Thumbnail Image

Demersal Fish Investigations in The Gulf of Thailand 





Also available in:
No results found.

Related items

Showing items related by metadata.

  • Thumbnail Image
    Project
    Report of a bio-economic modelling workshop and a policy dialogue meeting on the Thai demersal fisheries in the Gulf of Thailand
    Hua Hin, Thailand, 31 May-9 June 2000
    2001
    Also available in:
    No results found.

    Similar to many marine fish stocks in Asia and elsewhere in the world, the demersal resources in the Gulf of Thailand have been subjected to excessive levels of fishing effort since perhaps as long as two to three decades. This has resulted in a change in catch composition with a higher share of short-lived species in the catch. The influence on the value of the catch is not unambiguously negative because several short-lived species including certain cephalopods and crustaceans fetch g ood prices in the market. In general, fish prices showed real increases over the last decade including so-called ‘trash-fish”, i.e. by-catches of small fishes that are converted into fishmeal. The rapid growth in feed-intensive livestock and shrimp culture production has resulted in a rapidly growing fishmeal market. However, there is certainly concern about the impact on the Gulf of Thailand ecosystem and on bio-diversity of a continuation of the very high levels of mostly indiscrim inate fishing effort, especially bottom trawling. While the immediate effect of a reduction of fishing effort could cause a decline in the quantity and value of the catch, the long-term benefit is likely to be very large. This is indicated by the findings of all three types of modelling approaches applied during this workshop, namely surplus production model (Gordon-Schaefer and Gordon-Fox), age-structured Thompson & Bell model (BEAM 5) and mass-balance eco-system model (ECOPATH).
  • Thumbnail Image
    Document
    Assessment of stocks of demersal fish off the west coasts of Thailand and Malaysia 1971
    Also available in:
    No results found.

    The increase in Thailand's population and the insufficiency of trawl catch in the traditional fisheries in the Gulf of Thailand led to proposals to increase trawl fishing off the Thai and Malaysian Indian Ocean coasts. Thailand bought a vessel to undertake research on catch rates of good and of scrap fish, changes in abundance, distribution of fish at various depths, potential resources, and the relationship between catch and effort. Certain infrastructural lacunae have hitherto hampered the tra wl-fisheries development of Thailand's Indian Ocean coast: rail or road transport, boats, marketing, landing places, and ice or cold-storage facilities. The analysis of catch and the assessment of stock of demersal fish indicates that the level of sustained yield may already have been reached by 1968. If this is so, additional effort will not increase the yield and may actually decrease it and will certainly decrease the catch per effort and hence the profitability. Systematic surveys for catch and effort studies and research on the biology of commercially important demersal fish species should be intensified and carried out regularly to acquire the scientific basis for proper management of fish stocks in the future.
  • Thumbnail Image
    Document
    A Preliminary Study of Fish Egg Survey in The Gulf of Thailand  1962
    Also available in:
    No results found.

Users also downloaded

Showing related downloaded files

No results found.