CATDOLL : CATDOLL: Which marine aquaculture project has the best benefits?

1. Which marine aquaculture project has the best benefits?

Nowadays, consumers have an increasing demand for marine products, and accordingly, the marine aquaculture industry is developing rapidly. Therefore, many people are eager to invest in marine aquaculture. So, what is the most profitable in marine aquaculture?

There are many projects with good benefits for marine aquaculture as follows:

Shellfish: mussels, scallops, oysters, mud clams, hairy clams, razor clams, clams, variegated clams and abalone, etc.

Algae: kelp, laver, wakame, agar, kelp and eucheuma, etc.

Crabs: There are blue crabs, blue crabs, etc.

Fish: barracuda, mullet, Nile tilapia, red sea bream, black sea bream, grouper, sea bass, yellow croaker, American red fish, tooth flounder, puffer fish, etc.

Shrimp: Chinese shrimp, giant tiger shrimp, long-haired shrimp, black shrimp, Japanese shrimp and whiteleg shrimp, etc.

2. What is the tallest freshwater fish?

The world's tallest freshwater fish is a relative of the lake sturgeon, the European sturgeon.

The European sturgeon is a member of the Acipenser family, just like the lake sturgeon, but the lake sturgeon is a genus of Acipenser, while the European sturgeon is a genus of Acipenser. The European sturgeon is mainly distributed in the Black Sea, the Sea of ​​Azov and the Caspian Sea (which is a lake) at the junction of Asia and Europe, as well as in the rivers that flow into them.

The adult European sturgeon can reach a length of 6 meters and weigh 1 ton. According to the records of the Pan-European Sturgeon Action Plan compiled by the World Sturgeon Conservation Society and the World Wildlife Fund, the largest European sturgeon can even grow to 8 meters long and weigh an astonishing 2.2 tons!

European sturgeons also have a long lifespan, and like lake sturgeons, can live to be over 100 years old. Unlike humans, who stop growing after adulthood, European sturgeons can continue to grow, which may be why they can grow so large.

3. Which freshwater fish is the easiest to breed?

Silver carp. Silver carp is one of the four major fish species in aquaculture, also known as silver carp, water carp, and jumping carp. It is a typical filter-feeding fish that mainly eats plankton.

Silver carp spends most of its time swimming in the upper and middle layers of the water for food. When the water temperature drops, it will dive to deep water to hibernate. It is an upper and middle layer fish. In the breeding process, silver carp has a very poor tolerance to low oxygen. If there is a lack of oxygen in the water, silver carp will immediately float to the surface. Therefore, in the breeding process, it is necessary to ensure that there is sufficient oxygen in the water.

4. What are the freshwater fish species that hide during the day and come out at night?

Yellow catfish often inhabits waters with complex underwater environments and many rocks. They like to feed in turbid, dark, and low-light conditions. Yellow catfish have a strong sense of territory and are solitary, which is why we often catch only a few of them. If we want to catch more, we need to break their sense of territory and lure them out with suitable nesting materials to gather them together.

2. Hiding during the day and coming out at night: The yellow catfish is different from other fishes. It is "photoshy" and prefers a low-light environment. It often hides during the day and comes out at night. It mainly feeds on small fish and shrimps at the bottom of the water. After dark, it will go to the surface of shallow water and eat zooplankton on the water surface.

5. Which country has the most freshwater fish?

As a country, China is one of the countries with the most freshwater fish species, with more than 800 species. So far, there are more than 30,000 known fish species, and more than 20,000 of them live in freshwater. However, these freshwater fish are distributed all over the world. If divided evenly, there are not many freshwater fish species in each region or country. For example, with more than 9.6 million square kilometers of land in my country, there are only 800 species of freshwater fish.

6. Fish breeding techniques?

1.

Stocking time selection: Fish should be released on sunny days when the temperature is not too low. Generally, the temperature should be between 2℃ and 5℃. At this stage, the fish scales are tight and the activity is small. It is not easy to injure the fish during fishing, transportation and stocking operations, which can reduce the morbidity and mortality of fish. It is easy to frostbite the fish on rainy days with low temperature or snowy, frozen and windy weather; when the temperature is too high, the fish scales are loose and the activity is large, which is easy to injure the fish during operation.

2.

Stocking of fish: Before stocking the fish, check whether the drugs have lost their effectiveness after pond cleaning. In early spring, the water temperature is low and the toxicity disappears slowly. Water should be taken in advance and test fish should be released. According to the stocking plan, individual size, density, and matching species and specifications, the fish that can be released at one time should not be released in batches, so that the fish can adapt to the environment, start eating early, and promote growth. At the same time, [Gold Iodine] should be used for drug disinfection when stocking fish.

3.

Feeding at the right time When the water temperature rises to 810℃, fish begin to eat, and the amount of food intake gradually increases with the increase of water temperature, so they should be fed in time. Feed once a day or every other day, and choose to feed at noon on a sunny day; as the water temperature continues to rise, the number of feedings can be increased to twice, that is, feeding once in the morning and once in the afternoon. Feeding should adhere to the principle of four determinations (timing, quality, positioning, and quantity), and the specific daily feeding amount should be flexibly controlled according to the weather, water temperature, and the feeding situation of fish. For grass carp weighing more than 1 jin, it is recommended to feed Da Beinong high-grade expanded feed 8103 in the early stage of feeding; for small grass carp mode, it is recommended to feed Da Beinong microecological juvenile fish special feed [Intestinal Liver Health], and the feeding rate is controlled at about 0.5%1%. This product is rich in nutrients and probiotics, which can quickly repair the fish intestines, restore the physique, and improve immunity.

Four,

Add organic fertilizer to improve the fertility of the water body. Sanyingshuiwang organic biological fertilizer has a long-lasting fertilizer effect. Yizaoyuan promotes algae growth and quickly fertilizes the water. After the fish pond is cleaned, frozen, and disinfected in winter, the fertility of the water body is low. As the saying goes, raising fish starts with raising water, so fertilizing the pond water is particularly important. In spring, it is best to apply organic fertilizer. It is recommended to use biological fertilizers rich in various trace elements [Sanyingshuiwang] or Yizaoyuan, which are rich in trace elements. The specific amount of fertilizer and frequency should be determined according to the quality of pond water and fertilizer.

The general principle is: early spring, large amount and few times, late spring, small amount and many times. Make the pool water green (including blue-green, yellow-green and bean green) or brown (including yellow-brown, reddish brown and tea-brown), the water transparency is moderate, maintained at about 30 cm, the water temperature is low in early spring, it should be controlled at 20-30 cm, the temperature is high in late spring, it should be controlled at 25-35 cm, the water quality should be kept rich, active, tender and refreshing.

7. How to breed Sugitail, a freshwater fish?

Freshwater fish cannot have their water changed frequently.

8. What is the white crucian carp of freshwater fish?

Mandarin fish is a precious freshwater fish. It is also known as Guiyu, Guihuayu and Guiyu. In fish taxonomy, it belongs to the order Perciformes. It has a long flat body, a pointed head, a big mouth, big eyes, and a green body with a metallic luster. Mandarin fish is as famous as the Yellow River carp, the Songhua River four-gilled perch, and the Xingkai Lake big whitefish, and is known as one of the "four famous freshwater fishes" in my country. It has a lot of meat with few bones, white and tender meat, shaped like garlic cloves, firm meat and delicious taste. It is a top-quality edible fish among freshwater fish.

9. Which fish is most profitable in industrial farming?

This question is too broad. You can raise fish or anything else if you do it well.

10. What are the quality requirements for farmed fish?

1. Fish species

1. Different species of fish have different protein and fat content in their muscles, different meat structures, and large differences in price.

2. Different species of fish have different contents of amino acids that make up the protein in the fish meat, such as lysine, arginine, glutamic acid, aspartic acid, alanine, etc., and the taste is also different.

3. The types and proportions of fatty acids in fish fat, especially the proportion of docosahexaenoic acid (DHA), also vary, resulting in different tastes of fish.

4. DHA is a natural melatonin and an essential nutrient for the human body. Fish with high DHA content include tuna, bonito, salmon, mackerel, etc.

5. The content of the above-mentioned amino acids and DHA in the muscles of marine fish is higher than that of freshwater fish, so marine fish tastes better than freshwater fish.

6. In aquaculture, the selection of breeding species must meet the following conditions: choose suitable breeding species based on the local breeding environment and climatic conditions; examine whether they have market development prospects; the selected breeding species must not have any difficulties in terms of seedlings, feed, etc.; be able to master the feeding and management techniques of the breeding species, and invite breeding experts for regular guidance, etc.

2. Aquaculture water environment

1. Aquaculture requires sufficient water resources, fresh water quality and no pollution.

2. First, establish a farm in a place with sufficient water resources, up-to-standard water quality, convenient irrigation and drainage, and convenient transportation. Secondly, cultivate good water quality. During the breeding process, pay close attention to changes in water temperature, transparency, dissolved oxygen, pH value, etc. to ensure that the water quality always remains "rich, active, tender, and refreshing."

3. Feeding

1. Feed is the material basis for farmed fish to survive. The balance between protein, fat, carbohydrates and vitamins in the feed is crucial. Fish eating high-quality and fresh feed can improve their physiological state and immunity, and increase their survival rate. Fish farmed in this way have good color, normal body shape, strong vitality, firm fish meat and good taste.

2. Feed feeding: select palatable, high-quality, fresh feed according to the physiological characteristics of fish, and strictly follow the "four determinations" principle for scientific feeding; adjust the feeding amount in time according to weather conditions and fish feeding conditions; make full use of the breeding space of the water body, adopt a mixed breeding method of multiple varieties, rationally utilize the natural bait and artificial feed in the water body, improve the breeding water environment, and improve the breeding efficiency.

4. Use of fishery drugs

1. In the process of aquaculture, when cleaning ponds and disinfecting, seedlings and feeding tools, and adjusting water quality, the selection of fishery drugs should be scientific and reasonable, and special attention should be paid to the usage and dosage to prevent the quality of farmed fish from being affected by improper use of drugs.

2. The use of fishery drugs should be based on different aquaculture species and different pathogenic factors. Appropriate national standard fishery drugs should be selected, and treatment should be carried out according to the prescribed dosage, usage method, and course of treatment, and the regulations on drug withdrawal periods should be strictly implemented.

3. In breeding, we should start from the nutritional needs of animal growth, feed hygiene, breeding management and other aspects to reduce the occurrence of diseases and ensure human food safety.