Publisher: Chemical Society of Nigeria

Temporal Trends of Heavy Metals In Shrimps (MACROBRACHIUM MACROBRACHION) From A Non-Tidal Fresh Water Ecosystem

I. E. Agbozu, K. Opuene, C. M. A. Iwegbue
KEYWORDS: Heavy metals, Shrimps, freshwater swamp, Taylor creek

ABSTRACT:

Temporal  trends  of  heavy  metals  (Zn,  Cd,  Ni,  Pb  and  Mn)  in  Shrimps  (Macrobrachium  macrobrachion) from  a  non-tidal  freshwater  ecosystem  in  the  Niger  Delta  in  Nigeria,  are  presented  in  this  study.  Samples of  shrimps  were  collected  with  local  fishing  basket  traps  from  the  sampling  points  for  two  years  and  the selected  metals  were  determined  by  atomic  absorption  spectrophometry.  Elevated  levels  of  the  metals were  recorded  in  the  Macrobrachium  macrobrachion  from  all  the  sampling  locations.    Generally,  higher levels  of  heavy  metals  were  recorded  in  samples  from  the  Flow  Station  Location  for  Oil  and  Gas operations,  which  was  down  a  concentration  incline  from  the  Flow  Station.    In  Macrobrachium macrobrachion,  not  several  significant  correlations (P  < 0.05)  were  obtained.   Only  Cd-Pb (r=0.85),  ZnPb  (r=0.81),  Ni-Pb  (r=0.75),  and  Zn-Cd  (r=0.59)  were  correlated,  which  indicated  that  the  mechanism for uptake of the correlated metals might be common.  


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