Farming is not a one-day affair; rather it requires several days of hard work and proper agricultural procedure to be followed to get the intended output. A range of farming practices has been emerged to increase the productivity, of the agricultural land. Two such farming practices are intensive farming and extensive farming.

Intensive Farming is a farming method that uses higher inputs and advanced agricultural techniques to increase the overall yield.

In contrast, Extensive Farming is one in which more and more land is brought under cultivation to increase the output produced. This article excerpt is presented to give a clear view of the difference between intensive and extensive farming, followed in different parts of the world. Basis for Comparison Intensive Farming Extensive Farming Meaning Intensive Farming refers to an agricultural system, wherein there is high level use of labor and capital, in comparison to the land area.

Extensive Farming is a farming technique, in which large farms are being cultivated, with relatively lower inputs, i. Population It is practiced in densely populated region. It is practiced in moderately populated region. Intensive farming refers to the intensification and mechanization of the agriculture, with the objective of increasing the productivity of a particular land. This is possible through the high-level use of inputs such as capital, labour, fertilizers, insecticides, pesticides, weedicides etc.

In this system, the use of inputs is comparatively higher than the land area. It can be applied in animal husbandry too, wherein a large number of cattle are reared in small space, as the law of the concerned jurisdiction allows.

Further, medication for livestock is adopted to increase their productivity. The essence of intensive farming is that it depends on the chemicals to accelerate the growth and increase the crop yield. Extensive Farming is a system of cultivation, which uses limited inputs, i. In this method, traditional methods of farming are given preference.

Further, the productivity is based on the natural fertility of soil, climate and terrain of the area and so it is practised in large farms to achieve higher yields and to achieve profitability. The total crop production is high, due to large land holding, but the low in terms of per unit production. Due to less use of chemical fertilizers and pesticides, it is an environment-friendly method, as it does not damage the environment.

The points given below are substantial so far as the difference between intensive and extensive farming is concerned:. To sum up, the primary focus of intensive farming is on the quantity of the crop produced, whereas extensive farming stresses on quality. Intensive farming causes damage to the environment, as there is a high usage of chemicals which not only reduces the fertility of soil but also contaminates the food, which is not in the case of extensive farming.

This really helps a lot. This tells different methods used for farming.In the pictures above, you can see some of the aquaculture systems that are used around the world. Aquaculture systems range from very extensivethrough semi-intensive and highly intensive to hyper-intensive. When using this terminology the specific characterization of each system must be defined, as there are no clear distinctions and levels of intensification represent a continuum.

The phases of aquaculture include broodstock holding, hatchery production of seed, nursing systems, grow-out systems, and quarantining.

Together, this mix of intensity, culture systems, species, farming systems and different phase of culture create an extreme diverse collection of aquaculture systems and technologies. Leave a comment. Posted in Uncategorized. Tagged aquacultureextensiveintegratedintensivesemi-intensive. The World of Aquaculture. Aquaculture is the fastest growing food-producing sector worldwide. This blog was born on the need to share reliable and interesting information about this exciting world.

Skip to content. Home About. Land-based systems rainfed ponds, irrigated or flow-through systems, tanks and raceways. Recycling systems high control enclosed systems, more open pond based recirculation.

Integrated farming systems e. Various aquatic organisms are grown in different ways including: Fish ponds, polishing ponds, integrated pond systems. Molluscs bottom, pole, rack, raft, long-line systems also culture based fisheries Crustaceans pond, tank, raceway, culture based fisheries. Other minor invertebrates, such as echinoderms, coelenterates, seahorses, etc tanks, ponds, culture based fisheries The phases of aquaculture include broodstock holding, hatchery production of seed, nursing systems, grow-out systems, and quarantining.

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intensive semi intensive and extensive aquaculture ppt

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Intensive Recirculating Aquaculture Systems (RAS)

WordPress Embed Customize Embed. URL: Copy. Presentation Description about aquaculture. Farming implies some form of intervention in the rearing process to enhance production, such as regular stocking, feeding, protection from predators, etc. Other species from among the several thousand that are exploited by capture fisheries could ultimately be farmed The appropriate legal framework for most modern aquaculture technologies is known now a day.

Agriculture vs. Aquaculture: Agriculture vs. Plant and animal seed stock is obtained from nature. Cost, technology, stocking rates, and production levels are low. Types of Aquaculture : Types of Aquaculture Semi-intensive aquaculture involves a combination of some attributes of extensive and intensive aquaculture.

It is usually done in men-made ponds and raceways. Cost, technology, stocking rate and production levels are all intermediate. Types of Aquaculture : Types of Aquaculture Intensive aquaculture involves high degree of control over the systems. Seed stock is produced from domestic brood stock within the system. Cost, technology, stocking density, and production levels are all high. Integration occurs when outputs usually by-products of one production sub-system are used as inputs by another, within the farm unit: Semi-intensive system.

Especially Bivalves Like Mussels. Consist of wood and some sort of Float and Moor.

Aquaculture Systems of The World

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Products Sold on our sister site CrystalGraphics. Title: Fish Farming. Description: Fish farming is the main form of aquaculture-the breeding of aquatic species under controlled environments.

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intensive semi intensive and extensive aquaculture ppt

Title: Fish Farming 1 Fish Farming 2 What is Fish Farming Fish farming is the main form of aquaculture-the breeding of aquatic species under controlled environments.

Since it is in a greenhouse, the system can adapt almost all climates. Irrigation ditch or pond systems- A pond or ditch that can retain water is the main requirement for this system. A constant control of water quality is crucial to keep the fishes electrolyte level correct. Cage system- uses a cage in any type of existing water sources.

Fish are kept in cage until they are ready to harvest. Classic Fry Farming- fish are raised in concrete tubes with a constant flow of fresh water running through. When ready the fish are released back into fresh water. The farm bred fish are much fattier than wild fish and contain less protein. Farm bred salmon are fed dye to color them pink, otherwise the salmon would be an ugly grey color.

Many fishes that are farm bred are fed antibiotics and are exposed to many different pesticides. Farm raised fish are raised in small compacted areas that can result in an increase chance of the fish having disease. The farm bred fish also have less amounts of omega 3 fatty acids, which is a needed fatty acid in our everyday diet.

Since the fish live in tight impacted living spaces, they are more susceptible to disease. In certain fish farms the disease is spread to wild fish living in nearby waters. Toxins are stored in fat of the fish, since the fish are fed high fat diets they have higher level of toxins. Some farm bred fish escape from their farms and begin to breed in the wild.

Some farm bred fish are more aggressive and may chase certain breeds from their territory. The Pacific salmon are at a steady decrease in population with farm bred fish moving in on their territory, the pacific salmon will reach the point of extinction at a much faster rate. Farm bred fish have higher levels of mercury and contaminate nearby fish in the local waters.Aquaculture productivity has progressively increased over the last 50 years. Algal photosynthesis suppresses ammonia levels at algal productivities of 0.

Exceeding this level of production requires enhanced algal productivity, or pond flushing with discharge of ammonia and VSS to the environment. In the U. To further increase production to "super-intensive" levels, farmers turned to alternative biological treatments techniques, fixed-film nitrifying reactor trickling filtersor suspended-culture microbial reactors biofloc.

Trickling filters are economically favored in most finfish culture because of potential for higher volumetric density in fish as opposed to shrimp culture. In general, biofloc treatment is economically favored in shrimp culture, using nitrifying systems NS or heterotrophic systems HS.

How to Construct a Semi-intensive Pond for Aquaculture

HS require external organic supplementation in addition to feed application. The major advantage of HS culture is rapid growth rate of heterotrophic microbes providing nearly instantaneous control of ammonia levels. An added advantage of super-intensive aquaculture is the potential to provide "zero-discharge" systems, eliminating water and sludge discharge by converting microbial biomass production to useful byproducts.

Aquaculture America February 9 - 12, Honolulu, Hawaii.What is aquaculture? Aquaculture is one of the fastest growing sectors of food production in the world and there is much hope that it will be the supplement to dwindling wild fisheries 9.

Fish is the most important source of protein for many diets, particularly those in rural, coastal communities. Continually depleting stocks in wild fish populations have led to an increased interest in the aquaculture of commercial fish to supply this protein, as well as reducing the pressure put on wild populations. Aquaculture itself is the cultivation of the natural production of fish, shellfish and aquatic plants through close husbandry efforts 8.

Mariculture specifically refers to marine aquaculture; it is a specialized subset of aquaculture. Typically, aquaculture is used to cultivate fish and shell fish for seafood markets and human consumption, however, it also supplies exotic fish for the hobby industry and game fish for the growing sportfish industries. The aquaculture of seahorses looks promising.

intensive semi intensive and extensive aquaculture ppt

Industrialized nations have succeeded in rearing them, but not yet to the level which alleviates the harvesting pressures caused by the medicinal and hobby trades. The hope is that eventually seahorse aquaculture will become simple enough that it could be practiced by poor fishermen, thus providing an alternative to catching wild seahorses.

Aquaculture has been around for thousands of years. Ancient Chinese manuscripts from the 5th century B. The ancient Hawaiians furthered these methods by building pens to breed and raise Carp and Talapia 7. Since then, aquaculture has been vastly improved and separated into two major categories: intensive and extensive aquaculture.

Intensive aquaculture relies on technology to raise fish in artificial tanks at very high densities. Aquaculturalists must have a thorough understanding of the targeted species so that water quality, temperature levels, oxygen levels, stocking densities, and feed are set at the optimal level to promote growth, reduce stress, control disease, and reduce mortality Figure 1 4. Due to the complete control of these factors, intensive aquaculture produces high yields and since it can be done throughout the year, it can be planned to correspond with foreseeable shortages in desired fish.

Intensive aquaculture has a very high start up cost and requires much labor and currently, only rich countries have developed this into a profitable business.

The Difference Between Intensive and Extensive Properties

Research is being done to find viable species which can thrive in an aquaculture setting. Although intensive aquaculture is completely mechanized and self-contained it can have a detrimental impact on the environment. The biggest problem caused by intensive aquaculture is the difficulty in properly dealing with the nutrient rich effluent 4. Effluent contains high levels of both organic and inorganic nutrients like ammonia, phosphorus, dissolved organic carbon, dissolved organic nitrogen and dissolved organic phosphorus If not disposed of correctly the effluent could cause a number of problems including eutrophicationand hypernutrification Ingenious solutions have been developed to reduce the negative effects to the environmental caused by this effluent.

The most effective solution is the advent of aquaponics. Aquaponics is the combination of intensive aquaculture fish farming and hydroponics growing plants without soil Figure 2. Aquaponic systems use the nutrient rich effluent from fish tanks as fertilizers for produce.Aquaculture, compared to crop and animal farming, is much more diverse and varied.

There are many different species that are cultured each with different ecological requirements. They therefore have different feeding and breeding requirements as well as water quality. Production systems have therefore been developed to meet both the economic needs of the producer and the requirements of the species to be cultured.

Depending on the planned level of production and the resources available, the producer will make a choice from the following:. In these systems little or no input is used in the production. Fish are stocked in cages, still water earthen ponds and other water impoundments for example reservoirs and left to fend for themselves. Low stocking densities and thus low yields characterize the systems. The main cultured species are Tilapines e.

Farming Fish in Open Ponds

Oreochromis niloticuscatfish e. Clarias gariepinus and Cyprinus carpio. These are low input-low-output production systems. Majority of the small scale, subsistence fish farmers in rural Kenya fall in this category.

These systems form the bulk of aquaculture production in Kenya. In these systems still water earthen ponds and cages are used as holding units for fish culture. Still water pond culture uses the natural productivity of the water to sustain the species under culture. However to enhance productivity, the ponds are fertilized using both chemical and organic fertilizers at varying proportions to enhance natural productivity. Exogenous feeding using cereals bran and other locally available feeds is done to supplement pond productivity.

Polyculture of Oreochromis niloticusClarias gariepinus and Cyprinus carpio is practiced with various combinations of species. In these systems water flows in and out continuously flow through.

This allows higher stocking densities. The systems require good supply of good quality water. Less land is required to produce the same quantity of fish as compared to extensive and semi intensive systems. The systems employ mainly raceways, various types of tanks and floating cages as holding units.

In these systems, more fish are produced per unit area by complementing or substituting the natural productivity in the culture units by exogenous feeding using complete feeds the feeds are specifically manufactured for the species under culture and water aeration. Such operations require high initial capital investment and high operational cost. They are mainly suited for high value fish like the Rainbow trout.

This depends on the management levels employed by individual producers. This production can go higher with better management and quality feeds. Fish farming is a long term investment and therefore it is important to know land tenure system of the site. Conflicts may arise regarding land ownership. The topography of the land will determine whether it will be possible to construct fish production facilities and also the cost of construction.

The accessibility of the site throughout the production period is very important. Availability of power and other essential infrastructure should also be considered. The location of the site in relation to the market is also important. Fish are aquatic animals.