La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Microcystin concentrations in Nile tilapia (Oreochromis niloticus) caught from Murchison Bay, Lake Victoria and Lake Mburo: Uganda (2010)
Auteurs :	Ronald Semyalo, Auteur ; Thomas Rohrlack, Auteur ; Christine Naggawa, Auteur ; George W. Nyakairu, Auteur
Type de document :	Article
Dans :	Hydrobiologia (638(1) JAN 2010)
Article en page(s) :	235-244
Résumé :	Catches of the economically important Nile tilapia (Oreochromis niloticus L.) from two eutrophic tropical lakes in Uganda, Lake Mburo and Murchison Bay, Lake Victoria, were examined to determine the presence of microcystins (MCs) in gut, liver and muscle of the fish. Analysis for MCs (RR, LR and YR) in both fish and water samples was by liquid chromatography coupled with mass spectroscopy (LC-MS) method. Physico-chemical parameters were also measured to establish the status of both lakes. MC-RR was the most prominent MC detected in Lake Mburo and Murchison Bay samples, there was no evidence of significant seasonal variation in the concentration of MCs in fish tissue. MCs were detected in all water samples from both study lakes. The mean concentration of MCs in water was found higher in dry times for Lake Mburo (P

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...