Jiaxi Wang (Hubei Fisheries Research Institute, Wuhan 430071)
(I) Technical Overview and Characteristics
The American largemouth bass [Micropterus salmoides (Lacepede)] is a large freshwater fish native to North America. It has gained popularity worldwide due to its large size, high yield, strong disease resistance, early maturation, low oxygen demand, omnivorous diet, and ease of farming. This species can survive in water temperatures ranging from 0°C to 42°C. Many countries, including Russia and Ukraine, have already introduced the American largemouth bass as an alternative to traditional carp species for aquaculture. Chinese fisheries experts had been advocating its introduction since the 1980s. In May 1993, the Hubei Fisheries Science Institute successfully introduced the American largemouth bass into China for the first time. Through extensive research on its biology, economic traits, artificial breeding, pond culture, and feed formulation, the project developed a set of suitable breeding techniques tailored for China's conditions. This initiative not only filled gaps in local aquaculture research but also brought significant economic and social benefits.
Key performance indicators of this technology include:
(1) A comprehensive study of the biological characteristics of the American largemouth bass, comparing them with those of local species like the Chinese catfish.
(2) Successful propagation tests, leading to the first generation of captive-bred individuals.
(3) Development of fry cultivation methods suitable for China’s environment.
(4) Designing and testing compound feeds based on regional feed types, keeping costs under 40%.
(5) Promotion of 1.2 million seedlings across provinces such as Guangdong, Sichuan, Hubei, Shandong, Jiangsu, Shanghai, and Beijing, generating over 613,000 yuan in direct economic benefits and more than 14 million yuan in social value.
(B) Key Technical Points
The habits of the American largemouth bass are similar to those of catfish, but they also have unique features. The main technical points include:
(1) Artificial spawning using oxytocin injections, followed by natural spawning. Incubation can be done in cement pools, ponds, or raceways.
(2) Seedling rearing can be carried out in concrete pools, cages, or nursery systems. Cement ponds are commonly used, with a stocking density of about 30,000 per cubic meter. After 10–15 days, the fish reach 2–3 cm in length, with survival rates of 81% to 92%.
(3) Adult culture is typically done in ponds, either alone or in combination with other species. A typical stocking rate is 900–12,000 fish per hectare, with each fish weighing 50–150 grams. Feeding with 35% protein compound feed, along with 300 kg of quicklime per hectare applied 15 days before the outbreak season, helps maintain water quality. After one year of careful management, the total yield can reach around 9,150 kg per hectare.
(4) Disease incidence is relatively low during the breeding process. However, anchor worms may affect fingerlings. To prevent this, a trichlorfon solution at 0.03 µL/L is added to the entire pond, and one-fifth of the water is replaced regularly to control bacterial diseases.
(III) Market Potential and Benefits
The successful introduction and domestication of the American largemouth bass hold great significance for adjusting China's freshwater fish species structure, increasing the market share of premium fish species, and optimizing the utilization of aquatic resources. This initiative also accelerates the industrialization of China’s aquaculture sector. Widespread breeding of the largemouth bass is expected to bring substantial economic, social, and ecological benefits, particularly in both developed and underdeveloped regions, including mountainous areas.
Monkfish can lose weight and prevent diseases. Monkfish is low-fat, low-calorie, and rich in vitamins A, D, and E. It has a good effect on maintaining eyesight, treating coughs, and preventing liver diseases. At the same time, monkfish can nourish and anti-aging. Monkfish is rich in colloid, which has a good effect on the beauty and health of modern women.
Monkfish,Monkfish In Tomato,Wild Monkfish Fillet,Monkfish Tail
Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com