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Gárate-Lizárraga, I., R., González-Armas, G., Verdugo-Díaz, Y., Okolodkov, B., Pérez-Cruz & J.A., Díaz-Ortiz (2019). Seasonality of the dinoflagellate Amphidinium cf. carterae (Dinophyceae: Amphidiniales) in Bahía de la Paz, Gulf of California. Marine Pollution Bulletin. 146: 532-541. DOI: 10.1016/j.marpolbul.2019.06.073.

Seasonality of the dinoflagellate Amphidinium cf. carterae (Dinophyceae: Amphidiniales) in Bahía de la Paz, Gulf of California

Ismael Gárate-Lizárraga, Rogelio González-Armas, Gerardo Verdugo-Díaz, Yuri Okolodkov, Beatriz Pérez-Cruz y Jesús Antonio Díaz-Ortiz

 Monthly phytoplankton samples were collected from January 2013 to December 2015 at a fixed sampling site in Bahía de La Paz, Gulf of California. During this study 26 samplings were Amphidinium cf. carterae positive. The highest densities of A. cf. carterae (754.2×103 to 1022.4×103 cells L-1) were recorded during a bloom detected in January 2015 when water temperatures were 20–22 °C. This dinoflagellate showed a well-marked seasonal variation, being found mainly from November to April. Blooms of the species were linked to the upwelled water due to the northwesterly wind. Cysts surrounded by a mucilaginous membrane of A. cf. carterae were found. We also observed these hyaline cysts inside zooplankton fecal pellets. Other benthic/tychoplanktonic dinoflagellates and diatoms, including some potentially toxic species were also found. The occurrence of blooms of A. cf. carterae in Bahía de La Paz could represent a risk for aquaculture activities and human health.

Palabras clave: Amphidinium carterae, Bloom, Hyaline cysts, Ichthy; Zooplankton, fecal pellets

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