Abstract Akashiwo sanguinea, a cosmopolitan red tide-forming dinoflagellate, is reported for the first time as a bloom from the Cochin estuary along the South Eastern Arabian Sea. Monthly sampling showed the continuous presence of A. sanguinea with occasional blooms. Blooms of A. sanguinea with the highest abundance of 2.8 × 105 cells l−1 were observed during the monsoon season (June 2019) with chlorophyll a of 17.2 mg m−3. The bloom period was characterized by higher concentrations of nitrate (26 μmol l−1) and phosphate (3.8 μmol l−1). Routine monitoring of the bloom region showed the survival of the Akashiwo sanguinea population in the temperature (26 to 30°C) and salinity (22 to 24 PSU) range indicating its eurythermal and euryhaline characteristics.

中文翻译：

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首次记录的来自科钦回水区的赤石藻（Dinophyceae）盛开，科钦回水区是阿拉伯海东南部的一个热带河口系统

摘要 Akashiwo sanguinea 是一种世界性的赤潮形成的甲藻，首次被报道为阿拉伯海东南部科钦河口的水华。每月采样显示 A. sanguinea 持续存在，偶尔开花。在季风季节（2019 年 6 月）观察到具有最高丰度的 A. sanguinea 2.8 × 105 个细胞 l-1 的花朵，叶绿素 a 为 17.2 mg m-3。开花期的特点是硝酸盐（26 μmol l-1）和磷酸盐（3.8 μmol l-1）浓度较高。对水华地区的常规监测表明，赤石窝血红藻种群在温度（26 至 30°C）和盐度（22 至 24 PSU）范围内存活，表明其具有广热和广盐特征。