Types of fish farming – Explained!
Fish Farming System and types of Fish: Raising suitable fish species in isolation and managing their activities to improve reproduction is known as fish farming in the United States. Similar to farm animals, fish are raised in farms or hatcheries.
People fished in lakes, streams, and oceans prior to fish farming. Back then, hunters domesticated animals and planted crops, while fishermen caught and raised wild fish. Fish farming began in China as early as 500 BC. The ancient Greeks farmed oysters in Gaul and Rome. 450 years ago, Magellan saw local fisherman gathering newborn milkfish and raising them in ponds with saline water.
Types of fish farming
Fish farming can be divided into
two categories: intense, which feeds fish from outside the area, and extensive,
which is based on local photosynthetic output. Nonetheless, the following lists
common varieties of fish farming.
There are two primary varieties
of fish farming: intensive, in which fish are fed from outside the aquarium,
and extensive, which is based on local photosynthetic production. Nonetheless,
the common varieties of fish farming are listed here.
Monoculture:
This technique is typically used in the commercial
culture of fish under strict supervision. In this case, natural food is not as
important to fish farming. A well-balanced diet and food are used to culture
fish with high market pricing. However, fish are raised in our nation's
seasonal ponds employing the monoculture technique even under the widely used
management scheme.
Polyculture:
Polyculture is the term for the
culture technique used when more than one species of fish are kept in a body of
water. Different varieties of fish are placed in water bodies based on the best
utilization of the natural food sources found there. In this instance, the fish
that are stocked typically have distinct eating habits. Polyculture produces a
higher yield than monoculture under a regular management strategy. For
instance, co-cultivating paddlefish, tilapia, big head carp, common carp, etc.
Land-based fish farming
Fish raised on land are typically
kept in artificial ponds or tanks. This kind of farm is advantageous since it
may be situated close to towns and cities, which makes it simpler to deliver
fresh fish to customers. Additionally, compared to other farming practices,
land-based farms consume less water, which is significant considering the
condition of the planet's water supplies today. Nevertheless, there are certain
disadvantages to this kind of agriculture. One problem with land-based farms is
that they can generate large amounts of trash, which, if improperly managed,
can contaminate rivers. Furthermore, diseases and pests can travel quickly from
one farm to another through runoff from surface or groundwater.
Fish culture in cages:
In Bangladesh, cage-based fish
culture is a relatively recent technique of fish farming. However, some Asian
nations, including Indonesia, China, Thailand, the Philippines, Vietnam, and
Nepal, have long engaged in the practice of raising cage fish.
Fish monoculture can be carried out in cases constructed from locally accessible, easily obtainable materials in any type of open water, including floodplains, rivers, streams, and canals. The cage is often appropriate for fish monocultures. Cages can also be used for the polyculture of some fish species.
Even if the administration of a
balanced diet and feed is essential to this kind of fish culture, fish culture
in cages can also be profitable when feed is given out for free or at a very
cheap cost. A substantial investment in cage cultivation is not necessary. As a
result, the development of cage culture in our nation's waterways is quite
promising.
Fish farming via closed confinement occurs in big tanks or pools housed inside sheds or buildings. This kind of farm has the advantage of minimizing interaction between the environment outside the building and the farmed animals, so limiting the spread of illness. In addition to recycling almost all of their own water, closed containment systems save resources. Higher building costs (resulting from the requirement for complex engineering) and equipment failures and power outages are drawbacks.
Integrated fish culture:
Integrated fish culture involves growing multiple crops in a body of water at the same time in order to maximize yield and preserve environmental equilibrium. For instance, raising fish in rice fields, raising poultry and fish together, growing vegetables in pond dykes, raising fish and cattle, etc.
Integrating various agro-farming
practices, such as raising chickens, ducks, cattle, vegetables, and other
crops, with fish culture is the fundamental idea behind integrated fish
culture. In this case, the input cost of fish culture significantly drops, but
in exchange, one or more additional crops are produced in addition to fish.
Although integrated fish farming
has been the subject of much discussion lately, it has been practiced in
Bangladesh and other Asian countries for a considerable amount of time. To
strengthen our nation's economy, which is mostly dependent on agriculture,
integrated fish culture needs to be quickly spread and popularized.
Fish culture in pen in the floodplain:
The management of stocked fish in
a floodplain area surrounded on one or more sides by a bamboo frame, other
fencing, or nets is known as fish culture in a pen. This kind of fish farming
is characterized by the fence's base being planted in the mud at the bottom of
the body of water and the pen's water being well-connected to the outside water
(water flow between pen and floodplain).
Fish culture in pens is a
relatively new practice. During the third decade of the 20th century, pen culture
technology began to spread, first in Japan and then in China and other Asian
nations. Malaysia, Thailand, Indonesia, the Philippines, and other nations have
recently used pen culture technology extensively for the commercial production
of fish. Even in Bangladesh, there is a great deal of opportunity for
commercial fish culture in pens.
Extensive fish culture system:
Under this kind of management, fish are cultivated for very little or at no expense. A small amount of fish fries are thrown into the pond. Fish in the pond eat just the natural food that is found in the water; neither fertilizer nor additional feed is required.
Furthermore, in the comprehensive
fish culture approach, neither any initiatives nor technical issues of fish
farming are taken into consideration. Consequently, the annual production of
fish per decimal is limited to 1-2 kg. One illustration would be to release
fish into the pond carelessly, without following the step-by-step instructions
for fish culture, and with irregular fish harvesting.
Improved extensive culture system:
a little better culture
management, whereby aquatic weeds and weed fish/predatory fish are removed
before fish are supplied at a relatively low density. Other scheduled fish
culture procedures are also carried out erratically, in addition to the
administration of fertilizer and feed. Currently, the most popular kind of
cultural management is this one. Fish production with the enhanced extended
culture method ranges from 5 to 12 kg/dec per year.
Semi-intensive culture system:
The required renovation of the
water body, total control over the stocking density of predatory and weed fish
medium, regular fertilizer and hand-made feed application, partial harvesting
and restocking following three to four months of fry stocking, and, if
necessary, water exchange and oxygen supply (aeration) are all carried out in
the semi-intensive culture system. In other words, a semi-intensive culture
system is used to practice several contemporary fish culture technologies. Fish
productivity under this kind of culture management may exceed 15–30 kg per
decimal year.
Intensive culture system:
An intense culture system
involves the use of cutting-edge technologies to cultivate fish following
expensive infrastructure restoration when required. It needs a significant
financial commitment and hard work. An intensive culture system can be quite
risky and have an adverse effect on the environment, despite its great
profitability.
Examining Fish Farming: Kinds, Importance, and Optimal Methods
Fish density per unit area,
product destination, and investment can be used to differentiate between
different types of fish farming. One important feature is the degree of
intensification, which is dictated by feeding techniques.
Depending on the intensity, fish
production is split into three sectors:
a) Artisanal (small scale):
This method offers the best
conditions for input supply and fish marketing, and it is mainly applied in
suburban regions. Work in this small-scale, labor-intensive industry is usually
done by families. The two sub-sectors are flood pond fisheries, which are
seasonal and dependent on the use of flood plains, and riverine and lake canoe
fisheries.
b) Aquaculture (fish farming):
The word "culture" refers to practices like feeding, replenishing, and predator protection that are employed to boost output throughout the raising stage. It also suggests that the breeding stock is lawfully or privately owned.
c) Industrial fish farming:
The industry of fish farming is concentrated on large-scale production facilities and financial goals. Fish farming is a tool for development as well as a method of production. Although it was once thought that low-tech techniques would be adequate for fish farming, advanced intensive models have shown to be more successful.
Because of their clearly defined
parts and regulated environments—like cages in lakes or rivers—intensive
systems are simpler to transfer. Intensive systems produce greater results even
when their production costs are higher.
The risk of illnesses and hefty investment costs are among the first challenges faced by intensive fish farming, which could take many years to start producing good fish. It necessitates setting up processing and marketing facilities, preserving and transporting supplies, and training technicians.
Fish is used in industry to make
fish meal, minced fish products, salted press cake, concentrations of fish
protein, and oil products like cod liver oil and OMEGA-3.
The significance of fish:
(1) Protein source: When it comes to
protein sources, fish is the least expensive than meat, chicken, hog, and
mutton.
(2) Employment: It generates jobs for
cold shop staff, research center personnel, university employees, and fishers.
(3) Income generation: Through
exporting goods, it generates foreign exchange earnings and pays state and
municipal governments.
(4) Cooperation on a global scale:
Enables African nations to take part in international organizations such as
FAO, UNDP, and IFAD, which offer financial support for rural development in the
fishing industry.
(5) Rural development: Through direct
government action, helps to improve the standard of living for fishermen and
other stakeholders.
(6) Food security: Provides highly
nutritious animal protein and essential micronutrients; also helps with food
availability, employment, and income.
Types of cultural fish production practices:
a) Traditional pisciculture: This
method, which depends on food that is found naturally, can be used in all kinds
of water bodies with low productivity.
b) Intensive culture: In fish
farming, different species are cultivated according to supply, demand, and
profitability in the market. A consistent supply of water, organic fertilizer,
and sufficient fish feed are necessary for success. The water source needs to
be selected carefully and kept apart from other uses.
b) Composite culture/polyculture:
Six species, including major and foreign carp species, are raised in this
farming method. Various feeder fish levels increase output, enabling complete
feed use. Fry, fingerlings, and table-size fish are produced by it. The use of
the entire water body, higher farmer income, and maximum production are
benefits of composite culture. Its operation does, however, necessitate higher
revenue, several harvestings, more time, effort, and a sizable body of water.
d) Integrated culture: This
method includes raising fish with other agricultural pursuits including raising
livestock, raising vegetables, producing rice, and raising poultry. Resources
that are available locally can be used for it. Several farming practices can
coexist in one location thanks to integrated culture, which also offers the
benefits of effective water and land use management and an extra revenue
stream. The practice's drawbacks include the requirement for more capital and
manpower as well as its exhausting nature.
e) Mono-species culture: This
kind involves the culture of a single species, such catfish or a particular
alien species. Benefits include reduced energy needs, time savings, and ease of
harvesting. The species on the site compete with one another for food, water
levels are not fully utilized, and production is lower than in polyculture—some
drawbacks.
