Water quality and zooplankton of the Ogba River, Benin City, Nigeria

  • ED Anyanwu
  • RB Ikomi
  • FO Arimoro

Abstract

Water quality and zooplankton were investigated using standard methods at four stations in the Ogba River, Benin City, Nigeria, from January to April 2008 (dry season) and from May to August 2008 (rainy season). Nigerian water quality standards were used to assess the water quality. There were elevated values of flow velocity, BOD5, sulphate, phosphate, nitrate and sodium concentrations at Station 2, the municipal wastewater entry point, in relation to other stations. Fourteen zooplankton species, including five cladocerans, eight copepods and one rotifer, were recorded, with the quantitative distributions in the order Copepoda > Cladocera > Rotifera. Station 2 had the highest values, 10 taxa and 114 ind. l–1. The water quality parameters were within the acceptable limits of the Nigerian water quality standards, and the zooplankton was normal in abundance and diversity for such an environment.

Keywords: abundance, anthropogenic activities, composition, diversity

African Journal of Aquatic Science 2013, 38(2): 193–199

Author Biographies

ED Anyanwu
Department of Animal and Environmental Biology, Delta State University, PMB 1, Abraka, Nigeria
RB Ikomi
Department of Animal and Environmental Biology, Delta State University, PMB 1, Abraka, Nigeria
FO Arimoro
Department of Animal and Environmental Biology, Delta State University, PMB 1, Abraka, Nigeria
Published
2013-06-03
Section
Articles

Journal Identifiers


eISSN: 1727-9364
print ISSN: 1608-5914