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E. K. Ajani and S. O. Ayoola, “The Heavy Metals in the Muscle of Some Imported Frozen Fish in Ibadan, Nigeria,” Journal of Environmental Extension, Vol. 6, 2007, pp. 1-4. doi:10.4314/jext.v6i1.2753

has been cited by the following article:

• TITLE: The Limnology of Ohana Lake, a Potential Manmade Aquaculture System in Nigeria

  AUTHORS: Paul O. Ajah

  KEYWORDS: Limnology; Aquaculture; Productivity; Pollution; Fishery; Benthos

  JOURNAL NAME: Open Journal of Applied Sciences, Vol.3 No.2, June 20, 2013

  ABSTRACT: The concentrations of heavy metals (Fe > Zn > Cu > Pb > Ag) in bottom sediments and fish gills in Ohana Lake, were found to be significantly high and far exceeded FEPA and WHO environmental standards for water quality by 1.5 to 18 times, respectively. Six classes of each of phytoplankton and zooplankton with a total of 35 phytoplankton taxa comprising 46 species i.e. 35(46) and 22(28) faunal were observed. The class Chlorophyceae dominated the phytoplankton community with 18(22) followed by Cyanobacteria 6(10). The aquatic fauna was dominated by the Rotifera 8(11), followed by the Copepoda 6(9). The benthic flora community consisted of five classes of phytoplankton made up of 28(36). The class Bacillariophyceae 11(15) dominated the group followed by Chlorophyceae 10(11). Benthic fauna were made up of seven classes of 13(13). The dominant class Nemata 4(4) was followed closely by Protozoa 2(3). Ohana Lake is fast turning to a eutrophic ecosystem with accompanied algal bloom due to very high nutrient contents. The equitability or evenness indices (J) for both phytoplankton and zooplankton were lowly indicating generally low species diversities as well as predominantly unstable ecosystem. The aquacultural implications of these parameters are discussed.