CATDOLL : CATDOLL: What kind of fish are farmed in Rongcheng? What are the morphological characteristics of farmed fish?

1. What are the farmed fishes in Rongcheng?

Rongcheng's sea is located at the intersection of cold and warm currents, and is recognized by the world as the most suitable latitude for the growth of marine life. Rongcheng's marine aquaculture started in the 1950s, grew in the 1970s, developed in the 1990s, and took off in the early 21st century. It has experienced five industrial waves of "fish, shrimp, shellfish, algae, and ginseng".

2. What are the morphological characteristics of farmed fish?

Ancient warship

The ancient warship is a very common edible fish in Southeast Asia, its country of origin, but in my country, many fish lovers also raise them as ornamental fish. Since the ancient warship is very common and widely raised in Southeast Asia, fish lovers do not have to worry about their source.

1. Appearance characteristics

The ancient warship is a super strong fish species. And it grows very quickly. It can grow very large in a very short time. So you should be careful not to keep them in a small aquarium. The aquarium should be no less than 120 cm. Otherwise, it will have an adverse effect on their growth.

2. Reproduction characteristics

The reproduction method of the ancient warship is the same as that of the Siamese fighting fish. It also lays eggs in a bubble nest. The male fish is responsible for the protection of the eggs and young fish. The young fish that have just started to swim can immediately eat larger baits such as water lice and silk earthworms due to their large size. It should not be difficult to raise them. The young fish are quite aggressive. At about 2 years old, the ancient warship reaches maturity and can reproduce the next generation. This fish has a certain aggressiveness and is too large. Therefore, it can only be raised with large fish. In the process of raising ancient warships, an albino variety appeared, which is the golden warship. It is also called the fortune-bringing fish. In addition, the scientific community has disclosed two subspecies of the ancient warship: the red-winged warship and the seven-barred warship.

3. What impact does whitebait farming have on other fish?

If silverfish are mixed with other fish, it is very likely that the fish will float to the surface. Floating will also occur when the water temperature is above 20 degrees, which indicates that the dissolved oxygen content in the water is very low.

If you do not take immediate measures after discovering this situation, it will easily cause losses to silverfish and even large-scale deaths.

4. What are the dissolved oxygen requirements of farmed fish?

Dissolved oxygen is a necessary condition for fish survival, and the amount of dissolved oxygen in water has a great impact on fish feed utilization and growth.

When the dissolved oxygen content is above 5 mg/L, fish feed normally; when the dissolved oxygen content drops to 4 mg/L, fish feed decreases by 13%; when the dissolved oxygen content drops to 2 mg/L, its feed decreases by 54%; when it drops to below 1 mg/L, the fish stop eating.

Not only that, sufficient dissolved oxygen in the pond can also improve the living environment of fish and reduce the concentration of toxic substances such as ammonia nitrogen, nitrite nitrogen and hydrogen sulfide.

However, the higher the dissolved oxygen content in the water is not necessarily better. When the supersaturation of dissolved oxygen in the pond water reaches over 150% and the dissolved oxygen content reaches over 14.4 mg/L, it is easy to cause bubble disease in fish.

Appropriate dissolved oxygen levels are crucial for the survival, growth and feed utilization of farmed fish.

The dissolved oxygen in pond water is mainly produced by photosynthesis of phytoplankton in the water. 60% to 70% of the dissolved oxygen in pond water is produced by photosynthesis of phytoplankton.

To this end, in order to keep a certain amount of oxygen in the pool water from escaping into the atmosphere, the aerator can be turned on from 13:00 to 14:00 on sunny days when photosynthesis is strong, so as to send the dissolved oxygen in the upper layer to the bottom layer to supplement the lack of oxygen in the bottom layer and improve the water quality conditions in the bottom layer.

5. What are the selection criteria for recreational fish farming?

When choosing aquaculture species based on water temperature and climate conditions, you should also consider the local climate and water temperature. In some areas with cold climate and low water temperature, you can raise some cold-water fish, such as rainbow trout and sturgeon. In some places with warmer climate, or with hot springs and factory preheated water, you can raise some fish that require higher water temperature, such as tilapia.

4. When choosing aquaculture species based on pond and equipment conditions, you should fully consider factors such as the depth of the pond, the size of the pond, and the oxygenation machinery and power facilities equipped. Generally speaking, the deeper the pond, the larger the area, and the more complete the oxygenation equipment, the greater the carrying capacity of farmed fish, and farmers can appropriately consider increasing the stocking amount.

5. According to the breeding technology, farmers with high breeding level can choose some precious species that have high requirements for breeding conditions and management techniques and are difficult to raise; novices or those who lack breeding knowledge and experience can choose some species with strong vitality, low requirements for breeding conditions and simple and easy breeding methods.

6. According to the breeding method, there are many ways to breed freshwater fish, which can be single breeding, mixed breeding and rotation breeding with other species. When breeding together, the water layer and feeding habits of the main species should be considered. It is best not to mix species living in the same water layer together to avoid competition for food.

6. What are the common fish farmed in my country?

I only know about the breeding of some common freshwater fish.

The most common species are the four major carps of "grass carp, silver carp and bighead carp". In addition, there are carp, catfish, bream, famous and special fish including yellow catfish, bigmouth catfish, sweet-scented osmanthus fish, whitebait and so on.

7. What fish are suitable for low-temperature farming in the north?

The climate in the north is generally cold, so it is best to choose freshwater cold-water fish for breeding. One type is freshwater ornamental fish, and the other is freshwater edible fish.

Ornamental fish: goldfish, koi, round-tailed betta, minnow.

Edible fish: The four major fish species are black carp, grass carp, silver carp, bighead carp, crucian carp, carp and black carp.

8. What are the methods for growing the succulent plant Angel’s Tears?

1. Soil: The potting soil of Angel's Tears requires looseness, air permeability, good drainage, and coarse particles. At present, the commonly used soil in China is red jade soil mixed with humus soil or leaf humus soil, peat soil, and a small amount of calcareous materials such as bone meal are added.

2. Temperature: Angel's Tears likes a warm environment, and has the characteristics of high temperature dormancy in summer and slow growth in winter. In winter, if the lowest temperature at night is not lower than 10℃, and there is a temperature difference of about 10℃ between day and night, you can water it normally to keep the plant growing.

3. Light: The growing season of Angel's Tears is in spring and autumn, and it requires sufficient sunlight. Insufficient sunlight will cause the plant to grow too long and the plant shape will be loose. It needs sufficient sunlight to have bright leaves, a more compact and beautiful plant shape, and short leaves. Too little sunlight will cause the leaves to be light in color and loosely arranged.

4. Watering: When watering Angel's Tears, you should follow the principle of "don't water unless the soil is dry, and water thoroughly when you do", to avoid water accumulation in the pot soil to prevent root rot. After many years of clustering, Angel's Tears plants are very spectacular, and the culture medium must be dry before watering. Angel's Tears flowers bloom in yellow clusters, and the flowers are still quite beautiful.

5. Fertilization: Since Angel's Tears grows slowly, no fertilizer is needed. You can place granular slow-release fertilizer on the soil surface for the plant to absorb slowly.

9. How to grow the succulent plant Tower of Akane?

1. Soil: The plant prefers fertile, loose and well-ventilated soil. You can choose to mix garden soil, coarse sand and leaf mold for consumption.

2. Watering: Water the plant once a week in spring and autumn, once every two weeks in summer, and adjust appropriately in other seasons.

3. Fertilization: During the growth period of the tower of red, add decomposed liquid fertilizer once every half a month;

4. Light: During the growth period, the plant needs sufficient light every day.

About the Tower of Qian

The tower of qian is a perennial succulent herb of the Crassulaceae family and the genus cycad. It is a kind of succulent plant. The short plant grows in a clump, only 5 to 8 cm high. It grows upright, and the perennial plant is prostrate. The "qian" in the Chinese name refers to the deep red color of its leaves; the neatly stacked purple-red leaves are reminiscent of the red pagoda with oriental characteristics, hence the name.

The Growth Environment of the Tower of Akane

The short plant of the tower of reddish purple grows in clusters, with dark green leaves. In the cool season of winter and early spring or under the condition of sufficient sunlight, the leaves are reddish brown or brown, with white cuticle on the leaf edge. The leaves of the whole plant are arranged closely and neatly, gradually becoming smaller from the base upwards, forming a pagoda shape. It prefers a sunny and warm, dry environment. It is not cold-resistant, and avoids waterlogging, high temperature and stuffiness, and excessive shade. It tolerates drought and semi-shade.

The main value of the Tower of Akane

The plant shape of the tower of red is unique, and the leaves are arranged neatly, resembling layers of exquisite pagodas. It is bright and eye-catching in full sunlight, and has a unique and elegant charm in diffuse light. It is suitable for planting in small craft pots, decorating windowsills and terraces with bright sunlight, adding a touch of fun to the room.

10. How to grow Angel’s Tears succulent?

Succulent plants like granular soil. If you don’t change the pot after a year of care, some of the granular soil will gradually become powder, which will affect the root system.

2. Growth is slow in spring and autumn

Generally speaking, spring and autumn are the time when succulents grow the fastest. If the succulents do not grow normally during these two time periods, it means that there is a problem with the root system or the soil, and the soil needs to be changed.

3. Leaves become soft

If you find that the whole plant starts to become soft, the leaves are also limp, and you water it regularly and expose it to the sun, but it still doesn't get better, then there is something wrong with the soil. You need to change the soil in time.

4. Too many dead leaves

Some succulents grow stronger, with more leaves, and many dead leaves at the bottom. In this case, the dead leaves are difficult to clean, so you have to change the potting soil and clean them up. Otherwise, there may be hidden insect eggs inside, which will be even worse.