“…LELONG et al (2012) reported 37 Pseudo-nitzschia species, of which, 14 were toxic. To date, this genus com-prises 60 described species, among which, 26 are confirmed toxic (BATES et al, 2018;HUANG et al, 2019;LUNDHOLM, 2019). Laboratory studies have shown that toxin production by Pseudo-nitzschia species is complex because species toxicity is influenced by abiotic (silicates or phosphates limitation, inorganic or organic nitrogen forms, temperature, salinity, irradiance) and biotic (bacteria, zooplankton) factors, as well as interactions between two or more factors (reviewed in LELONG et al, 2012;TRAINER et al, 2012;BATES et al, 2018).…”