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Ver términos de la licenciaGarita-Alvarado, Carlos A., et al. (2024). Cyanotoxins bioaccumulation by fish in an anthropized reservoir in central Mexico. Revista Internacional de Contaminación Ambiental; Vol. 40, 2024; 215-230. Recuperado de https://repositorio.unam.mx/contenidos/4161071
Autor(es)
Garita-Alvarado, Carlos A.; Bermúdez-González, María Pamela; Bojorge-García, Miriam G.; Cantoral Uriza, Enrique A.
Tipo
Artículo de Investigación
Área del conocimiento
Biología y Química
Título
Cyanotoxins bioaccumulation by fish in an anthropized reservoir in central Mexico
Fecha
2024-11-21
Resumen
The bioaccumulation of cyanotoxins has been well documented in exposed organisms including fish, which represent a potential route to cyanotoxins transfer to humans by consumption of contaminated food. We determined the bioaccumulation of neurotoxic saxitoxins and hepatotoxic microcystins in muscle and liver/viscera of native (Goodea atripinnis), introduced (Poeciliopsis gracilis), and commercially important (Oreochromis niloticus) fish in Santa Catarina, an anthropized reservoir in Central Mexico. Additionally, we calculated the potential risk of human exposure due to the consumption of the studied species. The Santa Catarina Reservoir showed some physical and chemical water parameters generally associated with cyanobacterial blooms (e.g., high phycocyanin, chlorophyll-a, dissolved phosphorus concentrations, and alkaline pH) with presence of cyanotoxins produced by the cyanobacteria genera Microcystis, Dolichospermum, and Planktothrix, which were found in dissolved and particulate (sestonic) fractions of water. Moreover, we detected the presence of saxitoxins and microcystins in the tissues of all species studied. The risk of intoxication for humans was lower for the consumption of Nile tilapia muscle than for the other analyzed species, whose consumption should be avoided since it exceeds the recommended daily intake of microcystins for a short-term (i.e., two-week exposure time). These findings are remarkable because commercial fishing in reservoirs and the consumption of these fish could represent a route to human exposure to toxins, particularly microcystins. Our results highlight the need for the detection of cyanotoxins and the evaluation of their bioaccumulation by fish in unstudied eutrophic waterbodies, to reduce the potential health risk for humans and the environment.
Tema
cyanobacteria; ELISA; introduced species; microcystins; Nile tilapia; saxitoxins; cyanobacteria; ELISA; introduced species; microcystins; Nile tilapia; saxitoxins
Idioma
spa
ISSN
ISSN impreso: 0188-4999
