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## Abstract Toxic cyanobacterial blooms are an increasing problem in Argentina. The production of cyanobacterial hepatotoxins (microcystins) and their presence in drinking and recreational waters represent a growing danger to human and animal health. Risk management deals with the probability that a certain exposure to toxins will lead to specific health outcomes. Various model schemes for risk management have been portrayed, most of which have some common elements. These include the need for an information base on which to make decisions. Thus, seasonal variability in the concentrations of total microcystins and cyanobacterial cells was studied in two reservoirs: San Roque and Paso de las Piedras. Both reservoirs are eutrophic water bodies and mainly used to supply drinking water and for recreation. Because San Roque is an important recreational spot, the spatial distribution of microcystins was also investigated. Sampling of the San Roque Reservoir occurred from 1998 to 2000 and of the Paso de las Piedras Reservoir from June to December 2002 (late autumn, winter, and spring). Microcystins were identified by LC‐MS, and their concentrations were measured using the enzyme‐linked imm

Author

Ana Laura Ruibal Conti; José María Guerrero; Jose María Regueira

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1520-4081)

Published

2005

Language

EN