Studies on harmful phytoplanktons in South East Asia

东南亚有害浮游植物的研究

• 批准号: 03041060
• 负责人: OKAICHI Tomotoshi
• 金额: $ 1.6万
• 依托单位: Kagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03041060/
• 关键词: Red Tide; Eutrophication; Pyrodinium bahamense; Paralytic Shellfish Poison; Masinloc Bay; Manila Bay

In 1989 the studies were developed to survey the distribution of Pyrodimium bahamense and toxic shellfish together with the chemical environmental research in Masinloc Bay, Zambales and the coastal water area of Remay, Bataan of Manila Bay.Surveys in Masinloc Bay were carried out at 4 stations on February 17-19, 1992. Salinities of the surface water were 33.6-35.4*. The water mass of slightly low salinity (33.6-34.6*) and high concentration of silicate (0.153-0.562 mg/l as SiO_2) were detected in middle and lower layer outside Bamban Bay where located at the southern part of Masinloc Bay. The concentration of suspended solid and total planktonic pigments were 1.2-4.7 mg/l and 1.1-5.7 mug/l respectively. Mass flux which was measured by using the sediment traps was 1.73 g/m^2/day at north-east region of Masinloc Bay. P. bahamense var. essum bloomed from April to June, 1991 and reached the maximum density of 189, 000 cells/l in May. The blooming, was terminated in early August, maybe, by … More the effect of the dense ash falls and changes in weather conditions of the area the eruption of Mt. Pinatubo. The bloom of the species started to recur again in December. In February when the Japanese team made a field survey, dense density of 21, 860 cells/l and 29, 220 cells/l were observed at 4m-depth inside and 10m-depth outside Bamban Bay, respectively. However. water discoloration was not prominent.The survey along the coast of Rimay, Bataan. Manila Bay was carried out on February 19-20. The salinities were 27.7-33.6 * in surface water and 23.03 * in bottom water. Silicate were in the high range of 0.38-0.72 mg/l as SiO_2. The concentrations of suspended solid and total planktonic pigments were 0.45-8.26mg/l and 1.0-9.5 mug/l respectively. Mass flux was 3.61 g/m^2/day. These values seemed to be derived from the eutrophication of the Bay. P. bahamense var. essum bloomed and appeared as red tide off Limay in June, 1991 and the cell density was counted as much as 7, 549, 000 cells/l. In February, 1992, the species appeared in quite low quantities, 80 cells/l off Limay, and 1, 360 cells/l off Orion.Cells of P. bahamense var. compressum were isolated and inoculated into enriched sea water medium Tl and then the most of them are still alive and under culture investigation. The analysis of Paralytic shellfish poison of the bivalves collected at Masinloc Bay is under progress.Totally four long cores were collected in Masinloc Bay and Manila Bay in order to clarify the succession of the dinoflagellate cyst assemblage since the last few decades.Cumulative results of the research will be printed and that should be expected as materials for the survey manual on red tide and shellfish poisoning in western pacific region. Less

1989年在马尼拉湾的赞巴莱和巴丹岛的雷迈沿岸水域开展了巴哈马热解壳（Pyrodimium bahamense）和有毒贝类分布调查及化学环境研究，并于1992年2月17-19日在马辛洛克湾的4个站位进行了调查。地表水盐度为33.6-35.4 *。在马辛洛克湾南部的班湾外的中、下层水体中，盐度略低（33.6-34.6 *），硅酸盐含量高（0.153-0.562 mg/l，以SiO_2计）。悬浮固体和总色素的浓度分别为1.2 - 4.7毫克/升和1.1 - 5.7微克/升。在马辛洛克湾东北部地区，使用沉积物收集器测得的质量通量为1.73 g/m^2/d。巴哈马山龙眼1991年4~6月，香根草开花，5月达到最大密度，为189，000个/l。开花，在八月初结束，也许， ...更多信息 火山灰的密集福尔斯和该地区天气条件的变化的影响，火山喷发。皮纳图博该物种的开花在12月又开始重现。今年2月，日本考察队进行实地考察时，在班班湾内4米深处和外10米深处分别观察到21860个细胞/升和29220个细胞/升的密集密度。然而.水变色并不突出。调查沿着巴丹岛里迈海岸。马尼拉湾于2月19日至20日进行。表层水盐度为27.7-33.6 *，底层水盐度为23.03 *。硅酸盐以SiO_2计在0.38 - 0.72 mg/l的高范围内。悬浮物和总色素的浓度分别为0.45 - 8.26毫克/升和1.0 - 9.5微克/升。质量通量为3.61 g/m^2/天。这些值似乎来自海湾的富营养化。巴哈马山龙眼1991年6月，在利迈附近海域出现赤潮，密度高达754.9万个/l。1992年2月，该种在利迈和猎户座海域出现的数量很低，分别为80个/l和1360个/l。将扁壳藻分离并接种到富集海水培养基TI中，然后大部分仍然存活并正在进行培养研究。马辛洛克湾双壳类麻痹性贝毒的分析正在进行中，为了阐明近几十年来甲藻孢囊组合的演替，在马辛洛克湾和马尼拉湾共采集了4个长柱状样，积累的研究结果将被打印出来，预计将作为西太平洋赤潮和贝毒调查手册的材料。少

项目成果

T. Okaichi, T. Ochi, S. Wissesang, T. Ishimaru, Y. Fukuyo, T. Urai: "Isolation and culture of Pedinomonas noctilcae, a symbiont of Noctilcae scintillans of Gulf of Thailand." Journal of Phycology. (1992)

T. Okaichi、T. Ochi、S. Wissesang、T. Ishimaru、Y. Fukuyo、T. Urai：“Pedinomonas noctilcae（泰国湾 Noctilcae scintillans 的共生体）的分离和培养。”