Nigerian Institute for Oceanography and Marine Research, Nigeria
Title: Heavy metal (Pd, Cd, Fe, Zn and Mn) levels in shrimp by-catch spp. from industrial shrimp trawl fi shery in Nigerian coastal waters
Ngozi M Oguguah is a Senior Research Officer in Nigerian Institute for Oceanography and Marine Research Lagos Nigeria. She is a 2014 Agricultural Women and Research Development fellow, a 2010 Norman E. Borlaug African Women in Science Fellow. She is about rounding up her PhD in Marine Pollution at the University of Nigeria Nsukka Nigeria. She has attended many international conferences and courses and has a lot of publications to her name. She collaborates with a lot of international organizations.
By-catch is non-target mostly fish species which are obtained from Industrial Shrimp Trawl Fishery in Nigerian Coastal Waters Millions of people in Lagos feed on fish by-catch because it is affordable, small and tasty and women are involved in commercial aspect. Total sample of 500 by-catches was randomly collected from commercial shrimp trawlers monthly from March 2010 to October 2011, at the by-catch landing port at Apapa Liver-pool, Lagos, Nigeria. The samples were taken to the Nigerian Institute for Oceanography and Marine Research Laboratory where it was digested and the heavy metal (Pd, Cd, Fe, Zn and Mn) concentration in shrimp by-catch species (Cynoglossus senegalensis, Galeoides decadaetylus, Pseudolithus senegalensis, Pteriscion peli and Trichurus lepturus) were determined. Fish tissue was digested and analyzed using atomic absorption Spectrophotometer. Pseudolithus senegalensis had the highest concentration (mg l-1) of lead (0.0404±0.074), Galeoides decadaetylus had the highest concentration of Cd (0.1076±0.0151) and Fe (1.3166±0.3171), Zn (2.7705±0.2115) and Mn (0.2677±0.1376). These are all within WHO and FEPA prescribed limits, the implication is that the fish is safe to eat; further monitoring is needed to ensure food safety of fish.
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