CATDOLL : CATDOLL: What are the common parasites of fish?

1. What are the common parasites of fish?

Fish parasites can be divided into two categories according to the part of the body they inhabit:

1. Internal parasites.

This type of parasite lives in the internal organs, blood, intestines and other tissues of aquatic animals, such as Eimeria, various tapeworms, schistosomes, etc.

2. External parasites: This type of parasite lives on the body surface, gills, fins, etc. of aquatic animals, such as ringworms, anchorhead mullets, and fish mullets.

2. What fish do Americans eat?

The main fish Americans eat is salmon. Smoked salmon is very traditional. There is also a lot of tuna, which is called deep-sea chicken. There are also other fish such as cod, bass, trout, blue fish, tile fish, snapper, flounder, Grouper, croaker, Perch, Monkfish, Pollock, Butterfish.

3. What are the foreign fish databases?

Taiwan fish database, world fish database fishbase. If you want to search for catfish, catfish planetplanetcatfish is also a good choice.

4. How long does it take to completely remove drug residues from fish?

Generally, drugs can be considered metabolized at 500 degrees per day (average daily temperature x number of days). However, drugs like malachite green and chloramphenicol can be carried for life.

5. Can yellow powder eliminate endoparasites in fish?

No, yellow powder only targets bacterial infections and is ineffective against parasites.

Yellow powder can be dissolved in water and is an external fish medicine, which is different from internal fish medicine. Internal fish medicine is directly mixed into fish food and eaten by fish, mainly to treat gastrointestinal problems and internal parasites. Yellow powder is directly sprinkled into the water, and then the fish is bathed in medicine, so that the yellow powder contacts the surface wounds of the ornamental fish, killing the bacteria on the wounds or inhibiting their growth.

Yellow powder is suitable for use as a medicinal bath. Let the fish soak for thirty minutes every day until the wound heals.

6. How much is the U.S. foreign debt?

The US foreign debt had dropped from 14 trillion to 12.9 trillion by 2007, but the 2008 financial crisis has put Americans in debt again, and now it has increased to 15 trillion, including 1.2 trillion from China. This is what Americans often call pre-consumption, using other people's money to live a life of luxury!

7. What are the characteristics of U.S. foreign trade?

The main exports of the United States are: chemical products, machinery, automobiles, aircraft, electronic information equipment, weapons, food, medicine, beverages, etc. The main imports are: food, clothing, electronic equipment, machinery, steel, textiles, petroleum, natural rubber, and metals such as tin and chromium.

2.

The main trading partners are China, Japan, etc. In 2017, the top five US goods trading partners were China, Canada, Mexico, Japan and Germany. The top five US goods export markets were Canada...

3.

The transaction volume has increased for several years. In 2017, the total value of US merchandise trade was approximately US$3914.3 billion, an increase of 6.8% over 2016...

8. What are the drugs for killing external parasites in chickens?

Parasitic diseases are one of the important diseases threatening the poultry industry. Among them, external parasites (such as ticks, leeches, lice, fleas, flies, mosquitoes, etc.) are often overlooked. They use chickens as hosts, suck the blood of chickens, chew the feathers and dandruff of chickens, some parasitize on chickens for life, and some parasitize on chickens for a short time. While damaging the chickens, these parasites are also direct or indirect vectors of various infectious diseases. Therefore, killing external parasites of chickens is of great preventive and therapeutic significance for chicken diseases.

In production, appropriate insecticides can be selected, and treatment can be carried out in a timely manner by means of spraying, medicated bath, sand bath, water bath, powdering and smoke.

(1) Cypermethrin (pyrethrin, cypermethrin) is a contact insecticide that kills a variety of external parasites such as mites, lice, fleas, ticks, mosquitoes, etc. This product has strong insecticidal power, a wide insecticidal spectrum, is cheap, easy to use, and has low toxicity. It can be treated by bathing, spraying, direct application, or fumigation. If a 20% cypermethrin oil emulsion is used, it can be diluted to 1,000 to 5,000 times, and the temperature of the dilution water should be around 12°C.

(2) Dimethrin is effective against ticks, mites and lice in chickens, and can also kill cockroaches and ants. The commonly used dosage is 50~80ml, that is, add 200~350mL of 2.5% deltamethrin to 100l of water, spray directly or take a bath. (3) Sodium alkylbenzene sulfonate is one of the main ingredients of laundry detergent. Its aqueous solution can remove the wax on the surface of parasites and block the pores, which can cause the parasites to suffocate and die quickly. (4) Other common drugs include malathion, nicotine sulfate, ivermectin, sulfur ointment, etc., which can be used by spraying, dipping, sand bathing, rubbing, etc. The dosage is referred to the instructions.

9. How can I go to study in the United States by relying on my American grandfather?

Can't take refuge.

There is no help at all, but there is a tendency to immigrate, and it is even more difficult to get a visa.

If you have applied to a good school, you can directly apply for an F-1 visa. Generally, you will not be rejected unless you do not speak English at all.

If your relatives ask you about it, don't deny it, it will cause more trouble. Just tell them the truth and explain that you want to return to your country after graduation.

After the junior high school entrance exam, you will actually go to the United States to study in the 10th grade. The American high school lasts for 4 years, from 9th to 12th grade. However, it is better to study in the 9th grade because it is easier to integrate into the school.

After the high school entrance examination, few schools will accept students again. Applications are usually in December or January, and notifications are in April. You can apply for a family visit and go to a local public school with your relatives, but the choice is relatively narrow. However, if you fail to find a school and change to a student visa before your family visit visa expires, it will be illegal detention.

10. Who are some famous American people who were born outside the United States?

Einstein was born on March 14, 1879 in Germany.

March 14, 1879 - April 18, 1955) was a theoretical physicist born in Germany.

Einstein lived in Switzerland from 1895 to 1914, during which time he renounced his German citizenship in 1896.

Adolf Hitler came to power in 1933 when Einstein visited the United States. Due to his Jewish background, Einstein did not return to Germany but settled in the United States, becoming a U.S. citizen in 1940.