of Ban Don Bay and Phangnga Bay, Thailand - WorldFish Center

More documents

Recommendations

Info

Biology Marine Environment MANUWADI HUNGSPREUGS AND PRAWIN LIMPSAICHOL The distribution of plankton and benthic communities in the Gulf of Thailand was studied by the Marine Fisheries Laboratory and Exploratory Unit of DOF. Most of the studies on zooplankton concentrated on fish larvae and fish eggs. None were done in the nearshore zone of Ban Don Bay; the closest were done at Ang Thong Island, Surat Thani. Vibrio spp., coliform bacteria like Escherichia colidistribution in water, sediment and some marine organisms were studied in many coastal areas in the gulf (Saitanu et al. 1984a; 1984b). Total bacterial counts were 440 to 893,300 per ml of water samples and 3,000 to 58,500,000 per g of mollusk. Most Probable Numbers (MPN) of of coliform and fecal coliform bacilli were 0 to 1,600 per 100 ml of water and 0 to 100 g of mollusk. Vibrio parahaemolyticus was found in 85% of mollusk samples and 56% of water samples. Based on the above findings, it can be inferred that culture areas in the Upper Gulf of Thailand, oyster farms in Surat Thani, cockle farms in Nakhon Si Thammarat and some cockle farms in Phangnga were contaminated with fecal wastes. Zooplankton community structure, abundance and distribution on the east coast of Phuket Island and Phangnga Bay (Fig. 2.3) were analyzed by Boonruang (1 985) who reported Fig. 2.3. Sampling ?rations and depth contours in Plianrjnya Bay.
the highest density during the northeast monsoon with a maximum abundance occurring in the uppermost part of Phangnga Bay. In a related study by Boonruang and Tongvichit (unpublished) on the abundance and composition of zooplankton in Phangnga Bay for the entire 1984, monthly variations were observed. Abundant zooplankton population occurred during January to March with copepods having the highest species composition (20-60% followed by Lucifer spp. (1 -50%). Shrimp larvae were also observed constituting 1-5% at the inner part of the bay. A preliminary study on fish larvae abundance and composition was also undertaken from January to June 1984 by Janekarn and Nateewathana (unpublished). About 41 families were recorded with 21 of economic importance constituting 57.5% of the collected materials. Among the families were Engraulidae, Leiognathidae, Carangidae and Sciaenidae which was the most abundant. Seasonal variations were observed to be greatly affected by the monsoon periods. However, long-term observations are required to establish trends. The primary productivity was measured in situ along the east coast of Phuket Island and Phangnga Bay in I982 (Fig. 2.3) using carbon-1 4 technique. It was reported that low and high primary productivity was recorded during northeast and southwest monsoons, respectively (Sunstrom et al. 1986). Chemical and physical oceanography I I 0 0 48 49 0 0 52 53 0 66 0 60 Gulf of O Thailond 64 Fig. 2.4. Sampling stations fol- DOF near Ban Don Bay: statlons 81.82 and 83 in 1985. Along with the DOF biological surveys, limited studies on chemical parameters such as DO, pH and nutrients were conducted. The closest sampling stations to Ban Don Bay were 81, 82 and 83 (Fig. 2.4). Stations 87 and 88 could not be sampled because they were too shallow 0 68 0 74
Page 2 and 3: i , Thcoastal Environmental Profile
Page 4 and 5: m I0 B Contents List of Figures ...
Page 6 and 7: List of Tables Geology of the Upper
Page 8 and 9: List of Figures The Upper South Reg
Page 10 and 11: Acknowledgements The following are
Page 12 and 13: Forewords The coastal zone of Thail
Page 14 and 15: Providing technical solutions to co
Page 16 and 17: the bay's hydrological and water qu
Page 18 and 19: Swat Thani h- Nokhon Si Thammarat \
Page 20 and 21: Table 1.1. Geology of the Upper Sou
Page 22 and 23: mostly composed of mud, sand, silt
Page 24: development. Water resources are av
Page 27 and 28: Table 2.1. Hydrological characteris
Page 29: and other planned damlreservoir pro
Page 33 and 34: The only other report available on
Page 35 and 36: oxidized layers. The lower part of
Page 37 and 38: About 56% of the total area of the
Page 39 and 40: and where the soil surface is water
Page 41 and 42: Table 2.14. Average volume (m3/ha)
Page 43 and 44: Mangroves Even though the importanc
Page 45 and 46: Khiri Rotthonlkhorn Mu KO Ang Thong
Page 47 and 48: March and May. It was concluded tha
Page 49 and 50: Table 3.7. Shrimp production (t) in
Page 51 and 52: Oysters, short-necked clam and muss
Page 53 and 54: Chapter 4 Tourism: Resource and Eco
Page 55 and 56: 1987. Water supply is a severe limi
Page 57 and 58: *.+ Actual JICA forecoat (19051 4--
Page 59 and 60: in the city were 62% in December an
Page 61 and 62: Chapter 5 Other Economic Sectors SU
Page 63 and 64: Development should be geared to hyb
Page 65 and 66: Chapter 6 Population WINAI WEERAWAT
Page 67 and 68: Most migrants in Surat Thani and in
Page 69 and 70: Table 6.5. Population density in Ph
Page 71 and 72: espectively, of the households in t
Page 73 and 74: Most occupations were agricultural
Page 75 and 76: Table 7.1. List of institutions and
Page 77 and 78: management of fisheries resources.
Page 79 and 80: policy and plans to ONEB; supervisi
Page 81 and 82:
1. This zone includes important eco
Page 83 and 84:
Table 8.1. Continued Low Public awa
Page 85 and 86:
Table 8,l. Continued Phangnga Bay C
Page 87 and 88:
Parsons, T.R., M. Takahashi and B.
show all

of Ban Don Bay and Phangnga Bay, Thailand - WorldFish Center

Create successful ePaper yourself

Delete template?

Save as template?