CATDOLL : CATDOLL: All over the world means

1. Five Lakes and Four Seas refers to

Five Lakes: The ancients called several large lakes distributed in China the Five Lakes, which now generally refer to Poyang Lake, Dongting Lake, Taihu Lake, Chaohu Lake, and Hongze Lake; Four Seas: The ancients believed that the four seas surrounded China. It generally refers to all parts of the country. Sometimes it also refers to all parts of the world.

In modern times, Dongting Lake, Poyang Lake, Taihu Lake, Hongze Lake and Chaohu Lake are generally referred to as the "Five Lakes". In ancient times, the terms were different. For example, the Five Lakes in "Guoyu" and "Shiji" specifically refer to Taihu Lake, or Taihu Lake and its nearby lakes.

Six Lakes: Several large lakes in my country, with different opinions, generally refer to Dongting Lake, Poyang Lake, Taihu Lake, Hongze Lake, Chaohu Lake, and Qiandao Lake. In the "Geographical Interpretation of Ten Mountains and Rivers", the original names of the five lakes refer to Pengli, Dongting Lake, Chaohu Lake, Taihu Lake, and Jianhu Lake.

The "Five Lakes" consist of Xique Lake, Shatan Lake, Mo Lake, Xiaohu Lake and Xiaonan Lake. The land is fertile and it is a beautiful and rich land of fish and rice. The Five Lakes Fishery was founded in 1968. It covers an area of ​​more than 40,000 mu and has more than 4,000 fishermen.

Xiantao Wuhu Fishery is located in the southeastern border of Xiantao, adjacent to Hannan District of Wuhan, Datong Lake of Honghu City, and Jiayuzhou Bay. It is a large state-owned professional fishery in Xiantao City and a healthy breeding demonstration farm of the Ministry of Agriculture. It has a population of 4,088 and 870 employees, including 120 professional and technical personnel of various types and 20 with intermediate or higher professional titles.

It covers an area of ​​45,000 mu, with an annual output value of 210 million yuan, of which 11,000 mu is inland, with an annual output of more than 11,000 tons and an output value of 110 million yuan. It mainly breeds famous and high-quality species such as soft-shelled turtle, bighead bream, yellow catfish, spotted catfish, tilapia, river crab, and yellow eel.

There is a large freshwater fish processing factory, Wuhu Pengxin Food Co., Ltd., covering an area of ​​60 mu, mainly processing tuna fillets, tilapia fillets and crayfish, with a daily output of 100 tons and a cold storage capacity of 1,500 tons. Waihu is a flooded area of ​​the Yangtze River tidal flats, with an enclosure area of ​​34,000 mu, an annual output of more than 9,000 tons, and an output value of nearly 100 million yuan.

We release grass carp, bighead carp and other fish species that simulate their wild growth, and raise river crabs, carp, mandarin fish and other famous and high-quality species. We fully utilize natural resources such as green grass, snails, clams in outer lakes and wild fish in the Yangtze River, so that our products meet green food standards.

2. How about Qingbaolu Tilapia

good.

Qingbaolu tilapia has a wide range of diet, a voracious appetite, a high back, thick meat, and a high meat yield, and is highly favored by fish fillet processing plants.

Tilapia is very easy to raise, but if you want to raise it for eating, you still want to choose a water source with better fluidity, so that the fish will taste delicious.

3. How much do you know about tilapia farming technology? Can you share it?

1. Selection and breeding of broodstock

Select purebred Aurelia tilapia as the male parent and Nile tilapia as the female parent. Select parents with small heads, healthy bodies, clear and neat patterns, bright colors and no damage. Breed them in a ratio of 3:1 between males and females. During the breeding process, they will float completely naturally and the male rate can reach more than 90%.

2. Economic evaluation of Onilofi

1. High male rate: Oniro is a pure natural hybrid breeding, with a male rate of more than 90%, which has obvious hybrid advantages. Its morphology is similar to that of the father, but the individual is larger than the parent. In the breeding process, small seedlings and mixed seedlings are greatly reduced, so that feed is effectively used and breeding costs are reduced.

2. Fast growth rate: Through breeding experiments and comparison, under the same breeding conditions, the daily weight gain of Onyx tilapia is higher than that of conventional seedlings, Pocillopora and drug-induced monosex tilapia. Spring seedlings hatched in the same year can generally reach the market specification of more than 500 grams after 6-7 months of breeding, and the individuals are uniform.

3. Cold resistance and high catch rate: Oni Tilapia can still survive at 8℃, and its lethal temperature is 6℃, so it has obvious cold resistance. In southern my country, ordinary simple greenhouses can safely overwinter; Oni Tilapia is easy to catch, and generally more than 90% can be caught with two nets, and three nets can basically catch all the fish, without the need to dry the pond, which greatly reduces the workload.

4. High meat yield: Oni Tilapia has a small head and round body, high back and thick meat, with a meat yield of more than 0.38, which is higher than the 0.28 of ordinary tilapia, an increase of more than 10%. Therefore, Oni Tilapia is particularly suitable for processing fish fillets for export, and is favored by aquatic product processing companies and export dealers, further promoting and expanding the scale of tilapia farming.

5. Comparison with monosexual tilapia or all-male tilapia: Monosexual tilapia or all-male tilapia is actually a fish that is fed with methyltestosterone (male hormone) after hatching. After about four weeks, the females will degenerate, thereby increasing the male rate. If the effect is good, the male rate can reach more than 98%. At present, monosexual tilapia fry in the domestic market that claim to be all-male or even 100% male are all produced using this method. It is difficult to achieve this standard under natural hybridization.

All tilapia species can be induced by drugs to produce so-called all-male tilapia. Although the problem of over-breeding of tilapia is solved, the growth rate may not be improved, and the individual adult fish are not uniform. In summary, the Onyx tilapia has become the preferred high-quality species for freshwater aquaculture and has been widely promoted in various provinces and cities in my country, especially in the export of processed fish fillets. It not only improves the meat yield, but also has no drug residues, avoids trade disputes, and has an absolute advantage in competition.

3. Seedling cultivation and fish farming

1. Pond preparation: 3-5 mu is the best area, with a flat bottom. 10 days before stocking, sprinkle 60-70 kg of quicklime per mu throughout the pond to clean and disinfect it. 2-3 days later, apply 75-100 kg of farmyard manure such as chicken manure and pig manure per mu, fill the pond to one meter, and release the fry when the water color turns brown or oily green.

2. Stocking and matching of fish species: In the southern region, when the temperature rises and stabilizes (water temperature is above 18°C) in mid- to late April, stocking of fish species is carried out. 2,000 to 2,500 Onixia flower carps of 3.0 to 3.5 cm in size, 40 large-sized silver carps, and 30 bighead carps are stocked per mu. A small amount of carp and crucian carp can also be added.

3. Early feeding: After releasing the fry, mix the soaked peanut cake or rapeseed cake evenly, sprinkle it along the edge of the pond to the center, and feed 1.5-2 catties per mu per day. After one month of breeding, the fry can grow to about 10 cm and weigh 10-12 grams.

4. Mid- and late-stage management

(1) Feeding: The growth temperature of Onyx tilapia is 22-32°C, and it has a strong appetite. The feeding range should be wide, and all fish species should be fed evenly as much as possible. Its feed includes rapeseed cake, bran cake, wheat bran, peanut cake, bean cake, etc. It is best to use a mixture. If conditions permit, feed tilapia complete feed twice a day, 9:00-10:00 in the morning and 4:00-5:00 in the afternoon. Daily feed amount: 10-20 grams body weight, 5-7%; 20-50 grams, 4-6%; 50-100 grams, 3-5%; 100-200 grams, 2-4%; above 200 grams, about 2% of the fish body weight.

(2) Water quality control: From mid-May to June, water can be gradually added to 1.5 meters. July and August are the hot seasons, so water should be added to about 1.8 meters. If conditions permit, it is best to change the water once a week to keep the water quality fresh and prevent pond flooding.

(3) Fish disease prevention: Adhere to the principle of giving priority to prevention and giving equal importance to prevention and treatment. Before stocking, fish can be washed with 4-5% salt water for 10-15 minutes. May to September is the season when fish diseases are more common. Every half a month, bleaching powder 1ppm or quicklime 20 kg/mu can be sprayed throughout the pond. When there are signs of fish disease, antibiotics and vitamin baits can be used for feeding for 3-5 days.

Selection of seedlings. Select tilapia fry with smooth and undamaged body surface, strong physique, plump body, uniform size, high male rate, and size of about 5 cm. After washing with 5% salt water or 5-10 mg/L potassium permanganate solution, put them into the fish pond.

Make sure the water is clear enough, choose a place with less noise, choose a place with convenient transportation, choose high-quality fish species, and disinfect the pond.

Be sure to choose a place that is sheltered from the wind and facing the sun, and also pay attention to the proper use of feed and choose a place with convenient transportation.