Status of demersal fishery resources in the Gulf of Thailand

Data from trawl surveys (1961 - 95) and annual production statistics (1971 - 95) were used to examine the status of demersal fishery resources in the Gulf of Thailand. Analyses were focused on biomass trends, population parameters and exploitation rates of dominant species, and assessment of excess capacity from fishing effort and yield estimates. The results indicate by 1995, the trawlable biomass in the Gulf had declined to only about 8.2% of the biomass level in 1961.

Population dynamics of Saurida elongata and S. undosquamis (Synodontidae) in the southern Gulf of Thailand

Length-frequency data on Saurida elongata and S. undosquamis (Synodontidae) from bottom trawl survey conducted in 1984 in the Southern Gulf of Thailand were analyzed using the Compleat ELEFAN software. The seasonal pattern of recruitment suggests two uneven pulses per year, one stronger than the other. Yield-per-recruit analyses suggested that the investigated stocks are presently overexploited. Possible sources of bias for the analyses presented here are discussed.

Overview of sea cucumber aquaculture and sea-ranching research in the South-East Asian region

South-East Asia has traditionally been the global centre of production of tropical sea cucumbers for Chinese markets. Early research into culture methods took place outside this region, notably in India, the Pacific region and China. However, recent investment in Holothuria scabra (sandfish) culture has led to some significant advances within this region. The Philippines and Vietnam have been at the forefront of recent efforts, with involvement from substantial national programs and local institutions as well as international donors and scientific organisations.

Preliminary analysis of demersal fish assemblages in coastal waters of the Gulf of Thailand

The 1995 trawl data of the research vessels Pramong 2 and 9 in the Gulf of Thailand were analyzed using TWINSPAN and DCA. Four main station clusters were identified related to geographic location and depth. Two clusters are associated with shallow water areas and the other two clusters are found in deeper areas with water depths > 30 m. Temporal analysis indicates clustering of monthly data into wet and dry seasons. Examination of species abundance data indicates that the seasonality may not be very pronounced.

Observations on freshwater aquaculture and extension in Malaysia, Thailand, Japan and Taiwan

As part of the Philippines' plan to accelerate the country's rate of aquaculture development, a study team was sent to neighboring Southeast Asian countries to observe advances for improving and developing aquaculture in the Philippines. The 3-man team, of which the author was a member, toured Malaysia, Thailand, Japan, and Taiwan. This article is a brief account of observations from the trip and interviews with authorities from selected fisheries agencies, with emphasis on freshwater aquaculture.

Brackishwater fisheries research in Thailand

The work carried out by some of the brackishwater research stations in Thailand is described. The activities of these stations have 2 outstanding features: 1) the crustacean and finfish species are broadly similar for most areas (shrimp, Penaeus monodon and P. merguiensis , and seabass and grouper being the most important); 2) while it may appear that the programmes of the stations are similar on the species of common importance, this is inevitable inprogrammes oriented towards local extension work.

Review of environmental impact assessment and monitoring in aquaculture in Asia-Pacific

This review is prepared as part of the FAO Project “Environmental Impact Assessment (EIA) and monitoring in aquaculture”. The review provides a compilation, review and synthesis of existing EIA and environmental monitoring procedures and practices in aquaculture in the Asia-Pacific region, the largest aquaculture-producing region in the world. This review, as in other regions, gives special consideration to four areas related to EIA and monitoring in aquaculture including: (1) the requirements (2) the practice (3) the effectiveness and (4) suggestions for improvements.

Performance and nature of genetically improved carp strains in Asian countries

The WorldFish Center and its research partners have recently made efforts to develop genetically improved carp strains. This paper analyses the comparative performance of the genetically improved carp strains on both average and efficient farms in four carp-dominating Asian countries (Bangladesh, India, Thailand and Vietnam). The results show superior performance of improved strains in terms of body weight and survival rate on both average and efficient farms. On an average farm, the improved carp strain gives 15% higher body weight at harvest in India to 36% higher in Bangladesh.

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