimp ponds proved highly successful, with a survival rate of over 86%. After six months, the first batch of farmed sharks reached an average length of 45 cm and a weight of 530 g. This achievement demonstrates the feasibility of artificial breeding and suggests that the species could play a key role in coastal aquaculture. By reducing pressure on wild populations, this method not only supports sustainable seafood production but also helps protect marine biodiversity. With further research and large-scale implementation, the striped bamboo shark could become a vital component of modern aquaculture systems.