Novel exotoxic principle(s) produced by the toxic dinoflagellate Alexandrium minutum : effects on brine shrimp (Artemia salina) and larval fish (Rhombosolea taparina) ...

• Main Author: Lush, GJ
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Faroe Islands
• Online Access: https://dx.doi.org/10.25959/23228336.v1; https://figshare.utas.edu.au/articles/thesis/Novel_exotoxic_principle_s_produced_by_the_toxic_dinoflagellate_Alexandrium_minutum_effects_on_brine_shrimp_Artemia_salina_and_larval_fish_Rhombosolea_taparina_/23228336/1

A number of species of the dinoflagellate genus Alexandrium have been implicated in the production of Paralytic Shellfish Poisoning (PSP) toxins but occasionally have also been associated with the mortality of both cage-reared and wild raffish in such places as the Faroe Islands (A. tamarense) (Mortensen 1985), Taiwan (A. minutum) (Su et al. 1993) and Egypt (A. minutum) (Halim 1996). In the present work exocellular toxicity was investigated in two species of Australian dinoflagellates, A. minutum and Gymnodinium catenation. Both are known producers of neurotoxic PSP toxins, but these toxins are only known to exist endocellularly. Investigations took the form of animal based biological assays using the brine shrimp, Artemia sauna, and juvenile greenback flounder, Rhombosolea taparina, which were exposed to whole cell and cell-free cultures of the algae. Bioassays determined the time to mortality for both species, while pathological changes in major tissues and changes in physiochemical characteristics of the ...