Studies on cysts: Possible clues of red tide phenomena along the eastern coast of Thailand
1998
Somthawin Charitkhuan, Burapha Univ., Chon Buri (Thailand). Faculty of Science. Dept. of Aquatic Science
Sediment sampling covered Bangpakong River Mouth to Sriracha and Sichang island from August 1995 - August 1996. The top 2 cm of non destroyed structure sediment by special corer was divided into two part. One was sonicated and sieved with stainless steel sieve and let filtered sample to study type and shape with high resolution microscope. The other was incubated in test tube by filter seawater (from the sampling site) incubated for 1 day and check the seawater above under high resolution microscope. The new filter seawater was changed daily and continuous monitoring for 5 days. The result was that Phaeopolykrikos sp. cyst cyst with round shape covered with tiny spine was the most frequency and abundant. The appearance of dinoflagellate cysts were dominant in Bangpakong River Mouth, especially in January 1996 or winter season. And the frequency of dinoflagellate cyst was only 6.6-40.0 percent of total samples. In this studied the cultured method was better than the sieving method.
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