CATDOLL : CATDOLL: What are filter-feeding fish? What are filter-feeding fish?

1. What are filter-feeding fish? What are filter-feeding fish?

Filter-feeding fish: A general term for a class of cold-blooded vertebrates that live in water all their lives, breathe with gills, use fins to assist body balance and movement, and feed on plankton. The most common types of filter-feeding fish are silver carp and bighead carp, two of the four major carps. Silver carp is a filter-feeding fish that mainly feeds on phytoplankton, while bighead carp is a filter-feeding fish that mainly feeds on zooplankton. Both types of fish are particularly suitable for breeding in northern waters, where they grow fast and are used in large quantities.

2. What are filter-feeding fish?

Filter-feeding fish are a type of fish that use their gill rakers to filter tiny plankton, bacteria, organic debris, etc. in the water. Representative species include silver carp and bighead carp, which are traditional farmed fish in my country. The most common filter-feeding fish are silver carp (Hypophthalmichthys molitrix) and bighead carp, two of the four major carps.

3. What does filter-feeding fish mean?

Filter-feeding fish are a type of fish that use their gill rakers to filter tiny plankton, bacteria, organic debris, etc. in the water. Representative species include silver carp and bighead carp, which are traditional farmed fish in my country. The most common types of filter-feeding fish are silver carp and bighead carp, two of the four major carps.

Filter-feeding fish, also known as fat-water fish, feed on plankton and organic debris in the water by filtering them. They have specialized filter-feeding organs, mainly composed of gill rakers, gill raker tubes (branchial organs), palatine folds, and gill arc bones.

4. Can filter-feeding fish eat Microcystis and Anabaena?

Microcystis and Anabaena are some common cyanobacteria. They will reproduce in large numbers in some natural waters and may produce some toxic metabolites, which may cause some harm to aquatic organisms and human health. Therefore, in general, it is recommended not to let filter-feeding fish (such as carp, black carp, etc.) eat aquatic products that may be contaminated by Microcystis or Anabaena.

For these cyanobacteria, their main toxic components are microcystins and anabaena toxins. Different cyanobacteria will produce different types and amounts of toxins, which can have different degrees of toxic effects on various organisms. Some filter-feeding fish may be able to eat some contaminated algae or other toxic organisms in moderation, but if they eat too much algae or other toxic organisms, it may be toxic to the fish and eventually be excreted or die.

Therefore, in general, we recommend that filter-feeding fish not eat aquatic products contaminated by Microcystis or Anabaena to avoid potential food safety issues. If you are unsure whether a certain fish is safe to eat, it is recommended to consult relevant professionals or local fishery production management departments.

5. What are the three main categories of fish?

Chondrichthyes Chondrichthyes are the lowest class of existing fishes, with more than 200 species in the world and more than 140 species in China, most of which live in the sea. Their main characteristics are: ① They have no hard bones throughout their lives, and their internal skeleton is made of cartilage. ② Most of their body surface is covered with scales. ③ The gill septum is well developed, and there is no gill cover. ④ The tail fin is crooked. This system is divided into two subclasses, namely the Elasmobranchia and Holocephalia. Bony Fish Bony fish are the most numerous class of existing fishes in the world, with more than 20,000 species, most of which live in marine waters and some live in fresh water. Their main characteristics are: ① The skeleton is hardened to hard bones to varying degrees. ② The body surface is covered with hard scales, round scales or comb scales, and a few species are degenerate and scaleless. The mucous glands of the skin are well developed. ③ The gill septum is partially or completely degenerated, and the gills do not open directly to the outside of the body. They are protected by bony gill covers. The water flowing out of the gill slits is discharged through the rear edge of the gill cover, and most of them have swim bladders. ④ The tail of a fish is usually normal, but some are primitive or crooked. ⑤ Most are fertilized externally and oviparous, and a few undergo metamorphosis during development. The earliest fish was a round-mouthed, jawless fish that appeared on Earth during the Cambrian period 450 million years ago. Fish are easily distinguished from their appearance, and they form the largest group of vertebrates: among a total of 50,000 species of vertebrates, there are more than 22,000 species of fish. Lobe-finned fish (still controversial) The relationship between different groups of lobe-finned fish is still controversial, and the classification levels of different groups (such as class, superorder, order, etc.) also vary depending on the treatment methods of different scholars. It is generally believed that lobe-finned fish and lungfish in lobe-finned fish are two independent subclasses in the class of bony fish. Different scholars have linked the origin of tetrapods to lobe-finned fish or lungfish. Therefore, the study of fossils and living representatives of lobe-finned fish is one of the most eye-catching research areas in paleontology and evolutionary biology.

6. What baits are used for freshwater algae filter-feeding fish?

One kilogram of seaweed is a bait produced by Marukyu Bait Company. It is a strong bait that attracts fish, has algae smell, fine particles, and strong atomization. It also has a certain effect on grass carp when combined with wild food. In my country's freshwater fishing, this product has a good effect on carp. In winter, it will also have a miraculous effect on crucian carp when combined with a certain amount of animal protein bait. Algae itself is a universal and excellent basic additive for fish food, which is theoretically suitable for any fishing environment.

Bait ingredients

It is actually processed seaweed powder, so its atomization performance is excellent and it has a strong algae smell.

Bait characteristics

It can be used as an attractant bait or as a state bait for adjusting bait. It feels good when used as a state bait, the bait will not die if it is hit for a long time, it has good solubility and atomization, and has a good effect in attracting fish.

Bait preparation strategy

One kilogram of Marukyu's seaweed is a special bait for carp:

1. Use alone

2. Mix 50% of Secret Carp, 30% of Three-Color Carp, and 20% of one kilogram of seaweed.

3. Mix 70% carp flag, 20% big carp, and 10% of one kilogram of seaweed.

4. Mix 60% wild food, 30% granular carp, and 10% of one kilogram of seaweed.

5. Mix 50% granular carp, 30% secret carp, 10% Wushuang, and 10% of one kilogram of seaweed.

7. What are the three categories of adult flies’ feeding habits?

Adult flies can be divided into three categories based on their feeding habits: non-feeding flies have degenerate mouthparts, with only traces remaining, such as mad flies, skin flies, and flies of the family Gastromys; blood-sucking flies feed on the blood of animals and humans, and both males and females suck blood, such as flies of the genera of Stomatis and Glossina; non-blood-sucking flies have nectar-eating (such as filth flies that feed on nectar), dung-eating (such as carrion flies and toilet flies that like to feed on human feces), and omnivorous (such as various flies in residential areas), the latter of which can feed on decaying plants and animals, human and animal food, excrement, secretions, pus and blood, etc. Flies feed frequently, and spit, suck, and excrete feces at the same time, which is of great significance in the mechanical transmission of diseases by flies.

8. What kind of vitamins does fish supplement?

Among the W-3 fatty acids contained in fish, EPA and DHA are the most abundant. In addition, fish oil is extremely rich in fat-soluble vitamin A and vitamin D, especially in the liver of fish. Salmon, shark and herring contain high amounts of vitamin D.

Fish also contains appropriate amounts of four water-soluble B vitamins: vitamin B6, B12, and niacin.

9. To which category does the Sanli registered trademark belong?

The registered trademark of Sanlv belongs to the registered trademark of automobile accessories, which belongs to the 12th category of transportation, the 7th category: automobile filters, and the 11th category: automobile lights. The automobile air filter belongs to the 1202 group of the 12th category of the trademark classification. The automobile air conditioning filter belongs to the 1106th sub-category of the 11th category of the trademark classification. The oil filter belongs to the 0748 group of the 7th category of the trademark classification.

10. Which category does the oil filter cart belong to in the invoicing system?

For mixed invoicing of diesel and engine oil, the tax classification should be selected as Goods - Petroleum, Chemical, Pharmaceutical Products - Petroleum Processing, Coking and Nuclear Fuel - Petroleum Products - Diesel, referred to as diesel, with the code: 10701010301;

For invoicing by type, motor oil should choose petroleum products - lubricants - lubricants tax classification, abbreviated as: lubricants, the code is: 10701010701.