We are pleased to share our latest article published in Harmful Algae:
“Gambierdiscus polynesiensis from New Caledonia (South West Pacific Ocean): Morpho-molecular characterization, toxin profile and response to light intensity”
This work, contributed to by Thierry Jauffrais and Manoella Sibat, two researchers within the MaHeWa project for WP2 (Biological Impacts and Ecological Vulnerability), focuses on Gambierdiscus polynesiensis. This dinoflagellate is known for producing neurotoxins associated with ciguatera. In New Caledonia, located in the southwest Pacific Ocean, there is currently a significant knowledge gap regarding ciguatera and the microalgae linked to this foodborne illness. This study describes a new strain of Gambierdiscus polynesiensis outside the Polynesian archipelago—a first—along with its toxin diversity and response to varying light intensities.
This work aligns with the objectives of WP2, a program led by G. Mitta (Ifremer, French Polynesia). The research group investigates the impacts of marine heatwaves on coral reef ecosystems and biosecurity, particularly through ciguatera. The study’s findings enhance understanding of how environmental conditions influence microalgal toxicity, providing insights for anticipating and managing public health risks.
This discovery marks a significant milestone for New Caledonia, where ciguatera poses a major challenge. By elucidating the behavior of Gambierdiscus polynesiensis, scientists are laying the groundwork for improved prevention, essential for protecting populations and preserving marine ecosystems.
You can access it here:
This work was also recently presented at the “International Symposium on Ciguatera Poisoning in the Pacific Islands,” held from May 19 to 22, 2025, in Nelson, New Zealand.
