Key Technical Points and Detailed Explanation of Farming Methods for Running Water Fish Farming
Running Water Fish Farming Technology
Wealth Creation Network introduces running water fish farming technology to you: running water fish farming differs from still water fish farming and refers to the technology of farming fish in places where water flows, mainly referring to reservoirs, lakes, rivers and other such places. Running water fish farming has its own characteristics different from others.
Running Water Fish Farming
running water fish culture
A method of high-density intensive fish farming carried out in fish ponds with flowing water exchange. Generally, reservoirs, lakes, river channels, mountain streams, springs and other sources are used as water sources, and with the help of water level differences, diversion or interception facilities and water pumps, etc., water is made to flow continuously through the fish pond, or the discharged water is purified and then injected back into the fish pond. Because the water flow serves to input dissolved oxygen and remove fish excrement, the pond water can maintain good water quality, creating conditions for high-density intensive fish farming.
The main process of running water fish farming lies in controlling the fish farming environment so that it is favorable to the growth and development of fish and maximizes the growth potential of fish. At present, it has gradually developed from the primary form of normal-temperature running water to the use of computers for automatic monitoring and control of pond water flow, dissolved oxygen, water temperature, pH, the content of various inorganic and organic substances, as well as light and feeding amount, becoming a modern and highly efficient fish farming method. According to the mode of water flow, running water fish farming can be divided into two basic types: open type and closed recirculating type.
Open type: after the water source flows through the fish pond, it is no longer recovered, so water consumption is relatively large, and it is generally mostly used in areas with abundant water sources. According to whether the water temperature is controlled or not, it is further divided into two types: normal-temperature running water and warm running water.
Open-type normal-temperature running water fish farming is the primary form of running water fish farming. It has the advantages of small investment, simple pond construction and convenient management. It entirely uses natural water sources, and the water temperature is not regulated. Because the discharged water is not reused and new water is continuously injected, the water quality conditions are relatively good. In China in the past, mountain household fish farming or the keeping of ornamental fish in temples and parks mostly used this method. Since the 1970s, tilapia, carp, grass carp, blunt snout bream, eel, bass and others successively became farming targets of this form. In addition to farming food fish, fry and fingerlings are also raised. Because under certain conditions flow rate and yield show a positive correlation, when building ponds the terrain differences should be fully utilized so that the fish pond obtains a relatively large flow rate while at the same time water flow into and out of the fish pond does not require additional power. This is the key to whether normal-temperature running water fish farming can have production value.
The characteristic of open-type warm running water fish farming is that it can regulate water temperature. Natural water sources with temperatures higher than the air temperature (hot springs, deep wells) or warm discharge water from industrial and mining enterprises (mainly power plants) are used as the main or regulating water source and are injected into the fish pond together with natural normal-temperature water. By controlling the flow rates of the two, the suitable temperature of the pond water is maintained. Open-type warm running water fish farming can not only increase farming density, but also accelerate the growth and development of fish. In low-temperature seasons, it can keep the pond water at a temperature suitable for fish growth, thereby extending the growth period of fish, shortening their farming cycle, and promoting or inhibiting the gonadal development of broodstock. In low-temperature areas, using warm running water to cultivate broodstock can advance their breeding period, thereby increasing the rearing time of fry and fingerlings and creating conditions for cultivating large-size fingerlings.
Closed recirculating type is also called recirculating filtration fish farming. Its characteristic is that the sewage discharged from the pond is purified and then injected back into the fish pond, so the total water consumption is less than the previous two forms, and heating can be used to maintain a constant temperature of the pond water. The basic process of this method originated from aquariums. In the late 19th century, the Netherlands, the United States, the United Kingdom and other countries used the recirculating filtration method to treat fish farming water, allowing it to be reused for as long as several decades. In the 1960s, because the waters of many countries were polluted and the demand for live fish continued to increase, this farming method was introduced for the cultivation of fry and fingerlings and the production of food fish, and gradually developed into a new farming process.
Running Water Fish Farming
running water fish culture
A method of high-density intensive fish farming carried out in fish ponds with flowing water exchange. Generally, reservoirs, lakes, river channels, mountain streams, springs and other sources are used as water sources, and with the help of water level differences, diversion or interception facilities and water pumps, etc., water is made to flow continuously through the fish pond, or the discharged water is purified and then injected back into the fish pond. Because the water flow serves to input dissolved oxygen and remove fish excrement, the pond water can maintain good water quality, creating conditions for high-density intensive fish farming.
The main process of running water fish farming lies in controlling the fish farming environment so that it is favorable to the growth and development of fish and maximizes the growth potential of fish. At present, it has gradually developed from the primary form of normal-temperature running water to the use of computers for automatic monitoring and control of pond water flow, dissolved oxygen, water temperature, pH, the content of various inorganic and organic substances, as well as light and feeding amount, becoming a modern and highly efficient fish farming method. According to the mode of water flow, running water fish farming can be divided into two basic types: open type and closed recirculating type.
Open type: after the water source flows through the fish pond, it is no longer recovered, so water consumption is relatively large, and it is generally mostly used in areas with abundant water sources. According to whether the water temperature is controlled or not, it is further divided into two types: normal-temperature running water and warm running water.
Open-type normal-temperature running water fish farming is the primary form of running water fish farming. It has the advantages of small investment, simple pond construction and convenient management. It entirely uses natural water sources, and the water temperature is not regulated. Because the discharged water is not reused and new water is continuously injected, the water quality conditions are relatively good. In China in the past, mountain household fish farming or the keeping of ornamental fish in temples and parks mostly used this method. Since the 1970s, tilapia, carp, grass carp, blunt snout bream, eel, bass and others successively became farming targets of this form. In addition to farming food fish, fry and fingerlings are also raised. Because under certain conditions flow rate and yield show a positive correlation, when building ponds the terrain differences should be fully utilized so that the fish pond obtains a relatively large flow rate while at the same time water flow into and out of the fish pond does not require additional power. This is the key to whether normal-temperature running water fish farming can have production value.
The characteristic of open-type warm running water fish farming is that it can regulate water temperature. Natural water sources with temperatures higher than the air temperature (hot springs, deep wells) or warm discharge water from industrial and mining enterprises (mainly power plants) are used as the main or regulating water source and are injected into the fish pond together with natural normal-temperature water. By controlling the flow rates of the two, the suitable temperature of the pond water is maintained. Open-type warm running water fish farming can not only increase farming density, but also accelerate the growth and development of fish. In low-temperature seasons, it can keep the pond water at a temperature suitable for fish growth, thereby extending the growth period of fish, shortening their farming cycle, and promoting or inhibiting the gonadal development of broodstock. In low-temperature areas, using warm running water to cultivate broodstock can advance their breeding period, thereby increasing the rearing time of fry and fingerlings and creating conditions for cultivating large-size fingerlings.
Closed recirculating type is also called recirculating filtration fish farming. Its characteristic is that the sewage discharged from the pond is purified and then injected back into the fish pond, so the total water consumption is less than the previous two forms, and heating can be used to maintain a constant temperature of the pond water. The basic process of this method originated from aquariums. In the late 19th century, the Netherlands, the United States, the United Kingdom and other countries used the recirculating filtration method to treat fish farming water, allowing it to be reused for as long as several decades. In the 1960s, because the waters of many countries were polluted and the demand for live fish continued to increase, this farming method was introduced for the cultivation of fry and fingerlings and the production of food fish, and gradually developed into a new farming process.