Temporal and spatial analysis of benomyl/carbendazim in water and its possible impact on Nile tilapia (Oreochromis niloticus) from Tenango dam, Puebla, Mexico.

Activities like agriculture contribute to the pollution of aquatic systems by fungicides, such as benomyl/carbendazim. This chemical inhibits the activity of acetylcholinesterase (AChE), having teratogenic, oncogenic, reproductive, and hepatic effects on aquatic and soil organisms. This paper presents the results of a study conducted in the Tenango dam, Mexico, aimed at detecting and determining the spatial and temporal variability of benomyl/carbendazim fungicide in the dam's water and its possible impact on Nile tilapia (Oreochromis niloticus), farmed and commercialized in the site.

Persistent organic pollutants in Kemp's Ridley sea turtle Lepidochelys kempii in Playa Rancho Nuevo Sanctuary, Tamaulipas, Mexico.

Persistent organic pollutants (POP) are toxic substances for wildlife and people. The Kemp's Ridley sea turtle Lepidochelys kempii is an endangered species with limited distribution in the Gulf of Mexico (GM), a marine ecosystem that has been perturbed by a variety of anthropogenic activities. In this work, the concentrations of ten organochlorine pesticides (OP), eight polychlorinated biphenyls (PCB), and atrazine were determined in the plasma of Kemp's Ridley sea turtles that nest in Playa Rancho Nuevo Sanctuary, Tamaulipas, Mexico.

Heavy metal bioaccumulation in Oreochromis niloticus from Tenango Dam, Puebla, Mexico.

Oreochromis niloticus was used to determine the effects of heavy metals and their concentration in aquatic environments. Its wide distribution, resistance, and economical importance make it a suitable biomonitor. The present study was conducted in the Tenango Dam (Puebla, Mexico) to determine water quality and its impact on O.

Total mercury concentration in two marine fish species, mackerel (Scomberomorus sp.) and snapper (Lutjanus sp.), from several Mexican fishing ports.

Mercury and methylmercury concentrations were evaluated in two marine fish species captured and consumed in Mexico, snapper (Lutjanus sp.) and mackerel (Scomberomorus sp.), obtained from several fish ports on the Pacific Ocean and the Gulf of Mexico.

Photoinduced toxicity of the polycyclic aromatic hydrocarbon, fluoranthene, on the coral, Porites divaricata.

The synergistic effect of ultraviolet radiation (UVR) and a polycyclic aromatic hydrocarbon (PAH) was tested on the coral Porites divaricata. Small branches were incubated in different concentrations of fluoranthene followed by exposure to ecologically relevant levels of natural solar radiation, with and without UVR. Exposure to the highest concentration of fluoranthene (60 microg L(- 1)) resulted in decreased photochemical efficiency of corals exposed concomitantly to UVR but not in corals exposed to 60 microg L(- 1) fluoranthene without UVR.

Environmental legislation and aquatic ecotoxicology in Mexico: past, present and future scenarios.

The consolidation of environmental legislation is fundamental for governments that wish to support and promote different actions focused on reducing pollution and protecting natural water resources in order to maintain the present and future benefits that water provides for human beings and wild life. Environmental laws are essential for sustaining human activities and health, preserving biodiversity and promoting sustainable development. In this context, it is important that environmental regulations concentrate on preventing or reducing the harmful impact of pollutants on organisms and ecosystems.