Farmers tend to maintain fresh water fish species, such as mackerel, mackerel, grassfish, bluefish, collectively known as four fish, and carp, mackerel and others, which are the country's main freshwater fish species。
1. Grassfish, the most common species in everyday life, and the low cost of raising grassfish
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Three, engineering, engineering, large, growing fast. Squid
4. Catfish, catfish, which are predators, prefers to eat small fish, which is free of stings and has a good taste, at a higher price than the previous ones。
Common fish can be divided into:
Herbivorous fish, such as grassfish, mackerel
Meat-eating fish such as catfish, horsefish, etc
Plankton edible fish, such as mackerel, mackerel, etc
Mixed fish such as mackerel, carp, etc
The freshwater fish that are mainly farmed in aquaculture are: mackerel, mackerel, grassfish, clitoris, carp, mackerel, mackerel, corset, etc。
In common freshwater-farming fish, the aphids are extremely low in oxygen resistance, and when oxygen is scarce in water they float. In general, the mackerel tends to float very rarely, and if it floats, there is a serious oxygen deficiency in the water。
Carp are grocer fish, which are characterized by adaptability, cold resistance, low oxygen tolerance, wide diets, rapid growth, breeding in static and flowing water, and are grown mostly in paddy fields, ponds and webboxes。
The mackerel, which is a culinary fish, is adaptable, resistant to low oxygen and can grow and reproduce in more alkaline waters. It is the main target of fish in our rice fields and is fed in pools with four other fish。
It's also called snowfish, which grows faster and tastes nicely, and is one of the key economic fish species in south china. Guangdong, guangxi, and guangxi, which often mix them with herbs, gillfish, etc., do not tolerate temperatures of less than 7°c and are therefore subject to cold measures by november。
There are about 2,000 known species of marine fish in our country, and the most common are fishy fish, yellowfish, salmon, etc。
What are the species of fish suitable for pond farming
I. Tropical fish
The most common species of tropical freshwater fish are rofe fish, freshwater whitefish, mackerel, barley, wildfish, sunfish, freshwater sandfish, brazilian guacamole, egyptian loice, etc
These fish have high water quality requirements and some water temperature requirements。
In the case of tilapia, for example, it is well suited to be farmed in ponds, where generally 667-1334 square metres of food are easily viable, where water temperatures range from 20-30 degrees, where temperatures below 15 degrees tend to make it impossible for tilapia to survive, and where eggs hatch, where water temperatures are required to reach 30 degrees, otherwise fertilized eggs are less likely to hatch。
Ii. Temperative fish
Temperative fish are the largest species in our country, and the common four-capita fish are also the hot fish。
The main species are grassfish, mackerel, mackerel, cyanide, carpfish, mackerel, mackerel, mackerel, mackerel, scallop, pangzawa, guangdong, etc. Most of these fish species have been growing for many years and are highly skilled in breeding techniques。
In the case of grassfish, for example, there is a certain demand for farmed ponds and water quality, preferably in the range of ph6. 6-7. 8, a good environment suitable for the growth of grassfish that is not susceptible to disease. Care also needs to be taken to maintain sufficient oxygen during farming to avoid the death of herbs from oxygen deficiency. Forage is to be carried out according to weather conditions and is to be delivered four times a day when the weather is good, and feed requires particulate feed with protein content of about 32 per cent。
Iii. Cold-water fish
Cold-water fish farming is less common in our country, usually in the north-east. This fish requires more stringent water temperature requirements, usually between 1 and 22°c。
