CATDOLL : CATDOLL: Which fish are suitable for freshwater farming in the north?

1. What fish are suitable for freshwater farming in the north?

The following freshwater fish species are suitable for breeding in northern China

1. Carp Carp is one of the common freshwater fish in the north. They are often found in soft mud bottoms and waters with ditches, slopes, branches, rocks and other places where it is easy to hide or forage. Carp is an omnivorous fish and mainly feeds on vegetarian food. Fresh corn kernels and bran can be used as bait. Additives should mainly be fish meal, shrimp meal, silkworm meal, etc. with fishy smell.

2. White Stripe White Stripe is a primary freshwater fish. It has high requirements for water quality and reproduces quickly. This fish is similar in appearance to the horse mouth and the black bass. White Stripe likes fishy food and is a common fish at low altitudes. It likes to live in groups in the upper water layer of streams, lakes and reservoirs, and the depth of its habitat is generally 0 to 10 meters.

3. The scientific name of the Cockroach is Erythroculter ilishaeformis. It is large and slender. It is a large freshwater economic fish in the middle and upper layers. It moves quickly, is good at jumping, has a violent temperament, and is easily frightened. It grows rapidly and is a ferocious carnivorous fish that feeds mainly on live fish. The Cockroach can grow to the size of a meter and is very large.

4. Crucian carp is one of the common freshwater fish in the north. It grows in small rivers with stable water flow and abundant aquatic plants and plankton.

2. Fish that have high requirements for fresh water?

A: Such as trout, sturgeon, bass, knife fish, mandarin fish, stream grouper, etc.

Freshwater fish. Belongs to the genus Salmonidae. There are about six or seven species in the world, three of which, namely rainbow trout, cutthroat trout and Atlantic salmon, are native to Canada; the other two, namely brown trout and golden trout, have also been introduced to Canada. Unlike other salmonid fish, trout have black spots on their heads and bodies, and 7 to 12 fin spines on their tail fins. Except for the golden trout native to California, which only lives in small high-altitude lakes in western Alberta, all other trout species have both marine and freshwater forms.

3. What is the most common freshwater farmed fish in my country in 2017?

Answer: In 2017, the most popular freshwater farmed fish species in my country were the four major carps: common carp, grass carp, silver carp and bighead carp.

4. Which fish has the highest freshwater aquaculture production in my country in 2015?

It should be grass carp. Grass carp has always been the first of the four major carps. It is easy to breed and grows fast.

5. What is the role of purslane in fish farming?

In fish farming, purslane is not only a good feed for fish, but also a good Chinese medicine for preventing fish diseases, such as skin rot and eye rot of turtles and enteritis of fish. Usage: To prevent enteritis and skin rot of turtles, turtles and fish, take fresh orally, 50% purslane, 30% dandelion and 20% herba euphorbiae are blended into a slurry at a ratio of 10% of the daily dry feed, remove the residue and take the juice and add it to the feed to make granules, feed for 7 to 10 days every month.

If fine dry powder is used, mix it into the feed at a ratio of 1.5% of the daily dry feed and feed it for 8 consecutive days per month. However, the fine powder must be soaked in warm water for 2 hours before mixing.

6. Freshwater fish that eat shrimp?

Tilapia is omnivorous and often eats aquatic plants and shrimps; salmon eats plankton, insect larvae, shrimps and small fish; bream is an omnivorous fish and eats both meat and vegetables; black carp is a carnivorous fish and mainly eats small fish and shrimps; map fish is omnivorous and eats small fish, shrimps, etc.; arowana is omnivorous and eats shrimps, blood worms, feed, etc.; arowana eats animal feed, small fish, shrimps, etc.; crown mullet is omnivorous and eats dry feed, shrimps, etc.; red-tailed crown mullet is a carnivorous fish and likes to eat small fish, shrimps, mealworms, etc.; longspined fish is omnivorous and mainly eats small benthic animals, shrimps, small aquatic insects and some invertebrates.

7. Which fish can be farmed with cow blood? I am from Anhui freshwater fish.

It can mainly breed fish with high demand for carnivorous protein, such as black fish, soft-shelled turtle, turtle, and sea bass.

8. What is the significance of fish atlas?

As an atlas, it aims to show people the various types of fish, their appearance characteristics, ecological habits, living habits, distribution areas and other related information.

This will help people gain a deeper understanding of the ecology, species and living habits of fish, and will also help us better protect and manage aquatic biological resources. In addition, fish atlases can also be used in education, scientific research and tourism.

9. What is the significance of daily diet to breeding?

Each single feed raw material has its own characteristics. Some are mainly for supplying energy, while others are mainly for supplying protein and amino acids. The types and contents of vitamins or minerals in each feed raw material are also different. Therefore, single feed raw materials generally have nutritional imbalances and cannot meet the nutritional needs of livestock and poultry, seriously affecting their growth, development and production performance.

After research, feed professionals have found that scientific and reasonable feed matching can make full use of the nutrients in the feed, thereby greatly improving the utilization rate of the feed and achieving the goal of saving and rationally utilizing feed resources. For example, by using the differences in the amino acid composition of proteins in different feeds, the amino acids between the feeds can be complementary, or the missing amino acids can be supplemented to achieve a balance of essential amino acids in the matched feeds, which is beneficial to the absorption and utilization of protein by animals. Since the feeds are matched with each other, the palatability of the feed is also improved, which promotes the appetite of animals. Matching feeds can also effectively eliminate problems such as harmful substances and anti-nutritional factors in a certain feed, thereby improving the quality of the feed.

According to the nutritional needs of livestock and poultry at different growth stages, different physiological requirements and different production purposes, a variety of feed raw materials, vitamins and trace elements are evenly mixed in a certain proportion and according to the prescribed process flow to form a feed with comprehensive nutritional value that can meet the various actual needs of livestock and poultry. It is called compound feed, also known as complete feed.

The production of compound feed is subject to feed laws, regulations and relevant standards, which is conducive to ensuring its quality, human and animal health, environmental protection and maintaining ecological balance. Compound feed can be fed directly or with a little processing, which is convenient for users to use, transport and store, and reduces the labor intensity of breeding staff.

Daily ration: The total amount of various feeds consumed by an animal to meet its various nutrients requirements in a day is called daily ration.

Feed: In intensive breeding conditions, group feeding is usually adopted for livestock production. In order to facilitate the industrialization of feed production and the mechanization of feed management operations, the composition of each raw material in the feed is often converted into a percentage when the animals are fed in groups, and then formulated into a complete feed that meets the nutritional requirements of animals in a certain production level group. This complete feed formulated according to a percentage is called feed.

Feed formula: The percentage composition of each feed raw material in the feed is called feed formula.

Compound feed: According to the feed industry operating procedures, the various feed raw materials are evenly mixed according to a certain process flow, and the resulting mixture is called compound feed.

Compound feed is an inevitable choice for intensive breeding and industrial feed production.

10. What is the significance of ORP to marine aquaculture?

ORP, or oxidation-reduction potential, is of great significance to marine aquaculture in the following ways:

1. Indicates the redox status of the water body. The higher the ORP, the higher the oxygen content in the water body, and the faster the degradation rate of organic matter in the water body, while the lower the ORP, the lower the oxygen content in the water body, and the slower the degradation rate of organic matter. Therefore, ORP can reflect the redox status of the water body, thereby helping farmers to understand the water quality and make timely adjustments.

2. Help control aquaculture environmental conditions. ORP value can be used as an important indicator for regulating water environment. In the process of marine aquaculture, monitoring ORP value can help control the stability of water quality, maintain the relative stability of water body, and avoid water quality problems caused by excessive changes in parameters such as pH of water body.

3. Predict the condition of farmed animals. ORP values ​​can also predict the health of farmed animals, especially invertebrates such as fish and shellfish. Because these animals are sensitive to water oxygen, redox and other parameters, fluctuations in ORP values ​​can detect the stress suffered by animals, so that water conditions can be adjusted in time to ensure the health of farmed animals.