Accumulation of Microcystins in Silver Carp from Taihu Lake and its Influencing Factors
Cyanobacterial blooms took place in Taihu Lake every year and were widely concerned.Microcystins (MCs),the metabolites of cyanobacteria,could have potential adverse effects on ecosystems and human health.In order to examine accumulations of MCs in fish from different parts of Taihu Lake and its influencing factors,silver carp was sampled and MCs (MC-LR,MC-YR and MC-RR) were analyzed by high performance liquid chromatography tandem mass spectrometric.The results showed that MCs in different organs of silver carp was of such order:intestine wall ＞ kidney ＞ liver ＞ muscle ＞ heart,and MCs concentration in intestine wall was significantly higher than those in kidney,liver,muscle and heart.MC-RR was the main isomer of MCs which accounted for 60％ of MCs.Concentrations of MCs in muscle,kidney and heart of silver carp from the Meiliang Bay were higher than those from West Coast,South Coast and Lake Center of Taihu Lake.Based onthe significant relationships between body length,weight and MCs concentrations in organs of silver carp,it wasindicated that body length and weight were important factors that influenced accumulation of MCs and MC-RR in kidney and that of MCs in intestine wall.The water quality index of Taihu Lake including TP,algae cell number,nutrition index and number of annelid,especially TP,played important roles in MCs accumulation in liver of silver carp whilethe water quality index including TP,TN,NH4-N,Nemerow index and number of annelid,especially NH4-N also played important roles in MCs accumulation in intestine wall of silver carp.
NETL
NSTL
万方数据
维普
