CATDOLL : CATDOLL: How big can a Chinese bream get? What are the characteristics of Chinese bream and tilapia?

1. How big is the largest crucian carp?

The maximum size of the amblyhead bream varies by region and species, but generally adults are between 20 and 40 cm long. The largest amblyhead bream ever recorded was a sun bream weighing about 1.4 kg and about 60 cm long, captured in Florida, USA.

2. What are the characteristics of bighead carp and tilapia?

Both the bighead carp and tilapia are common freshwater fish, and they have some characteristics as follows:

1. Roundhead bream (also known as roundhead crucian carp):

- Appearance: The body of the crucian carp is laterally flattened and slightly oval in shape. Its body color is mostly silvery white or gray, usually with a slightly darker back and black spots on the sides.

- Head: The head is relatively large, with a prominent forehead, hence the name. The mouth is small and pointed, with the upper jaw slightly longer than the lower jaw.

- Living habits: The bighead carp is a freshwater fish that likes to live in the middle and lower water layers, usually in rivers, lakes and other waters.

- Eating habits: Feeds on plant and animal plankton and benthic organisms. It likes to eat phytoplankton, zooplankton and small invertebrates.

- Reproduction method: The Chinese bream is an oviparous fish that reproduces by laying eggs. It usually reproduces between spring and summer.

2. Tilapia (also known as African tilapia):

- Appearance: Tilapia has an oval body, flattened laterally and slightly tall. It is usually long and brightly colored, with yellow, red, blue, etc. Characteristically, adult males have a prominent forehead ridge and large upper and lower jaws.

- Living habits: Tilapia is a tropical fish that likes to live in warm waters and has strong adaptability. They usually live in slow-flowing or still rivers, lakes and reservoirs.

- Eating habits: Tilapia is an omnivorous fish, mainly eating plant and animal food. They can eat aquatic plants, small algae, insects, plankton and other small fish.

- Reproduction method: Tilapia is an oviparous fish that reproduces by laying eggs. The female fish will lay the eggs in a specific location, and the male fish is responsible for protecting the eggs and young fish during the period of guarding and incubating the eggs.

These are some of the basic characteristics of the amblycephalus and tilapia, which differ in appearance, living habits, eating habits, and reproduction methods. When raising these fish, you need to provide a suitable breeding environment and bait to meet their needs.

3. How to select broodstock of bighead carp?

Megalobrama amblyce is native to some lakes with lush aquatic plants in the middle and lower reaches of the Yangtze River. In the 1950s, the Institute of Hydrobiology of the Chinese Academy of Sciences conducted research on the bream fish in Liangzi Lake during a lake survey and found that its morphological characteristics were quite different from those of the triangular bream. It was identified as a new species by Yi Boru and its scientific name is Megalobrama amblyce pha laYih.

Later, Cao Wenxuan conducted a comparative study on the ecological habits of the triangular bream and the round-head bream in Liangzi Lake.

Wen et al. domesticated wild bream in ponds and solved the problems of mixed culture, close breeding, reproduction, disease prevention and control in pond culture of bream. In the 1960s, it was promoted all over the country and became a new pond culture object in my country. With the development of lake and reservoir aquaculture technology, bream has become an important object of proliferation and cage fish farming. According to statistics, the total output of bream in China reached 379,000 tons in 1996.

The meat of the bighead carp is rich and delicious, with high nutritional value. The individual size is moderate. After being cooked and placed on a plate, the overall shape is beautiful, which is very suitable for the Chinese people's eating habits. The market demand is large, the price is more acceptable to consumers, and the market potential is great. Farmers who manage it well can achieve good economic benefits.

I hope that readers can refer to and apply this knowledge according to the specific local conditions. The stocking model introduced in the book was summarized by others based on the specific conditions at that time and in the local area, and can be used as a reference for the development of aquaculture and production of bighead bream. However, my country has a vast territory, many types of waters, different climate and water quality conditions, and different technical levels and market development levels. Readers can flexibly apply it according to the specific local conditions, and cannot copy it mechanically. Strive to be creative and develop

During the breeding season, the male crucian carp has a large number of starfish on its head, pectoral fins, caudal peduncle and back. Milky white semen will flow out if the abdomen is pressed lightly. The first ray of the pectoral fin is thick and slightly curved in an "S" shape. This feature persists throughout life. The pectoral fins of the female are smooth and have no starfish. The first ray is thin and straight. Except for the caudal peduncle, starfish are rarely seen in other parts, and the abdomen is obviously swollen.