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Fukuyo, Yasuwo
Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)
Earth & Planetary Sciences

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OCCURRENCE OF Gymnodinium catenatum IN THE GULF OF THAILAND Lirdwitayaprasit, Thaithaworn; Panuksubaksul, Darin; Takata, Yoshinobu; Sato, Shigeru; Kodama, Masaaki; Fukuyo, Yasuwo
Marine Research in Indonesia Vol 33, No 1 (2008)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3034.522 KB) | DOI: 10.14203/mri.v33i1.510

Abstract

A clonal culture of Gymnodinium catenatum was established from a plankton sample collected from Leamthan, Chonburi Province, in the Upper Gulf of Thailand. The culture was maintained at 28±1°C under light intensity of 70 [tmol photons m-2 s-1 with 12:12 L:D cycle. Cells were harvested at late exponential phase and extracted with 0.03 M acetic acid. The HPLC analysis on thus obtained extract revealed that toxins consist of N-sulfocarbamoyl toxins, Cl and C2, as major components. GTX1, GTX2, GTX3, GTX4 and dcSTX were also detected as minor components. The toxin profile of this clone is different from clones of G. catenatum found in Singapore which was dominated by the highly potent carbamate toxins, primarily GTX 1 and 4 with less amounts of GTX2, GTX3, neosaxitoxin, and saxitoxin. No N-sulfocarbamoyl, decarbaomyl, or deoxy-decarbamoyl toxins were detected.
MORPHOLOGY OF A NEW HETEROCAPSA SPECIES (PERIDINIALES, DINOPHYCEAE) OCCURED IN HUE, VIETNAM Iwataki, Mitsunori; Kawami, Hisae; Nguyen, Nguyen van; Doc, Luong Quang; Phap, Ton That; Fukuyo, Yasuwo; Matsuoka, Kazumi
Marine Research in Indonesia Vol 32, No 2 (2007)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8529.232 KB) | DOI: 10.14203/mri.v32i2.448

Abstract

To investigate the distribution of Heterocapsa including a harmful species H. circularisquama, cells were surveyed in three Vietnamese coasts, Ha Long Bay, Hue and Phu Quoc Island in 2006. Cells of Heterocapsa were detected from Lang Co Lagoon and adjacent coast in Hue. Cell of the species possesses thecal plates corresponding to the typical of Heterocapsa. Under TEM, body scales approximately 500 nm in diameter are observed. The scale structure is similar to that of H. illdefina, however, number of the marginal spine is different. We concluded it is an undescribed Heterocapsa species possessing a new body scale ultrastructure.
Co-Authors Doc, Luong Quang Iwataki, Mitsunori Kawami, Hisae Kodama, Masaaki Lirdwitayaprasit, Thaithaworn Matsuoka, Kazumi Nguyen, Nguyen van Panuksubaksul, Darin Phap, Ton That Sato, Shigeru Takata, Yoshinobu