What is intensive fish farming?
In intensive aquaculture, unnaturally high concentrations of organic matter are produced and released into the environment in the form of particulate and/or soluble substances (mainly uneaten fish feed and feces and other excretory wastes) (Cloern, 2001; FAO, 2006).
Is fish farming intensive or extensive?
to fish farming conducted in medium- to large-sized ponds or water bodies; the fish production relies merely on the natural productivity of the water which is only slightly or moderately enhanced. … Intensive fish farming, on the other hand, implies that the quantity of fish produced per unit of rearing area is great.
What is intensive culture in aquaculture?
Intensive culture uses very high densities of culture organism (e.g., 200 000-300 000 shrimp PL/ha/crop) and is totally dependent on artificial, formulated feeds. Both systems use small pond compartments of up to one ha in size for ease of management.
Which conditions are controlled in intensive fish farming systems?
All nutritional requirements of the fish are provided by artificial/commercial feeds. The existence of life food is not allowed in the field. Important environmental conditions is under control, measuring water temperature, dissolved oxygen, pH and salinity.
How many fish can you have in a 1 acre pond?
Stocking density and ratio. A pond having an average water depth of 2.0-3.0 m can be stocked at the rate of about 5,000 fingerlings/ha. However, it is advocated 6,000-12,000 fingerlings/ha in the pond having an average water depth of about 2.5 m.
What is the most profitable fish to farm?
For the last 30 years, the high end of fish farming has been dominated by Atlantic salmon, a $15.4-billion industry. Atlantic salmon has become one of the most profitable fish to grow and is slightly better than chicken in terms of how well it converts feed into body mass.
Why is fish farming bad?
Fish farms, or “aquafarms,” discharge waste, pesticides, and other chemicals directly into ecologically fragile coastal waters, destroying local ecosystems. … Waste from the excessive number of fish can cause huge blankets of green slime on the water’s surface, depleting oxygen and killing much of the life in the water.
What is the major problem in fish farming?
So a major problem in fish farming is the lack of availability of good quality seed. To overcome this problem, now some ways have been worked out to breed these fish in ponds using hormonal stimulation. This has ensured the supply of pure fish seed in desired quantities.
How much we can earn from fish farming?
1.75 lacs by Investment of Rs. 25K Annually. On an average he earns Rs 1.75 lakh from it by incurring an annual expenditure of Rs 25,000 only.
What are the 3 main types of aquaculture?
Particular kinds of aquaculture include fish farming, shrimp farming, oyster farming, mariculture, algaculture (such as seaweed farming), and the cultivation of ornamental fish.
What is intensive & extensive fish culture?
An intensive fish farming system is the well-managed form of fish farming, in which all attempts are made to achieve maximum production of fish from a minimum quantity of water. This system involves small ponds/tanks/raceways with very high stocking density (10-50 fish/m3 of water). Fish are fed wholly formulated feed.
Why is there a need for fish culture in our country?
Most of the production comes from the farming of seaweed, milkfish, tilapia, shrimp, carp, oyster and mussel. Aquaculture contributes significantly to the country’s food security, employment and foreign exchange earnings. Aquaculture is growing much faster than capture fisheries.
What are the two types of aquaculture?
Aquaculture is a method used to produce food and other commercial products, restore habitat and replenish wild stocks, and rebuild populations of threatened and endangered species. There are two main types of aquaculture—marine and freshwater.
What is the difference between extensive and intensive aquaculture systems?
Intensive aquaculture involves intervention in the growing process, such as with supplemental feeding and water aeration (such as prawn farming), whereas extensive aquaculture allows the stock to grow on its own, using natural food sources and conditions (such as oyster farming).
What are the advantages and disadvantages of semi intensive system?
The principal advantages of this system are easy access for feeding, watering and egg gathering, good protection and reasonable investment. The principal disadvantage is the need for high quality litter.