The ingestion rates of the heterotrophic protist Polykrikos kofoidii feeding on three different species of Alexandrium were determined by means of incubation experiments in well-plates. In this experiment P. kofoidii was subjected to prey mixtures consisting of A. pseudogonyaulax (strain L4-B9) and A. catenella (strain Alex 5) or A. limii (strain Atay99Shio-02), whereby one prey was dyed with the fluorescent dye CMAC. The dye had no influence on the feeding behaviour of P. kofoidii and thus dye combinations of the same prey mixtures were combined. This dataset contains all data collected within this experiment including cell counts and ingested prey cells of P. kofoidii. The experiments were carried out on January 18, 2023 in the laboratories at the Alfred-Wegener-Institute in Bremerhaven, Germany.
The cryptophyte Rhodomonas salina was subjected to various concentrations of supernatants of Alexandrium (A. pseudogonyaulax, A. monilatum) for 3 or 24 h. Then, the percentage of intact R. salina cells was quantified microscopically. This dataset comprises all cell counts from the R. salina bioassays used to construct dose-response curves. The experiments were carried out between November 9, 2023 and March 26, 2024 in the laboratories at the Alfred-Wegener-Institute in Bremerhaven, Germany.
The ingestion rates of the heterotrophic protist Polykrikos kofoidii feeding on different species of Alexandrium were determined by means of incubation experiments in well-plates. In the first experiment P. kofoidii was subjected to monoalgal prey consisting of either lytic goniodomin producing A. pseudogonyaulax (Limfjord, Denmark, strain L4-B9) or a non-lytic paralytic shellfish toxin producing Alexandrium catenella (Scottish east coast North Sea, strain Alex 5). In the second experiment P. kofoidii was subjected to prey mixtures consisting of A. pseudogonyaulax (strain L4-B9) and A. catenella (strain Alex 5) or goniodomin producing non-lytic A. limii (Shioya Bay, Japan, strain Atay99Shio-02), whereby one prey was dyed with the fluorescent dye CMAC. The experiments were carried out between December 2 and 5, 2022 and on January 18, 2023 in the laboratories at the Alfred-Wegener-Institute in Bremerhaven, Germany.