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
Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge
Unusual soybean coloration sheds a light on gene silencing
20.06.2017 | University of Illinois College of Agricultural, Consumer and Environmental Sciences
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Physics and Astronomy
23.06.2017 | Physics and Astronomy
23.06.2017 | Information Technology