info:eu-repo/semantics/article
Harmful phytoplankton in the Beagle Channel (South America) as a potential threat to aquaculture activities
Fecha
2019-08Registro en:
Almandoz, Gaston Osvaldo; Cefarelli, Adrián Oscar; Diodato, Soledad Lorena; Montoya, Nora Gladys; Benavides, Hugo R.; et al.; Harmful phytoplankton in the Beagle Channel (South America) as a potential threat to aquaculture activities; Pergamon-Elsevier Science Ltd; Marine Pollution Bulletin; 145; 8-2019; 105-117
0025-326X
CONICET Digital
CONICET
Autor
Almandoz, Gaston Osvaldo
Cefarelli, Adrián Oscar
Diodato, Soledad Lorena
Montoya, Nora Gladys
Benavides, Hugo R.
Carignan, Mario Osvaldo
Hernando, Marcelo Pablo
Fabro Cerreia Fus, Elena Ines
Metfies, Katja
Lundholm, Nina
Schloss, Irene Ruth
Álvarez, Marcela
Ferrario, Martha Elba
Resumen
The Beagle Channel is a remote subantarctic environment where mussel aquaculture initiatives have existedsince the early 1990s. Here we analyze phytoplankton biomass and composition, and the occurrence of harmfulmicroalgae species and their toxins at three sites during the period 2015?2016. The occurrence of potentiallyharmful algae was observed throughout the study period, including toxigenic dinoflagellates such asAlexandrium catenella (Group I of the A. tamarense complex), A. ostenfeldii, Dinophysis acuminata, Gonyaulaxspinifera, Azadinium sp., and the diatoms Pseudo-nitzschia australis and P. fraudulenta. Toxic dinoflagellates weredetected in low densities whereas a Pseudo-nitzschia bloom was observed in late February. Isolates of A. catenellaand P. delicatissima sensu stricto were phylogenetically characterized. The toxin profile of A. catenella wasdominated by GTX4, while P. delicatissima sensu stricto showed no production of the neurotoxin domoic acid inculture conditions. The results provide base-line information for the management of harmful algal blooms in thislittle explored subantarctic area.