Malaysian scientists recommend ways for sustainable tilapia farming, an important resource for the country’s freshwater fish needs.
Fish farming, or aquaculture, began in Malaysia as early as the 1920s, with the 1990s ushering in intensive commercial production. It is a rapidly growing sector that has witnessed a growth rate of ten percent in the last five years. According to the Food and Agriculture Organization, Nile tilapia accounts for 44.7 percent of the total freshwater aquaculture production in Malaysia, followed by catfish and carps.
Despite rapid growth in the sector and the high potential of tilapia fish farming in Malaysia, poor development of the fish, high mortality, and losses due to disease and low economic return are common in tilapia farms.
To achieve sustainably high yields, Malaysia’s department of fisheries began a breeding program in 2002 to develop genetically improved farm tilapia (GIFT). Scientists at Universiti Sains Malaysia, the National Prawn Fry Production and Research Centre, and the World Fish Centre examined the strain’s growth performance and how genetic selection affected harvest weight over a ten-year period.
They found significant genetic improvement in harvest weight in the GIFT population and concluded that the strain was a valuable genetic resource for the aquaculture industry. They recommended the implementation of a systematic approach to brood stock management and dissemination to ensure the effective use and sustainability of the strain.
Genetic improvement is one way to boost fish farming in Malaysia. However, there remains a need for other measures to prevent severe economic losses due to infection of cultured tilapia with Streptococcus. This is a gram-positive bacterium that has caused considerable morbidity and mortality in cultured fish stocks worldwide. It is estimated, for example, that streptococcosis resulted in a loss of US $250 million in the cultured fish industry in 2008 alone. Recent outbreaks have been reported all over the Malaysian peninsula in wild and cultured tilapia and have resulted in high mortality rates.
Scientists at Universiti Putra Malaysia and the Fisheries Research Institute reviewed recent research to analyse potential control and prevention measures for streptococcal infection in cultured tilapia. Among their recommendations based on the review was the establishment of tilapia fish farms in sites with moderate rates of water flow, such as upstream in rivers and in irrigation canals.
They said that juvenile tilapia fish used for fish farming must come from disease-free hatcheries. Also, stock densities in fish farms need to be monitored and modified as fish size increases. And water quality must be continuously monitored, while antibiotics and vaccination regimes should be introduced, they said.
For more information about each research, please contact:
School of Biological Science
Universiti Sains Malaysia
11800 Minden, Penang
Tel: +(604) 4312 255; Mobile: +(6019) 4639 254
Department of Veterinary Laboratory Diagnosis
Faculty of Veterinary Medicine
Universiti Putra Malaysia,
43400 Serdang, Malaysia
Tel: +(603 8946 8282) ; Mobile: +(6012) 3952 921
About Pertanika Journal of Tropical Agricultural Science (JTAS)
Pertanika Journal of Tropical Agricultural Science (JTAS) is published by Universiti Putra Malaysia in English and is open to authors around the world regardless of nationality. The journal is published four times a year in February, May, August and November. Other Pertanika series include Pertanika Journal of Science & Technology (JST), and Pertanika Journal of Social Sciences & Humanities (JSSH).
JTAS aims to provide a forum for high quality research related to tropical agricultural research. Areas relevant to the scope of the journal include: agricultural biotechnology, biochemistry, biology, ecology, fisheries, forestry, food sciences, entomology, genetics, microbiology, pathology and management, physiology, plant and animal sciences, production of plants and animals of economic importance, and veterinary medicine. The journal publishes original academic articles dealing with research on issues of worldwide relevance.
For more information about the journal, contact:
The Chief Executive Editor (UPM Journals)
Head, Journal Division, UPM Press
Office of the Deputy Vice Chancellor (R&I)
IDEA Tower 2, UPM-MDTC Technology Centre
Universiti Putra Malaysia
43400 Serdang, Selangor
Phone: +(603) 8947 1622 | +(6016) 217 4050
Date of Release: 5 Apr, 2013.
The Chief Executive Editor, UPM Journals
Dr Nayan KANWAL, FRSA, ABIM, AMIS, Ph.D. | ResearchSEA
Microalgae food for honey bees
12.05.2020 | US Department of Agriculture - Agricultural Research Service
Global trade in soy has major implications for the climate
07.05.2020 | Rheinische Friedrich-Wilhelms-Universität Bonn
In meningococci, the RNA-binding protein ProQ plays a major role. Together with RNA molecules, it regulates processes that are important for pathogenic properties of the bacteria.
Meningococci are bacteria that can cause life-threatening meningitis and sepsis. These pathogens use a small protein with a large impact: The RNA-binding...
An analysis of more than 200,000 spiral galaxies has revealed unexpected links between spin directions of galaxies, and the structure formed by these links...
Two prominent X-ray emission lines of highly charged iron have puzzled astrophysicists for decades: their measured and calculated brightness ratios always disagree. This hinders good determinations of plasma temperatures and densities. New, careful high-precision measurements, together with top-level calculations now exclude all hitherto proposed explanations for this discrepancy, and thus deepen the problem.
Hot astrophysical plasmas fill the intergalactic space, and brightly shine in stellar coronae, active galactic nuclei, and supernova remnants. They contain...
In living cells, enzymes drive biochemical metabolic processes enabling reactions to take place efficiently. It is this very ability which allows them to be used as catalysts in biotechnology, for example to create chemical products such as pharmaceutics. Researchers now identified an enzyme that, when illuminated with blue light, becomes catalytically active and initiates a reaction that was previously unknown in enzymatics. The study was published in "Nature Communications".
Enzymes: they are the central drivers for biochemical metabolic processes in every living cell, enabling reactions to take place efficiently. It is this very...
Early detection of tumors is extremely important in treating cancer. A new technique developed by researchers at the University of California, Davis offers a significant advance in using magnetic resonance imaging to pick out even very small tumors from normal tissue. The work is published May 25 in the journal Nature Nanotechnology.
researchers at the University of California, Davis offers a significant advance in using magnetic resonance imaging to pick out even very small tumors from...
19.05.2020 | Event News
07.04.2020 | Event News
06.04.2020 | Event News
04.06.2020 | Life Sciences
04.06.2020 | Physics and Astronomy
04.06.2020 | Life Sciences