Accumulation and depuration of microcystins (cyanobacteria hepatotoxins) in Tilapia rendalli (Cichlidae) under laboratory conditions

Effect of dietary cyanobacteria on growth and accumulation of microcystins in Nile tilapia (Oreochromis niloticus)

“…The results were in agreement with the previous studies (Bury et al, 1998;Soares et al, 2004;Zhao et al, 2005).…”

“…On the other hand, filtering-feeding fishes such as silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis) are used to intake and control these blooming algae (Xie, 2003). However, there is few research about the accumulation of microcystins in fish (Soares et al, 2004) and there are no reports on the relationship between body accumulation and dietary intake of microcystins. Data is not enough to provide the evidence or the prediction of the food safety for those fishes from cyanobacteria blooming waters.…”

“…Water blooms of toxic cyanobacteria in fresh water bodies have been reported all over the world (Bouvy et al, 2000;Magalhães et al, 2001;Haider et al, 2003;Soares et al, 2004;Dionisio Pires et al, 2004) and it is often dominated by Microcystis aeruginosa (Orr et al, 2001;Park et al, 2001). M. aeruginosa and some other freshwater cyanobacteria often produce hepatotoxic cyclic heptapeptides microcystins (Kaya, 1996).…”

“…Microcystins can be accumulated in the tissues of fish (Tencalla et al, 1994;Soares et al, 2004), mussels (Amorim and Vasconcelos, 1999;Vasconcelos, 1995;Williams et al, 1997b;Dionisio Pires et al, 2004) and aquatic macrophytes (Pflugmacher et al, 1998) and also transferred from crab larva to salmons through food chain (Williams et al, 1997a). Many fishes are not able to avoid the ingestion of these toxic organisms through food in the waters such as small eutrophicated lakes and aquaculture ponds (Tencalla and Dietrich, 1997;Magalhães et al, 2001).…”

Effects of microcystin-LR, linear alkylbenzene sulfonate and their mixture on lettuce (Lactuca sativa L.) seeds and seedlings

“…So far, more than 80 analogues of MCs have been discovered, among which microcystin-LR (MCLR) is the most abundant and also the most toxic (Hoeger et al 2005). MCs can be accumulated not only in the tissues of animals (Soares et al 2004;Pires et al 2004), but also in terrestrial and aquatic plants (Pflugmacher et al 1998a;Chen et al 2004;Saqrane et al 2007), and can therefore pose a potential risk to human health through the food web. Generally, concentrations of dissolved MCs in natural water range from tens of ng to several lg per liter (Bogialli et al 2006;Song et al 2007) because they are mainly retained within healthy cyanobacterial cells, but high concentration (lg ml -1 ) of MCs in the environment can occur when massive numbers of toxic cyanobacterial cells collapse and decay.…”