Monday, 12 December 2016

VIDEO DISCUSSION

This video is about a group discussion title TIGER SHRIMP.




PART 1

PART 2


PART 3



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Friday, 9 December 2016

TOPIC 3 - LIFE CYCLE AND SYSTEM OF TIGER SHRIMP


Figure 1: Giant Tiger Prawn, Penaeus monodon

P. Monodon Taxonomy
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostracea
Order: Decapoda
Suborder: Dendrobranchiata
Family: Penaeidae
Genus: Penaeus
Species: P. Monodon



The giant tiger prawn, Penaeus monodon, is found in the Indian Ocean and western Pacific (Indo-West Pacific). The prawns are distributed from east and southeast Africa to northern and eastern Australia, Japan, Pakistan and the Malay Archipelago. It is cultured commercially in much of its range. Western Indian Ocean and western Pacific populations have separate evolutionary histories. The largest of all the cultivated shrimp, it can grow to a length of 36 cm and is farmed in Asia.

Figure 2: Life Cycle of Tiger Shrimp

The eggs are demersal and tend to sink while larvae are Planktonic. Prawn larva thrives mainly offshore and undergoes three main stages: nauplius, protozoea, and mysis. At the postlarval and juvenile stages, the prawn migrates toward the estuary. As it grows, it starts moving to the shallow coastal waters. The adult prawn inhabits the open sea.
Sexes are separate and can be easily distinguished through the external genitalia located at the ventral side. The thelycum in females and petasma in males. During mating, the male deposits the spermatophore inside the thelycum of the female. Mating can only occur between newly molted females and hard-shelled males. Spawning tanks place throughout the year. The eggs are fertilized in the water after the female simultaneously extrudes the eggs and the spermatophore. The number of eggs released by a single spawner varies from 248,00 to 811,000.

Eggs
The eggs are small, spherical, and vary from 0.25 to 0.27 mm in diameter. The developing Nauplius almost fills up the entire space inside the egg. At 28-30°C, the eggs hatch 12-17 h after spawning.

Nauplius Stage
Stage after eggs have hatched. The prawn Nauplius is very tiny, measuring from 0.30 to 0.58 mm in total length. It swims intermittently upward using its appendages in a “bat-like” manner. It is attracted to light and in aerated tanks, it will concentrate in the most lighted areas if aeration is stopped. The Nauplius molts through each of six sub stages for a total of about 1.5-2 days. The substrates differ from each other mainly on the furcal spine formula. The latter indicates the number of spines at each side of the furca.

Protozoea Stage
Its body is more elongated and measures from 0.96 to 3.30 mm in total length. It consists of the carapace, thorax and abdomen. It can also be distinguished by its movements, it swims vertically and diagonally forward towards the water surface.
The protozoea undergoes three sub-stages. The paired eyes of protozoea can be obscured as two dark spots in the upper portion of the carapace. These eyes become stalked at protozoea II. At protozoea III, the dorsal medain spine at the sixth abdominal segment first appears.

Figure 3: Eyestlak Ablation

Eyestalk ablation 
The removal of one (unilateral) or both (bilateral) eyestalks from a crustacean. It is routinely practiced on female shrimps (or prawns) in almost every marine shrimp maturation or reproduction facility in the world, both research and commercial. Two ways of eyestalk ablation is by incision and pressing the eye. The most commonly accepted theory is that a gonad inhibitory hormone (GIH) is produced in the neurosecretory complexes in the eyestalk. This hormone apparently occurs in nature in the non-breeding season and is absent or present only in low levels during the breeding season. By inference, then, the reluctance of most penaeids to routinely develop mature ovaries in captivity is a function of elevated levels of GIH, and eyestalk ablation lowers the high hemolymph titer of GIH. The effect of eyestalk removal is not on a single hormone such as GIH, but rather effects numerous physiological processes

Mysis Stage
Shrimp-like with the head pointing downward. Its body measures from 3.28 to 4.87 mm in total length. The telson and uropods are developed. The mysis swims in quick darts accomplished by bending the abdomen backwards. For mysis sub-stages, the most prominent change is the development of pleopods. The pleopods appear as buds at Mysis I, which protrude at Mysis II and finally become segmented at Mysis III.

Post larval Stage
The post larval resembles an adult prawn. At post larvaI the rostrum is straight and exceeds the tip of the eye.  Plumose hairs are present on the swimming legs.


THE HATCHERY FACILITIES

Larval and Post larval Tanks
Rubberized canvas, marine plywood, fiberglass, or concrete. These can either be circular, oval or rectangular, depending on the operator’s preference or financial capability. The capacity of each tank may be from 1-20 t but 10-12 t tanks are more economical and practical. Depth should only be about 1m because tanks which are too deep are difficult to manage.

Figure 4:Larval Tanks
Algal tanks
Minute plants (phytoplankton) are needed as food for the early life stages of prawn. Algal tanks must be shallow (ideally 0.5 m deep) to allow sufficient light prevention.

Spawning Tanks
It is advantageous to have smaller tanks with volumes ranging from 0.25 to 1 to where egg washing is done.

Artemia Hatching Tanks
Artemia or brine shrimp is a protein-rich live food organism given to prawn larvae starting at the Mysis stage. Artemia is available in cyst form which has to be hydrated and incubated in tanks for at least 18-24 h.

Reservoir
Storage tank is necessary for chlorination and holding of filtered and treated water for daily use. This must have a total capacity of at least 50% total larval tank volume.

Aeration System
Aeration is necessary in hatchery operations to keep food particles and algal cells in suspension and to maintain sufficient dissolved oxygen levels. Continuous aeration is essential during operations. A standby generator will be very useful during power interruptions.

Figure 5:Paddle Wheel Aerator
Preparation of Spawning, Larval, and Nursery Tanks
To prevent disease outbreak, the hatchery should be totally dried after several production runs. Tanks and facilities in the hatchery must also be cleaned well prior to a hatchery run. New tanks need to be filled with fresh or seawater for at least a week to avoid mortalities due to toxic effects of chemicals used during construction of the tanks.

Selection and Stocking of Spawners
Nauplius to be reared to the fry stage can come from broodstock wild or pond-reared immature females induced to mature by unilateral eyestalk ablation. Wild spawners female prawns caught from the sea with developed ovaries. The number of spawners needed for a hatchery runs is dependent of the nauplii requirement. For every million nauplii about 4-5 wild spawners or 7-8 m female broodstock are needed. Spawner procured as nauplii source must be carefully selected to obtain high fertilization and hatching rates of eggs. Stage of maturity should not be used as the basis for selection. Spawners must also be disease free. To ensure development of the eggs, females should be mated to ensure release of sperm cells necessary for fertilization.

Stocking of Nauplii
During stocking and throughout the culture period, prawn must not be exposed to abrupt changes in environmental conditions. The prawn must be given time to gradually adapt to new conditions to avoid stress and mortalities.

Feeding
Nauplii subsits on the yolk stored in their bodies. Larvae start to feed at the first protozoeal sub stage ( diatoms like Skeletonema or Chaetoceros) Larvae at the second protozoeal sub stage may be fed Tetraselmis. At the Mysis Stage, some fish protein must be present in the diet. Newly hatched artemia nauplii and microparticulate diets, most commonly used protein source which contain about 45-50% protein. When they reach the postlarval stage, egg custard, trash fish, mussel meat or ground dried acetes (small shrimp or alamang) can be given to supplement the Artemia nauplii diet.


Figure 6: Feeding the Prawns' Babies
Seawater Quality and Quantity
Seawater with minimum seasonal fluctuation in quality is most desirable. It should not be affected by inland discharges containing agricultural runoff or industrial wastes. Turbidity should be as low as possible. Adequate volume of seawater should be available when needed. The best method to determine the suitability of seawater for larval rearing is to conduct preliminary larval rearing experiments using pails or small tanks on the site. The production of post larvae with reasonable survival rate from eggs in a series of at least three runs would indicate the likelihood of success.

TOPIC 2 – PROBLEMS, RESEARCH AND FUTURE OF AQUACULTURE

PROBLEMS

Although there are a number of ways aquaculture benefits the environment, there are also several concerns regarding its use. In many cases, THE PROBLEMS have already transpired and have been re mediated. Regardless, aquaculture does pose some problems and concerns that have needed to be addressed.    

  • ENVIRONMENT: Like a giant aquarium, land-based fish farms must change their tanks' dirty water. Depending on the system's set-up, this can result in the discharge of significant amounts of wastewater containing feces, nutrients and chemicals into the environment. Nutrients can result in algae blooms which eventually remove dissolved oxygen in the receiving waterway, or eutrophication. A zero oxygen content results in fish kills. In addition, chemicals are commonly used in the aquaculture industry, such as antibiotics and water treatment agents.Aquaculture systems should be closed, or its wastewater treated prior to discharge.
  • DISEASE: Aquaculture operations can spread parasites and disease into the wild. Just as commercial chicken coops must be kept clean and are notorious for disease, farmed fish and shellfish are subject to the same circumstances. Farmed fish have an increased chance of getting parasites such as sea lice, as opposed to fish in their natural environment. Farmed fish are also exposed to diseases through the use of unprocessed fish to feed as their food source, as opposed to safer processed fish pellets.
  • ESCAPEES: Aquaculture is one of the largest causes in which foreign species are introduced into new areas, creating invasive species under the right conditions. Farmed fish can escape from their pens, damaging both the environment and threatening native fish populations. Invasives can compete for food and habitat, displace indigenous species, and interfere with the life of wild species. They can also carry diseases or parasites that might kill native species. In addition, escapees that are able to breed with the wild stock can dilute the natural gene pool and threaten the long-term survival and evolution of wild species.
  • SECONDARY IMPACTS: Because farmed fish need a food source, other wild species are threatened to be overfished for the manufacture of fish food. Because most farmed fish are carnivorous, they are fed either whole fish or pellets made from fish. Species such as mackerel, herring and whiting are threatened from the pressure to create food for other farmed species.
  • CONSTRUCTION: Both land-based and aquatic wildlife can lose their habitats through the building of aquaculture facilities along the coast, where clean and natural water can be accessed for its processes. In one famous example, in Asia and Latin America, mangrove forests have been cleared to make space for shrimp farm
  • FISH FEED REQUIREMENT: Farmed carnivorous fish, such as salmon, require a food source which is high in fish-derived proteins. This generally comes from wild capture fish at the bottom of the food chain, which are not usually marketed for human consumption.  There are two key challenges to developing a sustainable aquaculture industry. The first is to find a source of food for the farms which does not depend exclusively on wild fish being caught. The second is to ensure that any wild fish used as feed is caught in a sustainable manner. This is because removal of these species low in the food chain can have serious implications for fish stocks, the food web and other wildlife including sea mammals and seabirds.
  • SITES IN VULNERABLE HABITATS: There are a number of problems which stem from fish farms being located in inappropriate areas. These include vulnerable habitats (both terrestrial and marine), essential fish habitats or areas with high concentrations of wild fish. Some of the problems can include organic waste accumulation on the seabed under sea pens – resulting in localised degraded water quality  sea lice and other disease transfer; and altered foodwebs from escaped individuals as described below.
  • ESCAPEES: When fish escape from a farm open to the sea, this can lead to problems for the wider ecosystem. This is because escaped farmed fish can interbreed with wild fish of the same species, resulting in genetic dilution (domestic farmed fish can have low genetic variation); they can spread disease; they can displace eggs of wild fish and they can put pressure on natural resources through competition with wild fish.
  • ALIEN INTRODUCTIONS: Invasive non-native species are recognized as one of the main causes of global biodiversity loss. Recent reports suggest that this is a problem which is increasing. Aquaculture has benefited from the farming of alien species, but without proper management this can lead to altered ecosystems and biodiversity loss. An example of this is the introduction of the Pacific oyster into the UK. The Pacific oyster was introduced into UK waters in the 1960s for aquaculture purposes and it was seen as a more commercially viable alternative species to the native oyster. Since this time, the Pacific oyster has spread into the wild. Natural populations of the Pacific oyster can now be found in the Kent and Essex area resulting in reef formations which have displaced or modified some areas of the native oyster and biologically diverse marine environments.  Natural England has produced a report about this specific example.
  • POLLUTION: A range of chemicals can be used in marine aquaculture operations such as disinfectants, anti-foulants and medicines (including vaccines). These marine pollutants can be toxic to wildlife and can cause significant damage to the wider ecosystem, especially anti-foulants containing copper.
  •  ANIMAL WELFARE: Fish welfare can suffer in an intensely farmed environment where the stock density (the weight of fish kept in a given volume of water) is too high. Fish welfare concerns apply to the farming, transport, harvesting and slaughter process. The RSPCA has useful information on issues affecting fish welfareSea fish farms need to be better located in appropriate sites to avoid natural predators becoming a problem in the first place. The aquaculture industry would benefit from technological developments that prevent fish loss from predators without affecting the predator populations or their roles in ecosystem health.


RESEARCH OF AQUACULTURES


Research in Aquaculture involves many aspects of aquaculture in order to support the nation’s effort to promote large-scale sustainable practices. This group is equipped with facilities such as outdoor tank culture systems, in-door glass aquarium systems, feed making equipments, biochemistry and molecular laboratories. There are 3 core laboratories, Laboratory of Fish Genetics, Laboratory of Fish Nutrition and Laboratory of Fish Biology. The main research activities cover various aspects of aquaculture and aquatic organism related areas, including diet development, culture techniques, hatchery set ups, reproduction, biotechnology and population management. The Laboratory of Fish Genetics is focuses on population genetics studies to investigate local genetic population structure of cultured or endangered species. The Laboratory of Fish Nutrition is well known in the area of feed development; feed biochemistry for locally cultured species. In the Laboratory of Fish Biologyx various research projects dealing with larviculture, protein and DNA studies are carried out. Ornamental fish, an important branch of Malaysian aquaculture is also an important component of aquaculture research.

ShrimpNews.com posted a great article on July 5th, 2015 about India shrimp exports. It has reached an all time high, with the USA being the largest market. During India’s most recent fiscal year April 1, 2014, to March 31, 2015, abbreviated as “FY15” exports of marine products reached an all-time high of $5.5 billion. Shrimp accounted for 34% of the quantity of marine product exports and 67% of their value. The overall export of shrimp during FY15 was 357,505 metric tons, worth $3.7 billion.  The USA was the largest market for India’s shrimp (112,702 tons) followed by the European Union (81,952 tons), South East Asia (69,068 tons) and Japan (30,434 tons). (ShrimpNews.com).



FUTURE OF AQUACULTURES


FISH HARVESTED FROM AQUACULTURE MAKE UP 46% OF THE WORLD’S SEAFOOD SUPPLY (FAO 2010).

In the coming years, aquaculture will be the only way to fulfil mankind’s needs for animal proteins, due to the increasing human population, combined with stagnation of yields from capture fisheries. We share our expertise in the fish farming area and help you improve the productivity and profitability of your business. We create value for our customers by offering a wide range of integrated and complementary services, covering all aspects of the aquaculture business, from feasibility study to project implementation, farm management and technology transfer

FUTURE AQUACULTURE DEVELOPMENT

In summary, there is a need to develop aquaculture in Malaysia in order to reduce the high levels of exploitation and dependence on natural fisheries resources. This will provide the 250,000 tonnes of fish required by the year 1995 in Malaysia. There has been a tremendous increase in the disposal of effluents and wastes into freshwater bodies and coastal waters due to the development of both land-based industries and aquaculture. There has also been a growing awareness of the importance and need to preserve the environment. These are constraining factors that can slow down the present growth of aquaculture in Malaysia. To ensure that progress and growth of the aquaculture industry will not be affected by: (i) the lack of available suitable sites for aquaculture; and (ii) controls intended to promote and protect the environment, it is important that the Malaysian government adopts various strategies to look into the matters.

These should include:

  • Implementing and enforcing the present regulations, to establish zonings for the various aquaculture activities as has been done for some states;
  • Adopting aquaculture systems and management techniques that are environmentally friendly and which will promote sustainable aquaculture development of natural resources;
  • Enhancing the use of biological techniques rather than chemicals in aquaculture.

There is a need for aquaculture to be recognised as an emerging sustainable industry of value to the community that is likely to increase in size and value with time. As such, the industry should seek that planning and regulatory processes promote not inhibit  its future development. At the same time, the industry should develop and enforce its own code of practices for environmental protection and conflict amelioration and mitigation. Research in future should emphasise development of technologies that are environmentally friendly and that provide equitable social benefits. Sustainability should characterise every culture system that is developed.


SCOPE AND POTENTIAL FOR FURTHER DEVELOPMENT

There is considerable potential for further expansion and development of aquaculture in Malaysia, both in terms of available resources and supporting infrastructure and services. Aquaculture is being accorded due recognition by the government and has been identified as one of the thrust areas for development under the New Agricultural Policy (1991-2010). By year 2010, aquaculture production is projected to reach about 200,000 tons and contribute about 15% to the total fish production annually. Shrimp culture and fish culture are expected to be the main areas of growth. Although cockle culture is still expected to be dominant, its percentage contribution is projected to decrease from 70% to about 20%. Rapid growth of oyster culture is foreseen. 

The strategies for aquaculture development include:

 Development of new sites for the various culture systems 

Availability of potential sites for aquaculture is well recognized. Efforts are now being made to identify and map these areas for future planning, especially in the formulation and subsequent alienation of 'Aquaculture Development Areas' (Tan, in press). Mapping is done through remote sensing and geographical information systems. One of the setbacks in the past has been the indiscriminate alienation of land, sometimes in conflict with the interests of aquaculture, and resulting in low success rates and discouragement in the industry. Through zoning, further development and better management of aquaculture will be facilitated.  Construction of dams for various purposes in recent years has presented a vast resource for freshwater aquaculture. Most of the reservoirs (total surface area about 100,000 hectares) are not optimally used for fish production. Present government policy encourages the use of marginal agricultural lands near the coasts for brackishwater pond culture. Research is also conducted to develop cage culture systems in more exposed coastal waters and cockle culture in deeper waters.  


Development of new culture systems and species 

Malaysia has vast untapped ichthyofaunal resource. Research is needed to identify potential species for exploitation by the aquaculture industry. Introduction of new species adds impetus to aquaculture development. Demand for new varieties is very acute in the ornamental fish industry. Priority is being given to the indigenous riverine species such as Tor tambroides, Probarbus julleini, and Mystus nemurus. Marine and brackishwater species such as the seaweed Gracilaria sp., sea cucumber Stichopus variegatus, golden pomfret Trachinotus blochii, and abalone Haliotis sp. have been identified for further research. In addition, research is being initiated on the application of biotechnological and genetic principles in the improvement of cultured species. Such efforts include production of gynogenetic, polyploid, sex-reversed, and transgenic fishes.

 
 Refinement of present technologies

Efforts are also focused on the refinement of present hatchery and grow-out technologies to make them more efficient and cost-effective. Among the objects of research are the hatchery technologies for marine fishes, oysters, and mudcrab, and culture technologies for mudcrab, white 133 Downloaded by [122.55.1.77] from http://repository.seafdec.org.ph on November 26, 2016 at 11:18 PM CST ADSEA '94 Proceedings shrimp, and the freshwater prawn. Further research is also needed for the development of artificial feed for marine fishes, biomanipulation of culture ponds, and handling and post-harvest technologies.



Wednesday, 7 December 2016

TOPIC 1 - HISTORY OF AQUACULTURE AND AQUACULTURE PRODUCTION STATUS

HISTORY OF AQUACULTURE

In the historical past, aquaculture remained multilocational and isolated, each location having evolved its own pattern, until in recent times, when with the development of fast means of communication and travel bridging distances in progressively decreasing time, species are being cultured adopting a measure of standardised practices and sites when they are most suited.

The ‘Art’ of aquaculture is very old. The evidence that Egyptians were probably the first in the world to culture fish as far back as 2500 B.C. come from pictorial engravings of an ancient Egyptian tomb showing tilapia being fished out from an artificial pond. The Romans are believed to have reared fish in circular ponds divided into breeding areas. Culture of Chinese carps was side spread in China in 2000 B.C. writings in India made in 300 B.C. suggest means of rendering fish poisonous in the Indian sub-continent in times of war. This implies that fish culture prevailed in some Indian reservoirs. Some historical documents compiled in 1127 A.D. describe methods of fattening fish in ponds in India. Culture of Gangetic carps in Bengal in the Indian Sub-continent is of historical origin.

The Chinese carried with them their traditional knowledge of carp culture to the countries they emigrated like Malaysia, Taiwan, Indonesia, Thailand, Cambodia, Vietnam etc. In the Philippines, fish culture has been done in brackish water ponds for centuries. Eel culture in Japan is also very old.

In Central and occidental Europe, common carp culture developed along with monasteries in the middle ages. Later, with the development of pond fertilization and artificial feeding, carp culture got a new lease of life especially in Central and Oriental Europe. Simultaneously in Europe, salmonid culture began, fillip having been provided by salmon breeding and rearing techniques which were developed by them. Pollution in the aftermath of industrialisation, and hydro-electric development, led to restocking of open waters in Europe. This gave a new texture to development of aquaculture in Europe.

In North America, fish culture has developed from the turn of the century emphasis having been laid on trout for stocking in cold water and black bass in warm waters. Except for the referred culture of tilapia in Egypt, the origin of fish culture in Africa is recent. It was only at the end of II world war that efforts were made to introduce and develop fish cultivation. The prize species in Africa is tilapia, which, in recent years, has been extensively transplanted into many warm countries almost round the equator. Tilapia has been referred to as the ‘wonder fish’ of Africa and several attempts to popularise tilapia culture in various African countries did not achieve so much success as expected. In some countries mixed culture of tilapia and catfish (Clarias gariepinus) have achieved some success lately; aquaculture prospects and priorities for Africa are now subject to a fresh scrutiny in attempts to make it a successful venture, especially in view of its role in rural development.

Fish culture is only beginning in Latin America and most of the Middle-East. In Israel it has made phenomenal progress. Since World War II, four factors have contributed to rapid development of aquaculture. These are:
  1.  Facilities of fish transport by modern forms of communication bridging distances by quick  transport.
  2. Use of polythene bags and fish transported therein under oxygen with addition, when necessary, of transquilizer to water.
  3. Artificial propagation of farmed fish (e.g. by hypophysation) and its application to difficult-to-breed fish (e.g. Chinese and Indian carps) and development of hatching techniques to rear eggs and larvae.
  4. Availability of feed concentrates and their distribution in pellet form.

The fish which have figured most in inter-regional transplantation are rainbow trout, carp, certain species of tilapia (T. mossambica and T. nilotica) and Chinese carps (Ctenopharyngodon idella and Hypophthalmichthys mollitrix). Fish culture using some standard methods has in recent years got itself extended to many parts of the world. Fish breeding, artificial fertilization and pellet feeding, which at one time were applied to selected species, are now made applicable to many cultured species and, as time advances, more and more species are falling in line, though details vary. With further research in aquaculture, especially on production of fish seed and fish feed technologies, aquaculture in heading towards a quantum jump in years to come.





GLOBAL AQUACULTURE PRODUCTION STATUS 

Aquaculture is estimated to contribute 10.21 million tons in fish production in 1983. Group-wise breakdown of the contribution of aquaculture is:

Finfish
4.45 million tons
Mollusc
3.25 million tons
Crustaceans
0.12 million tons
Sea Weeds
2.39 million tons
Total
10.21 million tons

Region-wise aquaculture production (million tons) follows the following pattern:

Asia
8.41
Africa   
0.05
Latin America    
0.22
Europe
1.22
North America
0.31
Total
10.21


ASEAN AQUACULTURE PRODUCTION STATUS 
Figure 1: ASEAN aquaculture production in 2008. Land areas are adjusted proportionally to reflect production volumes.
ASEAN is globally an important aquaculture region, with ASEAN members of Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Thailand, Singapore and Vietnam together producing 11.3 million tons, around 17 per cent of the world total. Aquaculture is a significant part of the economy, food supply and rural livelihoods within ASEAN. Indonesia dominates the aquaculture production of the ASEAN region with a yearly production of 3.85 million tons, followed by Vietnam, Philippines and Thailand with 2.50, 2.41 and 1.37 million tons respectively (see Fig 1).

Figure 2: Asean production of aquaculture species groups (tons) in ASEAN countries in 2008. Seaweed constitutes the largest group, followed by catfish, shrimp/ prawn and carp.

Graph 1: Reported aquaculture production in Malaysia (from 1950)
(FAO Fishery Statistic)

In 1990, production from aquaculture was 52 302 tons. By 1994, production had doubled to 114 114 tons. In 2003, aquaculture production was at 194 139 tons at a value of USD 308 million - about 20 percent of the total value of the fisheries production in Malaysia.

Brackish water species accounted for more than 70 percent of the total aquaculture production in terms of value and quantity. Of these, blood cockles recorded the highest production, followed by marine shrimp and other freshwater species, such as tilapia, carps and catfish, as well as marine fish. Cockles account for almost 50 percent of the total brackish water aquaculture production, and about 37 percent of the annual aquaculture production.

However, marine shrimp accounted for the highest value of production, with about 65 percent of the total value of brackish water aquaculture production, and 52 percent of the total value of aquaculture production in 2003. Marine and brackish water aquaculture production recorded an increase of more than 20 percent in comparison to production in 2002. Freshwater aquaculture production, however, only recorded an increase of about 7 percent in comparison with production in 2002. 

Wednesday, 26 October 2016

INTRODUCTION OF GROUP MEMBERS

ASSALAMUALAIKUM AND HELLO GUYS !!
WELCOME TO OUR BLOG !!
DO CHECK ALL THE DETAILS ABOUT THE INTRODUCTION OF AQUACULTURE
AND OUR GROUP MEMBERS BELOW.


Introduction of Aquaculture


THIS IS OUR AWESOME GROUP MEMBERS. 
WE ARE FROM  BACHELOR OF  ENGINEERING (AGRICULTURAL AND BIOSYSTEMS).

WE HOPE YOU GUYS LIKE IT. THANKS FOR YOUR TIME. SEE YA !

AHMAD HILMI BIN MD SHARIF
177967

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178002

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177916

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