![]() ![]() This neurotoxin has caused mortality in many marine mammal species, including both pinnipeds and cetaceans (Gulland 1999 Lefebvre et al. As this neurotoxin affects top predators, DA poisoning poses a risk to the safety and health of humans and wildlife. Photo: Mariano Sironi / Instituto de Conservacion de Ballenas de Argentina.ĭuring HABs, DA is transferred to higher organisms through the pelagic food web and is accumulated by intermediate vectors, such as copepods, euphausiids (i.e., krill), shellfish, and fish. australis) mother and calf swimming at the gulfs of Peninsula Valdes, Argentina, during a phytoplankton bloom. Species of marine diatom within the genus Pseudo-nitzschia and Nitzschia can form HABs when they produce domoic acid (DA), a potent neurotoxin responsible for amnesic shellfish poisoning (D’Agostino et al., 2018, 2017). HABs are characterized by the rapid growth of toxin-producing species of algae that can be harmful to people, animals, and the local ecology, even causing death in severe cases. Rises in ocean temperatures can lead to multiple alterations in marine ecosystems, including the increase and the frequency of Harmful Algal Blooms (HABs). Alejandro Fernández Ajó, OSU Department of Fisheries, Wildlife, & Conservation Sciences, Geospatial Ecology of Marine Megafauna Lab Gray Whale Individual Behavior and Body Conditionĭr. ![]()
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