Spatial and temporal variations of microcystins in hepatopancreas of a freshwater snail from Lake Taihu

Health risks associated with consumption of microcystin-contaminated fish and shellfish in three Chinese lakes: Significance for freshwater aquacultures

“…Similar phenomenon was found in fish from Lake Chaohu, Dianchi and other freshwater lakes in China (some data not shown here). Previous studies have shown toxin accumulation can differ by species Song et al, 2007;Zhang et al, 2009). It was also suggested by Li and his colleague that due to the high GSH level in the liver, silver carp has high tolerance to the MCs exposure .…”

“…A previous study found that the toxin accumulations (EDI values) in the muscle of crucian carp and common carp varied from below detection limit to 82% of TDI values, and 0.93-3.55 times of TDI values, respectively (Zhang et al, 2009), which prompted them to suggest that consumption of fish harvested from Lake Taihu seemed safe during 2005. However, another study conducted in the same year on the same lake found MCs accumulations in the edible organs of aquatic products seemed to be unsafe for consumption due to the high concentration of toxin accumulations (Song et al, 2007).…”

“…However, in the same sampling months, the concentrations of toxic Microcystis cells in the water column of Lake Dianchi was significantly higher than that in other two lakes (data not shown). It has been proposed by Zhang et al (2009) that the accumulation of toxins in the snails was not only affected by the concentration of toxic Microcystis cells (particulate toxins), but also the dissolved toxins and other physical-chemical factors of the lake water. As Lake Dianchi is located in Yungui plateau, strong UV irradiation may lead to the low concentration of dissolved MCs in this lake (Zhang et al, 2001;Sakai et al, 2007).…”

“…The consumption of freshwater items, such as fish, shrimps, clams, crabs, snails and so on, are very popular in China. However, most past studies regarding toxin accumulations in aquatic vertebrates and invertebrates were of toxicological concern with the main objectives of determining the target organ in aquatic organisms (Watanabe et al, 1992;Carbis et al, 1997;Chen and Xie, 2005;Deblois et al, 2008;Zhang et al, 2009).…”

Bioaccumulation of microcystins in two freshwater gastropods from a cyanobacteria-bloom plateau lake, Lake Dianchi

“…These studies of B. aeruginosa showed that concentrations of MCs in the hepatopancereas were not only significantly higher than those in digestive tracts, but also showed positive correlations with each other Zhang et al, 2007Zhang et al, , 2009.…”