In this issue:

Peter Edwards writes on rural aquaculture: Recent developments in Chinese inland aquaculture. Reducing feed costs in aquaculture: Is the use of mixed feeding schedules the answer for semi-intensive practices? Seed production technology of ornamental gouramis Colisa fasciata and C. lalia under captive conditions. Marine finfish market information and aquaculture development trends in selected locations in Indonesia and Malaysia. Market analysis of the live reef food fish trade.

In this issue:

International shrimp farming principles welcomed by countries. Discussions on the establishment of a "Mahseer R&D Centre". Microsatellite DNA markers for mahseer are now available. First study on genetic variation of the critically endangered Mekong giant catfish. IMNV found in Asia-Pacific. Thailand and US to jointly install tsunami wave sensors. Co-management in aquaculture explored at APFIC Forum. Virus may control Australia's feral carp problem. A milestone in India's sustainable shrimp farming efforts. Fish introduction in India: Status, challenges and potentials. 8th Asian Fisheries Forum. STREAM Update. Website management training to support Thai Post-tsunami Rehabilitation website.

In this issue:

Resources and biodiversity of seahorses and their need for conservation in India. Captive breeding of pangasid catfish Pangasius pangasius. Establishment of post-tsunami rehabilitation information units in Thailand. Poor farmers culture tilapia intensively in ponds in Central Luzon, Philippines. Simple herbal treatment for treatment of EUS in snakehead. DNA vaccination in health management. The role of immunostimulants. Red tilapia cage culture in central Thailand. Quality improvement of farmed fish in Iranian markets.

In this issue:

MPEDA-NACA sustainable shrimp village demonstration programme. Inter-calibration of white spot syndrome virus (WSSV) PCR laboratories in India. Shrimp health management training. Rotary International/NACA meeting facility up at Koh Yao Noi. Tsunami-affected farmers train in marine cage aquaculture. Marine finfish aquaculture network at the APAN meeting in Singapore. Aquatic animal health policy workshops build consensus in ASEAN nations. Aquaculture Compendium released. Developments in establishing a conservation plan for the Mekong giant catfish. ROUNDTABLE: Exploring south-south cooperation opportunities in sustainable shrimp farming in West Africa, Conakry (Guinea). Technical missions to Cambodia and Lao PDR.

This manual provides guidelines for attaining better practices in culture-based fisheries, an emerging practice in rural areas in the Asian region. It deals with the principles of culture-based fishery practices, primarily based on relatively long-term experiences in Sri Lanka and Vietnam. It deals with the gross factors that are applicable to improving fish yields and therefore revenue; and sustaining culture based fisheries as a development activity in the long-term.

In this issue:

High-health postlarvae a prerequisite for sustainability of the Indian shrimp industry. Broodstock and all-female scampi grow out ponds in south India. Genetically modified fish and potential applications. Rainbow trout farming in hill terraces of Nepal. Sugar industry by-products as plankton boosters and yield enhancers in carp culture. Growth and production of Penaeus monodon in low saline culture systems. Poor households raise prawns for export. Marine fish marketing in Bangladesh.

‘Spawn’ is the name for the young fish about three days old that are available from hatcheries. Sometimes these young fish are also called hatchlings. The spawn of catla, rohu and mrigal is about 6-8 mm long. At this stage, the ‘yolk sac’ is absorbed, the mouth opened and the fins fully developed. Spawn are reared intensively, first to the ‘fry’ size and then to the ‘fingerling’ size. All the three stages are marketed and collectively called ‘seed’.

The “fast fingerling system” can produce advanced fingerlings about two months earlier than they are normally available from fish farms.  The farmer uses just one pond for continuous growing until fingerling size is reached, and fewer fish are stocked. A farmer with a small, seasonal pond can produce fingerlings in one month. These can then be sold for a high price because everyone wants fingerlings as early as possible.

The fingerling rearing pond, like the nursery pond, should be free from weeds and predators. Submerged weeds and predators are killed by mahua oilcake, which then acts as a good fertiliser. If there are no weeds, to kill predators and competitors quickly you can just add 100 kg of urea followed 24 hours later by 200 kg of fresh bleaching powder for a 1-ha area of a 1-m deep pond.

In watersheds, medium irrigation projects can be useful for aquaculture even though these water bodies are many times larger than ponds, and are basically built for irrigation or water storage. However, the full potential of these water bodies is not yet realised. Net pens or cages can be used to rear fingerlings in such environments.