1, analysis method of dorsal fin black spots
Arhat is a hybrid, and the method of identifying the black spots on dorsal fin is not accurate. However, the general method of distinguishing between males and females can't be used in young arhats, so the original parent method is adopted to increase the probability of distinguishing between males and females in young arhats (the following is only personal observation).
No black spots on dorsal fin: 90% are male.
The dorsal fin has black spots: 60% is female.
2, the overall posture analysis method
Usually, he is a stout, angular man. The round one is female.
3. Analytical method of dorsal fin stem bone.
1~6 dorsal fin foot bone is thick and round, male. If you are young, you are usually a mother.
4. Analysis method of pelvic fin attributes.
Because females need to provide oxygen by shaking their ventral fins during reproduction; Prevent bacteria from invading and use it to sweep away sundries. So if you touch the pelvic fins with your hands, the softer ones are female and the harder ones are male.
5, fish breast line analysis method
This analytical method is rather vague. Generally, the male fish has a sharp chest line and the female fish has a round chest line.
6, cloaca resolution method
This solution is the most accurate. Under normal circumstances, the male genital hole is "V" shaped and the female genital hole is "U" shaped. In estrus, the cloaca of the female fish is prominent and can't be wrong.
Appreciate Lohan:
1. Body shape: including the first impression, the body shape of the fish, the swimming mode and posture of the fish in the display tank; At first glance, you need to feel that this fish is fit in all aspects, with a short back and a thick body, and there is no doubt that it swims smoothly. It swims gracefully in the water, is not shy or afraid of others' sight, and still shows a majestic momentum.
Second, the color: the brighter the color of the fish, the better, but it should also be coordinated. Just like a painter painting, the color of the subject must be bright, clear and dazzling, but the embellishment color should also be delicate to set off the effect. It is in harmony with the main color and bears the responsibility of whitewashing and dressing up the body.
3. Beads: One of the main reasons why the arhat is an arhat is that the dazzling beads must walk evenly and closely with the scales and fins every day like the stars all over the sky, and all the beads should be consistent, round and shiny, as if pearls were really embedded in the appearance of the coat.
4. Pattern: The mottled scales and the side of the forehead beads on Lohan's body are the most prominent places. The distribution, arrangement, quantity, brightness and gold and silver coils of ink spot scales are all one of the criteria for evaluating morning. That is to say, even if there is a double-row ink spot scale, if the ink spot scale is light and there is no gold and silver thread outside, it is just an ordinary individual, and the ink spot scale is not only beautiful, but also beautiful. However, varieties without mottled scales, such as gold, naturally have other audit priorities.
5. Head: Each arhat has forehead beads of different shapes, colors and sizes. It stands upright on the top of the head, which seems to bring out all the majesty and bravery of the arhat. At the same time, the plump and rounded shape also symbolizes the good luck of Fulu Xi Shou, but it is meaningless as one of the most attractive features of the flower arhat.
6. Eyes: must be located on both sides of the head. It is important that the pupil and sclera (the white part of the eye) should be clear and distinct. They are not only Zhu Chi with bright black and red eyes, but also have a god-like vision. They are nearsighted or farsighted, exuding powerful domineering belonging to Lohan and depicting their souls in their eyes.
Seven, each fin: chest, abdomen, back, buttocks, tail fins have different shapes and functions. The best conditions are that the fins are intact, the fins are clear, the fins are wide, the colors are rich and gorgeous, and they must be perfectly matched with the fish. The famous fins must be straight, flying like a sail blown by the wind.
Etiological diagnosis and treatment of arhat and other freshwater fish.
1) disease name: water flaccid disease
Etiology: (a) Poor water quality and environment.
(b) It is caused by surface damage.
(c) Subsequent parasitic infection with water flaccidity.
Symptoms: It seems that a substance similar to cotton is attached to the surface.
Treatment: (1) Heating is one of the good methods.
Supplement antibiotics and antibacterial agents.
(c) Treating with malachite green or methylene blue.
(2) Name of disease: dehydration disease
Etiology: (a) Poor water quality.
(b) Invasive infection by bacteria or protozoan mixture.
Symptoms: Abdominal swelling, exophthalmos, or scales like pinecones. Treatment: (a) Improve the water quality immediately.
Supplement antibiotics or antibacterial agents.
The treatment is not simple.
(3) Name of disease: rotten mouth disease
Etiology: (a) It is caused by parasitic aquatic bacteria.
(2) The water quality deteriorates and bacteria are easy to multiply.
Symptoms: the mouth and gill cover are like white cotton balls, which are gradually eroded and rotted: loss of appetite, slow movement, and then death. The infection of this disease is shocking and can lead to the death of two fish in the whole tank within a few days.
Treatment: tetracycline. The dosage is 13 mg plus one liter of water. After that, put the sick fish into the treatment box for about six to seven days, and draw half of the water every day to maintain the original dose.
(4) disease name: scalp point disease
Etiology: (a) Poor water quality.
Lack of vitamins or minerals.
(c) Invasive infection of hexaflagellates and Edwardsiella.
Symptoms: there will be holes of different sizes around the head of the guest.
Treatment: (1) Immediately raise the boiling water.
Supplement vitamins and minerals suitable for nutrition.
(c) Use of antibiotics and pesticides.
(5) Name of disease: shock disease.
Etiology: It is caused by human factors. Environmental mutation: such as taking fish out of acidic water or taking fish out of low-temperature water into high-temperature water, and vice versa.
Symptoms: Due to inadaptability to the new environment, the fish are in a state of shock, colliding with each other, and some even suffocate.
Treatment: Prevention is better than cure. When changing water or buying new fish, check the water temperature and quality first to avoid this disease.
(6) Disease name: white spot disease
Etiology: It is caused by white spot worm infection.
Symptoms: (a) The body surface, fish scales, eyes and gills are covered with small white spots of about 0.5- 1.0MM each, and then they break, fester and break.
(b) The fish itches and rubs against the stone.
(c) A large number of parasites in gills lead to increased mucus secretion, dyspnea and asphyxia.
Treatment method: (a) Raise the water temperature to 28 degrees -3 1 degree for one week or ten days.
(b) Long-term medicated bath with 2-5PPM methylene blue for 3-20 days.
(c) 0.05-0.2PPM malachite green, once every two or three days for five consecutive times.
(7) Disease name: Rotten tail disease/rotten fin disease.
Etiology: (a) Injury during fishing and transportation.
(b) Fish fight with each other and cause injuries.
(c) the water quality is not suitable.
(d) ectoparasite attacks.
Columnar and other bacterial infections.
Symptoms: turbid white fog appears at the end of the fin, followed by symptoms such as breakage and bleeding.
Treatment: (a) Isolate the diseased fish.
(b) Pay attention to and improve water quality.
(c) Feeding antibiotics or antibacterial agents due to bacterial infection.
(8) Name of disease: oral cotton disease
Etiology: (a) Mouth and lip injuries caused by fishing or transportation.
(b) Severe bacterial infection, followed by inflammation.
(3) Water flaccidity is parasitic.
Symptoms: the lips are swollen after flushing, and then cotton wool-like substances are attached.
Treatment: (a) Isolate the diseased fish.
(b) Give antibiotics only in cases of swelling and bleeding.
(c) Infected by mixed aquarium and treated with methylene blue or malachite green.
(9) Name of disease: gill disease
Name of disease: (1) Injury caused by unsuitable water quality environment.
(b) Parasitic infection caused by parasites.
Escherichia coli and other bacterial infections.
Symptoms: (a) I have no appetite at all and my body color is dim.
(b) The gill is swollen, so that the gill cover cannot close the wall.
(c) Shortness of breath, dyspnea and difficulty.
Treatment: (1) immediately improve the water quality environment.
(b) The salinity in the water should be increased by 0.3-0.5% (please don't overdo it).
(c) If it is caused by parasite infection, the parasite should be treated first; When nematodes such as rotifer, trypanosoma or calicivirus invade and infect, use 20PPM of flumarin. Take it for about 12-24 hours.
Treat other bacterial infections.
(10) Name of disease: superficial ulcer
Etiology: (a) Injury caused by fishing or transportation.
(b) Caused by a second bacterial infection.
(c) Combined bacteria cause chronic infection.
Symptoms: ulcer wound appeared on the body surface, with papular swelling and bleeding at the beginning, then he changed dramatically, ruptured, ulcerated and perforated, and gradually the deep recess expanded.
Treatment: (a) Feeding with antibiotics or antibacterial agents.
(b) It is best to destroy the fish infected with tuberculosis.
(1 1) Name of disease: ascites.
Etiology: (1) Injury caused by poor water quality.
Invasive bacterial infection.
(c) infected by a virus.
Physiological metabolism is impaired.
Symptoms: loss or disappearance of appetite, obvious swelling of abdomen. The initial symptoms are not obvious, the desire to eat gradually decreases, the action is inflexible, and he likes to hide in the corner. Then it is accompanied by scaling.
Treatment: it is not easy to treat, so you can try to increase the salt content in water and supplement antibiotics.
(12) Name of disease: Squamous mycosis
Etiology: (1) Poor water quality leads to injury.
Bacterial infection and injury.
(c) Viral invasive infection.
Physiological metabolism is impaired.
(e) Poisoning or allergy.
Symptoms: complete loss of appetite, slow and inflexible movements, scales standing like pinecones in vitro, followed by ascites or exophthalmos, accompanied by swelling and swelling.
Treatment: This disease is not suitable for treatment, or it is better to eliminate it, or you can often try to increase the salt content in the water and treat it with antibiotics.
(13) disease name: emaciation.
Etiology: (a) The water quality is not suitable or good.
(b) the feed is not suitable.
(3) Not suitable for couples, long-term shock and urgency.
Caused by chronic diseases.
Symptoms: loss of appetite, dim body color, slow and inflexible vitality, and gradual weakness.
Treatment: (1) Improve the water quality and environment on the bait, and cooperate with nutritious vitamins.
(b) Those seriously affected should be eliminated.
(14) disease name: convex eye disease
Etiology: (1) Trauma.
(b) impaired physiological metabolism.
Allergic reaction.
Symptoms: the eyeball is obviously bulging, occasionally accompanied by systemic edema or scales.
Treatment: (a) In case of injury or infection in vitro, antibiotics can be administered.
(b) Fish with systemic edema symptoms should be eliminated.
(15) Enteritis
Etiology: (1) The feed is not clean, resulting in bacterial invasion and infection.
(b) Improper bait, large and small meals, and uncertain appetite.
(c) intestinal parasite infection.
Symptoms: Mucinous feces will be discharged, and occasionally feces will attach to the anus, resulting in dragging. In severe cases, you will lose your appetite completely, and your anus will be red and swollen, which will lead to bleeding.
Treatment: (1) immediately improve the water quality environment, pay attention to feeding and provide vitamins.
(b) If the fish is seriously consumed, it is best to give it up.
Name of disease: swollen eye disease
Etiology: (a) Poor water quality and inconsistent pH value.
(b) The water quality has a strong alkaline PH value, which makes it easy for bacteria to invade.
Symptoms: Eyes are red and swollen like longan nucleus.
Treatment: Pick up the sick fish and drip it with organic silver solution three or four times a day.