Are Egyptian bearded catfish and catfish the same kind of fish? Urgent! ! ! ! ! ! ! ! !

Egyptian bearded catfish, also known as leather bearded catfish, belongs to Silurus, Silurus and Silurus. The Egyptian catfish protein has high content, rich nutrition, delicious taste and nourishing and medicinal value. Silurus aegypti is one of the fastest growing catfish in Silurus aegypti, and the fry of that year can reach the commercial specifications (450-600g/tail) after 3-4 months of feeding. 1998, the Egyptian catfish fry introduced from the south of our county, after three and a half months of production test, achieved the expected results. The production test results are reported as follows: 1. Materials and methods 1? Pond conditions: an ordinary fish pond with an area of 2.2 mu, an average water depth of 1.5m, and good water conservation and drainage facilities. The water source is underground well water, which goes through a certain process. 2? Fish pond disinfection: 200kg quicklime was used to disinfect the fish pond on June 38+0, and well water with a depth of 1m was injected on June 3 (shallow water is conducive to temperature rise). At the same time, 500 kilograms of chicken manure was applied. 3. Release of catfish fry: June 10, release catfish fry 1000 (5-6 cm) after water testing, and disinfect with Vivi crystal before entering the pond. 4? Feeding management: pig blood and minced fish are fed in the first half month after the fry enter the pond, and then mixed with wild fish, livestock and poultry leftovers and granular feed. When feeding, the catfish was conditioned by sound and domesticated. Feed the fish twice a day, and each feeding amount accounts for 5 ~ 10% of the fish's weight, which will increase or decrease according to the weather, water quality and feeding situation of the fish. Visit the pond every day and keep records. Second, the test results from June 10 to September 25th, after three and a half months of breeding, * * * caught 6,500 catfish, with a survival rate of 65%. See the following table for details: information of entering and leaving the pond, survival rate of entering and leaving the pond, mantissa time specification, mantissa time specification, June mu yield 10, 5-6 cm130,000 mantis, September 25th, 450-600 g6,5001536 kg65%. Economic benefit analysis: Catfish with Egyptian beard was caught in 2.2 mu pond. Feed pellet feed 5630kg, wild fish and livestock waste 6 100kg, total feed cost 23835 yuan, total production cost 39725 yuan, total profit 14355 yuan, and profit per mu 6525 yuan. Analysis and discussion After three and a half months of production experiments, it is proved that as long as the water quality is good, the bait is sufficient, the disease prevention work is done well, and high-density culture is adopted in the high-temperature season in our region, the high yield of the Egyptian catfish can be obtained. 1? Density: Because the auxiliary organs on the gills of the Egyptian catfish are developed and the skin can breathe, it has strong hypoxia tolerance. As long as the water quality is fresh and the feed is sufficient, it can be raised in high density. 5 ~ 8 cm fish can reach 10 ~ 20 per square meter. 2? Water quality control: Due to the high density of fish species, it is easy to pollute the water quality by feeding animal leftovers. It is necessary to change water and inject water in time, and often remove residual bait and excrement to prevent water pollution. The average water depth during the whole feeding period should be kept at about1.5m. 3? Feeding: Because the Egyptian catfish is an omnivorous fish with animal feed as its main food, it is necessary to pay attention to supplying a certain proportion of animal protein feed, supplemented by some plant feed to ensure its rapid growth. Therefore, in the process of feeding, we always insist on mixed feeding with wild fish, animal leftovers and granular feed. 4? Prevention and control of fish diseases: due to the high stocking density of fish species, prevention and control of fish diseases must be done well. When fish enter tang qian, use quicklime to disinfect fish ponds, and use Vivi crystal to disinfect fish bodies when entering ponds. During the feeding period, because the soil in our area is mostly acidic (pH 5.5 ~ 6.5), quicklime water is sprinkled every half month to adjust the water quality. When feeding animal scraps, feed with Baixuening. In mid-July, a few fish showed white skin disease, and the whole pool was sprayed with chlorhexidine for 3 days, with good results. No other fish diseases have occurred since then. 5? Escape prevention: Egyptian bearded catfish is the easiest to escape in high-density pond culture, especially in heavy rain or rainstorm. Egyptian bearded catfish is very active and will climb ashore around the pond, so it is necessary to do a good job of escape prevention. During the feeding period, due to the low ridge, some fish escaped after a rainstorm, which is the main reason for the survival rate of 65%. Dunyan (Huachuan County Fisheries Bureau)

700 ml service

2003. 10 quilt

Ya Xin Xi Pei Bo bullying fever in the southern circle' Q Yang'

55000 1 Xie Qiaoxiong, Guizhou Aquatic Technology Extension Station, Wu Xiuli

South mouth painting is also called mouth painting, commonly known as Wu.

River map, which is mainly distributed in the Yangtze River system in China, is expensive.

Wujiang river basin is widely distributed in Guizhou province. Big mouth knot is

A carnivorous large economic fish, generally 10.

The body can reach 3-5 kg, and the largest individual can reach 50 kg.

Kim. The meat is tender and delicious, without tendons.

Thorn, favored by consumers.

(1) Biological characteristics

1, edible gill is a fierce carnivore.

Fish preys on aquatic animals such as fish and shrimp. pass by

Large caliber, can prey on animals equivalent to 1/

When food is scarce, three kinds of fish often kill each other.

Eat it. Under the condition of artificial feeding, from the fingerling stage,

Tame and feed compound feed.

2. Life habit is wide-temperature fish, eaten raw.

The storage water temperature is 0-38', and the suitable growth water temperature is 18-

32`C, the hypoxia tolerance is weaker than that of CYPRINIDAE, and it is positive.

Dissolved oxygen in growing water needs 3 mg/L.

In fact, the floating head appears below 2 mg/L. Natural water

Benthic organisms in the area lie down during the day and eat at night.

3, reproductive habits, big gills in the river

The breeding season is from April to June, and the parents are artificially cultivated.

Fish can mature about 1 month in advance. 1 year can spawn.

2-3 times, spawning needs water temperature 18-289C, eggs.

Oil yellow, heavy and sticky.

(2) fry cultivation

Three days after hatching, that is,

You can eat with your mouth open. At this time, fry cultivation began.

In the stage, cage culture and cement pond culture are generally used.

Two educational methods.

1 box 1 cultivation selection network 40-60

Objective Mesh cloth is 2-3 square meters, and one is placed.

People are swimming in a lake or pond with running water.

0.8- 1.0 m. The stocking density of fry is 2500-3000.

3000 fish /m3. After the fry are put into the box, catch small fish.

Type a scratching larvae were fed, and after 2-3 days, they were fed again.

Free foraging

(3) Prevention and treatment of fish diseases

Tea can also prevent and treat fish bleeding.

Bacterial gill rot, erythroderma, enteritis, etc. Among fish species,

After the pond 1 month, or fish diseases in summer and autumn.

Outbreak season (April-June 65438+1 October)1mu water depth1m.

Boil 5 kilograms of new tea in the fish pond and cut the tea tube.

Into the size of a bowl, step by step into the pond around, piece by piece.

In the mud, because the tea drums are divided in cold water.

The solving speed is slow. Unable to publish in a short time.

The concentration of toxins that cause fish to die, and the transportation of water.

Animals and fish can contact each other in swimming and breathing activities.

The toxin in the tea drum can not only kill the fish's body surface.

And it can also kill parasites.

Bugs. It is best to stick to it 2-3 times a month, for people who are not sick.

This fish also has a good preventive effect on developed diseases.

The therapeutic effect on sick fish is also obvious; Can also be matched.

Mix quicklime (splashed with 20kg water) or bleach.

White powder (1 mu water depth 1 m fish pond 1 kg

It is better to use chemicals such as chemical spraying. 0

T40，*(ra a9 * } 4 *+Ya * $ &； )& amp 1 5)}2co..n ( A Vg 6J}0 0* KA*""i

Le Yi county, seven source Ming village Li Chang worship.

Operation "15 yuan." Famous doctor's secret recipe "Qiao Yuan,

Wanfang data 15 yuan, saved Liu Fafa. 542406 guangxiping

Split the east side of Peng belt.

One eye can hold a hundred treasures-

Hello, red bug. The bait should be kept fresh and sufficient and thrown out.

Bait time is divided into 2-3 times and arranged once.

At 8-9 pm, night feeding accounts for the whole day.

50%-60% of the quantity. Put a higher one in the box.

Bait, the biological density of bait shall be kept at 10-25.

A/ml, so as not to fry each other because of lack of food.

Leftover food Clean the cage every day to avoid dirt blockage.

Mesh, leading to the exchange of tin and water in the cage.

Insufficient dissolved oxygen leads to a large number of fry deaths.

2, P -k * cultivation generally choose 3-8 grades.

Rectangular or circular cement pool, square meters, used for water intake and drainage.

Conveniently, the water depth of the pool can be adjusted as needed.

Degree. If there is not enough fresh water, you can put it in the pool.

An air pump can inflate and replenish oxygen at any time. let go

The feeding density is 3000-3500/m2. bait

Feed type, bait dosage and cage culture method

Same. Siphon the dirt in the pool every day. exist

At the water temperature of 18 -23℃, the fry pass through 7- 10.

Daily cultivation, generally up to 3 cm.

Regulations, at this time can be transferred to the stage of fish reproduction.

(3) Fish culture

1, the selected species can still be cultured.

Cage pond culture method. Cage lifting and cage throwing _8- 1

10 mesh into 4-25m3.

Body mesh box with a cover at the top. You can choose a pond.

10-100 square meter rectangular or circular cement pool

Or 60-250 square meters of flat bottom material, pollution-free.

Mud is cultivated in a hard soil pool.

2. The cultivation method strictly adopts graded cultivation.

Educational methods. Because of the fierce nature of big mouth. fish

Segments grow rapidly, with great individual differences and mutual disability.

Eating is very serious. Usually once every five days.

Choose the appropriate fish screen grade according to different specifications.

Reclassified pools or boxes should usually have the same specifications.

Fish species are all cultured in the same water body and have their own specifications.

The difference shall not exceed 1/3, and the stocking density shall be gradually reduced.

Degree, stocking density can be customized according to different specifications

150-800 fish /m3, stocked in a soil pond.

The density can be reduced moderately, not exceeding 350.

Tail /m3.

3. Feeding method: Turn fry into mermaids.

Cul and ifi were used for feeding and stretching at the initial stage of planting.

Soak in potassium permanganate solution before feeding.

20% of fish, 1, three times a day, and the feeding amount at night.

50% of the whole day. When the fish grows to 5 cm,

Above, conditional places can be changed to feed others.

Bait species, such as carp, octopus, sewing fish or

The feeding amount of white striped fish is 5- 5 times of the density of big mouth gill.

/kloc-0 0 times. If the source of live bait is limited, we should start training.

Generally, it is easier to carry out cage culture by feeding compound bait.

Light food. At first, the feeding frequency of big gills was not

High, you can add a small amount of maggots (about 10%) to mix.

Eat, about 5 days, basically ready to eat.

Mixed bait. Fish cultured in cement ponds or soil ponds

You can also refer to cultivation, but it takes a long time to domesticate food.

Some. After 30-35 days of cultivation, the fish species can reach

Spoon w steamed rice and begin to enter the stage of adult fish reproduction.

(4) Adult fish culture

Adult fish can live in ponds, cages and

Three feeding methods in paddy field.

1, pond area 1-

3 acres, convenient water intake and drainage, flat bottom, silt 5- 5.

10 cm, clean the pond with quicklime for disinfection. Main feeding

The stocking density of big gill fish in oral painting pond is per fish.

Sincerely seeking the latest breeding method and mode of Laishe snake.

Rapid propagation technology and seed supply information of Platanus acerifolia.

Double its benefits, all kinds of lesher seedlings, buy information mice.

Liang Bing, Hejiazhuang, Yunhe Village, Neisi Township, Xiangfen County, Shanxi Province 415.08 million square meters

The yield per mu is 800- 1200, including 75-100g.

The varieties below Gege are 100- 150. Match and raise

Keep 30-50 big mouths in the spider pond per mu.

Here, the stocking ratio of other fish remains unchanged. Basically no

Need bait, the source of bait is mainly wild weeds in the pond.

Fish and sick fish. Bait for ponds where spiders are mainly raised.

The structure is mainly animal bait. You can also use it.

Combine bait. The types of bait are small fish, shrimp and animals.

Dirty, maggots, snail meat, etc. Canned live bait fish

According to the dosage, every 3-4 days, usually every time.

The feeding amount is kept at about 40% of the weight of the big twist.

Its animal feed is 10%- 15% per day.

Feed according to the amount. The bait must be fresh, moderate and well divided.

Feed more to avoid wasting and polluting bait.

Dyeing water quality. Put 3%~5% compound bait every day.

Feed at the feed rate.

2. The cage of 2.KI box is 5m x5.

M× 2.5m or 6m× 6m× 2.5m.

Ethylene cage, 2 meters per person. Cover the top of the box. net cage

Put it in a micro-flow lake, and several cages are in the shape of words.

Shape arrangement. Use steel in fast-flowing rivers.

Body cage structure. South big mouth with specifications below 20 grams.

Feeding 120- 150 per cubic meter; 100

Grams or more per cubic meter of southern giant clams

The stocking quantity shall not exceed 50 pieces. Fish species specifications should be guaranteed.

Keep consistent, classify boxes, and clean boxes every 15 days.

Body. In order to avoid cannibalism. Bait type and pond

Feeding methods are consistent. Feed bait 2-3 times a day, bait

Fresh enough. Flexible adjustment according to weather and feeding activities

Master the amount of bait.

3. Paddy fields are raised, and the paddy field area is 2-.

5 acres, the excavation of one side of the field accounts for 8% of the field area.

7 W umm service

200 3., 。 Sleepy

1.2m fish pass by, and there are several gaps in the secluded place where they pass.

The ditch is connected with the field, and the fish ditch is 40-50 cm wide and 40-50 cm deep.

50-60 cm, in the form of "ten", "it" or "combination"

Shape. Convenient access to water. Clam species per mu

Put 30-50 tails at a time, one set per mu.

20 species of grass carp raised with100g and 15-

Twenty tails. The bait structure is similar to the first two ways of feeding bait.

Similarly, animal bait is generally ground into minced meat and mixed with beans.

Cake or other plant bait is mixed into balls and thrown into fish.

The compound bait can also be directly fed from the fish ditch.

Feed should adhere to the principle of "four fixed". meanwhile

At night, light trapping and killing are used to supplement the source of bait.

Daily feeding: 8%—

10% or 3%-5% compound bait. one

Twice a day, 70% of the whole day is fed at night.

About.

(4) Disease prevention and control

Big mouth painting has strong disease resistance and common diseases.

Get sick less. Generally, fish diseases are mostly in the fry stage.

The mortality rate is high. Common diseases include hoary head and white mouth disease,

Hemorrhagic disease and melon disease are easy to get in cement pools. success

Enteritis and printing disease are easy to occur in fish stage.

Due to the large mouth painting system of scaleless fish, many drugs

Things are sensitive and can easily lead to fish death. ordinary

Do not use irritating drugs, usually make

The dosage should be lower than the general dosage, or used for many times.

A small amount of medication is more appropriate. Generally use 0.3-0.4.

Mg/L crystal trichlorfon or 0.4-0.5 mg.

G/L mixture of copper sulfate and ferrous sulfate (5:2)

Prevent and treat parasitic diseases by spraying them. Using oxytetracycline,

Sulfonamides, ketones and other antibacterial drugs.

Oral bait can prevent and treat bacterial diseases.